diff options
Diffstat (limited to '.pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/Adafruit_NeoPixel.cpp')
| -rw-r--r-- | .pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/Adafruit_NeoPixel.cpp | 3815 |
1 files changed, 0 insertions, 3815 deletions
diff --git a/.pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/Adafruit_NeoPixel.cpp b/.pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/Adafruit_NeoPixel.cpp deleted file mode 100644 index 8301031..0000000 --- a/.pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/Adafruit_NeoPixel.cpp +++ /dev/null @@ -1,3815 +0,0 @@ -/*!
- * @file Adafruit_NeoPixel.cpp
- *
- * @mainpage Arduino Library for driving Adafruit NeoPixel addressable LEDs,
- * FLORA RGB Smart Pixels and compatible devicess -- WS2811, WS2812, WS2812B,
- * SK6812, etc.
- *
- * @section intro_sec Introduction
- *
- * This is the documentation for Adafruit's NeoPixel library for the
- * Arduino platform, allowing a broad range of microcontroller boards
- * (most AVR boards, many ARM devices, ESP8266 and ESP32, among others)
- * to control Adafruit NeoPixels, FLORA RGB Smart Pixels and compatible
- * devices -- WS2811, WS2812, WS2812B, SK6812, etc.
- *
- * Adafruit invests time and resources providing this open source code,
- * please support Adafruit and open-source hardware by purchasing products
- * from Adafruit!
- *
- * @section author Author
- *
- * Written by Phil "Paint Your Dragon" Burgess for Adafruit Industries,
- * with contributions by PJRC, Michael Miller and other members of the
- * open source community.
- * Minor change in timing for CH32 @48MHz by Maxint-RD 20260126.
- *
- * @section license License
- *
- * This file is part of the Adafruit_NeoPixel library.
- *
- * Adafruit_NeoPixel is free software: you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * Adafruit_NeoPixel is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with NeoPixel. If not, see
- * <http://www.gnu.org/licenses/>.
- *
- */
-
-#include "Adafruit_NeoPixel.h"
-
-#if defined(TARGET_LPC1768)
-#include <time.h>
-#endif
-
-#if defined(NRF52) || defined(NRF52_SERIES)
-#include "nrf.h"
-
-// Interrupt is only disabled if there is no PWM device available
-// Note: Adafruit Bluefruit nrf52 does not use this option
-// #define NRF52_DISABLE_INT
-#endif
-
-#if defined(ARDUINO_ARCH_NRF52840)
-#if defined __has_include
-#if __has_include(<pinDefinitions.h>)
-#include <pinDefinitions.h>
-#endif
-#endif
-#endif
-
-#if defined(ARDUINO_ARCH_MBED)
-#include "mbed.h" // Needed for DigitalOut and PinName
-#endif
-
-/*!
- @brief NeoPixel constructor when length, pin and pixel type are known
- at compile-time.
- @param n Number of NeoPixels in strand.
- @param p Arduino pin number which will drive the NeoPixel data in.
- @param t Pixel type -- add together NEO_* constants defined in
- Adafruit_NeoPixel.h, for example NEO_GRB+NEO_KHZ800 for
- NeoPixels expecting an 800 KHz (vs 400 KHz) data stream
- with color bytes expressed in green, red, blue order per
- pixel.
- @return Adafruit_NeoPixel object. Call the begin() function before use.
-*/
-Adafruit_NeoPixel::Adafruit_NeoPixel(uint16_t n, int16_t p, neoPixelType t)
- : begun(false), brightness(0), pixels(NULL), endTime(0) {
- updateType(t);
- updateLength(n);
- setPin(p);
-
-#if defined(ESP32)
-#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 0, 0)
- espInit();
-#endif
-#endif
-}
-
-/*!
- @brief "Empty" NeoPixel constructor when length, pin and/or pixel type
- are not known at compile-time, and must be initialized later with
- updateType(), updateLength() and setPin().
- @return Adafruit_NeoPixel object. Call the begin() function before use.
- @note This function is deprecated, here only for old projects that
- may still be calling it. New projects should instead use the
- 'new' keyword with the first constructor syntax (length, pin,
- type).
-*/
-Adafruit_NeoPixel::Adafruit_NeoPixel()
- :
-#if defined(NEO_KHZ400)
- is800KHz(true),
-#endif
- begun(false), numLEDs(0), numBytes(0), pin(-1), brightness(0),
- pixels(NULL), rOffset(1), gOffset(0), bOffset(2), wOffset(1), endTime(0) {
-}
-
-/*!
- @brief Deallocate Adafruit_NeoPixel object, set data pin back to INPUT.
-*/
-Adafruit_NeoPixel::~Adafruit_NeoPixel() {
-#ifdef ARDUINO_ARCH_ESP32
- // Release RMT resources (RMT channels and led_data)
- // by indirectly calling into espShow()
- memset(pixels, 0, numBytes);
- numLEDs = numBytes = 0;
- show();
-#endif
-
-#if defined(ARDUINO_ARCH_RP2040)
- // Release any PIO
- rp2040releasePIO();
-#endif
-
- free(pixels);
- if (pin >= 0)
- pinMode(pin, INPUT);
-}
-
-/*!
- @brief Configure NeoPixel pin for output.
- @returns False if we weren't able to claim resources required
-*/
-bool Adafruit_NeoPixel::begin(void) {
- if (pin >= 0) {
- pinMode(pin, OUTPUT);
- digitalWrite(pin, LOW);
- } else {
- begun = false;
- return false;
- }
-
-#if defined(ARDUINO_ARCH_RP2040)
- // if we're calling begin() again, unclaim any existing PIO resc.
- rp2040releasePIO();
- if (!rp2040claimPIO()) {
- begun = false;
- return false;
- }
-
-#endif
-
- begun = true;
- return true;
-}
-
-/*!
- @brief Change the length of a previously-declared Adafruit_NeoPixel
- strip object. Old data is deallocated and new data is cleared.
- Pin number and pixel format are unchanged.
- @param n New length of strip, in pixels.
- @note This function is deprecated, here only for old projects that
- may still be calling it. New projects should instead use the
- 'new' keyword with the first constructor syntax (length, pin,
- type).
-*/
-void Adafruit_NeoPixel::updateLength(uint16_t n) {
- free(pixels); // Free existing data (if any)
-
- // Allocate new data -- note: ALL PIXELS ARE CLEARED
- numBytes = n * ((wOffset == rOffset) ? 3 : 4);
- if ((pixels = (uint8_t *)malloc(numBytes))) {
- memset(pixels, 0, numBytes);
- numLEDs = n;
- } else {
- numLEDs = numBytes = 0;
- }
-}
-
-/*!
- @brief Change the pixel format of a previously-declared
- Adafruit_NeoPixel strip object. If format changes from one of
- the RGB variants to an RGBW variant (or RGBW to RGB), the old
- data will be deallocated and new data is cleared. Otherwise,
- the old data will remain in RAM and is not reordered to the
- new format, so it's advisable to follow up with clear().
- @param t Pixel type -- add together NEO_* constants defined in
- Adafruit_NeoPixel.h, for example NEO_GRB+NEO_KHZ800 for
- NeoPixels expecting an 800 KHz (vs 400 KHz) data stream
- with color bytes expressed in green, red, blue order per
- pixel.
- @note This function is deprecated, here only for old projects that
- may still be calling it. New projects should instead use the
- 'new' keyword with the first constructor syntax
- (length, pin, type).
-*/
-void Adafruit_NeoPixel::updateType(neoPixelType t) {
- bool oldThreeBytesPerPixel = (wOffset == rOffset); // false if RGBW
-
- wOffset = (t >> 6) & 0b11; // See notes in header file
- rOffset = (t >> 4) & 0b11; // regarding R/G/B/W offsets
- gOffset = (t >> 2) & 0b11;
- bOffset = t & 0b11;
-#if defined(NEO_KHZ400)
- is800KHz = (t < 256); // 400 KHz flag is 1<<8
-#endif
-
- // If bytes-per-pixel has changed (and pixel data was previously
- // allocated), re-allocate to new size. Will clear any data.
- if (pixels) {
- bool newThreeBytesPerPixel = (wOffset == rOffset);
- if (newThreeBytesPerPixel != oldThreeBytesPerPixel)
- updateLength(numLEDs);
- }
-}
-
-#if defined(ARDUINO_ARCH_CH32)
-
-// F_CPU is defined to SystemCoreClock (not constant number)
-#if SYSCLK_FREQ_144MHz_HSE == 144000000 || SYSCLK_FREQ_HSE == 144000000 || \
- SYSCLK_FREQ_144MHz_HSI == 144000000 || SYSCLK_FREQ_HSI == 144000000
-#define CH32_F_CPU 144000000
-
-#elif SYSCLK_FREQ_120MHz_HSE == 120000000 || SYSCLK_FREQ_HSE == 120000000 || \
- SYSCLK_FREQ_120MHz_HSI == 120000000 || SYSCLK_FREQ_HSI == 120000000
-#define CH32_F_CPU 120000000
-
-#elif SYSCLK_FREQ_96MHz_HSE == 96000000 || SYSCLK_FREQ_HSE == 96000000 || \
- SYSCLK_FREQ_96MHz_HSI == 96000000 || SYSCLK_FREQ_HSI == 96000000
-#define CH32_F_CPU 96000000
-
-#elif SYSCLK_FREQ_72MHz_HSE == 72000000 || SYSCLK_FREQ_HSE == 72000000 || \
- SYSCLK_FREQ_72MHz_HSI == 72000000 || SYSCLK_FREQ_HSI == 72000000
-#define CH32_F_CPU 72000000
-
-#elif SYSCLK_FREQ_56MHz_HSE == 56000000 || SYSCLK_FREQ_HSE == 56000000 || \
- SYSCLK_FREQ_56MHz_HSI == 56000000 || SYSCLK_FREQ_HSI == 56000000
-#define CH32_F_CPU 56000000
-
-#elif SYSCLK_FREQ_48MHz_HSE == 48000000 || SYSCLK_FREQ_HSE == 48000000 || \
- SYSCLK_FREQ_48MHz_HSI == 48000000 || SYSCLK_FREQ_HSI == 48000000
-#define CH32_F_CPU 48000000
-
-#endif
-
-static void ch32Show(GPIO_TypeDef *ch_port, uint32_t ch_pin, uint8_t *pixels,
- uint32_t numBytes, bool is800KHz) {
- // not support 400khz
- if (!is800KHz)
- return;
-
- volatile uint32_t *set = &ch_port->BSHR;
- volatile uint32_t *clr = &ch_port->BCR;
-
- uint8_t *ptr = pixels;
- uint8_t *end = ptr + numBytes;
- uint8_t p = *ptr++;
- uint8_t bitMask = 0x80;
-
- // NVIC_DisableIRQ(SysTicK_IRQn);
-
- while (1) {
- if (p & bitMask) { // ONE
- // High 800ns
- *set = ch_pin;
- __asm volatile("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop;"
-#if CH32_F_CPU >= 56000000
- "nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 72000000
- "nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 96000000
- "nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 120000000
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 144000000
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
- );
-
- // Low 450ns
- *clr = ch_pin;
- __asm volatile(
- "nop; nop;"
-#if CH32_F_CPU >= 56000000
- "nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 72000000
- "nop; nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 96000000
- "nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 120000000
- "nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 144000000
- "nop; nop; nop; nop; nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
- );
- } else { // ZERO
- // High 400ns
- *set = ch_pin;
- __asm volatile(
- "nop; nop; nop; nop; nop; nop; nop; nop;"
-#if CH32_F_CPU >= 56000000
- "nop; nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 72000000
- "nop; nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 96000000
- "nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 120000000
- "nop; nop; nop; "
- "nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 144000000
- "nop; nop; nop; nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
- );
-
- // Low 850ns
- *clr = ch_pin;
- __asm volatile(
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop;"
-#if CH32_F_CPU >= 56000000
- "nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 72000000
- "nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 96000000
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 120000000
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop;"
-#endif
-#if CH32_F_CPU >= 144000000
- "nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop; nop; nop; nop;"
-#endif
- );
- }
-
- if (bitMask >>= 1) {
- // Move on to the next pixel
- asm("nop;");
- } else {
- if (ptr >= end) {
- break;
- }
- p = *ptr++;
- bitMask = 0x80;
- }
- }
-
- // NVIC_EnableIRQ(SysTicK_IRQn);
-}
-#endif
-
-#if defined(ESP8266)
-// ESP8266 show() is external to enforce ICACHE_RAM_ATTR execution
-extern "C" IRAM_ATTR void espShow(uint16_t pin, uint8_t *pixels,
- uint32_t numBytes, uint8_t type);
-#elif defined(ESP32)
-extern "C" void espShow(uint16_t pin, uint8_t *pixels, uint32_t numBytes,
- uint8_t type);
-
-#endif // ESP8266
-
-#if defined(K210)
-#define KENDRYTE_K210 1
-#endif
-
-#if defined(KENDRYTE_K210)
-extern "C" void k210Show(uint8_t pin, uint8_t *pixels, uint32_t numBytes,
- boolean is800KHz);
-#endif // KENDRYTE_K210
-
-#if defined(ARDUINO_ARCH_PSOC6)
-extern "C" void psoc6_show(uint8_t pin, uint8_t *pixels, uint32_t numBytes,
- boolean is800KHz);
-#endif
-/*!
- @brief Transmit pixel data in RAM to NeoPixels.
- @note On most architectures, interrupts are temporarily disabled in
- order to achieve the correct NeoPixel signal timing. This means
- that the Arduino millis() and micros() functions, which require
- interrupts, will lose small intervals of time whenever this
- function is called (about 30 microseconds per RGB pixel, 40 for
- RGBW pixels). There's no easy fix for this, but a few
- specialized alternative or companion libraries exist that use
- very device-specific peripherals to work around it.
-*/
-void Adafruit_NeoPixel::show(void) {
-
- if (!pixels)
- return;
-
- // Data latch = 300+ microsecond pause in the output stream. Rather than
- // put a delay at the end of the function, the ending time is noted and
- // the function will simply hold off (if needed) on issuing the
- // subsequent round of data until the latch time has elapsed. This
- // allows the mainline code to start generating the next frame of data
- // rather than stalling for the latch.
- while (!canShow())
- ;
- // endTime is a private member (rather than global var) so that multiple
- // instances on different pins can be quickly issued in succession (each
- // instance doesn't delay the next).
-
- // In order to make this code runtime-configurable to work with any pin,
- // SBI/CBI instructions are eschewed in favor of full PORT writes via the
- // OUT or ST instructions. It relies on two facts: that peripheral
- // functions (such as PWM) take precedence on output pins, so our PORT-
- // wide writes won't interfere, and that interrupts are globally disabled
- // while data is being issued to the LEDs, so no other code will be
- // accessing the PORT. The code takes an initial 'snapshot' of the PORT
- // state, computes 'pin high' and 'pin low' values, and writes these back
- // to the PORT register as needed.
