请教stm32h7B0 SAI+DMA无法进DMA中断的问题。

mars1479 · 发表于 2025-2-10 15:45:15

void MX_SAI2_Init(void)
{
  HAL_SAI_DeInit(&SAI2B_RX_Handler); //清除以前的配置

  SAI2B_RX_Handler.Instance = SAI2_Block_B;
  SAI2B_RX_Handler.Init.Protocol = SAI_FREE_PROTOCOL; //自由协议(支持I2S/LSB/MSB/TDM/PCM/DSP等协议)
  SAI2B_RX_Handler.Init.AudioMode = SAI_MODEMASTER_RX;
  SAI2B_RX_Handler.Init.Synchro = SAI_ASYNCHRONOUS;
  SAI2B_RX_Handler.Init.OutputDrive = SAI_OUTPUTDRIVE_DISABLE; //SAI_OUTPUTDRIVE_ENABLE; //立即驱动音频模块输出;
  SAI2B_RX_Handler.Init.NoDivider = SAI_MASTERDIVIDER_ENABLE; //使能主时钟分频器(MCKDIV)
  SAI2B_RX_Handler.Init.FIFOThreshold = SAI_FIFOTHRESHOLD_EMPTY; //SAI_FIFOTHRESHOLD_EMPTY;  //SAI_FIFOTHRESHOLD_FULL
  SAI2B_RX_Handler.Init.AudioFrequency = SAI_AUDIO_FREQUENCY_48K;
  SAI2B_RX_Handler.Init.SynchroExt = SAI_SYNCEXT_DISABLE;
  SAI2B_RX_Handler.Init.MonoStereoMode = SAI_STEREOMODE;       //立体声模式
  SAI2B_RX_Handler.Init.CompandingMode = SAI_NOCOMPANDING;
  SAI2B_RX_Handler.Init.TriState = SAI_OUTPUT_NOTRELEASED;

  //帧设置
  SAI2B_RX_Handler.FrameInit.FrameLength=128;                //设置帧长度为32,左通道16个SCK,右通道16个SCK.
  SAI2B_RX_Handler.FrameInit.ActiveFrameLength=16;          //设置帧同步有效电平长度,在I2S模式下=1/2帧长.
  SAI2B_RX_Handler.FrameInit.FSDefinition=SAI_FS_STARTFRAME;  //SAI_FS_CHANNEL_IDENTIFICATION;//FS信号为SOF信号+通道识别信号
  SAI2B_RX_Handler.FrameInit.FSPolarity=SAI_FS_ACTIVE_LOW; //FS低电平有效(下降沿)
  SAI2B_RX_Handler.FrameInit.FSOffset=SAI_FS_FIRSTBIT;  //SAI_FS_BEFOREFIRSTBIT; //在slot0的第一位的前一位使能FS,以匹配飞利浦标准

  //SLOT设置
  SAI2B_RX_Handler.SlotInit.FirstBitOffset=0;             //slot偏移(FBOFF)为0
  SAI2B_RX_Handler.SlotInit.SlotSize=SAI_SLOTSIZE_16B;    //slot大小为16位
  SAI2B_RX_Handler.SlotInit.SlotNumber=8;                   //slot数为8个
  SAI2B_RX_Handler.SlotInit.SlotActive=SAI_SLOTACTIVE_0|SAI_SLOTACTIVE_1|SAI_SLOTACTIVE_2|SAI_SLOTACTIVE_3|SAI_SLOTACTIVE_4|SAI_SLOTACTIVE_5|SAI_SLOTACTIVE_6|SAI_SLOTACTIVE_7;

  if (HAL_SAI_InitProtocol(&SAI2B_RX_Handler, SAI_I2S_STANDARD, SAI_PROTOCOL_DATASIZE_16BIT, 8) != HAL_OK)
  {
   Error_Handler();
  }
}

static uint32_t SAI2_client =0;
static uint32_t FMC_Initialized = 0;

void HAL_SAI_MspInit(SAI_HandleTypeDef* saiHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};

  if (FMC_Initialized)
  {
return;
  }
  FMC_Initialized = 1;

  /* SAI2 */
  if(saiHandle->Instance==SAI2_Block_B)
  {
/* SAI2 clock enable */

// Initializes the peripherals clock
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_SAI2B;
PeriphClkInitStruct.Sai2BClockSelection = RCC_SAI2BCLKSOURCE_PLL;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
   Error_Handler();
}

if (SAI2_client == 0)
{
   __HAL_RCC_SAI2_CLK_ENABLE();
}
SAI2_client ++;

