RTOS/TDA2EVM5777: MMC/SD write speed problem

Dawei Zhang

Intellectual 330 points

Part Number: TDA2EVM5777

Tool/software: TI-RTOS

Hi,

I's using the RTOS app to dump video data to SD card for analyzing. But i found the

SD write speed is a little slow. I tried SDHC card & SDXC card. Both have low write performance.

And I test the card write speed on PC. The speed is about 30MB/s.

Then how can I improve the SD write speed on my TDA?

over 7 years ago

0 Rishabh Garg over 7 years ago

TI__Guru 55685 points

Hi,

What is the write speed that you are observing with TDA?

Regards,
Rishabh

0 Dawei Zhang over 7 years ago in reply to Rishabh Garg

Intellectual 330 points

Rishabh,

It's about 5MB/s on my TDA2x board. Does that make sense? Thanks.

Regards,
Zhang

0 Rishabh Garg over 7 years ago in reply to Dawei Zhang

TI__Guru 55685 points

Hi,

Unfortunately fatlib (FAT library) that you are using is not optimized for performance as it is a reference code.
I think the speed you are getting is quite optimal for this code.

Regards,
Rishabh

0 Dawei Zhang over 7 years ago in reply to Rishabh Garg

Intellectual 330 points

Rishabh,

Got it. Thanks for your replay.

Regards,
Zhang

0 Dawei Zhang over 7 years ago in reply to Rishabh Garg

Intellectual 330 points

Rishabh,

Is there any other FS the tda2x support? Like exfat or ntfs.

0 Rishabh Garg over 7 years ago in reply to Dawei Zhang

TI__Guru 55685 points

Hi Dawei,

There is no SW support for exfat and ntfs file systems in Vision SDK.

Regards,
Rishabh

0 Dawei Zhang over 7 years ago in reply to Rishabh Garg

Intellectual 330 points

Rishabh,

Thanks for you support.

Regards,
Zhang

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RTOS/TDA2EVM5777: MMC/SD write speed problem