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authorkrolyxon <me@krolyxon.com>2026-06-08 23:12:15 +0530
committerkrolyxon <me@krolyxon.com>2026-06-08 23:12:15 +0530
commit8a4d103196312b8a18afc0a2ba0fc13ff1a0b180 (patch)
treea92424ac65fbdb93702ea8c44a5c52c9fd66e28c /.pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/Adafruit_NeoPixel.h
parent1d557527be495c59bbc07f194d903b1cec1780d3 (diff)
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-/*!
- * @file Adafruit_NeoPixel.h
- *
- * This is part of 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!
- *
- * Written by Phil "Paint Your Dragon" Burgess for Adafruit Industries,
- * with contributions by PJRC, Michael Miller and other members of the
- * open source community.
- *
- * This file is part of the Adafruit_NeoPixel library.
- *
- * Adafruit_NeoPixel is free software: you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * Adafruit_NeoPixel is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with NeoPixel. If not, see
- * <http://www.gnu.org/licenses/>.
- *
- */
-
-#ifndef ADAFRUIT_NEOPIXEL_H
-#define ADAFRUIT_NEOPIXEL_H
-
-#ifdef ARDUINO
-#include <Arduino.h>
-
-#ifdef USE_TINYUSB // For Serial when selecting TinyUSB
-#include <Adafruit_TinyUSB.h>
-#endif
-
-#endif
-
-#ifdef TARGET_LPC1768
-#include <Arduino.h>
-#endif
-
-#if defined(ARDUINO_ARCH_RP2040)
-#include "hardware/clocks.h"
-#include "hardware/pio.h"
-#include "rp2040_pio.h"
-#include <stdlib.h>
-#endif
-
-// The order of primary colors in the NeoPixel data stream can vary among
-// device types, manufacturers and even different revisions of the same
-// item. The third parameter to the Adafruit_NeoPixel constructor encodes
-// the per-pixel byte offsets of the red, green and blue primaries (plus
-// white, if present) in the data stream -- the following #defines provide
-// an easier-to-use named version for each permutation. e.g. NEO_GRB
-// indicates a NeoPixel-compatible device expecting three bytes per pixel,
-// with the first byte transmitted containing the green value, second
-// containing red and third containing blue. The in-memory representation
-// of a chain of NeoPixels is the same as the data-stream order; no
-// re-ordering of bytes is required when issuing data to the chain.
-// Most of these values won't exist in real-world devices, but it's done
-// this way so we're ready for it (also, if using the WS2811 driver IC,
-// one might have their pixels set up in any weird permutation).
-
-// Bits 5,4 of this value are the offset (0-3) from the first byte of a
-// pixel to the location of the red color byte. Bits 3,2 are the green
-// offset and 1,0 are the blue offset. If it is an RGBW-type device
-// (supporting a white primary in addition to R,G,B), bits 7,6 are the
-// offset to the white byte...otherwise, bits 7,6 are set to the same value
-// as 5,4 (red) to indicate an RGB (not RGBW) device.
-// i.e. binary representation:
-// 0bWWRRGGBB for RGBW devices
-// 0bRRRRGGBB for RGB
-
-// RGB NeoPixel permutations; white and red offsets are always same
-// Offset: W R G B
-#define NEO_RGB ((0 << 6) | (0 << 4) | (1 << 2) | (2)) ///< Transmit as R,G,B
-#define NEO_RBG ((0 << 6) | (0 << 4) | (2 << 2) | (1)) ///< Transmit as R,B,G
-#define NEO_GRB ((1 << 6) | (1 << 4) | (0 << 2) | (2)) ///< Transmit as G,R,B
-#define NEO_GBR ((2 << 6) | (2 << 4) | (0 << 2) | (1)) ///< Transmit as G,B,R
-#define NEO_BRG ((1 << 6) | (1 << 4) | (2 << 2) | (0)) ///< Transmit as B,R,G
