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STM32H7 ADC1 can not be enabled

Question asked by handzic.dirk on May 11, 2018
Latest reply on May 11, 2018 by handzic.dirk

Hi,

I am not able to start the ADC using the the HAL:

 

        hadc1.Instance = ADC1;
        hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV4;
        hadc1.Init.Resolution = ADC_RESOLUTION_16B;
        hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
        hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
        hadc1.Init.LowPowerAutoWait = DISABLE;
        hadc1.Init.ContinuousConvMode = ENABLE;
        hadc1.Init.NbrOfConversion = 1;
        hadc1.Init.DiscontinuousConvMode = DISABLE;
        hadc1.Init.NbrOfDiscConversion = 1;
        hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
        hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
        hadc1.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DR;
        hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
        hadc1.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE;
        hadc1.Init.BoostMode = DISABLE;
        hadc1.Init.OversamplingMode = DISABLE;
        if(HAL_ADC_Init(&hadc1) != HAL_OK){
            Error_Handler();
        }  
        sConfig.Channel = ADC_CHANNEL_6;
        sConfig.Rank = ADC_REGULAR_RANK_1;
        sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;
        sConfig.SingleDiff = ADC_SINGLE_ENDED;
        sConfig.OffsetNumber = ADC_OFFSET_NONE;
        sConfig.Offset = 0;
        if(HAL_ADC_ConfigChannel(&hadc1,&sConfig) != HAL_OK){
            Error_Handler();
        }  
        if(HAL_ADC_Start(&hadc1) != HAL_OK){
            Error_Handler();
        } 

 

The ADC_ISR_ARDY bit is not set and the ADC_Enable function will return HAL_ERROR. My first thought has been the clock source which was PLL2P (not working for SPI1) and I changed it to PLL3R but that did not solve the problem this time.

 

Any suggestions?

 

Regards

Dirk

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