-
- // NRF52 may use PWM + DMA (if available), may not need to disable interrupt
- // ESP32 may not disable interrupts because espShow() uses RMT which tries
- // to acquire locks
-#if !(defined(NRF52) || defined(NRF52_SERIES) || defined(ESP32))
- noInterrupts(); // Need 100% focus on instruction timing
-#endif
-
-#if defined(ARDUINO_ARCH_PSOC6)
- psoc6_show(pin, pixels, numBytes, is800KHz);
-#endif
-
-#if defined(__AVR__)
- // AVR MCUs -- ATmega & ATtiny (no XMEGA) ---------------------------------
-
- volatile uint16_t i = numBytes; // Loop counter
- volatile uint8_t *ptr = pixels, // Pointer to next byte
- b = *ptr++, // Current byte value
- hi, // PORT w/output bit set high
- lo; // PORT w/output bit set low
-
- // Hand-tuned assembly code issues data to the LED drivers at a specific
- // rate. There's separate code for different CPU speeds (8, 12, 16 MHz)
- // for both the WS2811 (400 KHz) and WS2812 (800 KHz) drivers. The
- // datastream timing for the LED drivers allows a little wiggle room each
- // way (listed in the datasheets), so the conditions for compiling each
- // case are set up for a range of frequencies rather than just the exact
- // 8, 12 or 16 MHz values, permitting use with some close-but-not-spot-on
- // devices (e.g. 16.5 MHz DigiSpark). The ranges were arrived at based
- // on the datasheet figures and have not been extensively tested outside
- // the canonical 8/12/16 MHz speeds; there's no guarantee these will work
- // close to the extremes (or possibly they could be pushed further).
- // Keep in mind only one CPU speed case actually gets compiled; the
- // resulting program isn't as massive as it might look from source here.
-
-// 8 MHz(ish) AVR ---------------------------------------------------------
-#if (F_CPU >= 7400000UL) && (F_CPU <= 9500000UL)
-
-#if defined(NEO_KHZ400) // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
-
- volatile uint8_t n1, n2 = 0; // First, next bits out
-
- // Squeezing an 800 KHz stream out of an 8 MHz chip requires code
- // specific to each PORT register.
-
- // 10 instruction clocks per bit: HHxxxxxLLL
- // OUT instructions: ^ ^ ^ (T=0,2,7)
-
- // PORTD OUTPUT ----------------------------------------------------
-
-#if defined(PORTD)
-#if defined(PORTB) || defined(PORTC) || defined(PORTF)
- if (port == &PORTD) {
-#endif // defined(PORTB/C/F)
-
- hi = PORTD | pinMask;
- lo = PORTD & ~pinMask;
- n1 = lo;
- if (b & 0x80)
- n1 = hi;
-
- // Dirty trick: RJMPs proceeding to the next instruction are used
- // to delay two clock cycles in one instruction word (rather than
- // using two NOPs). This was necessary in order to squeeze the
- // loop down to exactly 64 words -- the maximum possible for a
- // relative branch.
-
- asm volatile(
- "headD:"
- "\n\t" // Clk Pseudocode
- // Bit 7:
- "out %[port] , %[hi]"
- "\n\t" // 1 PORT = hi
- "mov %[n2] , %[lo]"
- "\n\t" // 1 n2 = lo
- "out %[port] , %[n1]"
- "\n\t" // 1 PORT = n1
- "rjmp .+0"
- "\n\t" // 2 nop nop
- "sbrc %[byte] , 6"
- "\n\t" // 1-2 if(b & 0x40)
- "mov %[n2] , %[hi]"
- "\n\t" // 0-1 n2 = hi
- "out %[port] , %[lo]"
- "\n\t" // 1 PORT = lo
- "rjmp .+0"
- "\n\t" // 2 nop nop
- // Bit 6:
- "out %[port] , %[hi]"
- "\n\t" // 1 PORT = hi
- "mov %[n1] , %[lo]"
- "\n\t" // 1 n1 = lo
- "out %[port] , %[n2]"
- "\n\t" // 1 PORT = n2
- "rjmp .+0"
- "\n\t" // 2 nop nop
- "sbrc %[byte] , 5"
- "\n\t" // 1-2 if(b & 0x20)
- "mov %[n1] , %[hi]"
- "\n\t" // 0-1 n1 = hi
- "out %[port] , %[lo]"
- "\n\t" // 1 PORT = lo
- "rjmp .+0"
- "\n\t" // 2 nop nop
- // Bit 5:
- "out %[port] , %[hi]"
- "\n\t" // 1 PORT = hi
- "mov %[n2] , %[lo]"
- "\n\t" // 1 n2 = lo
- "out %[port] , %[n1]"
- "\n\t" // 1 PORT = n1
- "rjmp .+0"
- "\n\t" // 2 nop nop
- "sbrc %[byte] , 4"
- "\n\t" // 1-2 if(b & 0x10)
- "mov %[n2] , %[hi]"
- "\n\t" // 0-1 n2 = hi
- "out %[port] , %[lo]"
- "\n\t" // 1 PORT = lo
- "rjmp .+0"
- "\n\t" // 2 nop nop
- // Bit 4:
- "out %[port] , %[hi]"
- "\n\t" // 1 PORT = hi
- "mov %[n1] , %[lo]"
- "\n\t" // 1 n1 = lo
- "out %[port] , %[n2]"
- "\n\t" // 1 PORT = n2
- "rjmp .+0"
- "\n\t" // 2 nop nop
- "sbrc %[byte] , 3"
- "\n\t" // 1-2 if(b & 0x08)
- "mov %[n1] , %[hi]"
- "\n\t" // 0-1 n1 = hi
- "out %[port] , %[lo]"
- "\n\t" // 1 PORT = lo
- "rjmp .+0"
- "\n\t" // 2 nop nop
- // Bit 3:
- "out %[port] , %[hi]"
- "\n\t" // 1 PORT = hi
- "mov %[n2] , %[lo]"
- "\n\t" // 1 n2 = lo
- "out %[port] , %[n1]"
- "\n\t" // 1 PORT = n1
- "rjmp .+0"
- "\n\t" // 2 nop nop
- "sbrc %[byte] , 2"
- "\n\t" // 1-2 if(b & 0x04)
- "mov %[n2] , %[hi]"
- "\n\t" // 0-1 n2 = hi
- "out %[port] , %[lo]"
- "\n\t" // 1 PORT = lo
- "rjmp .+0"
- "\n\t" // 2 nop nop
- // Bit 2:
- "out %[port] , %[hi]"
- "\n\t" // 1 PORT = hi
- "mov %[n1] , %[lo]"
- "\n\t" // 1 n1 = lo
- "out %[port] , %[n2]"
- "\n\t" // 1 PORT = n2
- "rjmp .+0"
- "\n\t" // 2 nop nop
- "sbrc %[byte] , 1"
- "\n\t" // 1-2 if(b & 0x02)
- "mov %[n1] , %[hi]"
- "\n\t" // 0-1 n1 = hi
- "out %[port] , %[lo]"
- "\n\t" // 1 PORT = lo
- "rjmp .+0"
- "\n\t" // 2 nop nop
- // Bit 1:
- "out %[port] , %[hi]"
- "\n\t" // 1 PORT = hi
- "mov %[n2] , %[lo]"
- "\n\t" // 1 n2 = lo
- "out %[port] , %[n1]"
- "\n\t" // 1 PORT = n1
- "rjmp .+0"
- "\n\t" // 2 nop nop
- "sbrc %[byte] , 0"
- "\n\t" // 1-2 if(b & 0x01)
- "mov %[n2] , %[hi]"
- "\n\t" // 0-1 n2 = hi
- "out %[port] , %[lo]"
- "\n\t" // 1 PORT = lo
- "sbiw %[count], 1"
- "\n\t" // 2 i-- (don't act on Z flag yet)
- // Bit 0:
- "out %[port] , %[hi]"
- "\n\t" // 1 PORT = hi
- "mov %[n1] , %[lo]"
- "\n\t" // 1 n1 = lo
- "out %[port] , %[n2]"
- "\n\t" // 1 PORT = n2
- "ld %[byte] , %a[ptr]+"
- "\n\t" // 2 b = *ptr++
- "sbrc %[byte] , 7"
- "\n\t" // 1-2 if(b & 0x80)
- "mov %[n1] , %[hi]"
- "\n\t" // 0-1 n1 = hi
- "out %[port] , %[lo]"
- "\n\t" // 1 PORT = lo
- "brne headD"
- "\n" // 2 while(i) (Z flag set above)
- : [byte] "+r"(b), [n1] "+r"(n1), [n2] "+r"(n2), [count] "+w"(i)
- : [port] "I"(_SFR_IO_ADDR(PORTD)), [ptr] "e"(ptr), [hi] "r"(hi),
- [lo] "r"(lo));
-
-#if defined(PORTB) || defined(PORTC) || defined(PORTF)
- } else // other PORT(s)
-#endif // defined(PORTB/C/F)
-#endif // defined(PORTD)
-
- // PORTB OUTPUT ----------------------------------------------------
-
-#if defined(PORTB)
-#if defined(PORTD) || defined(PORTC) || defined(PORTF)
- if (port == &PORTB) {
-#endif // defined(PORTD/C/F)
-
- // Same as above, just switched to PORTB and stripped of comments.
- hi = PORTB | pinMask;
- lo = PORTB & ~pinMask;
- n1 = lo;
- if (b & 0x80)
- n1 = hi;
-
- asm volatile(
- "headB:"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n2] , %[lo]"
- "\n\t"
- "out %[port] , %[n1]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 6"
- "\n\t"
- "mov %[n2] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n1] , %[lo]"
- "\n\t"
- "out %[port] , %[n2]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 5"
- "\n\t"
- "mov %[n1] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n2] , %[lo]"
- "\n\t"
- "out %[port] , %[n1]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 4"
- "\n\t"
- "mov %[n2] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n1] , %[lo]"
- "\n\t"
- "out %[port] , %[n2]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 3"
- "\n\t"
- "mov %[n1] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n2] , %[lo]"
- "\n\t"
- "out %[port] , %[n1]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 2"
- "\n\t"
- "mov %[n2] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n1] , %[lo]"
- "\n\t"
- "out %[port] , %[n2]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 1"
- "\n\t"
- "mov %[n1] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n2] , %[lo]"
- "\n\t"
- "out %[port] , %[n1]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 0"
- "\n\t"
- "mov %[n2] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "sbiw %[count], 1"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n1] , %[lo]"
- "\n\t"
- "out %[port] , %[n2]"
- "\n\t"
- "ld %[byte] , %a[ptr]+"
- "\n\t"
- "sbrc %[byte] , 7"
- "\n\t"
- "mov %[n1] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "brne headB"
- "\n"
- : [byte] "+r"(b), [n1] "+r"(n1), [n2] "+r"(n2), [count] "+w"(i)
- : [port] "I"(_SFR_IO_ADDR(PORTB)), [ptr] "e"(ptr), [hi] "r"(hi),
- [lo] "r"(lo));
-
-#if defined(PORTD) || defined(PORTC) || defined(PORTF)
- }
-#endif
-#if defined(PORTC) || defined(PORTF)
- else
-#endif // defined(PORTC/F)
-#endif // defined(PORTB)
-
- // PORTC OUTPUT ----------------------------------------------------
-
-#if defined(PORTC)
-#if defined(PORTD) || defined(PORTB) || defined(PORTF)
- if (port == &PORTC) {
-#endif // defined(PORTD/B/F)
-
- // Same as above, just switched to PORTC and stripped of comments.
- hi = PORTC | pinMask;
- lo = PORTC & ~pinMask;
- n1 = lo;
- if (b & 0x80)
- n1 = hi;
-
- asm volatile(
- "headC:"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n2] , %[lo]"
- "\n\t"
- "out %[port] , %[n1]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 6"
- "\n\t"
- "mov %[n2] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n1] , %[lo]"
- "\n\t"
- "out %[port] , %[n2]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 5"
- "\n\t"
- "mov %[n1] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n2] , %[lo]"
- "\n\t"
- "out %[port] , %[n1]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 4"
- "\n\t"
- "mov %[n2] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n1] , %[lo]"
- "\n\t"
- "out %[port] , %[n2]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 3"
- "\n\t"
- "mov %[n1] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n2] , %[lo]"
- "\n\t"
- "out %[port] , %[n1]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 2"
- "\n\t"
- "mov %[n2] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n1] , %[lo]"
- "\n\t"
- "out %[port] , %[n2]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 1"
- "\n\t"
- "mov %[n1] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n2] , %[lo]"
- "\n\t"
- "out %[port] , %[n1]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 0"
- "\n\t"
- "mov %[n2] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "sbiw %[count], 1"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n1] , %[lo]"
- "\n\t"
- "out %[port] , %[n2]"
- "\n\t"
- "ld %[byte] , %a[ptr]+"
- "\n\t"
- "sbrc %[byte] , 7"
- "\n\t"
- "mov %[n1] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "brne headC"
- "\n"
- : [byte] "+r"(b), [n1] "+r"(n1), [n2] "+r"(n2), [count] "+w"(i)
- : [port] "I"(_SFR_IO_ADDR(PORTC)), [ptr] "e"(ptr), [hi] "r"(hi),
- [lo] "r"(lo));
-
-#if defined(PORTD) || defined(PORTB) || defined(PORTF)
- }
-#endif // defined(PORTD/B/F)
-#if defined(PORTF)
- else
-#endif
-#endif // defined(PORTC)
-
- // PORTF OUTPUT ----------------------------------------------------
-
-#if defined(PORTF)
-#if defined(PORTD) || defined(PORTB) || defined(PORTC)
- if (port == &PORTF) {
-#endif // defined(PORTD/B/C)
-
- hi = PORTF | pinMask;
- lo = PORTF & ~pinMask;
- n1 = lo;
- if (b & 0x80)
- n1 = hi;
-
- asm volatile(
- "headF:"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n2] , %[lo]"
- "\n\t"
- "out %[port] , %[n1]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 6"
- "\n\t"
- "mov %[n2] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n1] , %[lo]"
- "\n\t"
- "out %[port] , %[n2]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 5"
- "\n\t"
- "mov %[n1] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n2] , %[lo]"
- "\n\t"
- "out %[port] , %[n1]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 4"
- "\n\t"
- "mov %[n2] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n1] , %[lo]"
- "\n\t"
- "out %[port] , %[n2]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 3"
- "\n\t"
- "mov %[n1] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n2] , %[lo]"
- "\n\t"
- "out %[port] , %[n1]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 2"
- "\n\t"
- "mov %[n2] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n1] , %[lo]"
- "\n\t"
- "out %[port] , %[n2]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 1"
- "\n\t"
- "mov %[n1] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n2] , %[lo]"
- "\n\t"
- "out %[port] , %[n1]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "sbrc %[byte] , 0"
- "\n\t"
- "mov %[n2] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "sbiw %[count], 1"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "mov %[n1] , %[lo]"
- "\n\t"
- "out %[port] , %[n2]"
- "\n\t"
- "ld %[byte] , %a[ptr]+"
- "\n\t"
- "sbrc %[byte] , 7"
- "\n\t"
- "mov %[n1] , %[hi]"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "brne headF"
- "\n"
- : [byte] "+r"(b), [n1] "+r"(n1), [n2] "+r"(n2), [count] "+w"(i)
- : [port] "I"(_SFR_IO_ADDR(PORTF)), [ptr] "e"(ptr), [hi] "r"(hi),
- [lo] "r"(lo));
-
-#if defined(PORTD) || defined(PORTB) || defined(PORTC)
- }
-#endif // defined(PORTD/B/C)
-#endif // defined(PORTF)
-
-#if defined(NEO_KHZ400)
- } else { // end 800 KHz, do 400 KHz
-
- // Timing is more relaxed; unrolling the inner loop for each bit is
- // not necessary. Still using the peculiar RJMPs as 2X NOPs, not out
- // of need but just to trim the code size down a little.