-#define NEO_BGR ((2 << 6) | (2 << 4) | (1 << 2) | (0)) ///< Transmit as B,G,R
-
-// RGBW NeoPixel permutations; all 4 offsets are distinct
-// Offset: W R G B
-#define NEO_WRGB ((0 << 6) | (1 << 4) | (2 << 2) | (3)) ///< Transmit as W,R,G,B
-#define NEO_WRBG ((0 << 6) | (1 << 4) | (3 << 2) | (2)) ///< Transmit as W,R,B,G
-#define NEO_WGRB ((0 << 6) | (2 << 4) | (1 << 2) | (3)) ///< Transmit as W,G,R,B
-#define NEO_WGBR ((0 << 6) | (3 << 4) | (1 << 2) | (2)) ///< Transmit as W,G,B,R
-#define NEO_WBRG ((0 << 6) | (2 << 4) | (3 << 2) | (1)) ///< Transmit as W,B,R,G
-#define NEO_WBGR ((0 << 6) | (3 << 4) | (2 << 2) | (1)) ///< Transmit as W,B,G,R
-
-#define NEO_RWGB ((1 << 6) | (0 << 4) | (2 << 2) | (3)) ///< Transmit as R,W,G,B
-#define NEO_RWBG ((1 << 6) | (0 << 4) | (3 << 2) | (2)) ///< Transmit as R,W,B,G
-#define NEO_RGWB ((2 << 6) | (0 << 4) | (1 << 2) | (3)) ///< Transmit as R,G,W,B
-#define NEO_RGBW ((3 << 6) | (0 << 4) | (1 << 2) | (2)) ///< Transmit as R,G,B,W
-#define NEO_RBWG ((2 << 6) | (0 << 4) | (3 << 2) | (1)) ///< Transmit as R,B,W,G
-#define NEO_RBGW ((3 << 6) | (0 << 4) | (2 << 2) | (1)) ///< Transmit as R,B,G,W
-
-#define NEO_GWRB ((1 << 6) | (2 << 4) | (0 << 2) | (3)) ///< Transmit as G,W,R,B
-#define NEO_GWBR ((1 << 6) | (3 << 4) | (0 << 2) | (2)) ///< Transmit as G,W,B,R
-#define NEO_GRWB ((2 << 6) | (1 << 4) | (0 << 2) | (3)) ///< Transmit as G,R,W,B
-#define NEO_GRBW ((3 << 6) | (1 << 4) | (0 << 2) | (2)) ///< Transmit as G,R,B,W
-#define NEO_GBWR ((2 << 6) | (3 << 4) | (0 << 2) | (1)) ///< Transmit as G,B,W,R
-#define NEO_GBRW ((3 << 6) | (2 << 4) | (0 << 2) | (1)) ///< Transmit as G,B,R,W
-
-#define NEO_BWRG ((1 << 6) | (2 << 4) | (3 << 2) | (0)) ///< Transmit as B,W,R,G
-#define NEO_BWGR ((1 << 6) | (3 << 4) | (2 << 2) | (0)) ///< Transmit as B,W,G,R
-#define NEO_BRWG ((2 << 6) | (1 << 4) | (3 << 2) | (0)) ///< Transmit as B,R,W,G
-#define NEO_BRGW ((3 << 6) | (1 << 4) | (2 << 2) | (0)) ///< Transmit as B,R,G,W
-#define NEO_BGWR ((2 << 6) | (3 << 4) | (1 << 2) | (0)) ///< Transmit as B,G,W,R
-#define NEO_BGRW ((3 << 6) | (2 << 4) | (1 << 2) | (0)) ///< Transmit as B,G,R,W
-
-// Add NEO_KHZ400 to the color order value to indicate a 400 KHz device.
-// All but the earliest v1 NeoPixels expect an 800 KHz data stream, this is
-// the default if unspecified. Because flash space is very limited on ATtiny
-// devices (e.g. Trinket, Gemma), v1 NeoPixels aren't handled by default on
-// those chips, though it can be enabled by removing the ifndef/endif below,
-// but code will be bigger. Conversely, can disable the NEO_KHZ400 line on
-// other MCUs to remove v1 support and save a little space.
-
-#define NEO_KHZ800 0x0000 ///< 800 KHz data transmission
-#ifndef __AVR_ATtiny85__
-#define NEO_KHZ400 0x0100 ///< 400 KHz data transmission
-#endif
-
-// If 400 KHz support is enabled, the third parameter to the constructor
-// requires a 16-bit value (in order to select 400 vs 800 KHz speed).
-// If only 800 KHz is enabled (as is default on ATtiny), an 8-bit value
-// is sufficient to encode pixel color order, saving some space.
-
-#ifdef NEO_KHZ400
-typedef uint16_t neoPixelType; ///< 3rd arg to Adafruit_NeoPixel constructor
-#else
-typedef uint8_t neoPixelType; ///< 3rd arg to Adafruit_NeoPixel constructor
-#endif
-
-// These two tables are declared outside the Adafruit_NeoPixel class
-// because some boards may require oldschool compilers that don't
-// handle the C++11 constexpr keyword.
