S32KのトピックRe: ADC readings Self test

ADC readings Self test

Ayaz — Wed, 15 Jan 2025 08:51:08 GMT

Hi,

I have some questions regarding the ADC self-test while using BCTU triggering via EMIOS, which is a hardware trigger. Here are my queries:

ADC Self-Test : how do we do the ADC self test when we are doing BCTU triggering?
Self-Test Triggering: My understanding is that the BCTU itself triggers the self-test. If this is correct, how do we read the results?
Self-Test Result Verification: How can we determine if the self-test has passed or failed?
Timing of Self-Test When does the self-test occur during BCTU triggering? Is it at the end of each BCTU list for each trigger, at the end of each signal sample, or at some other point?
I hope to receive answers to all my questions

Re: ADC readings Self test

PetrS — Thu, 16 Jan 2025 09:33:58 GMT

Hi,

running the ADC self test using the BCTU to trigger it is not supported on K3xx devices.

PetrS_0-1737019786492.png

The RM's chapter 60.3.17.2 Self-test gives info about steps required in CPU mode.

If using RTD, in the ADC driver we provided API calls Adc_SelfTest(), Adc_Sar_Ip_SelfTest(). As per ADC User manual should be called at any time after driver was initialized and there are no ongoing conversions.

BR, Petr

Re: ADC readings Self test

Samuel_DCosta — Thu, 16 Jan 2025 12:24:00 GMT

Hi Petr,

Could you help us understand how we can ensure that there is no ongoing conversion when triggers are generated via hardware?

Re: ADC readings Self test

PetrS — Fri, 17 Jan 2025 12:02:06 GMT

Hi,

module MSR register gives status for ongoing conversions. If module is in BCTU control mode you will need to disable it.

BR, Petr