- // This 400-KHz-datastream-on-8-MHz-CPU code is not quite identical
- // to the 800-on-16 code later -- the hi/lo timing between WS2811 and
- // WS2812 is not simply a 2:1 scale!
-
- // 20 inst. clocks per bit: HHHHxxxxxxLLLLLLLLLL
- // ST instructions: ^ ^ ^ (T=0,4,10)
-
- volatile uint8_t next, bit;
-
- hi = *port | pinMask;
- lo = *port & ~pinMask;
- next = lo;
- bit = 8;
-
- asm volatile("head20%=:"
- "\n\t" // Clk Pseudocode (T = 0)
- "st %a[port], %[hi]"
- "\n\t" // 2 PORT = hi (T = 2)
- "sbrc %[byte] , 7"
- "\n\t" // 1-2 if(b & 128)
- "mov %[next], %[hi]"
- "\n\t" // 0-1 next = hi (T = 4)
- "st %a[port], %[next]"
- "\n\t" // 2 PORT = next (T = 6)
- "mov %[next] , %[lo]"
- "\n\t" // 1 next = lo (T = 7)
- "dec %[bit]"
- "\n\t" // 1 bit-- (T = 8)
- "breq nextbyte20%="
- "\n\t" // 1-2 if(bit == 0)
- "rol %[byte]"
- "\n\t" // 1 b <<= 1 (T = 10)
- "st %a[port], %[lo]"
- "\n\t" // 2 PORT = lo (T = 12)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 14)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 16)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 18)
- "rjmp head20%="
- "\n\t" // 2 -> head20 (next bit out)
- "nextbyte20%=:"
- "\n\t" // (T = 10)
- "st %a[port], %[lo]"
- "\n\t" // 2 PORT = lo (T = 12)
- "nop"
- "\n\t" // 1 nop (T = 13)
- "ldi %[bit] , 8"
- "\n\t" // 1 bit = 8 (T = 14)
- "ld %[byte] , %a[ptr]+"
- "\n\t" // 2 b = *ptr++ (T = 16)
- "sbiw %[count], 1"
- "\n\t" // 2 i-- (T = 18)
- "brne head20%="
- "\n" // 2 if(i != 0) -> (next byte)
- : [port] "+e"(port), [byte] "+r"(b), [bit] "+r"(bit),
- [next] "+r"(next), [count] "+w"(i)
- : [hi] "r"(hi), [lo] "r"(lo), [ptr] "e"(ptr));
- }
-#endif // NEO_KHZ400
-
-// 12 MHz(ish) AVR --------------------------------------------------------
-#elif (F_CPU >= 11100000UL) && (F_CPU <= 14300000UL)
-
-#if defined(NEO_KHZ400) // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
-
- // In the 12 MHz case, an optimized 800 KHz datastream (no dead time
- // between bytes) requires a PORT-specific loop similar to the 8 MHz
- // code (but a little more relaxed in this case).
-
- // 15 instruction clocks per bit: HHHHxxxxxxLLLLL
- // OUT instructions: ^ ^ ^ (T=0,4,10)
-
- volatile uint8_t next;
-
- // PORTD OUTPUT ----------------------------------------------------
-
-#if defined(PORTD)
-#if defined(PORTB) || defined(PORTC) || defined(PORTF)
- if (port == &PORTD) {
-#endif // defined(PORTB/C/F)
-
- hi = PORTD | pinMask;
- lo = PORTD & ~pinMask;
- next = lo;
- if (b & 0x80)
- next = hi;
-
- // Don't "optimize" the OUT calls into the bitTime subroutine;
- // we're exploiting the RCALL and RET as 3- and 4-cycle NOPs!
- asm volatile("headD:"
- "\n\t" // (T = 0)
- "out %[port], %[hi]"
- "\n\t" // (T = 1)
- "rcall bitTimeD"
- "\n\t" // Bit 7 (T = 15)
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeD"
- "\n\t" // Bit 6
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeD"
- "\n\t" // Bit 5
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeD"
- "\n\t" // Bit 4
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeD"
- "\n\t" // Bit 3
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeD"
- "\n\t" // Bit 2
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeD"
- "\n\t" // Bit 1
- // Bit 0:
- "out %[port] , %[hi]"
- "\n\t" // 1 PORT = hi (T = 1)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 3)
- "ld %[byte] , %a[ptr]+"
- "\n\t" // 2 b = *ptr++ (T = 5)
- "out %[port] , %[next]"
- "\n\t" // 1 PORT = next (T = 6)
- "mov %[next] , %[lo]"
- "\n\t" // 1 next = lo (T = 7)
- "sbrc %[byte] , 7"
- "\n\t" // 1-2 if(b & 0x80) (T = 8)
- "mov %[next] , %[hi]"
- "\n\t" // 0-1 next = hi (T = 9)
- "nop"
- "\n\t" // 1 (T = 10)
- "out %[port] , %[lo]"
- "\n\t" // 1 PORT = lo (T = 11)
- "sbiw %[count], 1"
- "\n\t" // 2 i-- (T = 13)
- "brne headD"
- "\n\t" // 2 if(i != 0) -> (next byte)
- "rjmp doneD"
- "\n\t"
- "bitTimeD:"
- "\n\t" // nop nop nop (T = 4)
- "out %[port], %[next]"
- "\n\t" // 1 PORT = next (T = 5)
- "mov %[next], %[lo]"
- "\n\t" // 1 next = lo (T = 6)
- "rol %[byte]"
- "\n\t" // 1 b <<= 1 (T = 7)
- "sbrc %[byte], 7"
- "\n\t" // 1-2 if(b & 0x80) (T = 8)
- "mov %[next], %[hi]"
- "\n\t" // 0-1 next = hi (T = 9)
- "nop"
- "\n\t" // 1 (T = 10)
- "out %[port], %[lo]"
- "\n\t" // 1 PORT = lo (T = 11)
- "ret"
- "\n\t" // 4 nop nop nop nop (T = 15)
- "doneD:"
- "\n"
- : [byte] "+r"(b), [next] "+r"(next), [count] "+w"(i)
- : [port] "I"(_SFR_IO_ADDR(PORTD)), [ptr] "e"(ptr),
- [hi] "r"(hi), [lo] "r"(lo));
-
-#if defined(PORTB) || defined(PORTC) || defined(PORTF)
- } else // other PORT(s)
-#endif // defined(PORTB/C/F)
-#endif // defined(PORTD)
-
- // PORTB OUTPUT ----------------------------------------------------
-
-#if defined(PORTB)
-#if defined(PORTD) || defined(PORTC) || defined(PORTF)
- if (port == &PORTB) {
-#endif // defined(PORTD/C/F)
-
- hi = PORTB | pinMask;
- lo = PORTB & ~pinMask;
- next = lo;
- if (b & 0x80)
- next = hi;
-
- // Same as above, just set for PORTB & stripped of comments
- asm volatile("headB:"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeB"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeB"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeB"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeB"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeB"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeB"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeB"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "ld %[byte] , %a[ptr]+"
- "\n\t"
- "out %[port] , %[next]"
- "\n\t"
- "mov %[next] , %[lo]"
- "\n\t"
- "sbrc %[byte] , 7"
- "\n\t"
- "mov %[next] , %[hi]"
- "\n\t"
- "nop"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "sbiw %[count], 1"
- "\n\t"
- "brne headB"
- "\n\t"
- "rjmp doneB"
- "\n\t"
- "bitTimeB:"
- "\n\t"
- "out %[port], %[next]"
- "\n\t"
- "mov %[next], %[lo]"
- "\n\t"
- "rol %[byte]"
- "\n\t"
- "sbrc %[byte], 7"
- "\n\t"
- "mov %[next], %[hi]"
- "\n\t"
- "nop"
- "\n\t"
- "out %[port], %[lo]"
- "\n\t"
- "ret"
- "\n\t"
- "doneB:"
- "\n"
- : [byte] "+r"(b), [next] "+r"(next), [count] "+w"(i)
- : [port] "I"(_SFR_IO_ADDR(PORTB)), [ptr] "e"(ptr),
- [hi] "r"(hi), [lo] "r"(lo));
-
-#if defined(PORTD) || defined(PORTC) || defined(PORTF)
- }
-#endif
-#if defined(PORTC) || defined(PORTF)
- else
-#endif // defined(PORTC/F)
-#endif // defined(PORTB)
-
- // PORTC OUTPUT ----------------------------------------------------
-
-#if defined(PORTC)
-#if defined(PORTD) || defined(PORTB) || defined(PORTF)
- if (port == &PORTC) {
-#endif // defined(PORTD/B/F)
-
- hi = PORTC | pinMask;
- lo = PORTC & ~pinMask;
- next = lo;
- if (b & 0x80)
- next = hi;
-
- // Same as above, just set for PORTC & stripped of comments
- asm volatile("headC:"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "ld %[byte] , %a[ptr]+"
- "\n\t"
- "out %[port] , %[next]"
- "\n\t"
- "mov %[next] , %[lo]"
- "\n\t"
- "sbrc %[byte] , 7"
- "\n\t"
- "mov %[next] , %[hi]"
- "\n\t"
- "nop"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "sbiw %[count], 1"
- "\n\t"
- "brne headC"
- "\n\t"
- "rjmp doneC"
- "\n\t"
- "bitTimeC:"
- "\n\t"
- "out %[port], %[next]"
- "\n\t"
- "mov %[next], %[lo]"
- "\n\t"
- "rol %[byte]"
- "\n\t"
- "sbrc %[byte], 7"
- "\n\t"
- "mov %[next], %[hi]"
- "\n\t"
- "nop"
- "\n\t"
- "out %[port], %[lo]"
- "\n\t"
- "ret"
- "\n\t"
- "doneC:"
- "\n"
- : [byte] "+r"(b), [next] "+r"(next), [count] "+w"(i)
- : [port] "I"(_SFR_IO_ADDR(PORTC)), [ptr] "e"(ptr),
- [hi] "r"(hi), [lo] "r"(lo));
-
-#if defined(PORTD) || defined(PORTB) || defined(PORTF)
- }
-#endif // defined(PORTD/B/F)
-#if defined(PORTF)
- else
-#endif
-#endif // defined(PORTC)
-
- // PORTF OUTPUT ----------------------------------------------------
-
-#if defined(PORTF)
-#if defined(PORTD) || defined(PORTB) || defined(PORTC)
- if (port == &PORTF) {
-#endif // defined(PORTD/B/C)
-
- hi = PORTF | pinMask;
- lo = PORTF & ~pinMask;
- next = lo;
- if (b & 0x80)
- next = hi;
-
- // Same as above, just set for PORTF & stripped of comments
- asm volatile("headF:"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port], %[hi]"
- "\n\t"
- "rcall bitTimeC"
- "\n\t"
- "out %[port] , %[hi]"
- "\n\t"
- "rjmp .+0"
- "\n\t"
- "ld %[byte] , %a[ptr]+"
- "\n\t"
- "out %[port] , %[next]"
- "\n\t"
- "mov %[next] , %[lo]"
- "\n\t"
- "sbrc %[byte] , 7"
- "\n\t"
- "mov %[next] , %[hi]"
- "\n\t"
- "nop"
- "\n\t"
- "out %[port] , %[lo]"
- "\n\t"
- "sbiw %[count], 1"
- "\n\t"
- "brne headF"
- "\n\t"
- "rjmp doneC"
- "\n\t"
- "bitTimeC:"
- "\n\t"
- "out %[port], %[next]"
- "\n\t"
- "mov %[next], %[lo]"
- "\n\t"
- "rol %[byte]"
- "\n\t"
- "sbrc %[byte], 7"
- "\n\t"
- "mov %[next], %[hi]"
- "\n\t"
- "nop"
- "\n\t"
- "out %[port], %[lo]"
- "\n\t"
- "ret"
- "\n\t"
- "doneC:"
- "\n"
- : [byte] "+r"(b), [next] "+r"(next), [count] "+w"(i)
- : [port] "I"(_SFR_IO_ADDR(PORTF)), [ptr] "e"(ptr),
- [hi] "r"(hi), [lo] "r"(lo));
-
-#if defined(PORTD) || defined(PORTB) || defined(PORTC)
- }
-#endif // defined(PORTD/B/C)
-#endif // defined(PORTF)
-
-#if defined(NEO_KHZ400)
- } else { // 400 KHz
-
- // 30 instruction clocks per bit: HHHHHHxxxxxxxxxLLLLLLLLLLLLLLL
- // ST instructions: ^ ^ ^ (T=0,6,15)
-
- volatile uint8_t next, bit;
-
- hi = *port | pinMask;
- lo = *port & ~pinMask;
- next = lo;
- bit = 8;
-
- asm volatile("head30:"
- "\n\t" // Clk Pseudocode (T = 0)
- "st %a[port], %[hi]"
- "\n\t" // 2 PORT = hi (T = 2)
- "sbrc %[byte] , 7"
- "\n\t" // 1-2 if(b & 128)
- "mov %[next], %[hi]"
- "\n\t" // 0-1 next = hi (T = 4)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 6)
- "st %a[port], %[next]"
- "\n\t" // 2 PORT = next (T = 8)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 10)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 12)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 14)
- "nop"
- "\n\t" // 1 nop (T = 15)
- "st %a[port], %[lo]"
- "\n\t" // 2 PORT = lo (T = 17)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 19)
- "dec %[bit]"
- "\n\t" // 1 bit-- (T = 20)
- "breq nextbyte30"
- "\n\t" // 1-2 if(bit == 0)
- "rol %[byte]"
- "\n\t" // 1 b <<= 1 (T = 22)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 24)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 26)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 28)
- "rjmp head30"
- "\n\t" // 2 -> head30 (next bit out)
- "nextbyte30:"
- "\n\t" // (T = 22)
- "nop"
- "\n\t" // 1 nop (T = 23)
- "ldi %[bit] , 8"
- "\n\t" // 1 bit = 8 (T = 24)
- "ld %[byte] , %a[ptr]+"
- "\n\t" // 2 b = *ptr++ (T = 26)
- "sbiw %[count], 1"
- "\n\t" // 2 i-- (T = 28)
- "brne head30"
- "\n" // 1-2 if(i != 0) -> (next byte)
- : [port] "+e"(port), [byte] "+r"(b), [bit] "+r"(bit),
- [next] "+r"(next), [count] "+w"(i)
- : [hi] "r"(hi), [lo] "r"(lo), [ptr] "e"(ptr));
- }
-#endif // NEO_KHZ400
-
-// 16 MHz(ish) AVR --------------------------------------------------------
-#elif (F_CPU >= 15400000UL) && (F_CPU <= 19000000L)
-
-#if defined(NEO_KHZ400) // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
-
- // WS2811 and WS2812 have different hi/lo duty cycles; this is
- // similar but NOT an exact copy of the prior 400-on-8 code.
