[STM32U5] STM32U575板子DMA的问题

typedef struct{



  uint32_t BR1; //数据量



  uint32_t DAR; //填充仅需要更新目标地址



  uint32_t DSR; //填充仅需要更新目标地址



  uint32_t LLR; //数据链



}tDMA_LLS;



#define DMA_MEM_CH              GPDMA1_Channel0



#define DMA_MEM_LLS_CH              GPDMA1_Channel0

 



//tDMA_LLS DMA_MEM_LLS[MAX_LLS_ARRAY_NUM] __@0x20000000 ;

tDMA_LLS DMA_MEM_LLS[MAX_LLS_ARRAY_NUM];

/****************************************



填充一片区域,超出65535需要使用动态链表



size 是 uint32_t 的数量，按照字节数计算一个传输链



不得超出16383*4 字节



***********************************************/



static void DMA_LLS_Config ( tDMA_LLS *plls,uint32_t bytes,uint32_t dar, uint32_t sar, uint32_t lls)



{



  uint8_t max = (bytes +MAXIUM_DMA_BLOCK_SIZE-1)/MAXIUM_DMA_BLOCK_SIZE-1;



  uint8_t i =0;



  for (;i<max;i++){



    plls[i].DAR = dar +i*(MAXIUM_DMA_BLOCK_SIZE);



    //plls[i].SAR = sar +i*(MAXIUM_DMA_BLOCK_SIZE);

                plls[i].DSR = sar +i*(MAXIUM_DMA_BLOCK_SIZE);



    plls[i].BR1 = MAXIUM_DMA_BLOCK_SIZE;   //当前传输数量



    plls[i].LLR = lls|(uint16_t)(uint64_t)&plls[i+1];//指向下一个链表的低16位



  }



  plls[i].DAR = dar +i*(MAXIUM_DMA_BLOCK_SIZE); //新内存地址



  plls[i].DSR = sar +i*(MAXIUM_DMA_BLOCK_SIZE); //新内存地址



  plls[i].BR1 = bytes % MAXIUM_DMA_BLOCK_SIZE; //剩余数据量



  plls[i].LLR = 0;  //表示链表结束



}



void DmaCopyHalfWordBlock (uint32_t bytes, uint16_t * dst ,uint16_t *src)



{



  



  DMA_MEM_CH->CTR1 = DMA_CTR1_SAP|DMA_CTR1_DINC|DMA_CTR1_SINC|\



    (DMA_DEST_DATAWIDTH_HALFWORD)|(DMA_DEST_DATAWIDTH_HALFWORD);



  DMA_MEM_CH ->CTR2 = DMA_REQUEST_SW|DMA_BREQ_BLOCK|DMA_TCEM_EACH_LL_ITEM_TRANSFER;    //使用软件 DMA请求



  DMA_MEM_CH ->CSAR = (uint32_t)(uint64_t)src;



  DMA_MEM_CH ->CDAR = (uint32_t)(uint64_t)dst;







  if( bytes <=MAXIUM_DMA_BLOCK_SIZE ){



    DMA_MEM_CH ->CBR1 = bytes ;



  }



  else{



    DMA_MEM_CH ->CBR1 = MAXIUM_DMA_BLOCK_SIZE;



    uint32_t lls = DMA_CLLR_UB1|DMA_CLLR_UDA|DMA_CLLR_USA|DMA_CLLR_ULL;



    uint32_t base = (uint32_t )(uint64_t)DMA_MEM_LLS;



    DMA_MEM_CH ->CLLR = lls|(uint16_t)base;



    DMA_MEM_CH ->CLBAR = (uint32_t)base&0xffff0000; //MSB,LLS BASE



    DMA_LLS_Config ( DMA_MEM_LLS,\



      bytes - MAXIUM_DMA_BLOCK_SIZE,\



        (uint32_t)(uint64_t)dst+MAXIUM_DMA_BLOCK_SIZE,  (uint32_t)(uint64_t)src+MAXIUM_DMA_BLOCK_SIZE,lls);



  }



  //启动传输



  DMA_MEM_CH ->CCR  = DMA_CCR_EN;



}





/**

  * [url=/u/brief]@brief[/url]  The application entry point.

