TMS320VC5509A: MMC DMA Transfers

Matt McConnell

Part Number: TMS320VC5509A

Is there an example showing DMA transmit to a MMC card. I have the manual, i.e. write/wait, MMCWriteBlock functioning. However, all attempts to enable the DMA to handle the transfer are unsuccessful. Examples greatly appreciated. Forum suggest CSL_MMCSD_dmaExample, but example is not in the downloaded file.

over 7 years ago

0 Cvetolin Shulev-XID over 7 years ago

TI__Guru 65405 points

Hi Matt,

I've forwarded this to the software experts. Their feedback should be posted here.

BR
Tsvetolin Shulev

0 Lalindra Jayatilleke over 7 years ago

TI__Mastermind 30365 points

Matt,
"Forum suggest CSL_MMCSD_dmaExample, but example is not in the downloaded file"

The example is located inside the C55x CSL which you can download at software-dl.ti.com/.../index_FDS.html

C:\ti\c55_lp\c55_csl_3.07\ccs_v6.x_examples\mmc_sd\CSL_MMCSD_dmaExample

Lali

0 Matt McConnell over 7 years ago

Prodigy 150 points

I had to drop the DMA approach due to time. I am having difficulty verifying the command response. They do not appear to be correct. Data sheet for the TMS320VC5509A indicates MMCCIDX address as 0x4C1A, functions indicate 0x4C19. Neither appear to have correct responses, yet MMC memory is behaving correctly to commands. Is there additional information, or errata, on the MMC module?

0 Lalindra Jayatilleke over 7 years ago in reply to Matt McConnell

TI__Mastermind 30365 points

Matt,

The only documents available are what's on the project page www.ti.com/.../technicaldocuments
Which functions specifically are referring to 0x4C19?
Also, any particular reason you are developing on the C5509A? Any chance you could use some of the newer C55x devices such as the C5535, 45 or 17?

Thanks.

Lali

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TMS320VC5509A: MMC DMA Transfers