BINTEN -- EDMA event

Flamingo

Other Parts Discussed in Thread: OMAP-L137

(OMAP-L137)/ DSP side

The GPIO documentation says "Note that the bits in BINTEN control both the interrupt and EDMA events." The field values are 0 = interrupts are disabled and 1 = interrupts are enabled. If I want an EDMA event without an interrupt, do I set BINTEN to 1 and then disable the interrupt?

over 16 years ago

0 Mariana over 16 years ago

TI__Mastermind 24340 points

Yes. From the GPIO perspective, the BINTEN register enables interrupt events and EDMA events together and it can not be separated. The interrupt controller or EDMA can mask out the event if not needed.

0 Flamingo over 16 years ago in reply to Mariana

Expert 2290 points

Hmm. I was hoping it was the other way. I want the EDMA event, but not the interrupt. That is, I'd prefer to have the DMA process the (SPI) event without the overhead of an interrupt routine.

Can I enable the event with BINTEN and disable the interrupt?

I have up to 250000 16-bit words to transfer. I'm trying to set up the SPI in 4-pin with CS mode. I'm talking to a chip that will drive SPI_ENA to signal the next event.

0 Mariana over 16 years ago in reply to Flamingo

TI__Mastermind 24340 points

Flamingo said:
Can I enable the event with BINTEN and disable the interrupt?

Yes. Or you simply not enable the interrupt.

Please see:

http://tiexpressdsp.com/index.php/Configuring_GPIO_EDMA_Events

http://tiexpressdsp.com/index.php/Configuring_GPIO_Interrupts

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BINTEN -- EDMA event