-
-/* A PROGMEM (flash mem) table containing 8-bit unsigned sine wave (0-255).
- Copy & paste this snippet into a Python REPL to regenerate:
-import math
-for x in range(256):
- print("{:3},".format(int((math.sin(x/128.0*math.pi)+1.0)*127.5+0.5))),
- if x&15 == 15: print
-*/
-static const uint8_t PROGMEM _NeoPixelSineTable[256] = {
- 128, 131, 134, 137, 140, 143, 146, 149, 152, 155, 158, 162, 165, 167, 170,
- 173, 176, 179, 182, 185, 188, 190, 193, 196, 198, 201, 203, 206, 208, 211,
- 213, 215, 218, 220, 222, 224, 226, 228, 230, 232, 234, 235, 237, 238, 240,
- 241, 243, 244, 245, 246, 248, 249, 250, 250, 251, 252, 253, 253, 254, 254,
- 254, 255, 255, 255, 255, 255, 255, 255, 254, 254, 254, 253, 253, 252, 251,
- 250, 250, 249, 248, 246, 245, 244, 243, 241, 240, 238, 237, 235, 234, 232,
- 230, 228, 226, 224, 222, 220, 218, 215, 213, 211, 208, 206, 203, 201, 198,
- 196, 193, 190, 188, 185, 182, 179, 176, 173, 170, 167, 165, 162, 158, 155,
- 152, 149, 146, 143, 140, 137, 134, 131, 128, 124, 121, 118, 115, 112, 109,
- 106, 103, 100, 97, 93, 90, 88, 85, 82, 79, 76, 73, 70, 67, 65,
- 62, 59, 57, 54, 52, 49, 47, 44, 42, 40, 37, 35, 33, 31, 29,
- 27, 25, 23, 21, 20, 18, 17, 15, 14, 12, 11, 10, 9, 7, 6,
- 5, 5, 4, 3, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0,
- 0, 1, 1, 1, 2, 2, 3, 4, 5, 5, 6, 7, 9, 10, 11,
- 12, 14, 15, 17, 18, 20, 21, 23, 25, 27, 29, 31, 33, 35, 37,
- 40, 42, 44, 47, 49, 52, 54, 57, 59, 62, 65, 67, 70, 73, 76,
- 79, 82, 85, 88, 90, 93, 97, 100, 103, 106, 109, 112, 115, 118, 121,
- 124};
-
-/* Similar to above, but for an 8-bit gamma-correction table.
- Copy & paste this snippet into a Python REPL to regenerate:
-import math
-gamma=2.6
-for x in range(256):
- print("{:3},".format(int(math.pow((x)/255.0,gamma)*255.0+0.5))),
- if x&15 == 15: print
-*/
-static const uint8_t PROGMEM _NeoPixelGammaTable[256] = {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3,
- 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6,
- 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10,
- 11, 11, 11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16, 17,
- 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 24, 24, 25,
- 25, 26, 27, 27, 28, 29, 29, 30, 31, 31, 32, 33, 34, 34, 35,
- 36, 37, 38, 38, 39, 40, 41, 42, 42, 43, 44, 45, 46, 47, 48,
- 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
- 64, 65, 66, 68, 69, 70, 71, 72, 73, 75, 76, 77, 78, 80, 81,
- 82, 84, 85, 86, 88, 89, 90, 92, 93, 94, 96, 97, 99, 100, 102,
- 103, 105, 106, 108, 109, 111, 112, 114, 115, 117, 119, 120, 122, 124, 125,
- 127, 129, 130, 132, 134, 136, 137, 139, 141, 143, 145, 146, 148, 150, 152,
- 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182,
- 184, 186, 188, 191, 193, 195, 197, 199, 202, 204, 206, 209, 211, 213, 215,
- 218, 220, 223, 225, 227, 230, 232, 235, 237, 240, 242, 245, 247, 250, 252,
- 255};
-
-/* Declare external methods required by the Adafruit_NeoPixel implementation
- for specific hardware/library versions
-*/
-#if defined(ESP32)
-#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 0, 0)
-extern "C" void espInit();
-#endif
-#endif
-
-/*!
- @brief Class that stores state and functions for interacting with
- Adafruit NeoPixels and compatible devices.
