ESP32-S3(2) : WS2812 RGB

说明

点亮WS2812 RGB

代码

main/CMakeLists.txt

# 主程序组件

idf_component_register(SRCS "main.c"

                    INCLUDE_DIRS ".")

CMakeLists.txt

# The following five lines of boilerplate have to be in your project's

# CMakeLists in this exact order for cmake to work correctly

cmake_minimum_required(VERSION 3.16)



include($ENV{IDF_PATH}/tools/cmake/project.cmake)

project(0_kai_fa_ban)

main/main.c

rmt.h过时了

#include <stdio.h>

#include "freertos/FreeRTOS.h"

#include "freertos/task.h"

#include "driver/rmt.h"

#include "esp_log.h"



static const char *TAG = "WS2812";



#define WS2812_GPIO_PIN   GPIO_NUM_48

#define LED_NUM           1

#define RMT_TX_CHANNEL    RMT_CHANNEL_0



// WS2812 timing parameters (in nanoseconds)

#define T0H  350  // 0 bit high time

#define T0L  900  // 0 bit low time

#define T1H  900  // 1 bit high time  

#define T1L  350  // 1 bit low time

#define RESET 50000 // Reset time



// Convert time to RMT ticks (80MHz / 4 = 20MHz, 1 tick = 50ns)

#define NS_TO_TICKS(ns) ((ns) / 50)



void ws2812_init(void)

{

    rmt_config_t config = RMT_DEFAULT_CONFIG_TX(WS2812_GPIO_PIN, RMT_TX_CHANNEL);

    config.clk_div = 4;  // 80MHz / 4 = 20MHz

    config.mem_block_num = 1;

    config.tx_config.loop_en = false;

    config.tx_config.carrier_en = false;

    config.tx_config.idle_output_en = true;

    config.tx_config.idle_level = RMT_IDLE_LEVEL_LOW;

    

    ESP_ERROR_CHECK(rmt_config(&config));

    ESP_ERROR_CHECK(rmt_driver_install(config.channel, 0, 0));

    

    ESP_LOGI(TAG, "WS2812 initialized on GPIO %d", WS2812_GPIO_PIN);

}



void set_led_color(uint8_t red, uint8_t green, uint8_t blue)

{

    uint8_t color[3] = {green, red, blue};  // WS2812 uses GRB order

    rmt_item32_t items[24];  // 3 bytes * 8 bits

    

    // Convert each bit to RMT items

    for (int i = 0; i < 3; i++) {

        for (int j = 0; j < 8; j++) {

            int bit_index = (i * 8) + j;

            if (color[i] & (1 << (7 - j))) {

                // Bit 1

                items[bit_index].level0 = 1;

                items[bit_index].duration0 = NS_TO_TICKS(T1H);

                items[bit_index].level1 = 0;

                items[bit_index].duration1 = NS_TO_TICKS(T1L);

            } else {

                // Bit 0

                items[bit_index].level0 = 1;

                items[bit_index].duration0 = NS_TO_TICKS(T0H);

                items[bit_index].level1 = 0;

                items[bit_index].duration1 = NS_TO_TICKS(T0L);

            }

        }

    }

    

    // Send data

    ESP_ERROR_CHECK(rmt_write_items(RMT_TX_CHANNEL, items, 24, true));

    // Reset

    vTaskDelay(pdMS_TO_TICKS(1));

}



void app_main(void)

{

    ESP_LOGI(TAG, "Starting WS2812 Demo");

    

    ws2812_init();

    vTaskDelay(pdMS_TO_TICKS(1000));

    

    while (1) {

        ESP_LOGI(TAG, "Red");

        set_led_color(255, 0, 0);

        vTaskDelay(pdMS_TO_TICKS(1000));

        

        ESP_LOGI(TAG, "Green");

        set_led_color(0, 255, 0);

        vTaskDelay(pdMS_TO_TICKS(1000));

        

        ESP_LOGI(TAG, "Blue");

        set_led_color(0, 0, 255);

        vTaskDelay(pdMS_TO_TICKS(1000));

        

        ESP_LOGI(TAG, "White");

        set_led_color(255, 255, 255);

        vTaskDelay(pdMS_TO_TICKS(1000));

        

        ESP_LOGI(TAG, "Off");

        set_led_color(0, 0, 0);

        vTaskDelay(pdMS_TO_TICKS(1000));

    }

}