[经验]

RT-Thread系统中ADC部分的配置介绍

2022-6-8 14:44:46

1653 RT-Thread adc STM32H750

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）在RT-Thread Settings文件中打开adc驱动框架支持

2）在board.h中定义与adc相关的宏

#define BSP_USING_ADC1

3）将你的adc init函数从stm32cubemx生成的stm32xxxx_hal_msp.c复制到board.c的末尾

/**
* @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 */
}

}

将 adc_config.h 的 ADC1_CONFIG 修改为

#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 函数加入定义(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。

原作者：RWZZ_6063