How to enable auto-calibration in ADC blocks?

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How to enable auto-calibration in ADC blocks?

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p_a_u_darshana
Contributor III

How can I enable ADC calibration in Simulink?

V4.2.0 product release report says that it is available in the block. But I cannot find any option in the ADC config block.

p_a_u_darshana_0-1631684033723.png

 

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Merritt08
Contributor I

Hello,

 

1. I observe the same issue with self-calibration of no value being written to ADC1_CAL after calibration completes successfully (CAL bit clears and CALF bit is not set). However some value getting written to ADC1_R0. This happens when VBGH/VBGL is selected as voltage reference, but if VREFH/VREFL with all other settings being the same, the calibration gives results in the ADC1_CAL.  In the first case where VBGH/VBHL is selected and calibration does not have any results, subsequent conversions seem to have significant offset from the true value. Any suggestions?

2. I need ADC performance/accuracy characterization with internal bandgap used as voltage reference. How can I get that data?

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mariuslucianand
NXP Employee
NXP Employee

Hello @p_a_u_darshana ,

The AutoCalibration function is called automatically for all the instances enabled in the S32K Blocks.

mariuslucianand_0-1631692884801.png

Hope this helps,

Marius