-
- // 20 inst. clocks per bit: HHHHHxxxxxxxxLLLLLLL
- // ST instructions: ^ ^ ^ (T=0,5,13)
-
- volatile uint8_t next, bit;
-
- hi = *port | pinMask;
- lo = *port & ~pinMask;
- next = lo;
- bit = 8;
-
- asm volatile("head20%=:"
- "\n\t" // Clk Pseudocode (T = 0)
- "st %a[port], %[hi]"
- "\n\t" // 2 PORT = hi (T = 2)
- "sbrc %[byte], 7"
- "\n\t" // 1-2 if(b & 128)
- "mov %[next], %[hi]"
- "\n\t" // 0-1 next = hi (T = 4)
- "dec %[bit]"
- "\n\t" // 1 bit-- (T = 5)
- "st %a[port], %[next]"
- "\n\t" // 2 PORT = next (T = 7)
- "mov %[next] , %[lo]"
- "\n\t" // 1 next = lo (T = 8)
- "breq nextbyte20%="
- "\n\t" // 1-2 if(bit == 0) (from dec above)
- "rol %[byte]"
- "\n\t" // 1 b <<= 1 (T = 10)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 12)
- "nop"
- "\n\t" // 1 nop (T = 13)
- "st %a[port], %[lo]"
- "\n\t" // 2 PORT = lo (T = 15)
- "nop"
- "\n\t" // 1 nop (T = 16)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 18)
- "rjmp head20%="
- "\n\t" // 2 -> head20 (next bit out)
- "nextbyte20%=:"
- "\n\t" // (T = 10)
- "ldi %[bit] , 8"
- "\n\t" // 1 bit = 8 (T = 11)
- "ld %[byte] , %a[ptr]+"
- "\n\t" // 2 b = *ptr++ (T = 13)
- "st %a[port], %[lo]"
- "\n\t" // 2 PORT = lo (T = 15)
- "nop"
- "\n\t" // 1 nop (T = 16)
- "sbiw %[count], 1"
- "\n\t" // 2 i-- (T = 18)
- "brne head20%="
- "\n" // 2 if(i != 0) -> (next byte)
- : [port] "+e"(port), [byte] "+r"(b), [bit] "+r"(bit),
- [next] "+r"(next), [count] "+w"(i)
- : [ptr] "e"(ptr), [hi] "r"(hi), [lo] "r"(lo));
-
-#if defined(NEO_KHZ400)
- } else { // 400 KHz
-
- // The 400 KHz clock on 16 MHz MCU is the most 'relaxed' version.
-
- // 40 inst. clocks per bit: HHHHHHHHxxxxxxxxxxxxLLLLLLLLLLLLLLLLLLLL
- // ST instructions: ^ ^ ^ (T=0,8,20)
-
- volatile uint8_t next, bit;
-
- hi = *port | pinMask;
- lo = *port & ~pinMask;
- next = lo;
- bit = 8;
-
- asm volatile("head40%=:"
- "\n\t" // Clk Pseudocode (T = 0)
- "st %a[port], %[hi]"
- "\n\t" // 2 PORT = hi (T = 2)
- "sbrc %[byte] , 7"
- "\n\t" // 1-2 if(b & 128)
- "mov %[next] , %[hi]"
- "\n\t" // 0-1 next = hi (T = 4)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 6)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 8)
- "st %a[port], %[next]"
- "\n\t" // 2 PORT = next (T = 10)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 12)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 14)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 16)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 18)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 20)
- "st %a[port], %[lo]"
- "\n\t" // 2 PORT = lo (T = 22)
- "nop"
- "\n\t" // 1 nop (T = 23)
- "mov %[next] , %[lo]"
- "\n\t" // 1 next = lo (T = 24)
- "dec %[bit]"
- "\n\t" // 1 bit-- (T = 25)
- "breq nextbyte40%="
- "\n\t" // 1-2 if(bit == 0)
- "rol %[byte]"
- "\n\t" // 1 b <<= 1 (T = 27)
- "nop"
- "\n\t" // 1 nop (T = 28)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 30)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 32)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 34)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 36)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 38)
- "rjmp head40%="
- "\n\t" // 2 -> head40 (next bit out)
- "nextbyte40%=:"
- "\n\t" // (T = 27)
- "ldi %[bit] , 8"
- "\n\t" // 1 bit = 8 (T = 28)
- "ld %[byte] , %a[ptr]+"
- "\n\t" // 2 b = *ptr++ (T = 30)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 32)
- "st %a[port], %[lo]"
- "\n\t" // 2 PORT = lo (T = 34)
- "rjmp .+0"
- "\n\t" // 2 nop nop (T = 36)
- "sbiw %[count], 1"
- "\n\t" // 2 i-- (T = 38)
- "brne head40%="
- "\n" // 1-2 if(i != 0) -> (next byte)
- : [port] "+e"(port), [byte] "+r"(b), [bit] "+r"(bit),
- [next] "+r"(next), [count] "+w"(i)
- : [ptr] "e"(ptr), [hi] "r"(hi), [lo] "r"(lo));
- }
-#endif // NEO_KHZ400
-
-#else
-#error "CPU SPEED NOT SUPPORTED"
-#endif // end F_CPU ifdefs on __AVR__
-
- // END AVR ----------------------------------------------------------------
-
-#elif defined(__arm__)
-
- // ARM MCUs -- Teensy 3.0, 3.1, LC, Arduino Due, RP2040 -------------------
-
-#if defined(ARDUINO_ARCH_RP2040)
- // Use PIO
- rp2040Show(pixels, numBytes);
-
-#elif defined(TEENSYDUINO) && \
- defined(KINETISK) // Teensy 3.0, 3.1, 3.2, 3.5, 3.6
-#define CYCLES_800_T0H (F_CPU / 4000000)
-#define CYCLES_800_T1H (F_CPU / 1250000)
-#define CYCLES_800 (F_CPU / 800000)
-#define CYCLES_400_T0H (F_CPU / 2000000)
-#define CYCLES_400_T1H (F_CPU / 833333)
-#define CYCLES_400 (F_CPU / 400000)
-
- uint8_t *p = pixels, *end = p + numBytes, pix, mask;
- volatile uint8_t *set = portSetRegister(pin), *clr = portClearRegister(pin);
- uint32_t cyc;
-
- ARM_DEMCR |= ARM_DEMCR_TRCENA;
- ARM_DWT_CTRL |= ARM_DWT_CTRL_CYCCNTENA;
-
-#if defined(NEO_KHZ400) // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
- cyc = ARM_DWT_CYCCNT + CYCLES_800;
- while (p < end) {
- pix = *p++;
- for (mask = 0x80; mask; mask >>= 1) {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_800)
- ;
- cyc = ARM_DWT_CYCCNT;
- *set = 1;
- if (pix & mask) {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_800_T1H)
- ;
- } else {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_800_T0H)
- ;
- }
- *clr = 1;
- }
- }
- while (ARM_DWT_CYCCNT - cyc < CYCLES_800)
- ;
-#if defined(NEO_KHZ400)
- } else { // 400 kHz bitstream
- cyc = ARM_DWT_CYCCNT + CYCLES_400;
- while (p < end) {
- pix = *p++;
- for (mask = 0x80; mask; mask >>= 1) {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_400)
- ;
- cyc = ARM_DWT_CYCCNT;
- *set = 1;
- if (pix & mask) {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_400_T1H)
- ;
- } else {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_400_T0H)
- ;
- }
- *clr = 1;
- }
- }
- while (ARM_DWT_CYCCNT - cyc < CYCLES_400)
- ;
- }
-#endif // NEO_KHZ400
-
-#elif defined(TEENSYDUINO) && (defined(__IMXRT1052__) || defined(__IMXRT1062__))
-#define CYCLES_800_T0H (F_CPU_ACTUAL / 4000000)
-#define CYCLES_800_T1H (F_CPU_ACTUAL / 1250000)
-#define CYCLES_800 (F_CPU_ACTUAL / 800000)
-#define CYCLES_400_T0H (F_CPU_ACTUAL / 2000000)
-#define CYCLES_400_T1H (F_CPU_ACTUAL / 833333)
-#define CYCLES_400 (F_CPU_ACTUAL / 400000)
-
- uint8_t *p = pixels, *end = p + numBytes, pix, mask;
- volatile uint32_t *set = portSetRegister(pin),
- *clr = portClearRegister(pin);
- uint32_t cyc, msk = digitalPinToBitMask(pin);
-
- ARM_DEMCR |= ARM_DEMCR_TRCENA;
- ARM_DWT_CTRL |= ARM_DWT_CTRL_CYCCNTENA;
-
-#if defined(NEO_KHZ400) // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
- cyc = ARM_DWT_CYCCNT + CYCLES_800;
- while (p < end) {
- pix = *p++;
- for (mask = 0x80; mask; mask >>= 1) {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_800)
- ;
- cyc = ARM_DWT_CYCCNT;
- *set = msk;
- if (pix & mask) {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_800_T1H)
- ;
- } else {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_800_T0H)
- ;
- }
- *clr = msk;
- }
- }
- while (ARM_DWT_CYCCNT - cyc < CYCLES_800)
- ;
-#if defined(NEO_KHZ400)
- } else { // 400 kHz bitstream
- cyc = ARM_DWT_CYCCNT + CYCLES_400;
- while (p < end) {
- pix = *p++;
- for (mask = 0x80; mask; mask >>= 1) {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_400)
- ;
- cyc = ARM_DWT_CYCCNT;
- *set = msk;
- if (pix & mask) {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_400_T1H)
- ;
- } else {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_400_T0H)
- ;
- }
- *clr = msk;
- }
- }
- while (ARM_DWT_CYCCNT - cyc < CYCLES_400)
- ;
- }
-#endif // NEO_KHZ400
-
-#elif defined(TEENSYDUINO) && defined(__MKL26Z64__) // Teensy-LC
-
-#if F_CPU == 48000000
- uint8_t *p = pixels, pix, count, dly, bitmask = digitalPinToBitMask(pin);
- volatile uint8_t *reg = portSetRegister(pin);
- uint32_t num = numBytes;
- asm volatile("L%=_begin:"
- "\n\t"
- "ldrb %[pix], [%[p], #0]"
- "\n\t"
- "lsl %[pix], #24"
- "\n\t"
- "movs %[count], #7"
- "\n\t"
- "L%=_loop:"
- "\n\t"
- "lsl %[pix], #1"
- "\n\t"
- "bcs L%=_loop_one"
- "\n\t"
- "L%=_loop_zero:"
- "\n\t"
- "strb %[bitmask], [%[reg], #0]"
- "\n\t"
- "movs %[dly], #4"
- "\n\t"
- "L%=_loop_delay_T0H:"
- "\n\t"
- "sub %[dly], #1"
- "\n\t"
- "bne L%=_loop_delay_T0H"
- "\n\t"
- "strb %[bitmask], [%[reg], #4]"
- "\n\t"
- "movs %[dly], #13"
- "\n\t"
- "L%=_loop_delay_T0L:"
- "\n\t"
- "sub %[dly], #1"
- "\n\t"
- "bne L%=_loop_delay_T0L"
- "\n\t"
- "b L%=_next"
- "\n\t"
- "L%=_loop_one:"
- "\n\t"
- "strb %[bitmask], [%[reg], #0]"
- "\n\t"
- "movs %[dly], #13"
- "\n\t"
- "L%=_loop_delay_T1H:"
- "\n\t"
- "sub %[dly], #1"
- "\n\t"
- "bne L%=_loop_delay_T1H"
- "\n\t"
- "strb %[bitmask], [%[reg], #4]"
- "\n\t"
- "movs %[dly], #4"
- "\n\t"
- "L%=_loop_delay_T1L:"
- "\n\t"
- "sub %[dly], #1"
- "\n\t"
- "bne L%=_loop_delay_T1L"
- "\n\t"
- "nop"
- "\n\t"
- "L%=_next:"
- "\n\t"
- "sub %[count], #1"
- "\n\t"
- "bne L%=_loop"
- "\n\t"
- "lsl %[pix], #1"
- "\n\t"
- "bcs L%=_last_one"
- "\n\t"
- "L%=_last_zero:"
- "\n\t"
- "strb %[bitmask], [%[reg], #0]"
- "\n\t"
- "movs %[dly], #4"
- "\n\t"
- "L%=_last_delay_T0H:"
- "\n\t"
- "sub %[dly], #1"
- "\n\t"
- "bne L%=_last_delay_T0H"
- "\n\t"
- "strb %[bitmask], [%[reg], #4]"
- "\n\t"
- "movs %[dly], #10"
- "\n\t"
- "L%=_last_delay_T0L:"
- "\n\t"
- "sub %[dly], #1"
- "\n\t"
- "bne L%=_last_delay_T0L"
- "\n\t"
- "b L%=_repeat"
- "\n\t"
- "L%=_last_one:"
- "\n\t"
- "strb %[bitmask], [%[reg], #0]"
- "\n\t"
- "movs %[dly], #13"
- "\n\t"
- "L%=_last_delay_T1H:"
- "\n\t"
- "sub %[dly], #1"
- "\n\t"
- "bne L%=_last_delay_T1H"
- "\n\t"
- "strb %[bitmask], [%[reg], #4]"
- "\n\t"
- "movs %[dly], #1"
- "\n\t"
- "L%=_last_delay_T1L:"
- "\n\t"
- "sub %[dly], #1"
- "\n\t"
- "bne L%=_last_delay_T1L"
- "\n\t"
- "nop"
- "\n\t"
- "L%=_repeat:"
- "\n\t"
- "add %[p], #1"
- "\n\t"
- "sub %[num], #1"
- "\n\t"
- "bne L%=_begin"
- "\n\t"
- "L%=_done:"
- "\n\t"
- : [p] "+r"(p), [pix] "=&r"(pix), [count] "=&r"(count),
- [dly] "=&r"(dly), [num] "+r"(num)
- : [bitmask] "r"(bitmask), [reg] "r"(reg));
-#else
-#error "Sorry, only 48 MHz is supported, please set Tools > CPU Speed to 48 MHz"
-#endif // F_CPU == 48000000
-
- // Begin of support for nRF52 based boards -------------------------
-
-#elif defined(NRF52) || defined(NRF52_SERIES)
-// [[[Begin of the Neopixel NRF52 EasyDMA implementation
-// by the Hackerspace San Salvador]]]
-// This technique uses the PWM peripheral on the NRF52. The PWM uses the
-// EasyDMA feature included on the chip. This technique loads the duty
-// cycle configuration for each cycle when the PWM is enabled. For this
-// to work we need to store a 16 bit configuration for each bit of the
-// RGB(W) values in the pixel buffer.
-// Comparator values for the PWM were hand picked and are guaranteed to
-// be 100% organic to preserve freshness and high accuracy. Current
-// parameters are:
-// * PWM Clock: 16Mhz
-// * Minimum step time: 62.5ns
-// * Time for zero in high (T0H): 0.31ms
-// * Time for one in high (T1H): 0.75ms
-// * Cycle time: 1.25us
-// * Frequency: 800Khz
-// For 400Khz we just double the calculated times.
-// ---------- BEGIN Constants for the EasyDMA implementation -----------
-// The PWM starts the duty cycle in LOW. To start with HIGH we
-// need to set the 15th bit on each register.
-
-// WS2812 (rev A) timing is 0.35 and 0.7us
-// #define MAGIC_T0H 5UL | (0x8000) // 0.3125us
-// #define MAGIC_T1H 12UL | (0x8000) // 0.75us
-
-// WS2812B (rev B) timing is 0.4 and 0.8 us
-#define MAGIC_T0H 6UL | (0x8000) // 0.375us
-#define MAGIC_T1H 13UL | (0x8000) // 0.8125us
-
-// WS2811 (400 khz) timing is 0.5 and 1.2
-#define MAGIC_T0H_400KHz 8UL | (0x8000) // 0.5us
-#define MAGIC_T1H_400KHz 19UL | (0x8000) // 1.1875us
-
-// For 400Khz, we double value of CTOPVAL
-#define CTOPVAL 20UL // 1.25us
-#define CTOPVAL_400KHz 40UL // 2.5us
-
-// ---------- END Constants for the EasyDMA implementation -------------
-//
-// If there is no device available an alternative cycle-counter
-// implementation is tried.
