[STM32F1] 我的ADC直输出2~8或者4088~4095

/**

  ******************************************************************************

  * [url=home.php?mod=space&uid=288409]@file[/url]    ADC/ADC_RegularConversion_DMA/Src/main.c

  * [url=home.php?mod=space&uid=187600]@author[/url]  MCD Application Team

  * [url=home.php?mod=space&uid=895143]@version[/url] V1.0.0

  * [url=home.php?mod=space&uid=212281]@date[/url]    25-June-2015

  * [url=home.php?mod=space&uid=247401]@brief[/url]   This example describes how to use the DMA to transfer

  *          continuously converted data.

  ******************************************************************************

  * @attention

  *

  * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2>

  *

  * Redistribution and use in source and binary forms, with or without modification,

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  *   3. Neither the name of STMicroelectronics nor the names of its contributors

  *      may be used to endorse or promote products derived from this software

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  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

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  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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  */



/* Includes ------------------------------------------------------------------*/

#include "main.h"



/** @addtogroup STM32F7xx_HAL_Examples

  * @{

  */



/** @addtogroup ADC_RegularConversion_DMA

  * @{

  */



/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/

/* Private macro -------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

/* ADC handler declaration */

ADC_HandleTypeDef    AdcHandle;



/* Variable used to get converted value */

__IO uint16_t uhADCxConvertedValue = 0;



/* Private function prototypes -----------------------------------------------*/

void SystemClock_Config(void);

static void Error_Handler(void);

static void MPU_Config(void);

static void CPU_CACHE_Enable(void);



/* Private functions ---------------------------------------------------------*/



/**

  * @brief  Main program.

  * @param  None

  * @retval None

  */

int main(void)

{

  ADC_ChannelConfTypeDef sConfig;



  /* Configure the MPU attributes as Write Through */

  MPU_Config();



  /* Enable the CPU Cache */

  CPU_CACHE_Enable();



  /* STM32F7xx HAL library initialization:

       - Configure the Flash prefetch

       - Systick timer is configured by default as source of time base, but user 

         can eventually implement his proper time base source (a general purpose 

         timer for example or other time source), keeping in mind that Time base 

         duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and 

         handled in milliseconds basis.

       - Set NVIC Group Priority to 4

       - Low Level Initialization

     */

  HAL_Init();



  /* Configure the system clock to 216 MHz */

  SystemClock_Config();



  /* Configure LED1 */

  BSP_LED_Init(LED1);





  /*##-1- Configure the ADC peripheral #######################################*/

  AdcHandle.Instance          = ADCx;

  

  AdcHandle.Init.ClockPrescaler        = ADC_CLOCKPRESCALER_PCLK_DIV4;

  AdcHandle.Init.Resolution            = ADC_RESOLUTION_12B;

  AdcHandle.Init.ScanConvMode          = DISABLE;                       /* Sequencer disabled (ADC conversion on only 1 channel: channel set on rank 1) */

  AdcHandle.Init.ContinuousConvMode    = ENABLE;                        /* Continuous mode disabled to have only 1 conversion at each conversion trig */

  AdcHandle.Init.DiscontinuousConvMode = DISABLE;                       /* Parameter discarded because sequencer is disabled */

  AdcHandle.Init.NbrOfDiscConversion   = 0;

  AdcHandle.Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIGCONVEDGE_NONE;        /* Conversion start trigged at each external event */

  AdcHandle.Init.ExternalTrigConv      = ADC_EXTERNALTRIGCONV_T1_CC1;

  AdcHandle.Init.DataAlign             = ADC_DATAALIGN_RIGHT;

  AdcHandle.Init.NbrOfConversion       = 1;

  AdcHandle.Init.DMAContinuousRequests = ENABLE;

  AdcHandle.Init.EOCSelection          = DISABLE;







  if (HAL_ADC_Init(&AdcHandle) != HAL_OK)

  {

    /* ADC initialization Error */

    Error_Handler();

  }



  /*##-2- Configure ADC regular channel ######################################*/

  sConfig.Channel      = ADC_CHANNEL_8;

  sConfig.Rank         = 1;

  sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;

  sConfig.Offset       = 0;



  if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK)

  {

    /* Channel Configuration Error */

    Error_Handler();

  }





  /*##-3- Start the conversion process #######################################*/

  if(HAL_ADC_Start_DMA(&AdcHandle, (uint32_t*)&uhADCxConvertedValue, 1) != HAL_OK)

  {

    /* Start Conversation Error */

    Error_Handler();

  }



  /* Infinite loop */

  while (1)

