From 8a4d103196312b8a18afc0a2ba0fc13ff1a0b180 Mon Sep 17 00:00:00 2001 From: krolyxon Date: Mon, 8 Jun 2026 23:12:15 +0530 Subject: remove .pio --- .../Adafruit NeoPixel/Adafruit_NeoPixel.cpp | 3815 -------------------- 1 file changed, 3815 deletions(-) delete mode 100644 .pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/Adafruit_NeoPixel.cpp (limited to '.pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/Adafruit_NeoPixel.cpp') 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 - * . - * - */ - -#include "Adafruit_NeoPixel.h" - -#if defined(TARGET_LPC1768) -#include -#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() -#include -#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<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); -} -- cgit v1.2.3