Asynchronous / Synchronous PWM

Discussion around product based on ARM Cortex M3 core.
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chrigus
Posts: 9
Joined: Mon Jul 27, 2009 2:56 pm

Asynchronous / Synchronous PWM

Mon May 23, 2016 5:20 pm

Hi experts,

I'm dealing with a problem with my sam3a:
I need to independend PWM Channels.

Channel 0 is configured as sychronous channel and the period update is made over PDC.
Channel 1 should work independent and the periods are set manually over PWM_CPRDUPD.

Actually both channels are working perfect as long as I just initialise one of them.

The problem now is, that as soon as I set the UPDM = 2 (Automatic update over PDC for Channel 0), Channel 1 stops working.
Why this?
Is it not possible to use one channel updated over PDC and another running manually?

Thank you for your help
Chris
chrigus
Posts: 9
Joined: Mon Jul 27, 2009 2:56 pm

Re: Asynchronous / Synchronous PWM

Mon May 30, 2016 9:14 am

Nobody any experience about this topic?

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