ADC with multi-channel works and DMA

[hanchengyang]

Hello everyone,

I am working on a project which needs take care of many analog inputs, now I am using the the stupid method : configure to channel X -> wait for interrupt -> change to next channel ...

Is there any example that ADC refreshes certain array frequently without interrupting CPU ??

Best regards,

YANG Hancheng

[hanchengyang]

I forgot to mention that I am using KDS 3.0.1 with PEx.

[DavidS · Accepted solution]

Hi YANG Hancheng,

We don not have specific example for your environment but there is good appnote that goes over using DMA for reading many ADC channel's.

http://cache.freescale.com/files/32bit/doc/app_note/AN4590.pdf

Regards,

David

[hanchengyang]

Thanks a lot, I have just successfully configured DMA in ProcessorExpert for 12 channels continuous sampling with the help of your application note. Maybe I will wrote a guide for others.

Regards,

Hancheng

[DavidS]

Hi Hancheng,

Congratulations on your efforts!

If you have time to document (and/or share) I am sure others would appreciate and learn from it.

Regards,

David