Processor Expert Software中的主题 ADC Channels

ADC Channels

Gargi2021 — Thu, 03 Mar 2022 08:46:24 GMT

I want to Monitor 12 ADC channels at a time in S32K144. There are two timers/trigger LPIT AND PDB present to configure ADC channels. What I observed is there are 4 LPIT channel and 2 PDB(number of trigger slot 1 and pre-trigger slot -8)slots present.

Can you please support by suggesting solution to my below query :

how many channels I can use at a time( I required 12 ADC to monitor at a time)
How many LPIT and PDB channels I require to configure ADC.

Re: ADC Channels

PetrS — Fri, 04 Mar 2022 11:14:45 GMT

Hi,

PDB module has 2 channels, each channel has 8 pretriggers, so total 16 samples can be converted sequentially upon trigger from PDB on single ADC module. Same for second PDB/ADC modules.
At the same time 2 channels can be converted simultaneously, one on each ADC module.
You can refer to below example showing usage of SDK driver to do multiple channel conversions;
https://community.nxp.com/t5/S32K-Knowledge-Base/Example-S32K144-PDB-ADC-DMA-S32DS-ARM-2018-R1/ta-p/1101686

BR, Petr