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