RT-Thread Studio 使用笔记（七）| 配合STM32CubeMX添加裸机驱动（以ADC为例）

1. 配置STM32CubeMX

2. 复制stm32xxxx_hal_msp.c文件

将 CubeMx 生成的代码 stm32f7xx_hal_msp.c 函数复制到 RT-Thread Studio 生成的工程中，并参与工程编译：

由于我们并没有使用 CubeMx 生成的工程，所以这里需要将 stm32f7xx_hal_msp.c 文件中 #include “main.h” 替换为 #include “board.h”。

3. 修改stm32f7xx_hal_conf.h文件

4. 使用外设

上述文件配置完成之后，ADC 外设就可以使用的，在 main.c 中添加外设的使用代码：

/*
 * Copyright (c) 2006-2020, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2020-03-05     Mculover666      the first version
 */
#include <rtthread.h>
#include "board.h"

ADC_HandleTypeDef hadc1;

/* ADC1 init function */
void MX_ADC1_Init(void)
{
  /* USER CODE BEGIN ADC1_Init 0 */

  /* USER CODE END ADC1_Init 0 */

  ADC_ChannelConfTypeDef sConfig = {0};

  /* USER CODE BEGIN ADC1_Init 1 */

  /* USER CODE END ADC1_Init 1 */
  /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
  */
  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
  hadc1.Init.ContinuousConvMode = DISABLE;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.NbrOfConversion = 1;
  hadc1.Init.DMAContinuousRequests = DISABLE;
  hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
  */
  sConfig.Channel = ADC_CHANNEL_3;
  sConfig.Rank = ADC_REGULAR_RANK_1;
  sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN ADC1_Init 2 */

  /* USER CODE END ADC1_Init 2 */


}

rt_uint32_t get_adc_value(void)
{
    HAL_ADC_Start(&hadc1);
    HAL_ADC_PollForConversion(&hadc1, 100);

    return (rt_uint32_t)HAL_ADC_GetValue(&hadc1);
}
void mq2_collect_entry(void *parameter)
{
    int count = 1;
    rt_uint32_t read_value = 0;

    MX_ADC1_Init();
    while (count++)
    {
        read_value = get_adc_value();
        rt_thread_mdelay(1000);
        rt_kprintf("adc value = %d\r\n", read_value);
    }
}

/* 创建线程 */
int mq2_collect(void)
{
    rt_thread_t tid;    //线程句柄

    tid = rt_thread_create("mq2_collect",
                            mq2_collect_entry,
                            RT_NULL,
                            512,
                            9,
                            10);
   if(tid != RT_NULL)
   {
        //线程创建成功，启动线程
        rt_thread_startup(tid);
   }

   return 0;

}

/* 导出到 msh 命令列表中 */
MSH_CMD_EXPORT(mq2_collect, mq2 collect example);

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