topic Re: Can the channelB to N of ADC in S32K144 triggered by software? in S32K

Can the channelB to N of ADC in S32K144 triggered by software?

timwang — Fri, 26 Jan 2018 13:10:53 GMT

I can't change the channel ID of the ADC using swtrigger to complete the conversion.

The number of the channel can only be 0,i can't get the result of conversion if i change it.

In the RM,i find this sentence: None of the SC1B-SC1n registers are used for
software trigger operation and therefore writes to the SC1BSC1n registers do not initiate
a new conversion.

So,should i have to enable the pdb to use multiple channels for AD conversion at the same time？

Hope to get a reply as soon as possible.

Re: Can the channelB to N of ADC in S32K144 triggered by software?

danielmartynek — Fri, 02 Feb 2018 14:24:49 GMT

Hi,
I’m sorry for the late response.
Yes, only SCIA (SC1[chanIndex == 0]) can be used for software trigger.
And you can trigger only a single channel with a write to SCIA.
If you want to trigger more channels in a back-to-back conversion, use PDB.

You may refer to: https://community.nxp.com/docs/DOC-339644

Regards,
Daniel

Re: Can the channelB to N of ADC in S32K144 triggered by software?

danielmartynek — Sun, 04 Feb 2018 22:51:03 GMT

Hi,

You could also use SDK Peripheral Abstraction Layer (ADC PAL).

Which allows you to trigger a group of ADC conversions with a single SW or HW trigger.

SDK v0.8.5 includes adc_pal_example_s32k144

Regards,

Daniel