uart_read_bytes(uart_num, dtmp, event->size, portMAX_DELAY); uart_write_bytes(uart_num, (const char *) dtmp, event->size); break; //Event of HW FIFO overflow detected case UART_FIFO_OVF: // If fifo overflow hap
uart_flush_input(EX_UART_NUM); xQueueReset(uart0_queue); break; //Event of UART RX break detected case UART_BREAK: ESP_LOGI(TAG, "uart rx break"); break; //Event of UART parity check error case UART_PARITY_ERR: ESP_LOGI(TAG, "uart parity error"); break; //Event of UART frame...
一帧数据接收结束并不认为是UART_RX break。一帧数据的结束通常是由停止位标识的。UART_RX break事件...
uart_param_config(UART_NUM_0, &uart_config); // 设置UART1使用的TX和RX引脚 uart_set_pin(UART_NUM_0, TX_PIN, RX_PIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE); // 安装UART驱动程序,使用默认缓冲区大小 uart_driver_install(UART_NUM_0, BUF_SIZE * 2, BUF_SIZE * 2, 0, NULL, 0);...
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: esp_err_tuart_driver_install(uart_port_tuart_num,intrx_buffer_size,inttx_buffer_size,intqueue_size, QueueHandle_t *uart_queue,intintr_alloc_flags);//...
我当前使用的是ESP-IDF.当uart接收不定长的数据时,希望通过空闲中断或者事件的方式来结束一帧uart数据的接收。我看了\esp-idf-v4.4\examples\peripherals\uart\uart_events ,我当前有3个疑问。 1.event.type的UART_BREAK如何理解?注释写的是Event of UART RX break detected ,什么情况认为是UART RX break,能否...
buffer.33uart_flush(uart_num);34break;35//Event of UART RX break detected36caseUART_BREAK:37ESP_LOGI(TAG,"uart rx break\n");38break;39//Event of UART parity check error40caseUART_PARITY_ERR:41ESP_LOGI(TAG,"uart parity error\n");42break;43//Event of UART frame error44caseUART_...
example, we directly flush the rx buffer here in order to read more data.uart_flush_input(EX_UART_NUM);xQueueReset(uart_queue);break;//Event of UART RX break detectedcaseUART_BREAK:ESP_LOGI(TAG,"uart rx break");break;//Event of UART parity check errorcaseUART_PARITY_ERR:ESP_LOGI(...
函数uart_write_bytes_with_break()类似于uart_write_bytes(),但会在传输结束时添加一个串行中断信号“串行中断信号”是指将发送线路保持在较低的位置一段时间超过一个数据帧。 另一个将数据写入Tx FIFO缓冲区的函数是uart_tx_chars()。与uart_write_bytes()不同,这个函数在空间可用之前不会阻塞。相反,它将写...
.stop_bits = UART_STOP_BITS_1, .flow_ctrl = UART_HW_FLOWCTRL_DISABLE, .source_clk = UART_SCLK_APB, };// We won't use a buffer for sending data.uart_driver_install(UART_NUM_1, RX_BUF_SIZE *2,0,0,NULL,0); uart_param_config(UART_NUM_1, &uart_config); ...