-*/
-class Adafruit_NeoPixel {
-
- public:
- // Constructor: number of LEDs, pin number, LED type
- Adafruit_NeoPixel(uint16_t n, int16_t pin = 6,
- neoPixelType type = NEO_GRB + NEO_KHZ800);
- Adafruit_NeoPixel(void);
- ~Adafruit_NeoPixel();
-
- bool begin(void);
- void show(void);
- void setPin(int16_t p);
- void setPixelColor(uint16_t n, uint8_t r, uint8_t g, uint8_t b);
- void setPixelColor(uint16_t n, uint8_t r, uint8_t g, uint8_t b, uint8_t w);
- void setPixelColor(uint16_t n, uint32_t c);
- void fill(uint32_t c = 0, uint16_t first = 0, uint16_t count = 0);
- void setBrightness(uint8_t);
- void clear(void);
- void updateLength(uint16_t n);
- void updateType(neoPixelType t);
- /*!
- @brief Check whether a call to show() will start sending data
- immediately or will 'block' for a required interval. NeoPixels
- require a short quiet time (about 300 microseconds) after the
- last bit is received before the data 'latches' and new data can
- start being received. Usually one's sketch is implicitly using
- this time to generate a new frame of animation...but if it
- finishes very quickly, this function could be used to see if
- there's some idle time available for some low-priority
- concurrent task.
- @return 1 or true if show() will start sending immediately, 0 or false
- if show() would block (meaning some idle time is available).
- */
- bool canShow(void) {
- // It's normal and possible for endTime to exceed micros() if the
- // 32-bit clock counter has rolled over (about every 70 minutes).
- // Since both are uint32_t, a negative delta correctly maps back to
- // positive space, and it would seem like the subtraction below would
- // suffice. But a problem arises if code invokes show() very
- // infrequently...the micros() counter may roll over MULTIPLE times in
- // that interval, the delta calculation is no longer correct and the
- // next update may stall for a very long time. The check below resets
- // the latch counter if a rollover has occurred. This can cause an
- // extra delay of up to 300 microseconds in the rare case where a
- // show() call happens precisely around the rollover, but that's
- // neither likely nor especially harmful, vs. other code that might
- // stall for 30+ minutes, or having to document and frequently remind
- // and/or provide tech support explaining an unintuitive need for
- // show() calls at least once an hour.
- uint32_t now = micros();
- if (endTime > now) {
- endTime = now;
- }
- return (now - endTime) >= 300L;
- }
- /*!
- @brief Get a pointer directly to the NeoPixel data buffer in RAM.
- Pixel data is stored in a device-native format (a la the NEO_*
- constants) and is not translated here. Applications that access
- this buffer will need to be aware of the specific data format
- and handle colors appropriately.
- @return Pointer to NeoPixel buffer (uint8_t* array).
- @note This is for high-performance applications where calling
- setPixelColor() on every single pixel would be too slow (e.g.
- POV or light-painting projects). There is no bounds checking
- on the array, creating tremendous potential for mayhem if one
- writes past the ends of the buffer. Great power, great
- responsibility and all that.
- */
- uint8_t *getPixels(void) const { return pixels; };
- uint8_t getBrightness(void) const;
- /*!
- @brief Retrieve the pin number used for NeoPixel data output.
- @return Arduino pin number (-1 if not set).
- */
- int16_t getPin(void) const { return pin; };
- /*!
- @brief Return the number of pixels in an Adafruit_NeoPixel strip object.
- @return Pixel count (0 if not set).
- */
- uint16_t numPixels(void) const { return numLEDs; }
- uint32_t getPixelColor(uint16_t n) const;
- /*!
- @brief An 8-bit integer sine wave function, not directly compatible
- with standard trigonometric units like radians or degrees.
- @param x Input angle, 0-255; 256 would loop back to zero, completing
- the circle (equivalent to 360 degrees or 2 pi radians).
- One can therefore use an unsigned 8-bit variable and simply
- add or subtract, allowing it to overflow/underflow and it
- still does the expected contiguous thing.
- @return Sine result, 0 to 255, or -128 to +127 if type-converted to
- a signed int8_t, but you'll most likely want unsigned as this
- output is often used for pixel brightness in animation effects.
- */
- static uint8_t sine8(uint8_t x) {
- return pgm_read_byte(&_NeoPixelSineTable[x]); // 0-255 in, 0-255 out
- }
- /*!
- @brief An 8-bit gamma-correction function for basic pixel brightness
- adjustment. Makes color transitions appear more perceptially
- correct.
- @param x Input brightness, 0 (minimum or off/black) to 255 (maximum).
