RTOS/PROCESSOR-SDK-AM335X: SD card format issue

Eten Wu

Prodigy 250 points

Part Number: PROCESSOR-SDK-AM335X

Tool/software: TI-RTOS

Hi Experts,

We are developing a product, using AM3352. And I have two problems about handling the FATFS.

1. How to format the SD card ?Below is my current implementation

=============================================================

FATFS_open(0U, NULL, &fatfsHandle);

FRESULT fRetval = f_mkfs("", FM_EXFAT, 0, work, sizeof work);

=============================================================

But the return value is 3 (FR_NOT_READY, /* (3) The physical drive cannot work */ )

2. To re-open the FATFS is failed.

=============================================================

FATFS_open(0U, NULL, &fatfsHandle);

….. file operation …..

FATFS_close(fatfsHandle);

FATFS_open(0U, NULL, &fatfsHandle);

fRetval = f_opendir(&dp, "/xxx");

=============================================================

Then the return value of f_opendir() is not okay.

I suspect that these two issues result from the same root-cause.

I have traced the source code, but I don’t know why the MCSD structure object’s isOpen attribute is -1 when re-open the file system.

Thank you !!

Regards,
Eten

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

The RTOS team have been notified. They will respond here.

0 Lalindra Jayatilleke over 8 years ago

TI__Mastermind 30365 points

Eten,

Could you please check out e2e.ti.com/.../2370585
I'm not sure if there is a way to format the card in SW at this time. We typically use a utility to do so.

Lali

0 Eten Wu over 8 years ago in reply to Lalindra Jayatilleke

Prodigy 250 points

Hi Lali,

So the current formating SD mechanism is to execute the windows format utility, right ?
And I found the following information and need to double check with you about the #2 issue and it is still a known issue.

Page 4. of the StarterWare Release Note.pdf

Known Issues

Known issues have been listed below:

Module/Example		Description
MMCSD/FS Shell	•	Application fails on card re-insert.

Thank you !!

Regards,
Eten

0 Lalindra Jayatilleke over 8 years ago in reply to Eten Wu

TI__Mastermind 30365 points

Eten,

This issue has since been addressed.
I would advise you take a look at the examples in the PDK located at C:\ti\pdk_am335x_1_0_8\packages\MyExampleProjects\MMCSD_FatfsConsole_bbbAM335x_armExampleProject instead of trying to start from scratch with Starterware.

Starterware in the current PDK release is there for legacy reasons. The best way forward to developing your application is to use the examples in the MyExampleProjects directory in the PDK.

Lali

Processors

Processors forum

RTOS/PROCESSOR-SDK-AM335X: SD card format issue

Known Issues