STM32H750 SAI问题

发布于 2019-08-13 11:49:19 浏览：4253 订阅该版

11 个回答

戎传林 2019-08-13

这家伙很懒，什么也没写！

戎传林 2019-08-13

这家伙很懒，什么也没写！

SPI 里面DMA配置如下：
void HAL_SAI_MspInit(SAI_HandleTypeDef* hsai)
{

GPIO_InitTypeDef GPIO_InitStruct;
/* SAI1 */
    if(hsai->Instance==SAI1_Block_A)
    {
    /* Peripheral clock enable */
    if (SAI1_client == 0)
    {
       __HAL_RCC_SAI1_CLK_ENABLE();

/* Peripheral interrupt init*/
    HAL_NVIC_SetPriority(SAI1_IRQn, 1, 0);
    HAL_NVIC_EnableIRQ(SAI1_IRQn);
    }
    SAI1_client ++;
    
    /**SAI1_A_Block_A GPIO Configuration    
    PE4     ------> SAI1_FS_A
    PE5     ------> SAI1_SCK_A
    PE6     ------> SAI1_SD_A 
    */
    GPIO_InitStruct.Pin = A_LRCK_Pin|A_SCLK_Pin|A_DATA1_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF6_SAI1;
    HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

/* Peripheral DMA init*/
    
    hdma_sai1_a.Instance = DMA1_Stream6;
    hdma_sai1_a.Init.Request = DMA_REQUEST_SAI1_A;
    hdma_sai1_a.Init.Direction = DMA_PERIPH_TO_MEMORY;
    hdma_sai1_a.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_sai1_a.Init.MemInc = DMA_MINC_ENABLE;
    hdma_sai1_a.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
    hdma_sai1_a.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
    hdma_sai1_a.Init.Mode = DMA_NORMAL;
    hdma_sai1_a.Init.Priority = DMA_PRIORITY_VERY_HIGH;
    hdma_sai1_a.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
    if (HAL_DMA_Init(&hdma_sai1_a) != HAL_OK)
    {
      Error_Handler();
    }

/* 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(hsai,hdmarx,hdma_sai1_a);

__HAL_LINKDMA(hsai,hdmatx,hdma_sai1_a);

}
}