/**SAI2_B_Block_B GPIO Configuration
PC0    ------> SAI2_FS_B
PA0    ------> SAI2_SD_B
PA2    ------> SAI2_SCK_B
*/
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF8_SAI2;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF10_SAI2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

GPIO_InitStruct.Pin = GPIO_PIN_2;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF8_SAI2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

/* Peripheral DMA init*/
SAI2B_RXhdma_Handler.Instance = DMA1_Stream0;
SAI2B_RXhdma_Handler.Init.Request = DMA_REQUEST_SAI2_B;
SAI2B_RXhdma_Handler.Init.Direction = DMA_PERIPH_TO_MEMORY;
SAI2B_RXhdma_Handler.Init.PeriphInc = DMA_PINC_DISABLE;
SAI2B_RXhdma_Handler.Init.MemInc = DMA_MINC_ENABLE;
SAI2B_RXhdma_Handler.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
SAI2B_RXhdma_Handler.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
SAI2B_RXhdma_Handler.Init.Mode = DMA_CIRCULAR;
SAI2B_RXhdma_Handler.Init.Priority = DMA_PRIORITY_LOW;
SAI2B_RXhdma_Handler.Init.FIFOMode = DMA_FIFOMODE_ENABLE;  //DMA_FIFOMODE_DISABLE;  //DMA_FIFOMODE_ENABLE;
SAI2B_RXhdma_Handler.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_1QUARTERFULL;
SAI2B_RXhdma_Handler.Init.MemBurst = DMA_MBURST_SINGLE;
SAI2B_RXhdma_Handler.Init.PeriphBurst = DMA_PBURST_SINGLE;

HAL_DMA_DeInit(&SAI2B_RXhdma_Handler);
if (HAL_DMA_Init(&SAI2B_RXhdma_Handler) != HAL_OK)
{
   Error_Handler();
}

__HAL_LINKDMA(&SAI2B_RX_Handler,hdmarx,SAI2B_RXhdma_Handler);
__HAL_LINKDMA(&SAI2B_RX_Handler,hdmatx,SAI2B_RXhdma_Handler);

HAL_DMA_RegisterCallback(&SAI2B_RXhdma_Handler, HAL_DMA_XFER_CPLT_CB_ID, BSP_SAI_REC_M0_RX_Callback);
HAL_DMA_RegisterCallback(&SAI2B_RXhdma_Handler, HAL_DMA_XFER_M1CPLT_CB_ID, BSP_SAI_REC_M1_RX_Callback);

//用不到的中断可以直接关闭
//DMA1_Stream1->CR &= ~DMA_IT_DME;
//DMA1_Stream1->CR &= ~DMA_IT_TE;
}
}

static uint32_t FMC_DeInitialized = 0;

void HAL_SAI_MspDeInit(SAI_HandleTypeDef* saiHandle)
{

  /* USER CODE END FMC_MspDeInit 0 */
  if (FMC_DeInitialized) {
return;
  }
  FMC_DeInitialized = 1;

/* SAI2 */
if(saiHandle->Instance==SAI2_Block_B)
{
   SAI2_client --;
   if (SAI2_client == 0)
   {
      /* Peripheral clock disable */
      __HAL_RCC_SAI2_CLK_DISABLE();
      HAL_NVIC_DisableIRQ(SAI2_IRQn);
   }

/**SAI2_B_Block_B GPIO Configuration
PC0    ------> SAI2_FS_B
PA0    ------> SAI2_SD_B
PA2    ------> SAI2_SCK_B
*/
HAL_GPIO_DeInit(GPIOC, GPIO_PIN_0);
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_0|GPIO_PIN_2);

HAL_DMA_DeInit(saiHandle->hdmarx);
HAL_DMA_DeInit(saiHandle->hdmatx);
}
}

//SAI开始播放
void SAI_REC_Start(void)
{
HAL_DMA_DeInit(SAI2B_RX_Handler.hdmarx);
__HAL_DMA_DISABLE(&SAI2B_RXhdma_Handler);                      //先关闭接收DMA
HAL_Delay(1);                                                 //10us延时，防止-O2优化出问题

/* Change the DMA state */
SAI2B_RXhdma_Handler.State = HAL_DMA_STATE_READY;

//开启双缓冲,及缓冲区的大小
HAL_DMAEx_MultiBufferStart_IT(&SAI2B_RXhdma_Handler, (uint32_t)&SAI2B_RX_Handler.Instance->DR, (uint32_t)sai_rec_buf1, (uint32_t)sai_rec_buf2, 8); //SAI_RX_DMA_BUF_SIZE/2);

