S32KのトピックRe: S32K312 ADC continuous conversion Problems

S32K312 ADC continuous conversion Problems

rexoplans — Sat, 12 Aug 2023 14:18:51 GMT

Hello everyone, I'm using S32K312 microcontroller and I want continuos conversion mode ADC for multi channel but I didnt activate CC(Continous conversion) mode. How can I activate CC mode ? Or, have S32K312 CC mode ?( I wasnt sure because Ref manual say to MC have these mode but I didnt see enable button(for s32ds ) or enable value on struct to firmware.

#adc #s32k312

Re: S32K312 ADC continuous conversion Problems

ramprakash08 — Sun, 13 Aug 2023 16:42:47 GMT

Yes, the S32K312 microcontroller does support continuous conversion mode for ADC. You can enable it by setting the ADC_CFG1[ADLPC] bit to 1. This will enable the low power configuration and continuous conversions.

Here is a code snippet that shows how you can enable continuous conversion mode:

 ADC0->CFG1 |= ADC_CFG1_ADLPC_MASK; // Enable low power configuration ADC0->SC3 |= ADC_SC3_ADCO_MASK; // Enable continuous conversion

Also, if you want to use multiple channels in continuous conversion mode, you need to use the ADC's hardware trigger feature. You can set up a periodic timer interrupt to trigger the ADC conversion for different channels.

Here is a code snippet that shows how you can set up a hardware trigger:

 ADC0->SC2 |= ADC_SC2_ADTRG_MASK; // Enable hardware trigger

Then, in your timer interrupt handler, you can select the ADC channel to be converted:

 ADC0->SC1[0] = ADC_SC1_ADCH(channel); // Select ADC channel

Remember to replace 'channel' with the actual channel number you want to convert.

Re: S32K312 ADC continuous conversion Problems

rexoplans — Sun, 13 Aug 2023 18:30:43 GMT

Thanks for your response. I have one more question. How can I set up a periodic trigger. I tried to do it with PIT but failed. Also, when I want to use multichannel, do I set each channel separately?

Re: S32K312 ADC continuous conversion Problems

Senlent — Mon, 14 Aug 2023 02:41:37 GMT

Hi@rexoplans

there is a demo you can refer to:

https://community.nxp.com/t5/S32K-Knowledge-Base/Example-S32K344-PIT-BTCU-ADC-DMA-DS3-4-RTD100/ta-p/1435324

Re: S32K312 ADC continuous conversion Problems

rexoplans — Mon, 14 Aug 2023 07:15:51 GMT

I tried a system like example but The system didnt work.

Re: S32K312 ADC continuous conversion Problems

rexoplans — Mon, 14 Aug 2023 07:30:13 GMT

The example you gave is valid for the s32k1 series. Unfortunately, the register addresses you specified are not available in s32k3.

Re: S32K312 ADC continuous conversion Problems

Senlent — Mon, 14 Aug 2023 07:36:36 GMT

Hi@rexoplans

Please ignore ramprakash08's answer, this should be an AI.
This routine is based on S32K344, there should be no problem，If there is a problem, please describe your problem in detail

Re: S32K312 ADC continuous conversion Problems

rexoplans — Tue, 15 Aug 2023 12:59:40 GMT

Acctually, PIT havent document on s32ds. It shows the general documents of GPT, but there is no information about the functions of PIT in the documents.

Re: S32K312 ADC continuous conversion Problems

Senlent — Wed, 16 Aug 2023 01:54:30 GMT

Hi@rexoplans

S32K3XXRM-rev7->Chapter 69 Periodic Interrupt Timer

Re: S32K312 ADC continuous conversion Problems

rexoplans — Mon, 21 Aug 2023 08:32:41 GMT

Thanks for response