topic s32k312 ADC in S32K

s32k312 ADC

fengba_360 — Wed, 11 Sep 2024 03:28:22 GMT

Hello, I'm working with the ADC sampling function of the s32k312 and I'm trying to understand how the values are stored in the adc1_result[] array when I call the function Adc_Sar_Ip_GetConvDataToArray(ADCHWUNIT_1_INSTANCE, ADC_SAR_IP_CONV_CHAIN_NORMAL, ADC1_CHANNEL_NUM, adc1_result); to retrieve the ADC sampling results.

Specifically, I want to know if the values in the adc1_result[] array are stored based on the configured channel numbers of ADC1, for example:

adc1_result[0] stores the conversion result of p0_chanNum0
adc1_result[1] stores the conversion result of p1_chanNum1
And so on, in a sequential manner.
Or, are they stored based on the actual ADC channel numbers and their corresponding positions in the ADC configuration, like:

adc1_result[0] stores the conversion result of adcchannel0 which might correspond to S19_ChanNum43
adc1_result[1] stores the conversion result of adcchannel1 which might correspond to S20_ChanNum44
And so forth.
I'm looking for clarification on how the results are mapped to the adc1_result[] array

Re: s32k312 ADC

Robin_Shen — Fri, 13 Sep 2024 02:46:16 GMT

Sorry, there is very little information about Adc_Sar_Ip_GetConvDataToArray, so I did a test: I adjusted the order of Adc Physical Channel Name in Channel configurations arry, but the order of ADC result did not change.

So I think your test result should be:
adc1_result[0] stores the conversion result of p0_chanNum0
adc1_result[1] stores the conversion result of p1_chanNum1

It is recommended that you verify this in a non-debugging situation as well.

Best Regards,
Robin
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Re: s32k312 ADC

fengba_360 — Fri, 13 Sep 2024 08:41:42 GMT

My test results are the same as yours. thanks