Setting up ADC1 on STM32U585QII

[MApli.1]

Hello,

I'm using StmCubeMX 6.5.0 with StmCubeIDE 1,9.0.

I'm trying to set up ADC1 channel 7 (PA2 pin) in polling mode on STM32U585QII device.

HAL_ADC_GetValue is always returning 0 while it should return something else.

Below is a simple main function:

int main(void)
{
 /* USER CODE BEGIN 1 */
	uint32_t adc_value;
 /* 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();
 
 /* Configure the System Power */
 SystemPower_Config();
 
 /* USER CODE BEGIN SysInit */
 
 /* USER CODE END SysInit */
 
 /* Initialize all configured peripherals */
 MX_GPIO_Init();
 MX_ADC1_Init();
 /* USER CODE BEGIN 2 */
 
 /* USER CODE END 2 */
 
 /* Infinite loop */
 /* USER CODE BEGIN WHILE */
 while (1)
 {
 /* USER CODE END WHILE */
 
 /* USER CODE BEGIN 3 */
		if(HAL_ADC_Start(&hadc1) == HAL_OK)
		{
			HAL_ADC_PollForConversion(&hadc1, 100);
			adc_value = HAL_ADC_GetValue(&hadc1);
		}
 
		HAL_Delay (200);
 }
 /* USER CODE END 3 */
}

Here is also system clock configuration:

void SystemClock_Config(void)
{
 RCC_OscInitTypeDef RCC_OscInitStruct = {0};
 RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
 
 /** Supply configuration update enable
 */
 HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
 /** Configure the main internal regulator output voltage
 */
 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0);
 
 while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
 /** Macro to configure the PLL clock source
 */
 __HAL_RCC_PLL_PLLSOURCE_CONFIG(RCC_PLLSOURCE_HSE);
 /** Initializes the RCC Oscillators according to the specified parameters
 * in the RCC_OscInitTypeDef structure.
 */
 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
 RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
 RCC_OscInitStruct.PLL.PLLM = 1;
 RCC_OscInitStruct.PLL.PLLN = 62;
 RCC_OscInitStruct.PLL.PLLP = 1;
 RCC_OscInitStruct.PLL.PLLQ = 2;
 RCC_OscInitStruct.PLL.PLLR = 2;
 RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_3;
 RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
 RCC_OscInitStruct.PLL.PLLFRACN = 4096;
 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
 {
 Error_Handler();
 }
 /** Initializes the CPU, AHB and APB buses clocks
 */
 RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
 |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
 |RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1;
 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
 RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
 RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;
 RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
 RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
 RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
 RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
 
 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)
 {
 Error_Handler();
 }
}

I also tried capturing with interrupt (HAL_ADC_Start_IT) but is also returning value 0.

There is voltage on VDDA pin.

What I'm doing wrong or what clould be causing this problem?

Best regards,

Miha

[victagayun]

In the repository, you will find an example for the ADC.

\Repository\STM32Cube_FW_U5_V1.1.0\Projects\NUCLEO-U575ZI-Q\Examples\ADC\ADC_SingleConversion_TriggerSW_IT\Src

 /* Perform ADC calibration */
 if (HAL_ADCEx_Calibration_Start(&hadc1, ADC_CALIB_OFFSET, ADC_SINGLE_ENDED) != HAL_OK)
 {
 /* Calibration Error */
 Error_Handler();
 }
 
 /* USER CODE END 2 */
 
 /* Infinite loop */
 /* USER CODE BEGIN WHILE */
 while (1)
 {
 /* Start ADC group regular conversion */
 if (HAL_ADC_Start_IT(&hadc1) != HAL_OK)
 {
 /* Error: ADC conversion start could not be performed */
 Error_Handler();
 }

[MApli.1]

@victagayun​ I have added calibration as mentioned in example and it did not help. Now it stucks in function: HAL_ADCEx_Calibration_Start -> LL_ADC_IsCalibrationOnGoing. Calibration does not end.

I have also enabled ICACHE and it also did not help.

[victagayun]

Can you check versus this?

 ADC_ChannelConfTypeDef sConfig;
 
 HAL_Init();
 
 /* Configure the system clock to 400 MHz */
 SystemClock_Config();
 
 /*##-1- Configure the ADC peripheral #######################################*/
 AdcHandle.Instance = ADCx;
 
 if (HAL_ADC_DeInit(&AdcHandle) != HAL_OK)
 {
 /* ADC de-initialization Error */
 Error_Handler();
 }
 
 
 
