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STM32F7 Discovery Board ADC+DMA Problem

Question asked by Mucit23 on Dec 30, 2015
Latest reply on Mar 22, 2018 by Mary Solomo
Hi There

I have started to play with stm32f7 discovery board. I would like to run ADC+DMA on the stm32f7 discovey board. But I can not run. please help me. 

This is my main code
/**
  ******************************************************************************
  * @file    Templates/Src/main.c
  * @author  MCD Application Team
  * @version V1.0.1
  * @date    21-September-2015
  * @brief   STM32F7xx ADC+DMA Example Project
  ******************************************************************************
  */
     
/* Includes ------------------------------------------------------------------*/
#include "main.h"
 
/** @addtogroup STM32F7xx_HAL_Examples
  * @{
  */
 
/** @addtogroup Templates
  * @{
  */
 
/* Private typedef -----------------------------------------------------------*/
  ADC_HandleTypeDef    AdcHandle;
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Variable used to get converted value */
__IO uint16_t uhADCxConvertedValue = 0;
/* Private function prototypes -----------------------------------------------*/
static void ADC_Config(void);
static void LCD_Config(void);
static 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)
{
  char text[20];
  /* Configure the MPU attributes as Write Through */
  MPU_Config();
 
  /* Enable the CPU Cache */
  CPU_CACHE_Enable();
 
  /* Low Level Initialization*/
  HAL_Init();
 
  /* Configure the System clock to have a frequency of 216 MHz */
  SystemClock_Config();
   
  BSP_LED_Init(LED1);
     
    LCD_Config();
         
    BSP_LED_Init(LED1);
     
    ADC_Config();
 
  /* Infinite loop */
  BSP_LCD_SelectLayer(1);//Fore Ground Layer selected
    BSP_LCD_Clear(LCD_COLOR_WHITE);
    BSP_LCD_SetFont(&Font16);
    BSP_LCD_SetTextColor(LCD_COLOR_RED);
    BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
  BSP_LCD_DisplayStringAtLine(8, (uint8_t*)"Stm32F429Disco ADC Test");
     
  while (1)
  {
        sprintf(text,"ADC=%ld",(long)uhADCxConvertedValue);
        BSP_LCD_DisplayStringAtLine(9,(uint8_t*)text);
  }
}
 
static void ADC_Config(void)
{
  ADC_ChannelConfTypeDef sConfig;
     
      /*##-1- Configure the ADC peripheral #######################################*/
  AdcHandle.Instance          = ADC3;
   
  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();
  }
 
}
 
 
/**
  * @brief  LCD configuration
  * @param  None
  * @retval None
  */
static void LCD_Config(void)
{
  /* LCD Initialization */
  BSP_LCD_Init();
 
  /* LCD Initialization */
  BSP_LCD_LayerDefaultInit(0, LCD_FB_START_ADDRESS);
  BSP_LCD_LayerDefaultInit(1, LCD_FB_START_ADDRESS+(BSP_LCD_GetXSize()*BSP_LCD_GetYSize()*4));
 
  /* Enable the LCD */
  BSP_LCD_DisplayOn();
   
  /* Select the LCD Background Layer  */
  BSP_LCD_SelectLayer(0);
 
  /* Clear the Background Layer */
  BSP_LCD_Clear(LCD_COLOR_WHITE); 
   
  /* Select the LCD Foreground Layer  */
  BSP_LCD_SelectLayer(1);
 
  /* Clear the Foreground Layer */
  BSP_LCD_Clear(LCD_COLOR_WHITE);
   
  /* Configure the transparency for foreground and background :
     Increase the transparency */
  BSP_LCD_SetTransparency(0, 0);
  BSP_LCD_SetTransparency(1, 255);
}
 
/**
  * @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
  */
static void SystemClock_Config(void)
{
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_OscInitTypeDef RCC_OscInitStruct;
 
  /* Enable HSE Oscillator and activate PLL with HSE as source */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.HSIState = RCC_HSI_OFF;
  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;
  if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
 
  /* activate the OverDrive to reach the 216 Mhz Frequency */
  if(HAL_PWREx_EnableOverDrive() != HAL_OK)
  {
    Error_Handler();
  }
   
  /* 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; 
  if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7) != HAL_OK)
  {
    Error_Handler();
  }
}
 
