TMS470M - SCI with DMA Code Sample

David Ciampi

Prodigy 240 points

Other Parts Discussed in Thread: HALCOGEN, TMS470MF06607

Do you have sample code that enables the SCI with DMA for both Rx and Tx?

over 12 years ago

0 Brian Fortman over 12 years ago

TI__Expert 7650 points

Hi David,

We have sample code included in HALCoGen that does a DMA enabled SPI transport. However, your post confuses me a bit since it references TMS470M which doesn't support a DMA. Do you mean TMS570?

0 David Ciampi over 12 years ago in reply to Brian Fortman

Prodigy 240 points

I am using the TMS470MF06607.

I am looking at spnu495b.pdf in section 18.5 (SCI DMA Interface).

This section makes references to a DMA interface.

Please advise.

0 Chuck Davenport over 12 years ago in reply to David Ciampi

TI__Guru 59540 points

Hello David,

In the TRM you mention, the SCI IP described is the superset IP which is designed to accomodate a DMA however, the DMA IP is not included in the TMS470M device family as can be seen in the device datasheet and is also why the TRM does not have a DMA chapter.

0 David Ciampi over 12 years ago in reply to Chuck Davenport

Prodigy 240 points

Thank you for the response. That would explain why I couldn't find any info on how to configure the DMA (it doesn't exist).

This is the first core I have used which did not have a DMA engine.

I don't see any internal buffers on the Receive Data Register. Is interrupts the only effective way to use the SCI peripheral on the TMS470M?

0 Zhaohong Zhang over 12 years ago in reply to David Ciampi

TI__Mastermind 22715 points

David,

Using interrupt is the most effective method to drive SCI onTMS470M.

Thanks and regards,

Zhaohong

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TMS470M - SCI with DMA Code Sample