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Handzic.Dirk
Handzic.Dirk
Associate III
May 17, 2018
Question

STM32H743 ADC calibration timeout

  • May 17, 2018
  • 2 replies
  • 1209 views
Posted on May 17, 2018 at 18:07

My ADC clock is 25 MHz and

HAL_ADCEx_Calibration_Start(&hadc1, ADC_CALIB_OFFSET_LINEARITY, ADC_SINGLE_ENDED) will return an error due to ADC_CALIBRATION_TIMEOUT being exceed I changed the value from 64000 to 640000 and now it works fine. It seems to take about 65683 cycles at my system.

Regards

Dirk

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2 replies

DFrei
DFrei
Visitor II
August 27, 2018

Same problem here... did not find any working clocking combination with ADC_CALIB_OFFSET_LINEARITY and standard ADC_CALIBRATION_TIMEOUT value of 64000. Calibration with ADC_CALIB_OFFSET works fine but ADC_CALIB_OFFSET_LINEARITY does not.

Amel NASRI
Amel NASRI
ST Technical Moderator
September 27, 2018

Hi,

Please note that the issue related to the wrong ADC_CALIBRATION_TIMEOUT value is tracked internally as stated in https://community.st.com/s/question/0D50X00009kLCgUSAW/bug-in-haladcexcalibrationstart.

@DFrei​ ,

Could you please share the content of ADC_CR when ADC_CALIB_OFFSET_LINEARITY is used?

-Amel

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