STM32L4R5ZIT6用DMA把存储器里的数据发往串口的·问题

chenbingjy

我试图用STM32L4R5ZIT6的DMA功能把存储器里的数据发往串口1
用串口可以发数据：、
比如这句：

1. HAL_UART_Transmit(&huart1,buffer,1,1000);

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用这句就不行：

1. HAL_UART_Transmit_DMA(&huart1, (uint8_t *)Buffer, 4);

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我的DMA配置函数如下：

1. static void DMA_Config(void)
   
2. {
   
3.   /*## -1- Enable DMA1 clock #################################################*/
   
4.   __HAL_RCC_DMA1_CLK_ENABLE();
   
5. 
   
6.   /*##-2- Select the DMA functional Parameters ###############################*/
   
7.   DmaHandle.Init.Direction = DMA_MEMORY_TO_PERIPH ;          /* M2M transfer mode                */
   
8.   DmaHandle.Init.PeriphInc = DMA_PINC_DISABLE;               /* Peripheral increment mode Enable */
   
9.         //DmaHandle.Init.PeriphInc = DMA_PINC_DISABLE;      
   
10.   DmaHandle.Init.MemInc = DMA_MINC_ENABLE;                  /* Memory increment mode Enable     */
    
11.         //DmaHandle.Init.MemInc = DMA_MINC_DISABLE;  
    
12. //  DmaHandle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD; /* Peripheral data alignment : Word */
    
13. //  DmaHandle.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;    /* memory data alignment : Word     */
    
14. //  DmaHandle.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; /* Peripheral data alignment : Word */
    
15. //       
    
16. //  DmaHandle.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;    /* memory data alignment : Word     */
    
17.         DmaHandle.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE  ; /* Peripheral data alignment : Word */
    
18.   DmaHandle.Init.MemDataAlignment = DMA_PDATAALIGN_BYTE  ;    /* memory data alignment : Word     */
    
19.         DmaHandle.Init.Mode = DMA_NORMAL;                         /* Normal DMA mode                  */
    
20.   DmaHandle.Init.Priority = DMA_PRIORITY_HIGH;              /* priority level : high            */
    
21. 
    
22.   /*##-3- Select the DMA instance to be used for the transfer : DMA1_Channel1 #*/
    
23.   DmaHandle.Instance = DMA_INSTANCE;
    
24. 
    
25.   /*##-4- Initialize the DMA channel ##########################################*/
    
26.   if (HAL_DMA_Init(&DmaHandle) != HAL_OK)
    
27.   {
    
28.     /* Initialization Error */
    
29.     Error_Handler();
    
30.   }
    
31.   
    
32.   /*##-5- Select Callbacks functions called after Transfer complete and Transfer error */
    
33.   HAL_DMA_RegisterCallback(&DmaHandle, HAL_DMA_XFER_CPLT_CB_ID, TransferComplete);
    
34.   HAL_DMA_RegisterCallback(&DmaHandle, HAL_DMA_XFER_ERROR_CB_ID, TransferError);
    
35. 
    
36.   /*##-6- Configure NVIC for DMA transfer complete/error interrupts ##########*/
    
37.   /* Set Interrupt Group Priority */
    
38.   HAL_NVIC_SetPriority(DMA_INSTANCE_IRQ, 0, 0);
    
39. 
    
40.   /* Enable the DMA STREAM global Interrupt */
    
41.   HAL_NVIC_EnableIRQ(DMA_INSTANCE_IRQ);
    
42. 
    
43.   /*##-7- Start the DMA transfer using the interrupt mode ####################*/
    
44.   /* Configure the source, destination and buffer size DMA fields and Start DMA Channel transfer */
    
45.   /* Enable All the DMA interrupts */
    
46.   if (HAL_DMA_Start_IT(&DmaHandle, (uint32_t)&aSRC_Const_Buffer, (uint32_t)aDST_Buffer, 4) != HAL_OK)
    
47.   {
    
48.     /* Transfer Error */
    
49.     Error_Handler();
    
50.   }
    
51. }
    

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请高手指教，如何解决？谢谢！