-// The nRF52 runs with a fixed clock of 64Mhz. The alternative
-// implementation is the same as the one used for the Teensy 3.0/1/2 but
-// with the Nordic SDK HAL & registers syntax.
-// The number of cycles was hand picked and is guaranteed to be 100%
-// organic to preserve freshness and high accuracy.
-// ---------- BEGIN Constants for cycle counter implementation ---------
-#define CYCLES_800_T0H 18 // ~0.36 uS
-#define CYCLES_800_T1H 41 // ~0.76 uS
-#define CYCLES_800 71 // ~1.25 uS
-
-#define CYCLES_400_T0H 26 // ~0.50 uS
-#define CYCLES_400_T1H 70 // ~1.26 uS
-#define CYCLES_400 156 // ~2.50 uS
- // ---------- END of Constants for cycle counter implementation --------
-
- // To support both the SoftDevice + Neopixels we use the EasyDMA
- // feature from the NRF25. However this technique implies to
- // generate a pattern and store it on the memory. The actual
- // memory used in bytes corresponds to the following formula:
- // totalMem = numBytes*8*2+(2*2)
- // The two additional bytes at the end are needed to reset the
- // sequence.
- //
- // If there is not enough memory, we will fall back to cycle counter
- // using DWT
- uint32_t pattern_size =
- numBytes * 8 * sizeof(uint16_t) + 2 * sizeof(uint16_t);
- uint16_t *pixels_pattern = NULL;
-
- NRF_PWM_Type *pwm = NULL;
-
- // Try to find a free PWM device, which is not enabled
- // and has no connected pins
- NRF_PWM_Type *PWM[] = {NRF_PWM0, NRF_PWM1, NRF_PWM2
-#if defined(NRF_PWM3)
- ,
- NRF_PWM3
-#endif
- };
-
- for (unsigned int device = 0; device < (sizeof(PWM) / sizeof(PWM[0]));
- device++) {
- if ((PWM[device]->ENABLE == 0) &&
- (PWM[device]->PSEL.OUT[0] & PWM_PSEL_OUT_CONNECT_Msk) &&
- (PWM[device]->PSEL.OUT[1] & PWM_PSEL_OUT_CONNECT_Msk) &&
- (PWM[device]->PSEL.OUT[2] & PWM_PSEL_OUT_CONNECT_Msk) &&
- (PWM[device]->PSEL.OUT[3] & PWM_PSEL_OUT_CONNECT_Msk)) {
- pwm = PWM[device];
- break;
- }
- }
-
- // only malloc if there is PWM device available
- if (pwm != NULL) {
-#if defined(ARDUINO_NRF52_ADAFRUIT) // use thread-safe malloc
- pixels_pattern = (uint16_t *)rtos_malloc(pattern_size);
-#else
- pixels_pattern = (uint16_t *)malloc(pattern_size);
-#endif
- }
-
- // Use the identified device to choose the implementation
- // If a PWM device is available use DMA
- if ((pixels_pattern != NULL) && (pwm != NULL)) {
- uint16_t pos = 0; // bit position
-
- for (uint16_t n = 0; n < numBytes; n++) {
- uint8_t pix = pixels[n];
-
- for (uint8_t mask = 0x80; mask > 0; mask >>= 1) {
-#if defined(NEO_KHZ400)
- if (!is800KHz) {
- pixels_pattern[pos] =
- (pix & mask) ? MAGIC_T1H_400KHz : MAGIC_T0H_400KHz;
- } else
-#endif
- {
- pixels_pattern[pos] = (pix & mask) ? MAGIC_T1H : MAGIC_T0H;
- }
-
- pos++;
- }
- }
-
- // Zero padding to indicate the end of que sequence
- pixels_pattern[pos++] = 0 | (0x8000); // Seq end
- pixels_pattern[pos++] = 0 | (0x8000); // Seq end
-
- // Set the wave mode to count UP
- pwm->MODE = (PWM_MODE_UPDOWN_Up << PWM_MODE_UPDOWN_Pos);
-
- // Set the PWM to use the 16MHz clock
- pwm->PRESCALER =
- (PWM_PRESCALER_PRESCALER_DIV_1 << PWM_PRESCALER_PRESCALER_Pos);
-
- // Setting of the maximum count
- // but keeping it on 16Mhz allows for more granularity just
- // in case someone wants to do more fine-tuning of the timing.
-#if defined(NEO_KHZ400)
- if (!is800KHz) {
- pwm->COUNTERTOP = (CTOPVAL_400KHz << PWM_COUNTERTOP_COUNTERTOP_Pos);
- } else
-#endif
- {
- pwm->COUNTERTOP = (CTOPVAL << PWM_COUNTERTOP_COUNTERTOP_Pos);
- }
-
- // Disable loops, we want the sequence to repeat only once
- pwm->LOOP = (PWM_LOOP_CNT_Disabled << PWM_LOOP_CNT_Pos);
-
- // On the "Common" setting the PWM uses the same pattern for the
- // for supported sequences. The pattern is stored on half-word
- // of 16bits
- pwm->DECODER = (PWM_DECODER_LOAD_Common << PWM_DECODER_LOAD_Pos) |
- (PWM_DECODER_MODE_RefreshCount << PWM_DECODER_MODE_Pos);
-
- // Pointer to the memory storing the patter
- pwm->SEQ[0].PTR = (uint32_t)(pixels_pattern) << PWM_SEQ_PTR_PTR_Pos;
-
- // Calculation of the number of steps loaded from memory.
- pwm->SEQ[0].CNT = (pattern_size / sizeof(uint16_t))
- << PWM_SEQ_CNT_CNT_Pos;
-
- // The following settings are ignored with the current config.
- pwm->SEQ[0].REFRESH = 0;
- pwm->SEQ[0].ENDDELAY = 0;
-
- // The Neopixel implementation is a blocking algorithm. DMA
- // allows for non-blocking operation. To "simulate" a blocking
- // operation we enable the interruption for the end of sequence
- // and block the execution thread until the event flag is set by
- // the peripheral.
- // pwm->INTEN |= (PWM_INTEN_SEQEND0_Enabled<<PWM_INTEN_SEQEND0_Pos);
-
-// PSEL must be configured before enabling PWM
-#if defined(ARDUINO_ARCH_NRF52840)
- pwm->PSEL.OUT[0] = g_APinDescription[pin].name;
-#else
- pwm->PSEL.OUT[0] = g_ADigitalPinMap[pin];
-#endif
-
- // Enable the PWM
- pwm->ENABLE = 1;
-
- // After all of this and many hours of reading the documentation
- // we are ready to start the sequence...
- pwm->EVENTS_SEQEND[0] = 0;
- pwm->TASKS_SEQSTART[0] = 1;
-
- // But we have to wait for the flag to be set.
- while (!pwm->EVENTS_SEQEND[0]) {
-#if defined(ARDUINO_NRF52_ADAFRUIT) || defined(ARDUINO_ARCH_NRF52840)
- yield();
-#endif
- }
-
- // Before leave we clear the flag for the event.
- pwm->EVENTS_SEQEND[0] = 0;
-
- // We need to disable the device and disconnect
- // all the outputs before leave or the device will not
- // be selected on the next call.
- // TODO: Check if disabling the device causes performance issues.
- pwm->ENABLE = 0;
-
- pwm->PSEL.OUT[0] = 0xFFFFFFFFUL;
-
-#if defined(ARDUINO_NRF52_ADAFRUIT) // use thread-safe free
- rtos_free(pixels_pattern);
-#else
- free(pixels_pattern);
-#endif
- } // End of DMA implementation
- // ---------------------------------------------------------------------
- else {
-#ifndef ARDUINO_ARCH_NRF52840
-// Fall back to DWT
-#if defined(ARDUINO_NRF52_ADAFRUIT)
- // Bluefruit Feather 52 uses freeRTOS
- // Critical Section is used since it does not block SoftDevice execution
- taskENTER_CRITICAL();
-#elif defined(NRF52_DISABLE_INT)
- // If you are using the Bluetooth SoftDevice we advise you to not
- // disable the interrupts. Disabling the interrupts even for short
- // periods of time causes the SoftDevice to stop working. Disable the
- // interrupts only in cases where you need high performance for the LEDs
- // and if you are not using the EasyDMA feature.
- __disable_irq();
-#endif
-
- NRF_GPIO_Type *nrf_port = (NRF_GPIO_Type *)digitalPinToPort(pin);
- uint32_t pinMask = digitalPinToBitMask(pin);
-
- uint32_t CYCLES_X00 = CYCLES_800;
- uint32_t CYCLES_X00_T1H = CYCLES_800_T1H;
- uint32_t CYCLES_X00_T0H = CYCLES_800_T0H;
-
-#if defined(NEO_KHZ400)
- if (!is800KHz) {
- CYCLES_X00 = CYCLES_400;
- CYCLES_X00_T1H = CYCLES_400_T1H;
- CYCLES_X00_T0H = CYCLES_400_T0H;
- }
-#endif
-
- // Enable DWT in debug core
- CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
- DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
-
- // Tries to re-send the frame if is interrupted by the SoftDevice.
- while (1) {
- uint8_t *p = pixels;
-
- uint32_t cycStart = DWT->CYCCNT;
- uint32_t cyc = 0;
-
- for (uint16_t n = 0; n < numBytes; n++) {
- uint8_t pix = *p++;
-
- for (uint8_t mask = 0x80; mask; mask >>= 1) {
- while (DWT->CYCCNT - cyc < CYCLES_X00)
- ;
- cyc = DWT->CYCCNT;
-
- nrf_port->OUTSET |= pinMask;
-
- if (pix & mask) {
- while (DWT->CYCCNT - cyc < CYCLES_X00_T1H)
- ;
- } else {
- while (DWT->CYCCNT - cyc < CYCLES_X00_T0H)
- ;
- }
-
- nrf_port->OUTCLR |= pinMask;
- }
- }
- while (DWT->CYCCNT - cyc < CYCLES_X00)
- ;
-
- // If total time longer than 25%, resend the whole data.
- // Since we are likely to be interrupted by SoftDevice
- if ((DWT->CYCCNT - cycStart) <
- (8 * numBytes * ((CYCLES_X00 * 5) / 4))) {
- break;
- }
-
- // re-send need 300us delay
- delayMicroseconds(300);
- }
-
-// Enable interrupts again
-#if defined(ARDUINO_NRF52_ADAFRUIT)
- taskEXIT_CRITICAL();
-#elif defined(NRF52_DISABLE_INT)
- __enable_irq();
-#endif
-#endif
- }
- // END of NRF52 implementation
-
-#elif defined(__SAMD21E17A__) || defined(__SAMD21G18A__) || \
- defined(__SAMD21E18A__) || defined(__SAMD21J18A__) || \
- defined(__SAMD11C14A__) || defined(__SAMD21G17A__)
- // Arduino Zero, Gemma/Trinket M0, SODAQ Autonomo
- // and others
- // Tried this with a timer/counter, couldn't quite get adequate
- // resolution. So yay, you get a load of goofball NOPs...
-
- uint8_t *ptr, *end, p, bitMask, portNum;
- uint32_t pinMask;
-
- portNum = g_APinDescription[pin].ulPort;
- pinMask = 1ul << g_APinDescription[pin].ulPin;
- ptr = pixels;
- end = ptr + numBytes;
- p = *ptr++;
- bitMask = 0x80;
-
- volatile uint32_t *set = &(PORT->Group[portNum].OUTSET.reg),
- *clr = &(PORT->Group[portNum].OUTCLR.reg);
-
-#if defined(NEO_KHZ400) // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
- for (;;) {
- *set = pinMask;
- asm("nop; nop; nop; nop; nop; nop; nop; nop;");
- if (p & bitMask) {
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop;");
- *clr = pinMask;
- } else {
- *clr = pinMask;
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop;");
- }
- if (bitMask >>= 1) {
- asm("nop; nop; nop; nop; nop; nop; nop; nop; nop;");
- } else {
- if (ptr >= end)
- break;
- p = *ptr++;
- bitMask = 0x80;
- }
- }
-#if defined(NEO_KHZ400)
- } else { // 400 KHz bitstream
- for (;;) {
- *set = pinMask;
- asm("nop; nop; nop; nop; nop; nop; nop; nop; nop; nop; nop;");
- if (p & bitMask) {
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop;");
- *clr = pinMask;
- } else {
- *clr = pinMask;
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop;");
- }
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;");
- if (bitMask >>= 1) {
- asm("nop; nop; nop; nop; nop; nop; nop;");
- } else {
- if (ptr >= end)
- break;
- p = *ptr++;
- bitMask = 0x80;
- }
- }
- }
-#endif
-
-//----
-#elif defined(XMC1100_XMC2GO) || defined(XMC1400_XMC2GO) || \
- defined(XMC1400_Arduino_Kit) || defined(XMC1100_H_BRIDGE2GO) || \
- defined(XMC1100_Boot_Kit) || defined(XMC1300_Boot_Kit)
-
- // XMC1100/1200/1300 with ARM Cortex M0 are running with 32MHz, XMC1400 runs
- // with 48MHz so may not work Tried this with a timer/counter, couldn't
- // quite get adequate resolution. So yay, you get a load of goofball
- // NOPs...
-
- uint8_t *ptr, *end, p, bitMask, portNum;
- uint32_t pinMask;
-
- ptr = pixels;
- end = ptr + numBytes;
- p = *ptr++;
- bitMask = 0x80;
-
- XMC_GPIO_PORT_t *XMC_port = mapping_port_pin[pin].port;
- uint8_t XMC_pin = mapping_port_pin[pin].pin;
-
- uint32_t omrhigh = (uint32_t)XMC_GPIO_OUTPUT_LEVEL_HIGH << XMC_pin;
- uint32_t omrlow = (uint32_t)XMC_GPIO_OUTPUT_LEVEL_LOW << XMC_pin;
-
-#ifdef NEO_KHZ400 // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
- for (;;) {
- XMC_port->OMR = omrhigh;
- asm("nop; nop; nop; nop;");
- if (p & bitMask) {
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop;");
- XMC_port->OMR = omrlow;
- } else {
- XMC_port->OMR = omrlow;
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop;");
- }
- if (bitMask >>= 1) {
- asm("nop; nop; nop; nop; nop;");
- } else {
- if (ptr >= end)
- break;
- p = *ptr++;
- bitMask = 0x80;
- }
- }
-#ifdef NEO_KHZ400 // untested code
- } else { // 400 KHz bitstream
- for (;;) {
- XMC_port->OMR = omrhigh;
- asm("nop; nop; nop; nop; nop;");
- if (p & bitMask) {
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop;");
- XMC_port->OMR = omrlow;
- } else {
- XMC_port->OMR = omrlow;
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop;");
- }
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;");
- if (bitMask >>= 1) {
- asm("nop; nop; nop;");
- } else {
- if (ptr >= end)
- break;
- p = *ptr++;
- bitMask = 0x80;
- }
- }
- }
-
-#endif
-//----
-
-//----
-#elif defined(XMC4700_Relax_Kit) || defined(XMC4800_Relax_Kit)
-
- // XMC4700 and XMC4800 with ARM Cortex M4 are running with 144MHz
- // Tried this with a timer/counter, couldn't quite get adequate
- // resolution. So yay, you get a load of goofball NOPs...
