ESP32-C3开发与WS2812灯条控制

WS2812驱动配置

mkdir components

2. 复制examples/common_components/led_strip到components中。
3. 在main.c中引入头文件：

#include "driver/rmt.h"  #include "led_strip.h"  #include "esp_system.h"  #include "esp_log.h"

灯条初始化

```c #define RMT_TX_NUM 3 #define RMT_TX_CHANNEL RMT_CHANNEL_0 #define LED_STRIP_NUM 24

void init_led(void) {

rmt_config_t config = RMT_DEFAULT_CONFIG_TX(RMT_TX_NUM, RMT_TX_CHANNEL);
config.clk_div = 2;
ESP_ERROR_CHECK(rmt_config(&config));
ESP_ERROR_CHECK(rmt_driver_install(config.channel, 0, 0));

led_strip_config_t strip_config = LED_STRIP_DEFAULT_CONFIG(LED_STRIP_NUM, (led_strip_dev_t)config.channel);  strip = led_strip_new_rmt_ws2812(&strip_config);  if (!strip) {      ESP_LOGE(TAG, "install WS2812 driver failed");  }  ESP_ERROR_CHECK(strip->clear(strip, 100));

}

RGB颜色设置
  
     
  ```c  struct WS2812_COLOR {      uint32_t red;      uint32_t green;      uint32_t blue;  };  struct WS2812_COLOR WS2812_RGB;  void set_rgb(uint16_t red, uint16_t green, uint16_t blue) {      for (int i = 0; i < LED_STRIP_NUM; i++) {          strip->set_pixel(strip, i, red, green, blue);      }      WS2812_RGB.red = red;      WS2812_RGB.green = green;      WS2812_RGB.blue = blue;      strip->refresh(strip, 10);  }

UART串口配置

1. 初始化UART配置： ```c void UART_Init(void) { const uart_config_t uart_config = { .baud_rate = 38400, .data_bits = UART_DATA_8_BITS, .parity = UART_PARITY_DISABLE, .stop_bits = UART_STOP_BITS_1, .flow_ctrl = UART_HW_FLOWCTRL_DISABLE, .source_clk = UART_SCLK_APB, };

uart_driver_install(UART_NUM_1, RX_BUF_SIZE * 2, 0, 0, NULL, 0);  uart_param_config(UART_NUM_1, &uart_config);  uart_set_pin(UART_NUM_1, TXD_PIN, RXD_PIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);

}

2. 创建接收任务：  ```c  xTaskCreate(uartRxTask, "uart_rx_task", 1024 * 3, NULL, 4, NULL);

3. 串口接收任务函数：

static void uartRxTask(void *arg) {      static const char *RX_TASK_TAG = "RX_TASK";      esp_log_level_set(RX_TASK_TAG, ESP_LOG_INFO);      uint8_t *data = (uint8_t *)malloc(RX_BUF_SIZE + 1);      while (1) {          const int rxBytes = uart_read_bytes(UART_NUM_1, data, RX_BUF_SIZE, 1000 / portTICK_RATE_MS);          if (rxBytes > 0) {              data[rxBytes] = 0;              ESP_LOGI(RX_TASK_TAG, "Read %d bytes: '%s'", rxBytes, data);              memset(cJson_data, 0, sizeof(cJson_data));              uartControlLedStrip(uartDataHandle(data));              ESP_LOG_BUFFER_HEXDUMP(RX_TASK_TAG, data, rxBytes, ESP_LOG_INFO);          }          free(data);      }  }

WiFi配置

通过`menuconfig`配置WiFi名称和密码即可连接。ESP-IDF已提供相关配置文件，只需简单修改即可完成连接。

阿里云MQTT配置

1. 创建阿里云物联网产品和设备，获取设备的三元组信息。 2. 在代码中配置MQTT客户端： ```c void TaskXMqttRecieve(void *p) { esp_mqtt_client_config_t mqtt_cfg = { .host = MQTT_LINK_HOST, .port = MQTT_LINK_PORT, .username = MQTT_LINK_USERNAME, .password = MQTT_LINK_PASS, .client_id = MQTT_LINK_CLIENT_ID, .event_handle = MqttCloudsCallBack, .keepalive = 120, .disable_auto_reconnect = false, .disable_clean_session = false, };

client = esp_mqtt_client_init(&mqtt_cfg);  esp_mqtt_client_start(client);  vTaskDelete(NULL);

}

3. 订阅主题并处理消息：  ```c  sprintf(MqttTopicSub, "/sys/%s/%s/thing/service/property/set", MQTT_ProductKey, MQTT_DeviceName);  ESP_LOGI(TAG, "MqttTopicSub: %s", MqttTopicSub);  case MQTT_EVENT_DATA:  {      printf("TOPIC=%.*s \r\n", event->topic_len, event->topic);      printf("DATA=%.*s \r\n\r\n", event->data_len, event->data);      struct __User_data *pTmper;      memset(&user_data, 0, sizeof(struct __User_data));      sprintf(user_data.allData, "%.*s", event->data_len, event->data);      pTmper = &user_data;      user_data.dataLen = event->data_len;      xQueueSend(ParseJSONQueueHandler, (void *)&pTmper, portMAX_DELAY);      break;  }

消息处理

```c void Task_ParseJSON(void *pvParameters) { while (1) { struct __User_data *pMqttMsg; printf("Task_ParseJSON_Message xQueueReceive wait [%d] ... \n", esp_get_free_heap_size()); xQueueReceive(ParseJSONQueueHandler, &pMqttMsg, portMAX_DELAY); printf("Task_ParseJSON_Message xQueueReceive get [%s] ... \n", pMqttMsg->allData);

cJSON *pJsonRoot = cJSON_Parse(pMqttMsg->allData);      if (pJsonRoot == NULL) {          printf("[SY] Task_ParseJSON_Message xQueueReceive not json ... \n");          goto __cJSON_Delete;      }      cJSON *pJsonParams = cJSON_GetObjectItem(pJsonRoot, "params");      if (pJsonParams == NULL) {          printf("pJsonParams NULL\r\n");          goto __cJSON_Delete;      }      cJSON *pJsonGRB = cJSON_GetObjectItem(pJsonParams, "RGB");      if (pJsonGRB == NULL) goto __cJSON_Delete;      cJSON *pJSON_Item_Red = cJSON_GetObjectItem(pJsonGRB, "R");      cJSON *pJSON_Item_Gree = cJSON_GetObjectItem(pJsonGRB, "G");      cJSON *pJSON_Item_Blue = cJSON_GetObjectItem(pJsonGRB, "B");      set_rgb(pJSON_Item_Red->valueint, pJSON_Item_Gree->valueint, pJSON_Item_Blue->valueint);      if (WS2812_RGB.red != 0 && WS2812_RGB.green != 0 && WS2812_RGB.blue != 0) {          uart_write_bytes(UART_NUM_1, "AT+PLAY=21\r\n", 13);      } else if (WS2812_RGB.red != 254 && WS2812_RGB.green != 254 && WS2812_RGB.blue != 254) {          uart_write_bytes(UART_NUM_1, "AT+PLAY=22\r\n", 13);      }      __cJSON_Delete:      cJSON_Delete(pJsonRoot);  }

}