STM32F303 Problem Dual ADC mode with DMA

Simon G. · ‎2018-08-23

Hey,

I use 3 channels of ADC1 and 3 channels of ADC2 with an external trigger conversion source. In order to read both ADC moduls simultaneously I wanna use the dual regular simultaneous mode only with ADC1 as master and ADC2 as slave. For my configurations in CubeMX and my code please check the attached images and my code below.

When I debug and check the values of the array wert, only the wert[0] (ADC1 channel 2) and wert[3] (ADC2 channel 1) is correct. The other values of the array werte are not correct but seem to have an logic. wert[1] (ADC1 channel 3) and wert[4] (ADC2 channel 2) are nearly the same.. around 900. wert[2] (ADC1 channel 4) and wert[5] (ADC2 channel 3) are nearly the same.. around 4000.

Does anybody know the problem? Thank you for your help in advance!

To find my mistakes I configured both ADCs in independent mode and and switched them one alternately.

=> result:

ADC1: value of the first channel was correct, the values of the other two channels were like I describe above (approx. 900 and 4000) -> same problem as in dual mode

ADC2: values of all channels were ok

Therefore I had to change the code a bit:

HAL_TIM_Base_Start(&htim3);

HAL_ADC_Start(&hadc2);

HAL_ADCEx_MultiModeStart_DMA(&hadc1, (uint32_t*)adcbuffer, 6);

to.... first case with ADC1:

/* USER CODE BEGIN 0*/

uint32_t adc1buffer[3];

/* USER CODE END 0*/

/* USER CODE BEGIN 2 */

HAL_TIM_Base_Start(&htim3);

HAL_ADC_Start_DMA(&hadc1, (uint32_t *) adc1buffer,3);

/* USER CODE END 2 */

to.... second case with ADC2:

/* USER CODE BEGIN 0*/

uint32_t adc2buffer[3];

/* USER CODE END 0*/

/* USER CODE BEGIN 2 */

HAL_TIM_Base_Start(&htim3);

HAL_ADC_Start_DMA(&hadc2, (uint32_t *) adc2buffer,2);

/* USER CODE END 2 */

/**
  ******************************************************************************
  * File Name          : main.c
  * Description        : Main program body
  ******************************************************************************
  ** This notice applies to any and all portions of this file
  * that are not between comment pairs USER CODE BEGIN and
  * USER CODE END. Other portions of this file, whether 
  * inserted by the user or by software development tools
  * are owned by their respective copyright owners.
  *
  * COPYRIGHT(c) 2018 STMicroelectronics
  *
  * 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 "main.h"
#include "stm32f3xx_hal.h"
#include "adc.h"
#include "dma.h"
#include "i2c.h"
#include "spi.h"
#include "tim.h"
#include "usart.h"
#include "gpio.h"
 
/* USER CODE BEGIN Includes */
 
/* USER CODE END Includes */
 
/* Private variables ---------------------------------------------------------*/
 
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
 
/* USER CODE END PV */
 
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
 
/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
 
/* USER CODE END PFP */
 
/* USER CODE BEGIN 0 */
uint32_t adc1Wert[3];
uint32_t adc2Wert[3];
uint32_t adcbuffer[6];
 
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
		for(int i=0; i<6; i++)
		adc1Wert[i]=adcbuffer[i];
 
		for(int i=3; i<6; i++)
		adc2Wert[i-3]=adcbuffer[i];
}
 
/* USER CODE END 0 */
 
int main(void)
{
 
  /* USER CODE BEGIN 1 */
	uint32_t wert[6];
	
  /* USER CODE END 1 */
 
  /* MCU Configuration----------------------------------------------------------*/
 
  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();
 
  /* USER CODE BEGIN Init */
 
  /* USER CODE END Init */
 
  /* Configure the system clock */
  SystemClock_Config();
 
  /* USER CODE BEGIN SysInit */
 
  /* USER CODE END SysInit */
 
  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_ADC1_Init();
  MX_ADC2_Init();
  MX_I2C1_Init();
  MX_SPI2_Init();
  MX_UART4_Init();
  MX_TIM3_Init();
  MX_TIM2_Init();
 
  /* USER CODE BEGIN 2 */
  HAL_TIM_Base_Start(&htim3);
 
  HAL_ADC_Start(&hadc2);
  HAL_ADCEx_MultiModeStart_DMA(&hadc1, (uint32_t*)adcbuffer, 6);
 
  /* USER CODE END 2 */
 
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
    while (1)
    {
  /* USER CODE END WHILE */
 
  /* USER CODE BEGIN 3 */
 
     for(int i=0; i<6;i++)
     {
    	 wert[i]= adcbuffer[i];
     }
  
    }
  /* USER CODE END 3 */
 
}
 
/** System Clock Configuration
*/
void SystemClock_Config(void)
{
 
  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_PeriphCLKInitTypeDef PeriphClkInit;
 
    /**Initializes the CPU, AHB and APB busses clocks 
    */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = 16;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL2;
  RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }
 
    /**Initializes the CPU, AHB and APB busses clocks 
    */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
 
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }
 
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_UART4|RCC_PERIPHCLK_I2C1
                              |RCC_PERIPHCLK_ADC12|RCC_PERIPHCLK_TIM2
                              |RCC_PERIPHCLK_TIM34;
  PeriphClkInit.Uart4ClockSelection = RCC_UART4CLKSOURCE_PCLK1;
  PeriphClkInit.Adc12ClockSelection = RCC_ADC12PLLCLK_DIV1;
  PeriphClkInit.I2c1ClockSelection = RCC_I2C1CLKSOURCE_HSI;
  PeriphClkInit.Tim2ClockSelection = RCC_TIM2CLK_HCLK;
  PeriphClkInit.Tim34ClockSelection = RCC_TIM34CLK_HCLK;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }
 
    /**Configure the Systick interrupt time 
    */
  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
 
    /**Configure the Systick 
    */
  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
 
  /* SysTick_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
 
/* USER CODE BEGIN 4 */
 
/* USER CODE END 4 */
 
/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
void _Error_Handler(char * file, int line)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  while(1) 
  {
  }
  /* USER CODE END Error_Handler_Debug */ 
}
 
#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 CODE BEGIN 6 */
  /* 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) */
  /* USER CODE END 6 */
 
}
 
#endif
 
/**
  * @}
  */ 
 
/**
  * @}
*/ 
 
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

Simon G. · ‎2018-08-23