stm32h743 uart3 dma 配置

发布于 2021-04-13 15:26:16 浏览：1560 订阅该版

使用STM32H743 IIT6 原子阿波罗板子,BSP 使用的是RTT 网站的V4.02 版，配置的KConfig 文件添加模块如下：
   menu "SERIAL_INFO module"
    config RT_USING_SERIALINFO
        bool  "Enable SERIAL_INFO module"
        default y
        help
        this hello module only used for tset
    config  SERIAL_INFO_name 
        string  "SERIAL_INFO name"
        default  "SERIAL_INFO"
    config  SERIAL_INFO_VALUE 
        int  "SERIAL_INFO value"
        default  8
    config  BSP_UART3_RX_USING_DMA
        bool  "Enable BSP_UART3_RX_USING_DMA_Module"
        default y
        endmenu 
        添加了 UART3 的DMA 模块，
        打开生成的MDK 工程，在drv_usart.c中有如下语句：
        #ifdef BSP_UART3_RX_USING_DMA
    uart_obj[UART3_INDEX].uart_dma_flag |= RT_DEVICE_FLAG_DMA_RX;
    static struct dma_config uart3_dma_rx = UART3_DMA_RX_CONFIG;
    uart_config[UART3_INDEX].dma_rx = &uart3_dma_rx;
#endif
在drv_dma.h 中有如下的结构定义
struct dma_config {
    DMA_INSTANCE_TYPE *Instance;
    rt_uint32_t dma_rcc;
    IRQn_Type dma_irq;

#if defined(SOC_SERIES_STM32F2) || defined(SOC_SERIES_STM32F4) || defined(SOC_SERIES_STM32F7)
    rt_uint32_t channel;
#endif

#if defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32G0) || defined(SOC_SERIES_STM32G4)
    rt_uint32_t request;
#endif
};
问题如下：
因为使用的是stm32h743 ，所以并没有定义   rt_uint32_t channel;
所以如此配置，编译工程会出现
..\libraries\HAL_Drivers\drv_usart.c(922): error:  #136: struct "dma_config"  has no field "channel" 
因为在 uart_config.h 中
#ifndef UART3_DMA_RX_CONFIG
#define UART3_DMA_RX_CONFIG                                            \
    {                                                               \
        .Instance = UART3_RX_DMA_INSTANCE,                         \
        .channel = UART3_RX_DMA_CHANNEL,                           \
        .dma_rcc = UART3_RX_DMA_RCC,                               \
        .dma_irq = UART3_RX_DMA_IRQ,                               \
    }
   此结构中有  .channel ，所以会出现此问题，
   请问各位高手，此问题该如何解决呢？谢谢！

flashman2002 2021-04-13

这家伙很懒，什么也没写！

flashman2002 2021-04-13

这家伙很懒，什么也没写！

kingchunhai 2021-04-13

这家伙很懒，什么也没写！

flashman2002 2021-04-13

这家伙很懒，什么也没写！

kingchunhai 2021-04-13

这家伙很懒，什么也没写！

kingchunhai 2021-04-14

这家伙很懒，什么也没写！

kingchunhai 2021-04-14

这家伙很懒，什么也没写！

还是不太明白 ，使用CUBEMX 生成的关于DMA 方面的代码如下：
```
static void MX_DMA_Init(void)
{
  /* DMA controller clock enable */
  __HAL_RCC_DMA1_CLK_ENABLE();

/* Configure DMA request hdma_dma_generator0 on DMA1_Stream0 */
  hdma_dma_generator0.Instance = DMA1_Stream0;
  hdma_dma_generator0.Init.Request = DMA_REQUEST_GENERATOR0;
  hdma_dma_generator0.Init.Direction = DMA_PERIPH_TO_MEMORY;
  hdma_dma_generator0.Init.PeriphInc = DMA_PINC_DISABLE;
  hdma_dma_generator0.Init.MemInc = DMA_MINC_ENABLE;
  hdma_dma_generator0.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
  hdma_dma_generator0.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
  hdma_dma_generator0.Init.Mode = DMA_NORMAL;
  hdma_dma_generator0.Init.Priority = DMA_PRIORITY_LOW;
  hdma_dma_generator0.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
  if (HAL_DMA_Init(&hdma_dma_generator0) != HAL_OK)
  {
    Error_Handler( );
  }

/* Configure DMA request hdma_dma_generator1 on DMA1_Stream1 */
  hdma_dma_generator1.Instance = DMA1_Stream1;
  hdma_dma_generator1.Init.Request = DMA_REQUEST_GENERATOR1;
  hdma_dma_generator1.Init.Direction = DMA_PERIPH_TO_MEMORY;
  hdma_dma_generator1.Init.PeriphInc = DMA_PINC_DISABLE;
  hdma_dma_generator1.Init.MemInc = DMA_MINC_ENABLE;
  hdma_dma_generator1.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
  hdma_dma_generator1.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
  hdma_dma_generator1.Init.Mode = DMA_CIRCULAR;
  hdma_dma_generator1.Init.Priority = DMA_PRIORITY_LOW;
  hdma_dma_generator1.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
  if (HAL_DMA_Init(&hdma_dma_generator1) != HAL_OK)
  {
    Error_Handler( );
  }

}
```
如何使用呢？谢谢

kingchunhai 2021-04-14

这家伙很懒，什么也没写！

上面的不对，使用CUBEMX 配置串口3 并使用DMA 配置后在stm32h7xx_hal_msp.c中生成的代码如下
```
void HAL_USART_MspInit(USART_HandleTypeDef* husart)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(husart->Instance==USART3)
  {
  /* USER CODE BEGIN USART3_MspInit 0 */

/* USER CODE END USART3_MspInit 0 */
    /* Peripheral clock enable */
    __HAL_RCC_USART3_CLK_ENABLE();

__HAL_RCC_GPIOB_CLK_ENABLE();
    /**USART3 GPIO Configuration
    PB10     ------> USART3_TX
    PB11     ------> USART3_RX
    PB12     ------> USART3_CK
    */
    GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF7_USART3;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

/* USART3 DMA Init */
    /* USART3_RX Init */
    hdma_usart3_rx.Instance = DMA1_Stream2;
    hdma_usart3_rx.Init.Request = DMA_REQUEST_USART3_RX;
    hdma_usart3_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
    hdma_usart3_rx.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_usart3_rx.Init.MemInc = DMA_MINC_ENABLE;
    hdma_usart3_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
    hdma_usart3_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
    hdma_usart3_rx.Init.Mode = DMA_NORMAL;
    hdma_usart3_rx.Init.Priority = DMA_PRIORITY_LOW;
    hdma_usart3_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
    if (HAL_DMA_Init(&hdma_usart3_rx) != HAL_OK)
    {
      Error_Handler();
    }

__HAL_LINKDMA(husart,hdmarx,hdma_usart3_rx);

/* USER CODE BEGIN USART3_MspInit 1 */

/* USER CODE END USART3_MspInit 1 */
  }

}

```
接下来如何配置呢？