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96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/* ---------------------------------------------------------------------------
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File: led_strip.h
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Author(s): Lucas Bruder <LBruder@me.com>
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Date Created: 11/23/2016
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Last modified: 11/26/2016
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Description:
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This library can drive led strips through the RMT module on the ESP32.
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------------------------------------------------------------------------ */
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#ifndef LED_STRIP_H
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#define LED_STRIP_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <driver/rmt.h>
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#include <driver/gpio.h>
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#include "freertos/semphr.h"
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#include <stddef.h>
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enum rgb_led_type_t {
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RGB_LED_TYPE_WS2812 = 0,
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RGB_LED_TYPE_SK6812 = 1,
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RGB_LED_TYPE_APA106 = 2,
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RGB_LED_TYPE_MAX,
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};
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/**
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* RGB LED colors
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*/
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struct led_color_t {
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uint8_t red;
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uint8_t green;
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uint8_t blue;
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};
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struct led_strip_t {
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const enum rgb_led_type_t rgb_led_type;
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uint32_t led_strip_length;
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// RMT peripheral settings
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rmt_channel_t rmt_channel;
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/*
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* Interrupt table is located in soc.h
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* As of 11/27/16, reccomended interrupts are:
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* 9, 12, 13, 17, 18, 19, 20, 21 or 23
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* Ensure that the same interrupt number isn't used twice
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* across all libraries
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*/
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int rmt_interrupt_num;
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gpio_num_t gpio; // Must be less than GPIO_NUM_33
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struct led_color_t *led_strip_working;
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struct led_color_t *led_strip_showing;
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SemaphoreHandle_t access_semaphore;
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};
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bool led_strip_init(struct led_strip_t *led_strip);
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/**
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* Sets the pixel at pixel_num to color.
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*/
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bool led_strip_set_pixel_color(struct led_strip_t *led_strip, uint32_t pixel_num, struct led_color_t *color);
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bool led_strip_set_pixel_rgb(struct led_strip_t *led_strip, uint32_t pixel_num, uint8_t red, uint8_t green, uint8_t blue);
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/**
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* Get the pixel color at pixel_num for the led strip that is currently being shown!
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* NOTE: If you call set_pixel_color then get_pixel_color for the same pixel_num, you will not
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* get back the same pixel value. This gets you the color of the pixel currently being shown, not the one
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* being updated
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*
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* If there is an invalid argument, color will point to NULL and this function will return false.
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*/
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bool led_strip_get_pixel_color(struct led_strip_t *led_strip, uint32_t pixel_num, struct led_color_t *color);
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/**
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* Updates the led buffer to be shown using double buffering.
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*/
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bool led_strip_show(struct led_strip_t *led_strip);
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/**
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* Clears the LED strip.
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*/
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bool led_strip_clear(struct led_strip_t *led_strip);
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#ifdef __cplusplus
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}
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#endif
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#endif // LED_STRIP_H
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