-
- uint8_t *ptr, *end, p, bitMask, portNum;
- uint32_t pinMask;
-
- ptr = pixels;
- end = ptr + numBytes;
- p = *ptr++;
- bitMask = 0x80;
-
- XMC_GPIO_PORT_t *XMC_port = mapping_port_pin[pin].port;
- uint8_t XMC_pin = mapping_port_pin[pin].pin;
-
- uint32_t omrhigh = (uint32_t)XMC_GPIO_OUTPUT_LEVEL_HIGH << XMC_pin;
- uint32_t omrlow = (uint32_t)XMC_GPIO_OUTPUT_LEVEL_LOW << XMC_pin;
-
-#ifdef NEO_KHZ400 // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
-
- for (;;) {
- XMC_port->OMR = omrhigh;
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop;");
- if (p & bitMask) {
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;");
- XMC_port->OMR = omrlow;
- } else {
- XMC_port->OMR = omrlow;
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;");
- }
- if (bitMask >>= 1) {
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;");
- } else {
- if (ptr >= end)
- break;
- p = *ptr++;
- bitMask = 0x80;
- }
- }
-
-#ifdef NEO_KHZ400
- } else { // 400 KHz bitstream
- // ToDo!
- }
-#endif
- //----
-
-#elif defined(__SAMD51__) // M4
-
- uint8_t *ptr, *end, p, bitMask, portNum;
- uint32_t pinMask;
-
- portNum = g_APinDescription[pin].ulPort;
- pinMask = 1ul << g_APinDescription[pin].ulPin;
- ptr = pixels;
- end = ptr + numBytes;
- p = *ptr++;
- bitMask = 0x80;
-
- volatile uint32_t *set = &(PORT->Group[portNum].OUTSET.reg),
- *clr = &(PORT->Group[portNum].OUTCLR.reg);
-
- // SAMD51 overclock-compatible timing is only a mild abomination.
- // It uses SysTick for a consistent clock reference regardless of
- // optimization / cache settings. That's the good news. The bad news,
- // since SysTick->VAL is a volatile type it's slow to access...and then,
- // with the SysTick interval that Arduino sets up (1 ms), this would
- // require a subtract and MOD operation for gauging elapsed time, and
- // all taken in combination that lacks adequate temporal resolution
- // for NeoPixel timing. So a kind of horrible thing is done here...
- // since interrupts are turned off anyway and it's generally accepted
- // by now that we're gonna lose track of time in the NeoPixel lib,
- // the SysTick timer is reconfigured for a period matching the NeoPixel
- // bit timing (either 800 or 400 KHz) and we watch SysTick->VAL very
- // closely (just a threshold, no subtract or MOD or anything) and that
- // seems to work just well enough. When finished, the SysTick
- // peripheral is set back to its original state.
-
- uint32_t t0, t1, top, ticks, saveLoad = SysTick->LOAD,
- saveVal = SysTick->VAL;
-
-#if defined(NEO_KHZ400) // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
- top = (uint32_t)(F_CPU * 0.00000125); // Bit hi + lo = 1.25 uS
- t0 = top - (uint32_t)(F_CPU * 0.00000040); // 0 = 0.4 uS hi
- t1 = top - (uint32_t)(F_CPU * 0.00000080); // 1 = 0.8 uS hi
-#if defined(NEO_KHZ400)
- } else { // 400 KHz bitstream
- top = (uint32_t)(F_CPU * 0.00000250); // Bit hi + lo = 2.5 uS
- t0 = top - (uint32_t)(F_CPU * 0.00000050); // 0 = 0.5 uS hi
- t1 = top - (uint32_t)(F_CPU * 0.00000120); // 1 = 1.2 uS hi
- }
-#endif
-
- SysTick->LOAD = top; // Config SysTick for NeoPixel bit freq
- SysTick->VAL = top; // Set to start value (counts down)
- (void)SysTick->VAL; // Dummy read helps sync up 1st bit
-
- for (;;) {
- *set = pinMask; // Set output high
- ticks = (p & bitMask) ? t1 : t0; // SysTick threshold,
- while (SysTick->VAL > ticks)
- ; // wait for it
- *clr = pinMask; // Set output low
- if (!(bitMask >>= 1)) { // Next bit for this byte...done?
- if (ptr >= end)
- break; // If last byte sent, exit loop
- p = *ptr++; // Fetch next byte
- bitMask = 0x80; // Reset bitmask
- }
- while (SysTick->VAL <= ticks)
- ; // Wait for rollover to 'top'
- }
-
- SysTick->LOAD = saveLoad; // Restore SysTick rollover to 1 ms
- SysTick->VAL = saveVal; // Restore SysTick value
-
-#elif defined(ARDUINO_STM32_FEATHER) // FEATHER WICED (120MHz)
-
- // Tried this with a timer/counter, couldn't quite get adequate
- // resolution. So yay, you get a load of goofball NOPs...
-
- uint8_t *ptr, *end, p, bitMask;
- uint32_t pinMask;
-
- pinMask = BIT(PIN_MAP[pin].gpio_bit);
- ptr = pixels;
- end = ptr + numBytes;
- p = *ptr++;
- bitMask = 0x80;
-
- volatile uint16_t *set = &(PIN_MAP[pin].gpio_device->regs->BSRRL);
- volatile uint16_t *clr = &(PIN_MAP[pin].gpio_device->regs->BSRRH);
-
-#if defined(NEO_KHZ400) // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
- for (;;) {
- if (p & bitMask) { // ONE
- // High 800ns
- *set = pinMask;
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop;");
- // Low 450ns
- *clr = pinMask;
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop;");
- } else { // ZERO
- // High 400ns
- *set = pinMask;
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop;");
- // Low 850ns
- *clr = pinMask;
- asm("nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop; nop; nop; nop; nop;"
- "nop; nop; nop; nop;");
- }
- if (bitMask >>= 1) {
- // Move on to the next pixel
- asm("nop;");
- } else {
- if (ptr >= end)
- break;
- p = *ptr++;
- bitMask = 0x80;
- }
- }
-#if defined(NEO_KHZ400)
- } else { // 400 KHz bitstream
- // ToDo!
- }
-#endif
-
-#elif defined(TARGET_LPC1768)
- uint8_t *ptr, *end, p, bitMask;
- ptr = pixels;
- end = ptr + numBytes;
- p = *ptr++;
- bitMask = 0x80;
-
-#if defined(NEO_KHZ400) // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
- for (;;) {
- if (p & bitMask) {
- // data ONE high
- // min: 550 typ: 700 max: 5,500
- gpio_set(pin);
- time::delay_ns(550);
- // min: 450 typ: 600 max: 5,000
- gpio_clear(pin);
- time::delay_ns(450);
- } else {
- // data ZERO high
- // min: 200 typ: 350 max: 500
- gpio_set(pin);
- time::delay_ns(200);
- // data low
- // min: 450 typ: 600 max: 5,000
- gpio_clear(pin);
- time::delay_ns(450);
- }
- if (bitMask >>= 1) {
- // Move on to the next pixel
- asm("nop;");
- } else {
- if (ptr >= end)
- break;
- p = *ptr++;
- bitMask = 0x80;
- }
- }
-#if defined(NEO_KHZ400)
- } else { // 400 KHz bitstream
- // ToDo!
- }
-#endif
-#elif defined(ARDUINO_ARCH_STM32) || \
- defined(ARDUINO_ARCH_ARDUINO_CORE_STM32) || defined(_PY32_DEF_)
- uint8_t *p = pixels, *end = p + numBytes, pix = *p++, mask = 0x80;
- uint32_t cyc;
- uint32_t saveLoad = SysTick->LOAD, saveVal = SysTick->VAL;
-#if defined(NEO_KHZ400) // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
- uint32_t top = (F_CPU / 800000); // 1.25µs
- uint32_t t0 = top - (F_CPU / 2500000); // 0.4µs
- uint32_t t1 = top - (F_CPU / 1250000); // 0.8µs
- SysTick->LOAD = top - 1; // Config SysTick for NeoPixel bit freq
- SysTick->VAL = 0; // Set to start value
- for (;;) {
- LL_GPIO_SetOutputPin(gpioPort, gpioPin);
- cyc = (pix & mask) ? t1 : t0;
- while (SysTick->VAL > cyc)
- ;
- LL_GPIO_ResetOutputPin(gpioPort, gpioPin);
- if (!(mask >>= 1)) {
- if (p >= end)
- break;
- pix = *p++;
- mask = 0x80;
- }
- while (SysTick->VAL <= cyc)
- ;
- }
-#if defined(NEO_KHZ400)
- } else { // 400 kHz bitstream
- uint32_t top = (F_CPU / 400000); // 2.5µs
- uint32_t t0 = top - (F_CPU / 2000000); // 0.5µs
- uint32_t t1 = top - (F_CPU / 833333); // 1.2µs
- SysTick->LOAD = top - 1; // Config SysTick for NeoPixel bit freq
- SysTick->VAL = 0; // Set to start value
- for (;;) {
- LL_GPIO_SetOutputPin(gpioPort, gpioPin);
- cyc = (pix & mask) ? t1 : t0;
- while (SysTick->VAL > cyc)
- ;
- LL_GPIO_ResetOutputPin(gpioPort, gpioPin);
- if (!(mask >>= 1)) {
- if (p >= end)
- break;
- pix = *p++;
- mask = 0x80;
- }
- while (SysTick->VAL <= cyc)
- ;
- }
- }
-#endif // NEO_KHZ400
- SysTick->LOAD = saveLoad; // Restore SysTick rollover to 1 ms
- SysTick->VAL = saveVal; // Restore SysTick value
-#elif defined(NRF51)
- uint8_t *p = pixels, pix, count, mask;
- int32_t num = numBytes;
- unsigned int bitmask = (1 << g_ADigitalPinMap[pin]);
- // https://github.com/sandeepmistry/arduino-nRF5/blob/dc53980c8bac27898fca90d8ecb268e11111edc1/variants/BBCmicrobit/variant.cpp
-
- // volatile unsigned int *reg = (unsigned int *)(0x50000000UL + 0x508);
- volatile uint32_t *reg =
- (uint32_t *)(NRF_GPIO_BASE + offsetof(NRF_GPIO_Type, OUTSET));
-
- // https://github.com/sandeepmistry/arduino-nRF5/blob/dc53980c8bac27898fca90d8ecb268e11111edc1/cores/nRF5/SDK/components/device/nrf51.h
- // http://www.iot-programmer.com/index.php/books/27-micro-bit-iot-in-c/chapters-micro-bit-iot-in-c/47-micro-bit-iot-in-c-fast-memory-mapped-gpio?showall=1
- // https://github.com/Microsoft/pxt-neopixel/blob/master/sendbuffer.asm
-
- asm volatile(
- // "cpsid i" ; disable irq
-
- // b .start
- "b L%=_start"
- "\n\t"
- // .nextbit: ; C0
- "L%=_nextbit:"
- "\n\t" //; C0
- // str r1, [r3, #0] ; pin := hi C2
- "str %[bitmask], [%[reg], #0]"
- "\n\t" //; pin := hi C2
- // tst r6, r0 ; C3
- "tst %[mask], %[pix]"
- "\n\t" // ; C3
- // bne .islate ; C4
- "bne L%=_islate"
- "\n\t" //; C4
- // str r1, [r2, #0] ; pin := lo C6
- "str %[bitmask], [%[reg], #4]"
- "\n\t" //; pin := lo C6
- // .islate:
- "L%=_islate:"
- "\n\t"
- // lsrs r6, r6, #1 ; r6 >>= 1 C7
- "lsr %[mask], %[mask], #1"
- "\n\t" //; r6 >>= 1 C7
- // bne .justbit ; C8
- "bne L%=_justbit"
- "\n\t" //; C8
-
- // ; not just a bit - need new byte
- // adds r4, #1 ; r4++ C9
- "add %[p], #1"
- "\n\t" //; r4++ C9
- // subs r5, #1 ; r5-- C10
- "sub %[num], #1"
- "\n\t" //; r5-- C10
- // bcc .stop ; if (r5<0) goto .stop C11
- "bcc L%=_stop"
- "\n\t" //; if (r5<0) goto .stop C11
- // .start:
- "L%=_start:"
- // movs r6, #0x80 ; reset mask C12
- "movs %[mask], #0x80"
- "\n\t" //; reset mask C12
- // nop ; C13
- "nop"
- "\n\t" //; C13
-
- // .common: ; C13
- "L%=_common:"
- "\n\t" //; C13
- // str r1, [r2, #0] ; pin := lo C15
- "str %[bitmask], [%[reg], #4]"
- "\n\t" //; pin := lo C15
- // ; always re-load byte - it just fits with the cycles better this
- // way ldrb r0, [r4, #0] ; r0 := *r4 C17
- "ldrb %[pix], [%[p], #0]"
- "\n\t" //; r0 := *r4 C17
- // b .nextbit ; C20
- "b L%=_nextbit"
- "\n\t" //; C20
-
- // .justbit: ; C10
- "L%=_justbit:"
- "\n\t" //; C10
- // ; no nops, branch taken is already 3 cycles
- // b .common ; C13
- "b L%=_common"
- "\n\t" //; C13
-
- // .stop:
- "L%=_stop:"
- "\n\t"
- // str r1, [r2, #0] ; pin := lo
- "str %[bitmask], [%[reg], #4]"
- "\n\t" //; pin := lo
- // cpsie i ; enable irq
-
- : [p] "+r"(p), [pix] "=&r"(pix), [count] "=&r"(count),
- [mask] "=&r"(mask), [num] "+r"(num)
- : [bitmask] "r"(bitmask), [reg] "r"(reg));
-
-#elif defined(__SAM3X8E__) // Arduino Due
-
-#define SCALE VARIANT_MCK / 2UL / 1000000UL
-#define INST (2UL * F_CPU / VARIANT_MCK)
-#define TIME_800_0 ((int)(0.40 * SCALE + 0.5) - (5 * INST))
-#define TIME_800_1 ((int)(0.80 * SCALE + 0.5) - (5 * INST))
-#define PERIOD_800 ((int)(1.25 * SCALE + 0.5) - (5 * INST))
-#define TIME_400_0 ((int)(0.50 * SCALE + 0.5) - (5 * INST))
-#define TIME_400_1 ((int)(1.20 * SCALE + 0.5) - (5 * INST))
-#define PERIOD_400 ((int)(2.50 * SCALE + 0.5) - (5 * INST))
-
- int pinMask, time0, time1, period, t;
- Pio *port;
- volatile WoReg *portSet, *portClear, *timeValue, *timeReset;
- uint8_t *p, *end, pix, mask;
-
- pmc_set_writeprotect(false);
- pmc_enable_periph_clk((uint32_t)TC3_IRQn);
- TC_Configure(TC1, 0,
- TC_CMR_WAVE | TC_CMR_WAVSEL_UP | TC_CMR_TCCLKS_TIMER_CLOCK1);
- TC_Start(TC1, 0);
-
- pinMask = g_APinDescription[pin].ulPin; // Don't 'optimize' these into
- port = g_APinDescription[pin].pPort; // declarations above. Want to
- portSet = &(port->PIO_SODR); // burn a few cycles after
- portClear = &(port->PIO_CODR); // starting timer to minimize
- timeValue = &(TC1->TC_CHANNEL[0].TC_CV); // the initial 'while'.
