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Vybrid DMA Request from GPIO Input

Question asked by Nathan Barrett on Aug 14, 2015
Latest reply on Aug 19, 2015 by Nathan Barrett

Hello All,

 

I'm currently trying to trigger a DMA request from an external GPIO input (PORT2[2]).

 

I can mux the GPIO input, and set the PCR->IRQC to 0xA and I get an interrupt generated no problem.

 

However, when I set the PCR->IRQC to 0x2, I never get a DMA request signal from DMA request source 41.

 

If I change the DMA request source to 24 (a flextimer I currently have running in DMA mode ), the DMA works correctly.

 

 

 

Does anyone know what's going on here?  Can anyone confirm that DMA requests from GPIO inputs correctly function?

 

 

 

Thanks.

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