uart_set_pin(UART_NUM_2, GPIO_NUM_16, GPIO_NUM_17, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE); uart_driver_install(UART_NUM_0, BUF_SIZE * 2, BUF_SIZE * 2, 20, &uart0_queue, 0); uart_driver_install(UART_NUM_1, BUF_SIZE * 2, BUF_SIZE * 2, 20, &uart1_queue, 0); uar...
22 case UART_FIFO_OVF: 23 ESP_LOGI(TAG, "hw fifo overflow\n"); 24 //If fifo overflow happened, you should consider adding flow control for your application. 25 //We can read data out out the buffer, or directly flush the rx buffer. 26 uart_flush(uart_num); 27 break; 28 //Even...
(UART_NUM, data, event.size, pdMS_TO_TICKS(10)); // 处理或打印接收到的数据 printf("Received data: %.*s ", event.size, data); break; case UART_FIFO_OVF: ESP_LOGE(TAG, "UART FIFO overflow"); uart_flush_input(UART_NUM); xQueueReset(uart_event_queue); break; default: break; ...
intuart_read_bytes(uart_port_tuart_num,void*buf,uint32_tlength, TickType_t ticks_to_wait);//参数 : uart_num:串口编号 可查看uart.h,进行选择// buf:接收数组名// length:接收到的数据长度// ticks_to_wait:读取等待的RTOS滴答个数//返回 : -1:表示错误// 其他:表示从uart的接收fifo读取到的...
串行通信由每个 UART 控制器的有限状态机 (FSM) 控制。发送数据的过程分为以下步骤: 1. 将数据写入 Tx FIFO 缓冲区 2. FSM 序列化数据 3. FSM 发送数据 接收数据的过程类似,只是步骤相反: FSM 处理且并行化传入的串行流 FSM 将数据写入 Rx FIFO 缓冲区 从Rx FIFO 缓冲区读取数据 应用程序参考读写缓冲区...
case UART_FIFO_OVF: ESP_LOGI(TAG, "hw fifo overflow"); // If fifo overflow happened, you should consider adding flow control for your application. // The ISR has already reset the rx FIFO, // As an example, we directly flush the rx buffer here in order to read more data. ...
{switch(event.type) {caseUART_DATA://接收到数据//读取接收的数据uart_read_bytes(UART_NUM_1, data,event.size, portMAX_DELAY);//返回接收的数据uart_write_bytes(UART_NUM_1, (constchar*) data,event.size);break;caseUART_FIFO_OVF://FIFO溢出(建议加上数据流控制)uart_flush_input(UART_NUM_1...
含义:指定一个指针,用于存储创建的UART事件队列的句柄。这样,用户可以在其他部分的代码中使用这个队列句柄来接收和处理UART事件。 他里面的取值如下: typedefenum{UART_DATA,/*!< UART data event*/UART_BREAK,/*!< UART break event*/UART_BUFFER_FULL,/*!< UART RX buffer full event*/UART_FIFO_OVF,/*...
caseUART_FIFO_OVF://FIFO溢出(建议加上数据流控制)uart_flush_input(UART_NUM_1);xQueueReset(QueueHandle_t_uart1);break;caseUART_BUFFER_FULL://接收缓存满(建议加大缓存BUF_SIZE)uart_flush_input(UART_NUM_1);xQueueReset(QueueHandle_t_uart1);break;caseUART_BREAK://检测到接收数据中断break;case...
esp32c3 gpio输入模式,1UARTEcho应用例程解读此示例演示了“ESP32如何通过UART接口将接收到的数据回传给对端设备”。主要突出uart_write_bytes()和uart_read_bytes()这两个API用法。#include<stdio.h>//C语言头文件#include"freertos/FreeRTOS.h"//FreeRTOS