topic Re: Interleaved ADC+DMA, KE14F in Kinetis Microcontrollers

Interleaved ADC+DMA, KE14F

StanleyH — Mon, 29 Jul 2019 11:18:27 GMT

Hi Support team,

Our customer hopes to use two channels of ADC with DMA, and the two ADC+DMA interleave. The ADC is triggered

by a PWM which is used to energize a coil. Please refer the illustration below.

Because can't find a similar use case in our application notes or example code, need your support to suggest a solution and nice to have a workable sample code. Thanks a lot.

Re: Interleaved ADC+DMA, KE14F

nxf47720 — Tue, 30 Jul 2019 01:14:32 GMT

Hi StanleyH,

I think the method to solve this question as below,

The LPIT is configured as periodic counter which will output pre-trigger and trigger signal to TRGMUX periodically.
the ADC is triggered by TRGMUX .
configure DMA channel to get the ADC conversion result .

I will provide relevant reference demo as soon as possible.

Best regards

Adision Zhang