S32KのトピックRe: ADC Software trigger in S32k146

ADC Software trigger in S32k146

Shruthi_C — Mon, 26 Jun 2023 06:41:21 GMT

HI,

I have to configure ADC0 to 5 channels and ADC1 to 2 channels

* ADC0-SE2

* ADC0-SE3

* ADC0-SE6

* ADC0-SE7

* ADC0-SE10

* ADC1-SE14

* ADC1-SE15

How can I trigger all these channels by using software triggering method and read the result

pleases support

Thank You

Re: ADC Software trigger in S32k146

Robin_Shen — Mon, 26 Jun 2023 07:47:50 GMT

Hi Shruthi_C,

Please refer to :
Example S32K144 PDB ADC DMA S32DS.ARM.2018.R1
Example S32K148 PDB0-PDB1 ring S32DS3.4 RTM4.0.3
Example S32K148 PDB0-PDB1 ring DMA S32DS3.4 RTM4.0.3

These examples select LPIT hardware trigger, you can use the SW trigger instead.

Best Regards,
Robin
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Re: ADC Software trigger in S32k146

Shruthi_C — Mon, 26 Jun 2023 08:40:51 GMT

HI Robin,

Can we use Software trigger for multiple channels of ADC and a\can we read the results ?

As in data sheet given like this

Re: ADC Software trigger in S32k146

Robin_Shen — Mon, 26 Jun 2023 08:21:02 GMT

Sorry for the misunderstanding with my previous reply.

If you have to configure ADC in software trigger mode (when SC2[ADTRG]=0), then you may need to write SC1A[ADCH] values one by one for ADC0 and ADC1 respectively to achieve ADC sample.

But I think you can configure ADC in hardware trigger mode (when SC2[ADTRG]=1), and select PDB trigger ADC. Select software trigger for PDB, writing 1 to PDB_SC[SWTRIG] resets and restarts the counter of PDB.

For more detail please have a look at 43.7 ADC Trigger Sources of S32K-RM.

Re: ADC Software trigger in S32k146

Shruthi_C — Tue, 27 Jun 2023 10:34:04 GMT

Hi Robin, Thanks for your support