- timeReset = &(TC1->TC_CHANNEL[0].TC_CCR);
- p = pixels;
- end = p + numBytes;
- pix = *p++;
- mask = 0x80;
-
-#if defined(NEO_KHZ400) // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
- time0 = TIME_800_0;
- time1 = TIME_800_1;
- period = PERIOD_800;
-#if defined(NEO_KHZ400)
- } else { // 400 KHz bitstream
- time0 = TIME_400_0;
- time1 = TIME_400_1;
- period = PERIOD_400;
- }
-#endif
-
- for (t = time0;; t = time0) {
- if (pix & mask)
- t = time1;
- while (*timeValue < (unsigned)period)
- ;
- *portSet = pinMask;
- *timeReset = TC_CCR_CLKEN | TC_CCR_SWTRG;
- while (*timeValue < (unsigned)t)
- ;
- *portClear = pinMask;
- if (!(mask >>= 1)) { // This 'inside-out' loop logic utilizes
- if (p >= end)
- break; // idle time to minimize inter-byte delays.
- pix = *p++;
- mask = 0x80;
- }
- }
- while (*timeValue < (unsigned)period)
- ; // Wait for last bit
- TC_Stop(TC1, 0);
-
-// RENESAS including Arduino UNO R4 + STM32H7 Arduino Portenta H7 (Dual Core
-// M7+M4) / Arduino Giga R1
-#elif defined(ARDUINO_ARCH_RENESAS) || defined(ARDUINO_ARCH_RENESAS_UNO) || \
- defined(ARDUINO_ARCH_RENESAS_PORTENTA) || \
- defined(ARDUINO_ARCH_MBED_PORTENTA) || defined(ARDUINO_ARCH_MBED_GIGA)
-
-// Definition for a single channel clockless controller for RA4M1 (Cortex M4)
-// See clockless.h for detailed info on how the template parameters are used.
-#define ARM_DEMCR \
- (*(volatile uint32_t *)0xE000EDFC) // Debug Exception and Monitor Control
-#define ARM_DEMCR_TRCENA (1 << 24) // Enable debugging & monitoring blocks
-#define ARM_DWT_CTRL (*(volatile uint32_t *)0xE0001000) // DWT control register
-#define ARM_DWT_CTRL_CYCCNTENA (1 << 0) // Enable cycle count
-#define ARM_DWT_CYCCNT \
- (*(volatile uint32_t *)0xE0001004) // Cycle count register
-
-#if defined(ARDUINO_PORTENTA_H7_M7) || \
- (defined(ARDUINO_ARCH_MBED_GIGA) && defined(TARGET_M7))
-#define F_CPU 480000000
-#elif defined(ARDUINO_PORTENTA_H7_M4) || \
- (defined(ARDUINO_ARCH_MBED_GIGA) && defined(TARGET_M4))
-#define F_CPU 240000000
-#else
-#define F_CPU 48000000
-#endif
-#define CYCLES_800_T0H (F_CPU / 4000000)
-#define CYCLES_800_T1H (F_CPU / 1250000)
-#define CYCLES_800 (F_CPU / 800000)
-#define CYCLES_400_T0H (F_CPU / 2000000)
-#define CYCLES_400_T1H (F_CPU / 833333)
-#define CYCLES_400 (F_CPU / 400000)
-
- uint8_t *p = pixels, *end = p + numBytes, pix, mask;
-
-// --- Platform-specific Pin Setup ---
-#if defined(ARDUINO_ARCH_MBED_PORTENTA) || defined(ARDUINO_ARCH_MBED_GIGA)
- // Convert the Arduino pin number to an mbed PinName.
- mbed::DigitalOut dout(digitalPinToPinName(pin));
-#else
- bsp_io_port_pin_t io_pin = g_pin_cfg[pin].pin;
-// Macro to calculate the port base address for the given pin
-#define PIN_IO_PORT_ADDR(pn) \
- (R_PORT0 + ((uint32_t)(R_PORT1 - R_PORT0) * ((pn) >> 8u)))
-
- volatile uint16_t *set = &(PIN_IO_PORT_ADDR(io_pin)->POSR);
- volatile uint16_t *clr = &(PIN_IO_PORT_ADDR(io_pin)->PORR);
- uint16_t msk = (1U << (io_pin & 0xFF));
-#endif
-
- uint32_t cyc;
-
- // Enable the cycle counter: ARM registers for precise timing.
- ARM_DEMCR |= ARM_DEMCR_TRCENA;
- ARM_DWT_CTRL |= ARM_DWT_CTRL_CYCCNTENA;
-
-#if defined(NEO_KHZ400) // 800 KHz check needed only if 400 KHz support enabled
- if (is800KHz) {
-#endif
- cyc = ARM_DWT_CYCCNT + CYCLES_800;
- while (p < end) {
- pix = *p++;
- for (mask = 0x80; mask; mask >>= 1) {
- // Wait until the beginning of the next bit period.
- while (ARM_DWT_CYCCNT - cyc < CYCLES_800)
- ;
- cyc = ARM_DWT_CYCCNT;
- // Set the pin high:
-#if defined(ARDUINO_ARCH_MBED_PORTENTA) || defined(ARDUINO_ARCH_MBED_GIGA)
- dout = 1;
-#else
- *set = msk;
-#endif
- // Keep the pin high for T1H or T0H depending on the data bit:
- if (pix & mask) {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_800_T1H)
- ;
- } else {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_800_T0H)
- ;
- }
- // Set the pin low:
-#if defined(ARDUINO_ARCH_MBED_PORTENTA) || defined(ARDUINO_ARCH_MBED_GIGA)
- dout = 0;
-#else
- *clr = msk;
-#endif
- }
- }
- // Ensure the final low state lasts the full period.
- while (ARM_DWT_CYCCNT - cyc < CYCLES_800)
- ;
-#if defined(NEO_KHZ400)
- } else { // 400 kHz bitstream
- cyc = ARM_DWT_CYCCNT + CYCLES_400;
- while (p < end) {
- pix = *p++;
- for (mask = 0x80; mask; mask >>= 1) {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_400)
- ;
- cyc = ARM_DWT_CYCCNT;
- // Set the pin high:
-#if defined(ARDUINO_ARCH_MBED_PORTENTA) || defined(ARDUINO_ARCH_MBED_GIGA)
- dout = 1;
-#else
- *set = msk;
-#endif
- if (pix & mask) {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_400_T1H)
- ;
- } else {
- while (ARM_DWT_CYCCNT - cyc < CYCLES_400_T0H)
- ;
- }
- // Set the pin low:
-#if defined(ARDUINO_ARCH_MBED_PORTENTA) || defined(ARDUINO_ARCH_MBED_GIGA)
- dout = 0;
-#else
- *clr = msk;
-#endif
- }
- }
- // Ensure the final low state lasts the full period.
- while (ARM_DWT_CYCCNT - cyc < CYCLES_400)
- ;
- }
-#endif // NEO_KHZ400
-
-#endif // ARM
-
- // END ARM ----------------------------------------------------------------
-
-#elif defined(ESP8266) || defined(ESP32)
-
- // ESP8266 ----------------------------------------------------------------
-
- // ESP8266 show() is external to enforce ICACHE_RAM_ATTR execution
- espShow(pin, pixels, numBytes, is800KHz);
-
-#elif defined(KENDRYTE_K210)
-
- k210Show(pin, pixels, numBytes, is800KHz);
-
-#elif defined(__ARDUINO_ARC__)
-
- // Arduino 101 -----------------------------------------------------------
-
-#define NOPx7 \
- { \
- __builtin_arc_nop(); \
- __builtin_arc_nop(); \
- __builtin_arc_nop(); \
- __builtin_arc_nop(); \
- __builtin_arc_nop(); \
- __builtin_arc_nop(); \
- __builtin_arc_nop(); \
- }
-
- PinDescription *pindesc = &g_APinDescription[pin];
- register uint32_t loop =
- 8 * numBytes; // one loop to handle all bytes and all bits
- register uint8_t *p = pixels;
- register uint32_t currByte = (uint32_t)(*p);
- register uint32_t currBit = 0x80 & currByte;
- register uint32_t bitCounter = 0;
- register uint32_t first = 1;
-
- // The loop is unusual. Very first iteration puts all the way LOW to the
- // wire
- // - constant LOW does not affect NEOPIXEL, so there is no visible effect
- // displayed. During that very first iteration CPU caches instructions in
- // the loop. Because of the caching process, "CPU slows down". NEOPIXEL
- // pulse is very time sensitive that's why we let the CPU cache first and we
- // start regular pulse from 2nd iteration
- if (pindesc->ulGPIOType == SS_GPIO) {
- register uint32_t reg = pindesc->ulGPIOBase + SS_GPIO_SWPORTA_DR;
- uint32_t reg_val = __builtin_arc_lr((volatile uint32_t)reg);
- register uint32_t reg_bit_high = reg_val | (1 << pindesc->ulGPIOId);
- register uint32_t reg_bit_low = reg_val & ~(1 << pindesc->ulGPIOId);
-
- loop += 1; // include first, special iteration
- while (loop--) {
- if (!first) {
- currByte <<= 1;
- bitCounter++;
- }
-
- // 1 is >550ns high and >450ns low; 0 is 200..500ns high and >450ns
- // low
- __builtin_arc_sr(first ? reg_bit_low : reg_bit_high,
- (volatile uint32_t)reg);
- if (currBit) { // ~400ns HIGH (740ns overall)
- NOPx7 NOPx7
- }
- // ~340ns HIGH
- NOPx7 __builtin_arc_nop();
-
- // 820ns LOW; per spec, max allowed low here is 5000ns */
- __builtin_arc_sr(reg_bit_low, (volatile uint32_t)reg);
- NOPx7 NOPx7
-
- if (bitCounter >= 8) {
- bitCounter = 0;
- currByte = (uint32_t)(*++p);
- }
-
- currBit = 0x80 & currByte;
- first = 0;
- }
- } else if (pindesc->ulGPIOType == SOC_GPIO) {
- register uint32_t reg = pindesc->ulGPIOBase + SOC_GPIO_SWPORTA_DR;
- uint32_t reg_val = MMIO_REG_VAL(reg);
- register uint32_t reg_bit_high = reg_val | (1 << pindesc->ulGPIOId);
- register uint32_t reg_bit_low = reg_val & ~(1 << pindesc->ulGPIOId);
-
- loop += 1; // include first, special iteration
- while (loop--) {
- if (!first) {
- currByte <<= 1;
- bitCounter++;
- }
- MMIO_REG_VAL(reg) = first ? reg_bit_low : reg_bit_high;
- if (currBit) { // ~430ns HIGH (740ns overall)
- NOPx7 NOPx7 __builtin_arc_nop();
- }
- // ~310ns HIGH
- NOPx7
-
- // 850ns LOW; per spec, max allowed low here is 5000ns */
- MMIO_REG_VAL(reg) = reg_bit_low;
- NOPx7 NOPx7
-
- if (bitCounter >= 8) {
- bitCounter = 0;
- currByte = (uint32_t)(*++p);
- }
-
- currBit = 0x80 & currByte;
- first = 0;
- }
- }
-
-#elif defined(ARDUINO_ARCH_CH32)
- ch32Show(gpioPort, gpioPin, pixels, numBytes, is800KHz);
-#elif defined(ARDUINO_ARCH_RP2040) && defined(__riscv)
- rp2040Show(pixels, numBytes); // Use PIO
-#else
-#error Architecture not supported
-#endif
-
- // END ARCHITECTURE SELECT ------------------------------------------------
-
-#if !(defined(NRF52) || defined(NRF52_SERIES) || defined(ESP32))
- interrupts();
-#endif
-
- endTime = micros(); // Save EOD time for latch on next call
-}
-
-/*!
- @brief Set/change the NeoPixel output pin number. Previous pin,
- if any, is set to INPUT and the new pin is set to OUTPUT.
- @param p Arduino pin number (-1 = no pin).
-*/
-void Adafruit_NeoPixel::setPin(int16_t p) {
- if (begun && (pin >= 0))
- pinMode(pin, INPUT); // Disable existing out pin
- pin = p;
- if (begun) {
- pinMode(p, OUTPUT);
- digitalWrite(p, LOW);
- }
-#if defined(__AVR__)
- port = portOutputRegister(digitalPinToPort(p));
- pinMask = digitalPinToBitMask(p);
-#endif
-#if defined(ARDUINO_ARCH_STM32) || defined(ARDUINO_ARCH_ARDUINO_CORE_STM32)
- gpioPort = digitalPinToPort(p);
- gpioPin = STM_LL_GPIO_PIN(digitalPinToPinName(p));
-#elif defined(_PY32_DEF_)
- gpioPort = digitalPinToPort(p);
- gpioPin = PY32_LL_GPIO_PIN(digitalPinToPinName(p));
-#elif defined(ARDUINO_ARCH_CH32)
- PinName const pin_name = digitalPinToPinName(pin);
- gpioPort = get_GPIO_Port(CH_PORT(pin_name));
- gpioPin = CH_GPIO_PIN(pin_name);
-#if defined(CH32V20x_D6)
- if (gpioPort == GPIOC &&
- ((*(volatile uint32_t *)0x40022030) & 0x0F000000) == 0) {
- gpioPin = gpioPin >> 13;
- }
-#endif
-#endif
-}
-
-/*!
- @brief Set a pixel's color using separate red, green and blue
- components. If using RGBW pixels, white will be set to 0.
- @param n Pixel index, starting from 0.
- @param r Red brightness, 0 = minimum (off), 255 = maximum.
- @param g Green brightness, 0 = minimum (off), 255 = maximum.
- @param b Blue brightness, 0 = minimum (off), 255 = maximum.
-*/
-void Adafruit_NeoPixel::setPixelColor(uint16_t n, uint8_t r, uint8_t g,
- uint8_t b) {
-
- if (n < numLEDs) {
- if (brightness) { // See notes in setBrightness()
- r = (r * brightness) >> 8;
- g = (g * brightness) >> 8;
- b = (b * brightness) >> 8;
- }
- uint8_t *p;
- if (wOffset == rOffset) { // Is an RGB-type strip
- p = &pixels[n * 3]; // 3 bytes per pixel
- } else { // Is a WRGB-type strip
- p = &pixels[n * 4]; // 4 bytes per pixel
- p[wOffset] = 0; // But only R,G,B passed -- set W to 0
- }
- p[rOffset] = r; // R,G,B always stored
- p[gOffset] = g;
- p[bOffset] = b;
- }
-}
-
-/*!
- @brief Set a pixel's color using separate red, green, blue and white
- components (for RGBW NeoPixels only).
- @param n Pixel index, starting from 0.
- @param r Red brightness, 0 = minimum (off), 255 = maximum.
- @param g Green brightness, 0 = minimum (off), 255 = maximum.
- @param b Blue brightness, 0 = minimum (off), 255 = maximum.
- @param w White brightness, 0 = minimum (off), 255 = maximum, ignored
- if using RGB pixels.
-*/
-void Adafruit_NeoPixel::setPixelColor(uint16_t n, uint8_t r, uint8_t g,
- uint8_t b, uint8_t w) {
-
- if (n < numLEDs) {
- if (brightness) { // See notes in setBrightness()
- r = (r * brightness) >> 8;
- g = (g * brightness) >> 8;
- b = (b * brightness) >> 8;
- w = (w * brightness) >> 8;
- }
- uint8_t *p;
- if (wOffset == rOffset) { // Is an RGB-type strip
- p = &pixels[n * 3]; // 3 bytes per pixel (ignore W)
- } else { // Is a WRGB-type strip
- p = &pixels[n * 4]; // 4 bytes per pixel
- p[wOffset] = w; // Store W
- }
- p[rOffset] = r; // Store R,G,B
- p[gOffset] = g;
- p[bOffset] = b;
- }
-}
-
-/*!
- @brief Set a pixel's color using a 32-bit 'packed' RGB or RGBW value.