/* Several peripheral DMA handle pointers point to the same DMA handle.
   Be aware that there is only one channel to perform all the requested DMAs. */
__HAL_LINKDMA(&SAI2B_RX_Handler,hdmarx,SAI2B_RXhdma_Handler);
__HAL_LINKDMA(&SAI2B_RX_Handler,hdmatx,SAI2B_RXhdma_Handler);

__HAL_DMA_ENABLE_IT(&SAI2B_RXhdma_Handler, DMA_IT_TC);
__HAL_DMA_ENABLE_IT(&SAI2B_RXhdma_Handler, DMA_IT_HT);

//开启 DMA1 Stream1 的中断
HAL_NVIC_SetPriority(DMA1_Stream0_IRQn, 0x02, 0);
HAL_NVIC_EnableIRQ(DMA1_Stream0_IRQn);

__HAL_SAI_ENABLE(&SAI2B_RX_Handler);    //使能SAI
HAL_Delay(1);
__HAL_DMA_ENABLE(&SAI2B_RXhdma_Handler);  //开启DMA RX传输
}

mars1479 · 发表于 2025-2-10 15:46:43

SAI_BDR可以看到数据，但DMA不进中断，麻烦高手帮忙看看是什么原因。

sy2009 · 发表于 2025-2-10 16:42:53

ram的地址有关系有些ram地址不支持dma

mars1479 · 发表于 2025-2-10 17:57:11

sy2009 发表于 2025-2-10 16:42
ram的地址有关系有些ram地址不支持dma

__attribute__((section (".RAM_D1"))) uint16_t sai_rec_buf1[0x800]; /* 数据缓存区0 */
__attribute__((section (".RAM_D1"))) uint16_t sai_rec_buf2[0x800]; /* 数据缓存区1 */

AXI RAM可以吗？需要什么特别的配置吗？

mars1479 · 发表于 2025-2-10 18:21:44

static void MPU_Config(void)
{
MPU_Region_InitTypeDef MPU_InitStruct;

/* 禁止 MPU */
HAL_MPU_Disable();

/* 配置AXI SRAM的MPU属性为Write back, Read allocate，Write allocate */
MPU_InitStruct.Enable          = MPU_REGION_ENABLE;
MPU_InitStruct.BaseAddress    = 0x24000000;
MPU_InitStruct.Size          = MPU_REGION_SIZE_512KB;
MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
MPU_InitStruct.IsBufferable    = MPU_ACCESS_BUFFERABLE;
MPU_InitStruct.IsCacheable    = MPU_ACCESS_CACHEABLE;
MPU_InitStruct.IsShareable    = MPU_ACCESS_SHAREABLE;  //MPU_ACCESS_NOT_SHAREABLE;
MPU_InitStruct.Number          = MPU_REGION_NUMBER0;
MPU_InitStruct.TypeExtField    = MPU_TEX_LEVEL1;
MPU_InitStruct.SubRegionDisable = 0x00;
MPU_InitStruct.DisableExec    = MPU_INSTRUCTION_ACCESS_ENABLE;

HAL_MPU_ConfigRegion(&MPU_InitStruct);

/* 配置SRAM1的属性为Write through, read allocate，no write allocate */
MPU_InitStruct.Enable          = MPU_REGION_ENABLE;
MPU_InitStruct.BaseAddress    = 0x30000000;
MPU_InitStruct.Size          = ARM_MPU_REGION_SIZE_128KB;
MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
MPU_InitStruct.IsBufferable    = MPU_ACCESS_NOT_BUFFERABLE;
MPU_InitStruct.IsCacheable    = MPU_ACCESS_CACHEABLE;
MPU_InitStruct.IsShareable    = MPU_ACCESS_NOT_SHAREABLE;
MPU_InitStruct.Number          = MPU_REGION_NUMBER2;
MPU_InitStruct.TypeExtField    = MPU_TEX_LEVEL0;
MPU_InitStruct.SubRegionDisable = 0x00;
MPU_InitStruct.DisableExec    = MPU_INSTRUCTION_ACCESS_ENABLE;

HAL_MPU_ConfigRegion(&MPU_InitStruct);

/*使能 MPU */
HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);
}

没有开CACHE。

eric2013 · 发表于 2025-2-11 06:27:07

sy2009 发表于 2025-2-10 16:42
ram的地址有关系有些ram地址不支持dma

这种设置是可以的，注意看MAP文件，确定没有被分配到TCM RAM，这个不支持通用DMA

wenjing · 发表于昨天 17:13

可以去调试里看一下申请的内存区域有没有成功
建议检查一下参考手册（RM0455），看看这块总线能不能访问到

wenjing · 发表于昨天 17:15

这是rm0455里h7b0的示意图

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[SAI/I2S] 请教stm32h7B0 SAI+DMA无法进DMA中断的问题。

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