GPIO DMA Event

David Luca

Hello,

Are there any functions related to generating DMA events from GPIO input pins? I found in gpio.h only for setting interrupts. The Technical Reference Manual of C6748 section "19.2.11 EDMA Event Support" doesn't say anything just "The GPIO peripheral may provide synchronization events to the DMA controller."

Thank you in advance,

David.

over 13 years ago

0 Sujith KV over 13 years ago

TI__Intellectual 2525 points

Hi David,

StarterWare doesnt have any example for related to generating DMA events from GPIO input pins.

Regards,

Sujith

0 David Luca over 13 years ago in reply to Sujith KV

Expert 2795 points

Hi Sujith,

I cannot use the technical reference manual either, any documentation available regarding this matter then?

Best regards,

David.

0 Joe Coombs over 13 years ago in reply to David Luca

TI__Expert 8890 points

David,

The GPIO interrupts definitely can be used to drive EDMA transfers. The relevant event IDs (ex. EDMA3_CHA_GPIO_BNKINT0) are defined in the edma_event.h header file. For C6748, you should find this file in the include/c674x/c6748 folder. I recommend reviewing one of the existing example applications that uses EDMA, such as examples/evmC6748/uart_edma, to understand how to setup EDMA using the StarterWare APIs.

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GPIO DMA Event