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RT-Studio ART-Pi RT-Thread 4.1.0 ADC

发布于 2022-05-19 13:21:10 浏览：637 订阅该版

环境：studio 2.2.1 rt-thread 4.1.0  STM32H750

创建项目。根据board.h ADC 部分配置

1）open adc driver framework support in the RT-Thread Settings file
![ADC1.PNG](https://oss-club.rt-thread.org/uploads/20220519/ee6b0a78495376b42a975b957a5c8a12.png)

2) 在board.h 中 define macro related to the adc
```
#define BSP_USING_ADC1
```

3) copy your adc init function from stm32xxxx_hal_msp.c generated by stm32cubemx to the end of board.c

```
/**
* @brief ADC MSP Initialization
* This function configures the hardware resources used in this example
* @param hadc: ADC handle pointer
* @retval None
*/
void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(hadc->Instance==ADC1)
  {
  /* USER CODE BEGIN ADC1_MspInit 0 */

/* USER CODE END ADC1_MspInit 0 */
    /* Peripheral clock enable */
    __HAL_RCC_ADC12_CLK_ENABLE();

__HAL_RCC_GPIOB_CLK_ENABLE();
    /**ADC1 GPIO Configuration
    PB1     ------> ADC1_INP5
    */
    GPIO_InitStruct.Pin = GPIO_PIN_1;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

/* USER CODE BEGIN ADC1_MspInit 1 */

/* USER CODE END ADC1_MspInit 1 */
  }

}

/**
* @brief ADC MSP De-Initialization
* This function freeze the hardware resources used in this example
* @param hadc: ADC handle pointer
* @retval None
*/
void HAL_ADC_MspDeInit(ADC_HandleTypeDef* hadc)
{
  if(hadc->Instance==ADC1)
  {
  /* USER CODE BEGIN ADC1_MspDeInit 0 */

/* USER CODE END ADC1_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_ADC12_CLK_DISABLE();

/**ADC1 GPIO Configuration
    PB1     ------> ADC1_INP5
    */
    HAL_GPIO_DeInit(GPIOB, GPIO_PIN_1);

/* USER CODE BEGIN ADC1_MspDeInit 1 */

/* USER CODE END ADC1_MspDeInit 1 */
  }

}

```

修改 adc_config.h 的ADC1_CONFIG 如下
```
#define ADC1_CONFIG                                                 \
    {                                                               \
       .Instance                   = ADC1,                          \
       .Init.ClockPrescaler        = ADC_CLOCK_SYNC_PCLK_DIV4,      \
       .Init.Resolution            = ADC_RESOLUTION_12B,            \
       .Init.ScanConvMode          = DISABLE,                       \
       .Init.EOCSelection          = DISABLE,                       \
       .Init.ContinuousConvMode    = DISABLE,                       \
       .Init.NbrOfConversion       = 1,                             \
       .Init.DiscontinuousConvMode = DISABLE,                       \
       .Init.NbrOfDiscConversion   = 0,                             \
       .Init.ExternalTrigConv      = ADC_SOFTWARE_START,            \
       .Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIGCONVEDGE_NONE, \
    }
```
修改 drv_adc.c stm32_adc_enable 函数 加入 defined(SOC_SERIES_STM32H7)

```
#if defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32G0) || defined(SOC_SERIES_STM32H7)
        ADC_Enable(stm32_adc_handler);
#else
        __HAL_ADC_ENABLE(stm32_adc_handler);
#endif
    }
    else
    {
#if defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32G0) || defined(SOC_SERIES_STM32H7)
        ADC_Disable(stm32_adc_handler);
#else
        __HAL_ADC_DISABLE(stm32_adc_handler);
#endif
```

4）在stm32h7xx_hal_conf.h 中，使能 HAL_ADC_MODULE_ENABLED

```
 \ | /
- RT -     Thread Operating System
 / | \     4.1.0 build May 19 2022 12:44:32
 2006 - 2022 Copyright by RT-Thread team
[D/main] Hello RT-Thread!
msh >list_device
device           type         ref count
-------- -------------------- ----------
adc1     Miscellaneous Device 0
uart4    Character Device     2
pin      Miscellaneous Device 0
```
看到 adc1, 基本就可以了