FW_H7 V1.12.1-HAL库DMA双缓冲配置

talk is cheap 提问时间：2025-8-14 19:39 / 未解决

问答
是否解决:	未解决

硬件平台：H750-ART-Pi
软件平台：CubeMX+HAL库 V1.12.1版本

问题背景：需要使用定时器触发DMA-SPI向外部DAC发送数据，由于需要向外部发送的数据量较大且配置SPI总线的多通道，当前需要使用DMA双缓冲配置（从SD卡中读取BIN文件依次填充PingPong-FIFO，使用外扩SDRAM作为DMA-BUF）
遇到的问题：当前已经能够使用单缓冲+定时器触发的方式来向外发送数据，使用双缓冲时，无反应（定时器在工作，当前网络上的一些例程都是基于标准库的，参考作用有限），想求助下HAL库DMA双缓冲案例或者函数调用顺序。
详情参考gitee链接：GIt-CubeMX配置
启动定时器部分代码：HAL_DMAEx_MultiBufferStart_IT这个函数应该是DMA双缓冲的关键但是开启后无效，即使单缓冲正常工作下也无法看到SPI_TXDR更新，很奇怪

void BSP_DAC_SPI_DMA_Start()
{
LookUP_BUF_INIT();
// HAL_DMAEx_MultiBufferStart(&hspi2.hdmatx, LookUP_PingPongBufer.activeBuffer, &hspi2.Instance->TXDR,LookUP_PingPongBufer.readyBuffer,BUFFER_SIZE/4);
HAL_DMAEx_MultiBufferStart_IT(&hdma_spi2_tx, LookUP_PingPongBufer.activeBuffer, &hspi2.Instance->TXDR, LookUP_PingPongBufer.readyBuffer,BUFFER_SIZE/4);
// if(HAL_SPI_Transmit_DMA(&hspi2, (uint8_t*)LookUP_PingPongBufer.activeBuffer, BUFFER_SIZE/4)!= HAL_OK)
// {
// printf("BSP_DAC_SPI_DMA_Start HAL_SPI_Transmit_DMA ERROR !!! \r\n");
// }
if(HAL_TIM_OC_Start(&htim12, TIM_CHANNEL_1) != HAL_OK)
{
printf("BSP_DAC_SPI_DMA_Start HAL_TIM_OC_Start ERROR !!! \r\n");
}
}
void LookUP_BUF_INIT(void)
{
FRESULT result;
uint32_t bw;
char path[64];
PingPong_Init(&LookUP_PingPongBufer,LOOKUP_BUF1_ADDR,LOOKUP_BUF2_ADDR);
result = f_mount(&fs, DiskPath, 0); /* Mount a logical drive */
if (result != FR_OK)
{
printf("mount fs failed !!\r\n", FR_Table[result]);
}
sprintf(path, "%sTable_hex.bin", DiskPath);
result = f_open(&file, path, FA_OPEN_EXISTING | FA_READ);
if (result != FR_OK)
{
printf("Don't Find File : Table_hex\r\n");
return;
}
result = f_read(&file, LookUP_PingPongBufer.activeBuffer , BUFFER_SIZE, &bw);
if (bw > 0)
{
FsReadBuf[bw] = 0;
}
result = f_read(&file, LookUP_PingPongBufer.readyBuffer , BUFFER_SIZE, &bw);
if (bw > 0)
{
FsReadBuf[bw] = 0;
}
// f_close(&file);
// f_mount(NULL, DiskPath, 0);
}