- @return Gamma-adjusted brightness, can then be passed to one of the
- setPixelColor() functions. This uses a fixed gamma correction
- exponent of 2.6, which seems reasonably okay for average
- NeoPixels in average tasks. If you need finer control you'll
- need to provide your own gamma-correction function instead.
- */
- static uint8_t gamma8(uint8_t x) {
- return pgm_read_byte(&_NeoPixelGammaTable[x]); // 0-255 in, 0-255 out
- }
- /*!
- @brief Convert separate red, green and blue values into a single
- "packed" 32-bit RGB color.
- @param r Red brightness, 0 to 255.
- @param g Green brightness, 0 to 255.
- @param b Blue brightness, 0 to 255.
- @return 32-bit packed RGB value, which can then be assigned to a
- variable for later use or passed to the setPixelColor()
- function. Packed RGB format is predictable, regardless of
- LED strand color order.
- */
- static uint32_t Color(uint8_t r, uint8_t g, uint8_t b) {
- return ((uint32_t)r << 16) | ((uint32_t)g << 8) | b;
- }
- /*!
- @brief Convert separate red, green, blue and white values into a
- single "packed" 32-bit WRGB color.
- @param r Red brightness, 0 to 255.
- @param g Green brightness, 0 to 255.
- @param b Blue brightness, 0 to 255.
- @param w White brightness, 0 to 255.
- @return 32-bit packed WRGB value, which can then be assigned to a
- variable for later use or passed to the setPixelColor()
- function. Packed WRGB format is predictable, regardless of
- LED strand color order.
- */
- static uint32_t Color(uint8_t r, uint8_t g, uint8_t b, uint8_t w) {
- return ((uint32_t)w << 24) | ((uint32_t)r << 16) | ((uint32_t)g << 8) |
- b;
- }
- static uint32_t ColorHSV(uint16_t hue, uint8_t sat = 255,
- uint8_t val = 255);
- /*!
- @brief A gamma-correction function for 32-bit packed RGB or WRGB
- colors. Makes color transitions appear more perceptially
- correct.
- @param x 32-bit packed RGB or WRGB color.
- @return Gamma-adjusted packed color, can then be passed in one of the
- setPixelColor() functions. Like gamma8(), this uses a fixed
- gamma correction exponent of 2.6, which seems reasonably okay
- for average NeoPixels in average tasks. If you need finer
- control you'll need to provide your own gamma-correction
- function instead.
- */
- static uint32_t gamma32(uint32_t x);
-
- void rainbow(uint16_t first_hue = 0, int8_t reps = 1,
- uint8_t saturation = 255, uint8_t brightness = 255,
- bool gammify = true);
-
- static neoPixelType str2order(const char *v);
-
- private:
-#if defined(ARDUINO_ARCH_RP2040)
- bool rp2040claimPIO(void);
- void rp2040releasePIO(void);
- void rp2040Show(uint8_t *pixels, uint32_t numBytes);
- PIO pio = NULL;
- uint pio_sm = -1;
- uint pio_program_offset = 0;
-#endif
-
- protected:
-#ifdef NEO_KHZ400 // If 400 KHz NeoPixel support enabled...
- bool is800KHz; ///< true if 800 KHz pixels
-#endif
-
- bool begun; ///< true if begin() previously called successfully
- uint16_t numLEDs; ///< Number of RGB LEDs in strip
- uint16_t numBytes; ///< Size of 'pixels' buffer below
- int16_t pin; ///< Output pin number (-1 if not yet set)
- uint8_t brightness; ///< Strip brightness 0-255 (stored as +1)
- uint8_t *pixels; ///< Holds LED color values (3 or 4 bytes each)
- uint8_t rOffset; ///< Red index within each 3- or 4-byte pixel
- uint8_t gOffset; ///< Index of green byte
- uint8_t bOffset; ///< Index of blue byte
- uint8_t wOffset; ///< Index of white (==rOffset if no white)
- uint32_t endTime; ///< Latch timing reference
-
-#ifdef __AVR__
- volatile uint8_t *port; ///< Output PORT register
- uint8_t pinMask; ///< Output PORT bitmask
-#endif
-
-#if defined(ARDUINO_ARCH_STM32) || defined(ARDUINO_ARCH_ARDUINO_CORE_STM32) || \
- defined(ARDUINO_ARCH_CH32) || defined(_PY32_DEF_)
- GPIO_TypeDef *gpioPort; ///< Output GPIO PORT
- uint32_t gpioPin; ///< Output GPIO PIN
-#endif
-};
-
-#endif // ADAFRUIT_NEOPIXEL_H