Rtthread学习笔记（七）RT-Thread Studio结合stm32cube ADC设备使用示例

这里直接采用rt-thread 结合stm32cube的开发方式

一、读取ADC1的4个通道

1.配置RT-Thread Settings

2.开启ADC1宏定义

3.使用STM32CUBE配置参数

void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)复制到board.c末尾处，HAL库初始化时会自动初始化该函数。

extern DMA_HandleTypeDef hdma_adc1;

void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  if(hadc->Instance==ADC1)
  {
  /* USER CODE BEGIN ADC1_MspInit 0 */

  /* USER CODE END ADC1_MspInit 0 */
    /* Peripheral clock enable */
    __HAL_RCC_ADC1_CLK_ENABLE();

    /**ADC1 GPIO Configuration
    PA6     ------> ADC1_IN6
    PA7     ------> ADC1_IN7
    PB0     ------> ADC1_IN8
    PB1     ------> ADC1_IN9
    */
    GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

    /* Peripheral DMA init*/
    hdma_adc1.Instance = DMA1_Channel1;
    hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
    hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
    hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
    hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
    hdma_adc1.Init.Mode = DMA_CIRCULAR;
    hdma_adc1.Init.Priority = DMA_PRIORITY_LOW;
    if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
    {
      Error_Handler();
    }
    __HAL_LINKDMA(hadc,DMA_Handle,hdma_adc1);

  /* USER CODE BEGIN ADC1_MspInit 1 */

  /* USER CODE END ADC1_MspInit 1 */
  }
}

4.从STM32配置工程中复制函数并在main()中初始化

void MX_ADC1_Init(void)，
void MX_DMA_Init(void)，
void MX_GPIO_Init(void)，

ADC_HandleTypeDef hadc1;
DMA_HandleTypeDef hdma_adc1;
uint16_t ADC_ConvertedValue[4];

/* ADC1 init function */
void MX_ADC1_Init(void)
{

  ADC_ChannelConfTypeDef sConfig;

    /**Common config
    */
  hadc1.Instance = ADC1;
  hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
  hadc1.Init.ContinuousConvMode = ENABLE;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.NbrOfConversion = 4;
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }

    /**Configure Regular Channel
    */
  sConfig.Channel = ADC_CHANNEL_6;
  sConfig.Rank = 1;
  sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }

    /**Configure Regular Channel
    */
  sConfig.Channel = ADC_CHANNEL_7;
  sConfig.Rank = 2;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }

    /**Configure Regular Channel
    */
  sConfig.Channel = ADC_CHANNEL_8;
  sConfig.Rank = 3;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }

    /**Configure Regular Channel
    */
  sConfig.Channel = ADC_CHANNEL_9;
  sConfig.Rank = 4;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }

}


/**
  * Enable DMA controller clock
  */
void MX_DMA_Init(void)
{
  /* DMA controller clock enable */
  __HAL_RCC_DMA1_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA1_Channel1_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);

}

/** Configure pins as
        * Analog
        * Input
        * Output
        * EVENT_OUT
        * EXTI
*/
void MX_GPIO_Init(void)
{

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

}

5.在main()中初始化，读取函数到缓冲区ADC_ConvertedValue[]

HAL_ADC_Start_DMA(&hadc1,(uint32_t*)&ADC_ConvertedValue,4);

#include 
#include 
#include 
#include "app_uart2.h"
#define DBG_TAG "main"
#define DBG_LVL DBG_LOG
#include 
#include "app_adc1.h"
/* PLEASE DEFINE the LED0 pin for your board, such as: PA5 */
#define LED0_PIN    GET_PIN(B, 0)

int main(void)
{
    //CreatUart2TestEntry();
    int count = 1;
    /* set LED0 pin mode to output */
    rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
    MX_GPIO_Init();
    MX_DMA_Init();
    MX_ADC1_Init();
    HAL_ADC_Start_DMA(&hadc1,(uint32_t*)&ADC_ConvertedValue,4);
    /*关闭DMA中断*/
    HAL_NVIC_DisableIRQ(DMA1_Channel1_IRQn);

    while (count++)
    {
        rt_pin_write(LED0_PIN, count % 2);
        rt_thread_mdelay(2000);
        rt_kprintf("adc value1 = %d,adc value2 = %d,adc value3 = %d,adc value4 = %d\r\n",ADC_ConvertedValue[0],ADC_ConvertedValue[1],ADC_ConvertedValue[2],ADC_ConvertedValue[3]);
    }
    return RT_EOK;
}

二、验证