复制代码

定时器初始化部分代码：

void MX_SPI2_Init(void)
{
/* USER CODE BEGIN SPI2_Init 0 */
/* USER CODE END SPI2_Init 0 */
/* USER CODE BEGIN SPI2_Init 1 */
/* USER CODE END SPI2_Init 1 */
hspi2.Instance = SPI2;
hspi2.Init.Mode = SPI_MODE_MASTER;
hspi2.Init.Direction = SPI_DIRECTION_2LINES;
hspi2.Init.DataSize = SPI_DATASIZE_32BIT;
hspi2.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi2.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi2.Init.NSS = SPI_NSS_SOFT;
hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_4;
hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi2.Init.CRCPolynomial = 0x0;
hspi2.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;
hspi2.Init.NSSPolarity = SPI_NSS_POLARITY_LOW;
hspi2.Init.FifoThreshold = SPI_FIFO_THRESHOLD_01DATA;
hspi2.Init.TxCRCInitializationPattern = SPI_CRC_INITIALIZATION_ALL_ZERO_PATTERN;
hspi2.Init.RxCRCInitializationPattern = SPI_CRC_INITIALIZATION_ALL_ZERO_PATTERN;
hspi2.Init.MasterSSIdleness = SPI_MASTER_SS_IDLENESS_00CYCLE;
hspi2.Init.MasterInterDataIdleness = SPI_MASTER_INTERDATA_IDLENESS_00CYCLE;
hspi2.Init.MasterReceiverAutoSusp = SPI_MASTER_RX_AUTOSUSP_DISABLE;
hspi2.Init.MasterKeepIOState = SPI_MASTER_KEEP_IO_STATE_DISABLE;
hspi2.Init.IOSwap = SPI_IO_SWAP_DISABLE;
if (HAL_SPI_Init(&hspi2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SPI2_Init 2 */
/* USER CODE END SPI2_Init 2 */
}
void HAL_SPI_MspInit(SPI_HandleTypeDef* spiHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
HAL_DMA_MuxSyncConfigTypeDef pSyncConfig= {0};
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
if(spiHandle->Instance==SPI2)
{
/* USER CODE BEGIN SPI2_MspInit 0 */
/* USER CODE END SPI2_MspInit 0 */
/** Initializes the peripherals clock
*/
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_SPI2;
PeriphClkInitStruct.Spi123ClockSelection = RCC_SPI123CLKSOURCE_CLKP;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
Error_Handler();
}
/* SPI2 clock enable */
__HAL_RCC_SPI2_CLK_ENABLE();
__HAL_RCC_GPIOI_CLK_ENABLE();
/**SPI2 GPIO Configuration
PI1 ------> SPI2_SCK
PI2 ------> SPI2_MISO
PI3 ------> SPI2_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);
/* SPI2 DMA Init */
/* SPI2_TX Init */
hdma_spi2_tx.Instance = DMA1_Stream0;
hdma_spi2_tx.Init.Request = DMA_REQUEST_SPI2_TX;
hdma_spi2_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_spi2_tx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_spi2_tx.Init.MemInc = DMA_MINC_ENABLE;
hdma_spi2_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
hdma_spi2_tx.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
hdma_spi2_tx.Init.Mode = DMA_CIRCULAR;
hdma_spi2_tx.Init.Priority = DMA_PRIORITY_LOW;
hdma_spi2_tx.Init.FIFOMode = DMA_FIFOMODE_ENABLE;
hdma_spi2_tx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
hdma_spi2_tx.Init.MemBurst = DMA_MBURST_SINGLE;
hdma_spi2_tx.Init.PeriphBurst = DMA_PBURST_SINGLE;
if (HAL_DMA_Init(&hdma_spi2_tx) != HAL_OK)
{
Error_Handler();
}
pSyncConfig.SyncSignalID = HAL_DMAMUX1_SYNC_TIM12_TRGO;
pSyncConfig.SyncPolarity = HAL_DMAMUX_SYNC_RISING;
pSyncConfig.SyncEnable = ENABLE;
pSyncConfig.EventEnable = ENABLE;
pSyncConfig.RequestNumber = 1;
if (HAL_DMAEx_ConfigMuxSync(&hdma_spi2_tx, &pSyncConfig) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(spiHandle,hdmatx,hdma_spi2_tx);
/* SPI2 interrupt Init */
HAL_NVIC_SetPriority(SPI2_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(SPI2_IRQn);
/* USER CODE BEGIN SPI2_MspInit 1 */
// HAL_DMAEx_MultiBufferStart_IT(&hdma_spi2_tx, (uint8_t*)LookUP_PingPongBufer.activeBuffer, (uint32_t)hspi2.Instance->TXDR, (uint8_t*)LookUP_PingPongBufer.readyBuffer,1000);
/* USER CODE END SPI2_MspInit 1 */
}
}