Hello,
I´m working on a Project with a STM32F373CCT. I need to compensate the signal read from the SDADC Signal with the internal ADC Temprature sensor.
The Problem is that I only get the Value 0xFFF from the internal Temprature Sensor and also the Reference Voltage Channel.
I already checked the ADC configuration Bit ADC_CR2_TSVREFE. It is set and it is set before the ADC is turned on.
I also checked the VDDA and VSSA Pins with a DVM. They are connected to the GND, 3.3V VCC accordingly.
Also the ADC is running at 10MHz and a sampling Time of 239.5 cycles should be far greater than the needed 17.1µs sampling Time for the Internal Temperature sensor.
Some more Information to the Project:
I am using the SDADC with the internal 1,8V reference, but this reference should be seperated from the normal ADC Voltage.
I am using the current STMCubeIDE 1.5.0 with STM32Cube MCU Package for STM32F3 in Version 1.11.2
My simple Testcode:
int main(void)
{
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART3_UART_Init();
MX_ADC1_Init();
/* Infinite loop */
while (1)
{
HAL_Delay(100);
HAL_ADC_Start(&hadc1);
HAL_Delay(100);
HAL_ADC_PollForConversion(&hadc1, 1000);
HAL_Delay(100);
uint32_t temp = HAL_ADC_GetValue(&hadc1);
}
}
the corresponding ADC.c:
/**
******************************************************************************
* File Name : ADC.c
* Description : This file provides code for the configuration
* of the ADC instances.
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2020 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "adc.h"
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
ADC_HandleTypeDef hadc1;
/* ADC1 init function */
void MX_ADC1_Init(void)
{
ADC_ChannelConfTypeDef sConfig = {0};
/** Common config
*/
hadc1.Instance = ADC1;
hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = 1;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_TEMPSENSOR;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
}
void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
{
if(adcHandle->Instance==ADC1)
{
/* USER CODE BEGIN ADC1_MspInit 0 */
/* USER CODE END ADC1_MspInit 0 */
/* ADC1 clock enable */
__HAL_RCC_ADC1_CLK_ENABLE();
/* USER CODE BEGIN ADC1_MspInit 1 */
/* USER CODE END ADC1_MspInit 1 */
}
}
void HAL_ADC_MspDeInit(ADC_HandleTypeDef* adcHandle)
{
if(adcHandle->Instance==ADC1)
{
/* USER CODE BEGIN ADC1_MspDeInit 0 */
/* USER CODE END ADC1_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_ADC1_CLK_DISABLE();
/* USER CODE BEGIN ADC1_MspDeInit 1 */
/* USER CODE END ADC1_MspDeInit 1 */
}
}
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
As mentioned above, changing the Channel to the internal ADC Ref measurement doesn´t change the measurement result. It always measures 0xFFF.
Can somebody help me, or have some clues, what to check next to use the internal Temprature sensor?
Best Regards