- @param n Pixel index, starting from 0.
- @param c 32-bit color value. Most significant byte is white (for RGBW
- pixels) or ignored (for RGB pixels), next is red, then green,
- and least significant byte is blue.
-*/
-void Adafruit_NeoPixel::setPixelColor(uint16_t n, uint32_t c) {
- if (n < numLEDs) {
- uint8_t *p, r = (uint8_t)(c >> 16), g = (uint8_t)(c >> 8),
- b = (uint8_t)c;
- if (brightness) { // See notes in setBrightness()
- r = (r * brightness) >> 8;
- g = (g * brightness) >> 8;
- b = (b * brightness) >> 8;
- }
- if (wOffset == rOffset) {
- p = &pixels[n * 3];
- } else {
- p = &pixels[n * 4];
- uint8_t w = (uint8_t)(c >> 24);
- p[wOffset] = brightness ? ((w * brightness) >> 8) : w;
- }
- p[rOffset] = r;
- p[gOffset] = g;
- p[bOffset] = b;
- }
-}
-
-/*!
- @brief Fill all or part of the NeoPixel strip with a color.
- @param c 32-bit color value. Most significant byte is white (for
- RGBW pixels) or ignored (for RGB pixels), next is red,
- then green, and least significant byte is blue. If all
- arguments are unspecified, this will be 0 (off).
- @param first Index of first pixel to fill, starting from 0. Must be
- in-bounds, no clipping is performed. 0 if unspecified.
- @param count Number of pixels to fill, as a positive value. Passing
- 0 or leaving unspecified will fill to end of strip.
-*/
-void Adafruit_NeoPixel::fill(uint32_t c, uint16_t first, uint16_t count) {
- uint16_t i, end;
-
- if (first >= numLEDs) {
- return; // If first LED is past end of strip, nothing to do
- }
-
- // Calculate the index ONE AFTER the last pixel to fill
- if (count == 0) {
- // Fill to end of strip
- end = numLEDs;
- } else {
- // Ensure that the loop won't go past the last pixel
- end = first + count;
- if (end > numLEDs)
- end = numLEDs;
- }
-
- for (i = first; i < end; i++) {
- this->setPixelColor(i, c);
- }
-}
-
-/*!
- @brief Convert hue, saturation and value into a packed 32-bit RGB color
- that can be passed to setPixelColor() or other RGB-compatible
- functions.
- @param hue An unsigned 16-bit value, 0 to 65535, representing one full
- loop of the color wheel, which allows 16-bit hues to "roll
- over" while still doing the expected thing (and allowing
- more precision than the wheel() function that was common to
- prior NeoPixel examples).
- @param sat Saturation, 8-bit value, 0 (min or pure grayscale) to 255
- (max or pure hue). Default of 255 if unspecified.
- @param val Value (brightness), 8-bit value, 0 (min / black / off) to
- 255 (max or full brightness). Default of 255 if unspecified.
- @return Packed 32-bit RGB with the most significant byte set to 0 -- the
- white element of WRGB pixels is NOT utilized. Result is linearly
- but not perceptually correct, so you may want to pass the result
- through the gamma32() function (or your own gamma-correction
- operation) else colors may appear washed out. This is not done
- automatically by this function because coders may desire a more
- refined gamma-correction function than the simplified
- one-size-fits-all operation of gamma32(). Diffusing the LEDs also
- really seems to help when using low-saturation colors.
-*/
-uint32_t Adafruit_NeoPixel::ColorHSV(uint16_t hue, uint8_t sat, uint8_t val) {
-
- uint8_t r, g, b;
-
- // Remap 0-65535 to 0-1529. Pure red is CENTERED on the 64K rollover;
- // 0 is not the start of pure red, but the midpoint...a few values above
- // zero and a few below 65536 all yield pure red (similarly, 32768 is the
- // midpoint, not start, of pure cyan). The 8-bit RGB hexcone (256 values
- // each for red, green, blue) really only allows for 1530 distinct hues
- // (not 1536, more on that below), but the full unsigned 16-bit type was
- // chosen for hue so that one's code can easily handle a contiguous color
- // wheel by allowing hue to roll over in either direction.
- hue = (hue * 1530L + 32768) / 65536;
- // Because red is centered on the rollover point (the +32768 above,
- // essentially a fixed-point +0.5), the above actually yields 0 to 1530,
- // where 0 and 1530 would yield the same thing. Rather than apply a
- // costly modulo operator, 1530 is handled as a special case below.
-
- // So you'd think that the color "hexcone" (the thing that ramps from
- // pure red, to pure yellow, to pure green and so forth back to red,
- // yielding six slices), and with each color component having 256
- // possible values (0-255), might have 1536 possible items (6*256),
- // but in reality there's 1530. This is because the last element in
- // each 256-element slice is equal to the first element of the next
- // slice, and keeping those in there this would create small
- // discontinuities in the color wheel. So the last element of each
- // slice is dropped...we regard only elements 0-254, with item 255
- // being picked up as element 0 of the next slice. Like this:
- // Red to not-quite-pure-yellow is: 255, 0, 0 to 255, 254, 0
- // Pure yellow to not-quite-pure-green is: 255, 255, 0 to 1, 255, 0
- // Pure green to not-quite-pure-cyan is: 0, 255, 0 to 0, 255, 254
- // and so forth. Hence, 1530 distinct hues (0 to 1529), and hence why
- // the constants below are not the multiples of 256 you might expect.
-
- // Convert hue to R,G,B (nested ifs faster than divide+mod+switch):
- if (hue < 510) { // Red to Green-1
- b = 0;
- if (hue < 255) { // Red to Yellow-1
- r = 255;
- g = hue; // g = 0 to 254
- } else { // Yellow to Green-1
- r = 510 - hue; // r = 255 to 1
- g = 255;
- }
- } else if (hue < 1020) { // Green to Blue-1
- r = 0;
- if (hue < 765) { // Green to Cyan-1
- g = 255;
- b = hue - 510; // b = 0 to 254
- } else { // Cyan to Blue-1
- g = 1020 - hue; // g = 255 to 1
- b = 255;
- }
- } else if (hue < 1530) { // Blue to Red-1
- g = 0;
- if (hue < 1275) { // Blue to Magenta-1
- r = hue - 1020; // r = 0 to 254
- b = 255;
- } else { // Magenta to Red-1
- r = 255;
- b = 1530 - hue; // b = 255 to 1
- }
- } else { // Last 0.5 Red (quicker than % operator)
- r = 255;
- g = b = 0;
- }
-
- // Apply saturation and value to R,G,B, pack into 32-bit result:
- uint32_t v1 = 1 + val; // 1 to 256; allows >>8 instead of /255
- uint16_t s1 = 1 + sat; // 1 to 256; same reason
- uint8_t s2 = 255 - sat; // 255 to 0
- return ((((((r * s1) >> 8) + s2) * v1) & 0xff00) << 8) |
- (((((g * s1) >> 8) + s2) * v1) & 0xff00) |
- (((((b * s1) >> 8) + s2) * v1) >> 8);
-}
-
-/*!
- @brief Query the color of a previously-set pixel.
- @param n Index of pixel to read (0 = first).
- @return 'Packed' 32-bit RGB or WRGB value. Most significant byte is white
- (for RGBW pixels) or 0 (for RGB pixels), next is red, then green,
- and least significant byte is blue.
- @note If the strip brightness has been changed from the default value
- of 255, the color read from a pixel may not exactly match what
- was previously written with one of the setPixelColor() functions.
- This gets more pronounced at lower brightness levels.
-*/
-uint32_t Adafruit_NeoPixel::getPixelColor(uint16_t n) const {
- if (n >= numLEDs)
- return 0; // Out of bounds, return no color.
-
- uint8_t *p;
-
- if (wOffset == rOffset) { // Is RGB-type device
- p = &pixels[n * 3];
- if (brightness) {
- // Stored color was decimated by setBrightness(). Returned value
- // attempts to scale back to an approximation of the original 24-bit
- // value used when setting the pixel color, but there will always be
- // some error -- those bits are simply gone. Issue is most
- // pronounced at low brightness levels.
- return (((uint32_t)(p[rOffset] << 8) / brightness) << 16) |
- (((uint32_t)(p[gOffset] << 8) / brightness) << 8) |
- ((uint32_t)(p[bOffset] << 8) / brightness);
- } else {
- // No brightness adjustment has been made -- return 'raw' color
- return ((uint32_t)p[rOffset] << 16) | ((uint32_t)p[gOffset] << 8) |
- (uint32_t)p[bOffset];
- }
- } else { // Is RGBW-type device
- p = &pixels[n * 4];
- if (brightness) { // Return scaled color
- return (((uint32_t)(p[wOffset] << 8) / brightness) << 24) |
- (((uint32_t)(p[rOffset] << 8) / brightness) << 16) |
- (((uint32_t)(p[gOffset] << 8) / brightness) << 8) |
- ((uint32_t)(p[bOffset] << 8) / brightness);
- } else { // Return raw color
- return ((uint32_t)p[wOffset] << 24) | ((uint32_t)p[rOffset] << 16) |
- ((uint32_t)p[gOffset] << 8) | (uint32_t)p[bOffset];
- }
- }
-}
-
-/*!
- @brief Adjust output brightness. Does not immediately affect what's
- currently displayed on the LEDs. The next call to show() will
- refresh the LEDs at this level.
- @param b Brightness setting, 0=minimum (off), 255=brightest.
- @note This was intended for one-time use in one's setup() function,
- not as an animation effect in itself. Because of the way this
- library "pre-multiplies" LED colors in RAM, changing the
- brightness is often a "lossy" operation -- what you write to
- pixels isn't necessary the same as what you'll read back.
- Repeated brightness changes using this function exacerbate the
- problem. Smart programs therefore treat the strip as a
- write-only resource, maintaining their own state to render each
- frame of an animation, not relying on read-modify-write.
-*/
-void Adafruit_NeoPixel::setBrightness(uint8_t b) {
- // Stored brightness value is different than what's passed.
- // This simplifies the actual scaling math later, allowing a fast
- // 8x8-bit multiply and taking the MSB. 'brightness' is a uint8_t,
- // adding 1 here may (intentionally) roll over...so 0 = max brightness
- // (color values are interpreted literally; no scaling), 1 = min
- // brightness (off), 255 = just below max brightness.
- uint8_t newBrightness = b + 1;
- if (newBrightness != brightness) { // Compare against prior value
- // Brightness has changed -- re-scale existing data in RAM,
- // This process is potentially "lossy," especially when increasing
- // brightness. The tight timing in the WS2811/WS2812 code means there
- // aren't enough free cycles to perform this scaling on the fly as data
- // is issued. So we make a pass through the existing color data in RAM
- // and scale it (subsequent graphics commands also work at this
- // brightness level). If there's a significant step up in brightness,
- // the limited number of steps (quantization) in the old data will be
- // quite visible in the re-scaled version. For a non-destructive
- // change, you'll need to re-render the full strip data. C'est la vie.
- uint8_t c,
- *ptr = pixels,
- oldBrightness = brightness - 1; // De-wrap old brightness value
- uint16_t scale;
- if (oldBrightness == 0)
- scale = 0; // Avoid /0
- else if (b == 255)
- scale = 65535 / oldBrightness;
- else
- scale = (((uint16_t)newBrightness << 8) - 1) / oldBrightness;
- for (uint16_t i = 0; i < numBytes; i++) {
- c = *ptr;
- *ptr++ = (c * scale) >> 8;
- }
- brightness = newBrightness;
- }
-}
-
-/*!
- @brief Retrieve the last-set brightness value for the strip.
- @return Brightness value: 0 = minimum (off), 255 = maximum.
-*/
-uint8_t Adafruit_NeoPixel::getBrightness(void) const { return brightness - 1; }
-
-/*!
- @brief Fill the whole NeoPixel strip with 0 / black / off.
-*/
-void Adafruit_NeoPixel::clear(void) { memset(pixels, 0, numBytes); }
-
-// A 32-bit variant of gamma8() that applies the same function
-// to all components of a packed RGB or WRGB value.
-uint32_t Adafruit_NeoPixel::gamma32(uint32_t x) {
- uint8_t *y = (uint8_t *)&x;
- // All four bytes of a 32-bit value are filtered even if RGB (not WRGB),
- // to avoid a bunch of shifting and masking that would be necessary for
- // properly handling different endianisms (and each byte is a fairly
- // trivial operation, so it might not even be wasting cycles vs a check
- // and branch for the RGB case). In theory this might cause trouble *if*
- // someone's storing information in the unused most significant byte
- // of an RGB value, but this seems exceedingly rare and if it's
- // encountered in reality they can mask values going in or coming out.
- for (uint8_t i = 0; i < 4; i++)
- y[i] = gamma8(y[i]);
- return x; // Packed 32-bit return
-}
-
-/*!
- @brief Fill NeoPixel strip with one or more cycles of hues.
- Everyone loves the rainbow swirl so much, now it's canon!
- @param first_hue Hue of first pixel, 0-65535, representing one full
- cycle of the color wheel. Each subsequent pixel will
- be offset to complete one or more cycles over the
- length of the strip.
- @param reps Number of cycles of the color wheel over the length
- of the strip. Default is 1. Negative values can be
- used to reverse the hue order.
- @param saturation Saturation (optional), 0-255 = gray to pure hue,
- default = 255.
- @param brightness Brightness/value (optional), 0-255 = off to max,
- default = 255. This is distinct and in combination
- with any configured global strip brightness.
- @param gammify If true (default), apply gamma correction to colors
- for better appearance.
-*/
-void Adafruit_NeoPixel::rainbow(uint16_t first_hue, int8_t reps,
- uint8_t saturation, uint8_t brightness,
- bool gammify) {
- for (uint16_t i = 0; i < numLEDs; i++) {
- uint16_t hue = first_hue + (i * reps * 65536) / numLEDs;
- uint32_t color = ColorHSV(hue, saturation, brightness);
- if (gammify)
- color = gamma32(color);
- setPixelColor(i, color);
- }
-}
-
-/*!
- @brief Convert pixel color order from string (e.g. "BGR") to NeoPixel
- color order constant (e.g. NEO_BGR). This may be helpful for code
- that initializes from text configuration rather than compile-time
- constants.
- @param v Input string. Should be reasonably sanitized (a 3- or 4-
- character NUL-terminated string) or undefined behavior may
- result (output is still a valid NeoPixel order constant, but
- might not present as expected). Garbage in, garbage out.
- @return One of the NeoPixel color order constants (e.g. NEO_BGR).
- NEO_KHZ400 or NEO_KHZ800 bits are not included, nor needed (all
- NeoPixels actually support 800 KHz it's been found, and this is
- the default state if no KHZ bits set).
- @note This function is declared static in the class so it can be called
- without a NeoPixel object (since it's not likely been declared
- in the code yet). Use Adafruit_NeoPixel::str2order().
-*/
-neoPixelType Adafruit_NeoPixel::str2order(const char *v) {
- int8_t r = 0, g = 0, b = 0, w = -1;
- if (v) {
- char c;
- for (uint8_t i = 0; ((c = tolower(v[i]))); i++) {
- if (c == 'r')
- r = i;
- else if (c == 'g')
- g = i;
- else if (c == 'b')
- b = i;
- else if (c == 'w')
- w = i;
- }
- r &= 3;
- }
- if (w < 0)
- w = r; // If 'w' not specified, duplicate r bits
- return (w << 6) | (r << 4) | ((g & 3) << 2) | (b & 3);
-}
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