INT_UDMA vs INT_UDMAERR

Sarang Mandke

What is the difference between the 2 interrupts for UDMA? INT_UDMAERR vs INT_UDMA

I am trying to setup a SPI transfer via DMA. Which interrupt should I use to signal completion of DMA operation?

0 Markel Robregado over 11 years ago

Guru 86745 points

Hi Sarang,

You, can see how it is used at the udma_demo example program.

-kel

0 Amit Ashara over 11 years ago in reply to Markel Robregado

Hello Sarang,

The INT_UDMA is the interrupt when the DMA Channel has completed the data transfer without any error

The INT_UDMAERR is the interrupt when the DMA channel has an error during a transfer like the Destination or Source address is not accessible.

You should use both interrupts with the code mainly relying on INT_UDMA for completion and INT_UDMAERR as a mechanism to know that an error occurred.

Regards

Amit

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