  * @retval int

  */

int main(void)

{



  /* USER CODE BEGIN 1 */

  /* STM32U5xx HAL library initialization:

       - Configure the Flash prefetch

       - Configure the Systick to generate an interrupt each 1 msec

       - Set NVIC Group Priority to 3

       - Low Level Initialization

     */

  /* USER CODE END 1 */



  /* MCU Configuration--------------------------------------------------------*/



  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */

  HAL_Init();



  /* USER CODE BEGIN Init */



  /* USER CODE END Init */



  /* Configure the System Power */

  SystemPower_Config();



  /* Configure the system clock */

  SystemClock_Config();

        __HAL_RCC_GPDMA1_CLK_ENABLE();

        //RCC_AHB1ENR_GPDMA1EN

        RCC_AHB1RSTR_GPDMA1RST;

  /* USER CODE BEGIN SysInit */

        handle_GPDMA1_Channel10.Instance = GPDMA1_Channel10;



  handle_GPDMA1_Channel10.Init.Request = DMA_REQUEST_SW;



  handle_GPDMA1_Channel10.Init.BlkHWRequest = DMA_BREQ_SINGLE_BURST;



  handle_GPDMA1_Channel10.Init.Direction = DMA_MEMORY_TO_MEMORY;



  handle_GPDMA1_Channel10.Init.SrcInc = DMA_SINC_FIXED;



  handle_GPDMA1_Channel10.Init.DestInc = DMA_DINC_FIXED;



  handle_GPDMA1_Channel10.Init.SrcDataWidth = DMA_SRC_DATAWIDTH_BYTE;



  handle_GPDMA1_Channel10.Init.DestDataWidth = DMA_DEST_DATAWIDTH_BYTE;



  handle_GPDMA1_Channel10.Init.Priority = DMA_LOW_PRIORITY_LOW_WEIGHT;



  handle_GPDMA1_Channel10.Init.SrcBurstLength = 1;



  handle_GPDMA1_Channel10.Init.DestBurstLength = 1;



  handle_GPDMA1_Channel10.Init.TransferAllocatedPort = DMA_SRC_ALLOCATED_PORT0|DMA_DEST_ALLOCATED_PORT0;



  handle_GPDMA1_Channel10.Init.TransferEventMode = DMA_TCEM_BLOCK_TRANSFER;



  handle_GPDMA1_Channel10.Init.Mode = DMA_NORMAL;



  if (HAL_DMA_Init(&handle_GPDMA1_Channel10) != HAL_OK)



  {



   // Error_Handler();



  }



  if (HAL_DMA_ConfigChannelAttributes(&handle_GPDMA1_Channel10, DMA_CHANNEL_NPRIV) != HAL_OK)



  {



 //    Error_Handler();



  }

  /* USER CODE END SysInit */



  /* Initialize all configured peripherals */

  //MX_GPDMA1_Init();

  MX_ICACHE_Init();

         

  /* USER CODE BEGIN 2 */

  /* Initialize LEDs */

 

  

  /* Reset transferErrorDetected to 0, it will be set to 1 if a transfer error is detected */



//  /* Reset transferCompleteDetected to 0, it will be set to 1 if a transfer is correctly completed */





//  /* Select Callbacks functions called after Transfer complete and Transfer error */





        DmaCopyHalfWordBlock (BUFFER_SIZE,(uint16_t *)aSRC_Const_Buffer1,aDST_Buffer1);

  /* Configure the source, destination and buffer size DMA fields and Start DMA Channel/Stream transfer */

  /* Enable All the DMA interrupts */

  



  /* Wait for end of transmission or an error occurred */

  

  /* USER CODE END 2 */



  /* Infinite loop */

  /* USER CODE BEGIN WHILE */

  while (1)

  {

    /* USER CODE END WHILE */



    /* USER CODE BEGIN 3 */

    HAL_Delay(250);

    BSP_LED_Toggle(LED1);

  }

  /* USER CODE END 3 */

}

DmaCopyHalfWordBlock (BUFFER_SIZE,aDST_Buffer1,(uint16_t *)aSRC_Const_Buffer1);