直接使用 IDFV4.33的SDK直接在Arduino中开发，以下代码测试成功。通过FreeRTOS创建多任务，RX和TX分别在两个任务中互不影响。同时测试了ESP_LOG相关函数和设置 代码如下。
#include <stdint.h>#include <string.h>#include <stdbool.h>#include <inttypes.h>#include <functional>//#include "HardwareSerial.h"#include "soc/rtc_wdt.h"#include "freertos/FreeRTOS.h"#include "freertos/task.h"#include "esp_system.h"#include "esp_adc_cal.h"#include "esp_task_wdt.h" //设置看门狗用#include "esp_err.h"#include "esp_system.h"#include "esp_log.h"#include "driver/uart.h"#include "driver/gpio.h"#define BTN_STOP_ALARM 0#defineLED_D412#defineLED_D513#defineTXD10#defineRXD11#define ToggleOutput(out) do { digitalWrite(out, !digitalRead(out)); } while(0)#define ToggleOutBlink(out,interval) do {static uint32_t estp=0;if( (millis()-estp)>=interval ){ estp=millis();digitalWrite(out, !digitalRead(out));} } while(0)#define LOG_LOCAL_LEVEL ESP_LOG_VERBOSE//要在文件或组件范围内覆盖默认的详细级别，请定义LOG_LOCAL_LEVEL宏。//串口环形缓冲区大小, 可修改static const int RX_BUF_SIZE = 1024;//uart tx和rx, 可以修改#define TXD_PIN (GPIO_NUM_0)#define RXD_PIN (GPIO_NUM_1)//vTaskDelay(pdMS_TO_TICKS(100));//等待系统初始化static const char *RX_TASK_TAG = "RX_TASK";static const char *TX_TASK_TAG = "TX_TASK";//串口初始化void uart_init(void) {//uart配置参数const uart_config_t uart_config = {//波特率.baud_rate = 115200,//数据位.data_bits = UART_DATA_8_BITS,//校验位.parity = UART_PARITY_DISABLE,//停止位.stop_bits = UART_STOP_BITS_1,//硬件流控模式.flow_ctrl = UART_HW_FLOWCTRL_DISABLE,//时钟源.source_clk = UART_SCLK_APB,};//安装uart驱动, 配置UART RX 环形缓冲区大小, 不设置TX 环形缓冲区, 不设置UART 事件队列, 不设置中断uart_driver_install(UART_NUM_1, RX_BUF_SIZE * 2, 0, 0, NULL, 0);//配置uart参数uart_param_config(UART_NUM_1, &uart_config);//配置uart引脚uart_set_pin(UART_NUM_1, TXD_PIN, RXD_PIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);}//uart 发送线程 测试OKstatic void tx_task(void *arg){while (1) {//往UART_NUM_1发送"Hello world"uart_write_bytes(UART_NUM_1, "Hello world!\n", strlen("Hello world!\n"));ESP_LOGI(TX_TASK_TAG, "Send %d bytes: '%s'", strlen("Hello world!\n"), "");//延时2000msvTaskDelay(2000 / portTICK_PERIOD_MS);//ToggleOutput(LED_D4);}}//uart 接收线程/*如果不再需要Rx FIFO缓冲区中的数据，则可以通过调用清除缓冲区uart_flush()。在读取数据之前，您可以调用来检查Rx FIFO缓冲区中可用的字节数uart_get_buffered_data_len()，然后再读取相应的内容，这样就不会造成不必要的阻塞。下面给出了使用这些功能的示例。// Read data from UART.const int uart_num = UART_NUM_2;uint8_t data[128];int length = 0;ESP_ERROR_CHECK(uart_get_buffered_data_len(uart_num, (size_t*)&length));length = uart_read_bytes(uart_num, data, length, 100); */static void rx_task(void *arg){//动态分配内存datauint8_t* data = (uint8_t*) malloc(RX_BUF_SIZE+1);int Alength = 0;ESP_LOGE(RX_TASK_TAG, "RX Loop Start..........'");while (1) {//任务线程创建后就在循环内等待字节接收//从UART_NUM_1接收数据到data, 最大接收RX_BUF_SIZE个数据, 超时时长1000ms ESP_ERROR_CHECK(uart_get_buffered_data_len(UART_NUM_1, (size_t*)&Alength)); ESP_LOGI(RX_TASK_TAG, "uart_get_buffered_data_len %d bytes\n", Alength);if (Alength>0) {ToggleOutput(LED_D5);const int rxBytes = uart_read_bytes(UART_NUM_1, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);if (rxBytes > 0) {//字符串结束符0data[rxBytes] = 0;//字符串打印接收数据ESP_LOGI(RX_TASK_TAG, "Read %d bytes: '%s'", rxBytes, data);//16进制打印接收数据ESP_LOG_BUFFER_HEXDUMP(RX_TASK_TAG, data, rxBytes, ESP_LOG_INFO);}}else vTaskDelay(0);// 1/portTICK_RATE_MS 去掉将阻塞loop！loop内的函数无法运行(ilde 没有空余时间了！)！但是其他Task线程会照常运行！但是实时性增强了！}//动态释放内存datafree(data);ESP_LOGE(RX_TASK_TAG, "RX Loop Exit..........'");}void setup() {pinMode(LED_D4, OUTPUT); pinMode(LED_D5, OUTPUT); esp_log_level_set(RX_TASK_TAG, ESP_LOG_INFO);// enable INFO logs from DHCP client esp_log_level_set(TX_TASK_TAG, ESP_LOG_INFO);// enable INFO logs from DHCP client //串口初始化uart_init();//创建并启动串口接收线程rx_taskxTaskCreate(rx_task, "uart_rx_task", 1024*2, NULL, configMAX_PRIORITIES, NULL);//创建并启动串口发送线程tx_taskxTaskCreate(tx_task, "uart_tx_task", 1024*2, NULL, configMAX_PRIORITIES-1, NULL);}void loop() {ToggleOutBlink(LED_D4,1000);}
