【STM32F407IGT6】串口通信

一.CUBE设置注意这里要重新映射USART1的引脚否则串口助手无法接收数据1.普通发送/* USER CODE BEGIN 2 */ //uint8_t test[50]holow world; uint8_t j[3]{0x11,0x12,0x13}; uint8_t test[] 123\r\n; /* USER CODE END 2 */ /* USER CODE BEGIN 3 */ HAL_UART_Transmit(huart1, test, sizeof(test)-1, 1000); HAL_Delay(1000); } /* USER CODE END 3 */现象隔段时间接收数字1232.中断发送没有间隔时间HAL_UART_Transmit_IT(huart1, test, strlen((char*)test));3.DMA发送接收1定时发送hollow world/* USER CODE BEGIN PV */ uint8_t test[50]hollow world; /* USER CODE END PV */ /* USER CODE BEGIN 3 */ HAL_UART_Transmit_DMA(huart1, test, strlen((char*)test)); HAL_Delay(1000);2DMA接收并返回定长数组/* USER CODE BEGIN 2 */ uint8_t test[32]; /* USER CODE END 2 */ HAL_UART_Receive_DMA(huart1, test, sizeof(test)); HAL_Delay(1000); HAL_UART_Transmit_DMA(huart1, test, strlen((char*)test));现象不断的返回值并且不只返回了上次发送的值还返回了以前发送的值4.空闲中断DMA接收不定长数组代码参考【STM32F407VGT6】8.5点灯串口通信_ag32vf407vgt6-CSDN博客同时该函数可以实现发送LED ON/OFF 打开/关闭 小灯