 : 点亮WS2812 RGB)
1.说明
开发框架 : ESP-IDF, 版本: 5.5.0
开发版图片(图中左边typec接口上面一点的白色小方块就是WS2812 RGB) :
2.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, 但是不影响功能
#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)); } }
