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authorkrolyxon <me@krolyxon.com>2026-06-08 23:10:46 +0530
committerkrolyxon <me@krolyxon.com>2026-06-08 23:10:46 +0530
commit3120783000d0025b183b0397acaa8b769499eb38 (patch)
tree1c4f93be213f1b1d48f59e554562d847b4e7c25e /.pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/Adafruit_NeoPixel.h
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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