表13.3.2.5 函数uart_get_buffered_data_len ()形参描述 返回值:ESP_OK表示设置成功,ESP_FAIL表示设置失败。 5,接收数据 该函数从UART 接收缓冲区中读取数据,其函数原型如下所示: intuart_read_bytes(uart_port_tuart_num, void *buf, uint32_t length, TickType_t ticks_to_wait) 该函数的形参描述,如下...
接收缓冲区中读取数据，其函数原型如下所示：int uart_read_bytes(uart_port_t uart_num,void *buf,...
5，接收数据该函数从UART接收缓冲区中读取数据，其函数原型如下所示：int uart_read_bytes(uart_port_t...
4、简单示例,实现 USB-Serial 与硬件串口 UART0 之间的双向数据转发。 voidsetup(){ Serial.begin(115200); Serial0.begin(115200); }voidloop(){// 如果USB虚拟串口有数据,则转发到硬件串口UART0if(Serial.available() >0) { Serial0.write(Serial.read()); }// 如果硬件串口UART0有数据,则转发到USB虚...
uart_read_bytes(UART_NUM_1, uart_data, event.size, portMAX_DELAY); //接收串口数据 send(tcp_sock, uart_data, event.size, 0); //发送数据到网口 break; default: ESP_LOGI(TAG, "其他串口事件,事件类型:%d", event.type); break; } } } vTaskDelete...
src->bytes_in_buffer = insize; src->next_input_byte = (const JOCTET *) inbuffer; } 这里面重点是两个函数:fill_mem_input_buffer和skip_input_data,前者用于从内存填充数据给libjpeg,后者用于跳过一定字节的数据。这两个函数请看本例程源码(在mjpeg.c里面)。 第三步,读取文件参数。通过jpeg_read_head...
My custom board has a USB-C plug connected to the D+/D- pins and uses the Serial/JTAG interface. The current implementation communicates with the PC-side daemon by using a AT protocol and uses getchar to read bytes from the serial interface. ...
delay(DELAYVAL); // Pause before next pass through loop #endif //LED #ifdef LED led_toggle(); #endif //蓝牙ble相关 #ifdef BLE //-创建ble设备 BLEDevice::init("ESP BLE Uart"); //-创建ble服务端 p_ble_server = BLEDevice::createServer(); p_ble_server->setCallbacks(new BLE_Server...
writel((readl(S3C64XX_GPNPUD) &~(0x3<<14)),S3C64XX_GPNPUD); //设置EINT7高电平触发中断 writel((readl(S3C64XX_EINT0CON0) & ~(0x7 <<12)) | (0x1 << 12), S3C64XX_EINT0CON0); /* EINT7 to high level triggered */ ...
UART int len = uart_read_bytes(ECHO_UART_PORT_NUM, data, (BUF_SIZE - 1), 100); uart_write_bytes(ECHO_UART_PORT_NUM, (const char *) data, len); // Write data back to the UART // if (len) { data[len] = '\0'; ESP_LOGI(TAG, "Recv str: %s", (char *) data); } }...