3. 设置通信管脚uart_set_pin() 参数顺序: Tx,Rx,RTS,CTS。 保持不变的参数,使用宏: UART_PIN_NO_CHANGE 使用示例: // 设置TX=IO4, RX=IO5, RTS=IO18, CTS=IO19ESP_ERROR_CHECK(uart_set_pin(UART_NUM_2,4,5,18,19)); 4. 安装驱动程序uart_driver_install() 参数: - Tx 环形缓冲区的大小...
.stop_bits = UART_STOP_BITS_1, // 停止位 .flow_ctrl = UART_HW_FLOWCTRL_DISABLE, // 硬件流控 }; uart_param_config(UART_NUM_0, &uart0_config); // 设置串口 // IO映射-> T:IO1 R:IO3 uart_set_pin(UART_NUM_0, TXD0_PIN, RXD0_PIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE)...
esp_err_t uart_driver_delete(uart_port_t uart_num) 说明:卸载UART驱动 返回:ESP_OK 成功 ESP_FAIL 参数错误 参数:uart_num:UART端口数,最大端口数是UART_NUM_MAX-1 esp_err_t uart_set_pin(uart_port_t uart_num, int tx_io_num, int rx_io_num, int rst_io_num, int cst_io_num) 说明:...
esp_err_t uart_set_pin(uart_port_t uart_num, int tx_io_num, int rx_io_num, int rts_io_num, int cts_io_num) 参数说明: uart_port_t uart_num:串口号,支持 UART_NUM_0,UART_NUM_1,UART_NUM_2 int tx_io_num:串口接收管脚 int rx_io_num:串口发送管脚 int rts_io_num:串口流控脚 ...
ESP-IDF 编程指南——UART 二、API说明 以下UART 接口位于driver/include/driver/uart.h。 2.1 uart_param_config 2.2 uart_driver_install 2.3 uart_read_bytes 2.4 uart_write_bytes 2.5 uart_set_pin ESP32的串口是支持引脚映射的,比如我的开发板串口一默认的是GPIO9和GPIO10,现在将TX、RX映射到GPIO4和GPIO...
// Set UART pins(TX: IO16 (UART2 default), RX: IO17 (UART2 default), RTS: IO18, CTS: IO19) ESP_ERROR_CHECK(uart_set_pin(UART_NUM_2, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, 18, 19)); 驱动程序安装 完成驱动程序配置后,我们可以通过调用 uart_driver_install()来安装 UART 驱动....
uart_set_pin(UART_NUM_0, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);设置串口的发送接受引脚,本例程采用默认配置。 uart_driver_install(UART_NUM_0, BUF_SIZE * 2, BUF_SIZE * 2, 20, &uart0_queue, 0); ...
ESP_ERROR_CHECK(uart_set_pin(UART_NUM_2, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, 18, 19)); 驱动安装 一旦驱动的配置完成,我们调用uart_driver_install()来安装驱动。作为结果,串口需要的一些资源将会被配置。资源的类型/大小会被函数调用的参数制定和关注: ...
{ uart_config_t uart_config = { .baud_rate = 115200, .data_bits = UART_DATA_8_BITS, .parity = UART_PARITY_DISABLE, .stop_bits = UART_STOP_BITS_1, .flow_ctrl = UART_HW_FLOWCTRL_DISABLE }; uart_param_config(EX_UART_NUM, &uart_config); uart_set_pin(EX_UART_NUM, UART_PIN_...
// 引脚绑定uart_set_pin(UART_NUM_1, TX_PIN, RX_PIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE); 3、 注册uart中断驱动(配置可选) 通过注册uart中断,可以不用开一个任务实时的去读取串口,判断串口有没有数据发送过来,提高系统实时性。 中断驱动uart_driver_install函数参数说明如下: ...