int uart_register_driver(struct uart_driver *drv); 返回值:0,成功;负值,失败。 retval = tty_register_driver(normal); error = register_chrdev_region(dev, driver->num, driver->name);//也是通过字符设备驱动框架注册d = tty_register_device(driver, i,NULL); tty_register_device_attr(driver, inde...
char *out_buffer = malloc(length + 3);out_buffer = out_data;out_buffer[length] = '\0'; // add "End of chain" character/// Using direct TX macro (works like a charm…!)/* while (*out_buffer) {// Send character on UARTIOWR_ALTERA_AVALON_UART_TXDATA...
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Rx 环形缓冲区的大小事件队列句柄和大...
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...
需要发送的数据指针,需要使用dma_malloc申请,或者全局变量 size 需要发送的数据长度 返回值 等于发送的长度tx_size:ok,<0:error 1.4.1.7.uart_wait_tx_idle 等待串口发送完成,不允许在中断函数使用 原型: s32uart_wait_tx_idle(uart_devuart_num,u32timeout_ms); ...
ESP_ERROR_CHECK(uart_set_pin(UART_NUM_2, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, 18, 19)); 1. 2. 3 安装uart驱动 使用uart_driver_install()函数安装,函数原型如下: esp_err_t uart_driver_install(uart_port_t uart_num, int rx_buffer_size, int tx_buffer_size, int queue_size, Queue...
typedefenum{UART_BAUDRATE_300 =0, UART_BAUDRATE_600, UART_BAUDRATE_1200, UART_...
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GPIO5上。
You can use this module to access the UART and enable the driver to operate a UART-compliant device. The functions in this module help you to obtain and release the UART device handle, read and write data, obtain and set the baud rate and device attributes. Since: 1.0 Summary Files File...
ESP_ERROR_CHECK(uart_driver_install(UART_NUM_2, uart_buffer_size, \ uart_buffer_size, 10, &uart_queue, 0)); 1. 2. 3. 4. 5. 6. 这一步完成后,你可以连接外部UART设备并检查通信。 运行UART通信 串行通信由每个UART控制器的有限状态机(FSM)控制。