topic Using HW_average,HW_Comparison and getting channel result with help of ADC PAL in S32K

Using HW_average,HW_Comparison and getting channel result with help of ADC PAL

shubhendu_shukl — Thu, 23 Jan 2020 09:37:40 GMT

Hi,

We are using multiple ADC inputs in our customized board, Now to read the values from All these pins we are planning to use ADC Pal, But for higher accuracy we need to integrate HW_Average and HW_Comparison

how can we use the same with ADC Pal example

Re: Using HW_average,HW_Comparison and getting channel result with help of ADC PAL

PetrS — Mon, 27 Jan 2020 06:07:32 GMT

Hi,

the ADC PAL driver does not provide setting for HW average/compare functions. The ADC driver offers both the average and compare functionality.

BR, Petr

Re: Using HW_average,HW_Comparison and getting channel result with help of ADC PAL

shubhendu_shukl — Mon, 27 Jan 2020 06:30:52 GMT

Hi Petr,

Thanks for the reply

As per use case we want to use grouping feature as well as HW average/compare, what will be the best suited approach.

Re: Using HW_average,HW_Comparison and getting channel result with help of ADC PAL

PetrS — Wed, 29 Jan 2020 08:43:38 GMT

Hi,

To do a conversion of multiple channels it is ideally to use HW triggering through a PDB module, while back to back mechanism can be done too.
You can refer to example posted on comunity; https://community.nxp.com/docs/DOC-343295

If HW average/compare is enabled, it is active for all the channels measured, which extends a conversion time, so trigger time generation must be properly configured.

BR, Petr