 
/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
static void Error_Handler(void)
{
  /* User may add here some code to deal with this error */
  while(1)
  {
  }
}
 
/**
  * @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();
}
 
#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
 
 
 
/**
  * @}
  */
 
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

and this is my stm32f7xx_hal_msp.c file

/**
  ******************************************************************************
  * @file    stm32f7xx_hal_msp.c
  * @author  MCD Application Team
  * @version V1.0.1
  * @date    21-September-2015
  * @brief   HAL MSP module.
  *          This file template is located in the HAL folder and should be copied
  *          to the user folder.
  *        
  @verbatim
 ===============================================================================
                     ##### How to use this driver #####
 ===============================================================================
    [..]
    This file is generated automatically by STM32CubeMX and eventually modified
    by the user
 
  @endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * 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
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */
 
/* Includes ------------------------------------------------------------------*/
#include "stm32f7xx_hal.h"
#include "main.h"
/** @addtogroup STM32F7xx_HAL_Driver
  * @{
  */
 
/** @defgroup HAL_MSP
  * @brief HAL MSP module.
  * @{
  */
 
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
 
/** @defgroup HAL_MSP_Private_Functions
  * @{
  */
     
void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)
{
  GPIO_InitTypeDef          GPIO_InitStruct;
  static DMA_HandleTypeDef  hdma_adc;
    BSP_LED_On(LED1);
  /*##-1- Enable peripherals and GPIO Clocks #################################*/
  /* ADC3 Periph clock enable */
  ADCx_CLK_ENABLE();
  /* Enable GPIO clock ****************************************/
  ADCx_CHANNEL_GPIO_CLK_ENABLE();
  /* Enable DMA2 clock */
  DMAx_CLK_ENABLE();
 
  /*##-2- Configure peripheral GPIO ##########################################*/
  /* ADC Channel GPIO pin configuration */
  GPIO_InitStruct.Pin = ADCx_CHANNEL_PIN;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(ADCx_CHANNEL_GPIO_PORT, &GPIO_InitStruct);
 
  /*##-3- Configure the DMA streams ##########################################*/
  /* Set the parameters to be configured */
  hdma_adc.Instance = ADCx_DMA_STREAM;
 
  hdma_adc.Init.Channel  = ADCx_DMA_CHANNEL;
  hdma_adc.Init.Direction = DMA_PERIPH_TO_MEMORY;
  hdma_adc.Init.PeriphInc = DMA_PINC_DISABLE;
  hdma_adc.Init.MemInc = DMA_MINC_ENABLE;
  hdma_adc.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
  hdma_adc.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
  hdma_adc.Init.Mode = DMA_CIRCULAR;
  hdma_adc.Init.Priority = DMA_PRIORITY_HIGH;
  hdma_adc.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
  hdma_adc.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_HALFFULL;
  hdma_adc.Init.MemBurst = DMA_MBURST_SINGLE;
  hdma_adc.Init.PeriphBurst = DMA_PBURST_SINGLE;
 
  HAL_DMA_Init(&hdma_adc);
 
  /* Associate the initialized DMA handle to the ADC handle */
  __HAL_LINKDMA(hadc, DMA_Handle, hdma_adc);
 
  /*##-4- Configure the NVIC for DMA #########################################*/
  /* NVIC configuration for DMA transfer complete interrupt */
  HAL_NVIC_SetPriority(ADCx_DMA_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(ADCx_DMA_IRQn);
}
 
/**
  * @brief  Initializes the Global MSP.
  * @param  None
  * @retval None
  */
void HAL_MspInit(void)
{
  /* NOTE : This function is generated automatically by STM32CubeMX and eventually 
            modified by the user
   */
 
     
}
 
/**
  * @brief  DeInitializes the Global MSP.
  * @param  None 
  * @retval None
  */
void HAL_MspDeInit(void)
{
  /* NOTE : This function is generated automatically by STM32CubeMX and eventually 
            modified by the user
   */
}
 
/**
  * @}
  */
 
/**
  * @}
  */
 
/**
  * @}
  */
 
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

I checked the DMA interrupt. DMA interrupt occurs continuously. But uhADCxConvertedValue is always zero.  

Also I can reading the ADC Value with the HAL_ADC_GetValue() function. 

What could be the cause of the problem?

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