抄一下usart6_init

Author: LJW0401

bsp/boards/bsp_usart.c

@@ -3,10 +3,69 @@
 
 extern UART_HandleTypeDef huart1;
 extern DMA_HandleTypeDef hdma_usart1_tx;
+extern DMA_HandleTypeDef hdma_usart1_rx;
 extern UART_HandleTypeDef huart6;
 extern DMA_HandleTypeDef hdma_usart6_rx;
 extern DMA_HandleTypeDef hdma_usart6_tx;
 
+void usart1_init(uint8_t *rx1_buf, uint8_t *rx2_buf, uint16_t dma_buf_num)
+{
+
+    //enable the DMA transfer for the receiver and tramsmit request
+    //使能DMA串口接收和发送
+    SET_BIT(huart1.Instance->CR3, USART_CR3_DMAR);
+    SET_BIT(huart1.Instance->CR3, USART_CR3_DMAT);
+
+    //enalbe idle interrupt
+    //使能空闲中断
+    __HAL_UART_ENABLE_IT(&huart1, UART_IT_IDLE);
+
+
+
+    //disable DMA
+    //失效DMA
+    __HAL_DMA_DISABLE(&hdma_usart1_rx);
+    
+    while(hdma_usart1_rx.Instance->CR & DMA_SxCR_EN)
+    {
+        __HAL_DMA_DISABLE(&hdma_usart1_rx);
+    }
+
+    __HAL_DMA_CLEAR_FLAG(&hdma_usart1_rx, DMA_LISR_TCIF1);
+
+    hdma_usart1_rx.Instance->PAR = (uint32_t) & (USART1->DR);
+    //memory buffer 1
+    //内存缓冲区1
+    hdma_usart1_rx.Instance->M0AR = (uint32_t)(rx1_buf);
+    //memory buffer 2
+    //内存缓冲区2
+    hdma_usart1_rx.Instance->M1AR = (uint32_t)(rx2_buf);
+    //data length
+    //数据长度
+    __HAL_DMA_SET_COUNTER(&hdma_usart1_rx, dma_buf_num);
+
+    //enable double memory buffer
+    //使能双缓冲区
+    SET_BIT(hdma_usart1_rx.Instance->CR, DMA_SxCR_DBM);
+
+    //enable DMA
+    //使能DMA
+    __HAL_DMA_ENABLE(&hdma_usart1_rx);
+
+
+    //disable DMA
+    //失效DMA
+    __HAL_DMA_DISABLE(&hdma_usart1_tx);
+
+    while(hdma_usart1_tx.Instance->CR & DMA_SxCR_EN)
+    {
+        __HAL_DMA_DISABLE(&hdma_usart1_tx);
+    }
+
+    hdma_usart1_tx.Instance->PAR = (uint32_t) & (USART1->DR);
+
+}
+
 void usart1_tx_dma_init(void)
 {