  {

    if (uhADCxConvertedValue > 2700)

    {

      BSP_LED_Off(LED1);

    }

    else

    {

      BSP_LED_On(LED1);

    }

  }

}



/**

  * @brief  System Clock Configuration

  *         The system Clock is configured as follow : 

  *            System Clock source            = PLL (HSE)

  *            SYSCLK(Hz)                     = 216000000

  *            HCLK(Hz)                       = 216000000

  *            AHB Prescaler                  = 1

  *            APB1 Prescaler                 = 4

  *            APB2 Prescaler                 = 2

  *            HSE Frequency(Hz)              = 25000000

  *            PLL_M                          = 25

  *            PLL_N                          = 432

  *            PLL_P                          = 2

  *            PLL_Q                          = 9

  *            VDD(V)                         = 3.3

  *            Main regulator output voltage  = Scale1 mode

  *            Flash Latency(WS)              = 7

  * @param  None

  * @retval None

  */

void SystemClock_Config(void)

{

  RCC_ClkInitTypeDef RCC_ClkInitStruct;

  RCC_OscInitTypeDef RCC_OscInitStruct;

  HAL_StatusTypeDef ret = HAL_OK;



  /* Enable HSE Oscillator and activate PLL with HSE as source */

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;

  RCC_OscInitStruct.HSEState = RCC_HSE_ON;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;

  RCC_OscInitStruct.PLL.PLLM = 25;

  RCC_OscInitStruct.PLL.PLLN = 432;

  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;

  RCC_OscInitStruct.PLL.PLLQ = 9;

  

  ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);

  if(ret != HAL_OK)

  {

    while(1) { ; }

  }

  

  /* Activate the OverDrive to reach the 216 MHz Frequency */  

  ret = HAL_PWREx_EnableOverDrive();

  if(ret != HAL_OK)

  {

    while(1) { ; }

  }

  

  /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */

  RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;

  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;  

  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; 

  

  ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7);

  if(ret != HAL_OK)

  {

    while(1) { ; }

  }  

}



/**

  * @brief  This function is executed in case of error occurrence.

  * @param  None

  * @retval None

  */

static void Error_Handler(void)

{

  while (1)

  {

    /* LED1 blinks */

    BSP_LED_Toggle(LED1);

    HAL_Delay(20);

  }

}



/**

  * @brief  Conversion complete callback in non blocking mode

  * @param  AdcHandle : AdcHandle handle

  * [url=home.php?mod=space&uid=536309]@NOTE[/url]   This example shows a simple way to report end of conversion, and

  *         you can add your own implementation.

  * @retval None

  */

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* AdcHandle)

{

  /* Turn LED1 on: Transfer process is correct */

  BSP_LED_On(LED1);

}



#ifdef  USE_FULL_ASSERT



/**

  * @brief  Reports the name of the source file and the source line number

  *         where the assert_param error has occurred.

  * @param  file: pointer to the source file name

  * @param  line: assert_param error line source number

  * @retval None

  */

void assert_failed(uint8_t *file, uint32_t line)

{

  /* User can add his own implementation to report the file name and line number,

     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */



  /* Infinite loop */

  while (1)

  {

  }

}



#endif



/**

  * @brief  Configure the MPU attributes as Write Through for SRAM1/2.

  * @note   The Base Address is 0x20010000 since this memory interface is the AXI.

  *         The Region Size is 256KB, it is related to SRAM1 and SRAM2  memory size.

  * @param  None

  * @retval None

  */

static void MPU_Config(void)

{

  MPU_Region_InitTypeDef MPU_InitStruct;

  

  /* Disable the MPU */

  HAL_MPU_Disable();



  /* Configure the MPU attributes as WT for SRAM */

  MPU_InitStruct.Enable = MPU_REGION_ENABLE;

  MPU_InitStruct.BaseAddress = 0x20010000;

  MPU_InitStruct.Size = MPU_REGION_SIZE_256KB;

  MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;

  MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;

  MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;

  MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;

  MPU_InitStruct.Number = MPU_REGION_NUMBER0;

  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;

  MPU_InitStruct.SubRegionDisable = 0x00;

  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;



  HAL_MPU_ConfigRegion(&MPU_InitStruct);



  /* Enable the MPU */

  HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);

}



/**

  * @brief  CPU L1-Cache enable.

  * @param  None

  * @retval None

  */

static void CPU_CACHE_Enable(void)

{

  /* Enable I-Cache */

  SCB_EnableICache();



  /* Enable D-Cache */

  SCB_EnableDCache();

}



/**

  * @}

  */



/**

  * @}

  */



/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/