 AdcHandle.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV2; /* Asynchronous clock mode, input ADC clock divided by 2*/
 AdcHandle.Init.Resolution = ADC_RESOLUTION_16B; /* 16-bit resolution for converted data */
 AdcHandle.Init.ScanConvMode = DISABLE; /* Sequencer disabled (ADC conversion on only 1 channel: channel set on rank 1) */
 AdcHandle.Init.EOCSelection = ADC_EOC_SINGLE_CONV; /* EOC flag picked-up to indicate conversion end */
 AdcHandle.Init.LowPowerAutoWait = DISABLE; /* Auto-delayed conversion feature disabled */
 AdcHandle.Init.ContinuousConvMode = DISABLE; /* Continuous mode disabled to have only 1 conversion at each conversion trig */
 AdcHandle.Init.NbrOfConversion = 1; /* Parameter discarded because sequencer is disabled */
 AdcHandle.Init.DiscontinuousConvMode = DISABLE; /* Parameter discarded because sequencer is disabled */
 AdcHandle.Init.NbrOfDiscConversion = 1; /* Parameter discarded because sequencer is disabled */
 AdcHandle.Init.ExternalTrigConv = ADC_SOFTWARE_START; /* Software start to trig the 1st conversion manually, without external event */
 AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; /* Parameter discarded because software trigger chosen */
 AdcHandle.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DR; /* Regular Conversion data stored in DR register only */
 AdcHandle.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN; /* DR register is overwritten with the last conversion result in case of overrun */
 AdcHandle.Init.OversamplingMode = DISABLE; /* No oversampling */
 
 if (HAL_ADC_Init(&AdcHandle) != HAL_OK)
 {
 /* ADC initialization Error */
 Error_Handler();
 }
 
 /*##-2- Configure ADC regular channel ######################################*/
 sConfig.Channel = ADCx_CHANNEL; /* Sampled channel number */
 sConfig.Rank = ADC_REGULAR_RANK_1; /* Rank of sampled channel number ADCx_CHANNEL */
 sConfig.SamplingTime = ADC_SAMPLETIME_8CYCLES_5; /* Sampling time (number of clock cycles unit) */
 sConfig.SingleDiff = ADC_SINGLE_ENDED; /* Single-ended input channel */
 sConfig.OffsetNumber = ADC_OFFSET_NONE; /* No offset subtraction */ 
 sConfig.Offset = 0; /* Parameter discarded because offset correction is disabled */
 
 
 if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK)
 {
 /* Channel Configuration Error */
 Error_Handler();
 }
 
 /* Run the ADC calibration in single-ended mode */
 if (HAL_ADCEx_Calibration_Start(&AdcHandle, ADC_CALIB_OFFSET, ADC_SINGLE_ENDED) != HAL_OK)
 {
 /* Calibration Error */
 Error_Handler();
 }
 
 /*##-3- Start the conversion process #######################################*/
 if (HAL_ADC_Start(&AdcHandle) != HAL_OK)
 {
 /* Start Conversation Error */
 Error_Handler();
 }
 
 /*##-4- Wait for the end of conversion #####################################*/
 /* For simplicity reasons, this example is just waiting till the end of the
 conversion, but application may perform other tasks while conversion
 operation is ongoing. */
 if (HAL_ADC_PollForConversion(&AdcHandle, 10) != HAL_OK)
 {
 /* End Of Conversion flag not set on time */
 Error_Handler();
 }
 else
 {
 /* ADC conversion completed */
 /*##-5- Get the converted value of regular channel ########################*/
 uhADCxConvertedValue = HAL_ADC_GetValue(&AdcHandle);
 }

Found it on "Repository\STM32Cube_FW_H7_V1.10.0\Projects\NUCLEO-H743ZI\Examples\ADC\ADC_RegularConversion_Polling"

[MApli.1]

I have compared with my code, it is pretty much what I currently have, but unfortunately it does not work.

I'm playing with clock settings, but still cannot get it to work.

[victagayun]

Unfortunately, I do not have that MCU.

Can you screen capture your CubeMX settings?

ALso, try on other pins as well.

[victagayun]

Try to load the example.

https://github.com/STMicroelectronics/STM32CubeU5/tree/main/Projects/NUCLEO-U575ZI-Q/Examples/ADC/ADC_SingleConversion_TriggerSW_IT

[MApli.1]

I pretty much copied the settings of ADC and set clock to same values and used an internal oscilator.

I have noticed that function ADC_Enable returns an error (HAL_ERROR) - timeout occours.

But if I again call HAL_ADC_Start_IT it returns HAL_OK. I'm not sure what is happening here. Also interrupts are comming and HAL_ADC_GetValue is still returning value 0.

[MApli.1]

Below code needs to be added after inicialization of adc in order for adc to work:

 __HAL_RCC_PWR_CLK_ENABLE();
 HAL_PWREx_EnableVddA();

[victagayun]

Hey, you mean CubeMX did not generate it in HAL MSP?

https://github.com/STMicroelectronics/STM32CubeU5/blob/main/Projects/NUCLEO-U575ZI-Q/Examples/ADC/ADC_SingleConversion_TriggerSW_IT/Src/stm32u5xx_hal_msp.c

[MApli.1]

HAL_PWREx_EnableVddA();

was not added by CubeMX. I added it maunally.

__HAL_RCC_PWR_CLK_ENABLE();

was added in HAL MSP by CubeMX.

[victagayun]

@Khouloud OTHMAN we know that in the repository example, there is an additional code in /* USER CODE BEGIN MspInit 1 */ as shown below.

 HAL_PWREx_EnableVddA();
 HAL_PWREx_EnableVddIO2();

Should this be automatically added by CubeMX or should it be left to the user to add?

I am referring to this repository https://github.com/STMicroelectronics/STM32CubeU5/blob/main/Projects/NUCLEO-U575ZI-Q/Examples/ADC/ADC_SingleConversion_TriggerSW_IT/Src/stm32u5xx_hal_msp.c