CSL_MMCSD_SdCardExample the Writing takes place fine but during the reading phase the code hangs .

AV54983

Hi All,

I have been working on SD Card reading and writing.

My configuration: CCS ver 4.0; C5515 USB ezDSP stick.

I am able to Build and Run the CSL_MMCSD_dmaExample. It works fine. It means using DMA, I am able to write and read from SD Card.

Then when I execute the CSL_MMCSD_SdCardExample the Writing takes place fine but the code hangs during the reading phase.

Could someone point out why this could be so ? I am just running the code as it is. Using the linker command file that came with this example VC5505_MMCSD.cmd.

Also I have Built and included the atafs_bios_drv_lib.lib into this project.

The output at the console is:

CSL MMCSD - SD CARD POLL MODE TEST!

API: MMC_open Successful
SD card Detected!
SD card is Standard Capacity Card
Memory Access will use Byte Addressing

API: MMC_write Successful

The code hangs at the following lines of code which are at approximately line numbers: 3803-3810 of file csl_mmcsd.c

                    do
                    {
                        status = hMmcsd->mmcRegs->MMCST0;
                        if((status & CSL_MMCSD_DATA_TOUT_CRC_ERROR) != 0)
                        {
                            reIssueReadFlag = 1;
                            break;
                        }

                    } while((status & CSL_MMCSD_READ_READY) != CSL_MMCSD_READ_READY);

Any clues for a solution to the code hanging issue,

Thanks,

AV.

over 15 years ago

0 AV54983 over 15 years ago

Intellectual 360 points

Dear All,

The CSL_MMCSD_SdCardFSExample also hangs at the same lines as mentioned above.

The CSL_MMCSD_intrExample hangs at while statement line 799 of csl_mmcsd_intr_example.c which is again

called/linked to mmr_read():

void mmcsdTransferDoneCallBack(void *mmcsdHandle)
{
    /* Wait for the MMCSD interrupt */
    while(gMmcIntr == FALSE);
    gMmcIntr = FALSE;
}

But I am surprised how the CSL_MMCSD_dmaExample worked fine !

Any hints/clues are most welcome.

Thanks in advance,

- AV.

0 Steve Tsang over 15 years ago in reply to AV54983

TI__Mastermind 23785 points

AV,

I did a bit on testing and have a few questions here would like to clarify.

1) You said you are using C5515 eZDSP but the test is VC5505_MMCSD.cmd? Which CSL version are you using?

2) Which Micro CD card using are using? Some card does not support same command.

Thanks,

Steve

0 AV54983 over 15 years ago in reply to Steve Tsang

Intellectual 360 points

Steve,

Thanks fofr your reply ( or rather questions ) .

Yes I am using the C5515 ezDSP but the .cmd file mentioned works fine.

I am using the CSL 2.1. I am using TRanscend micro SD.

My problem is solved. I had to upgrade my Code Generation Tool to 4.3.7.

Regds,

- AV.

0 Steve Tsang over 15 years ago in reply to AV54983

TI__Mastermind 23785 points

AV,

This is good news!

Steve

0 Steve Tsang over 15 years ago in reply to Steve Tsang

TI__Mastermind 23785 points

AV,

Could you tell us which version of code gen tool your were using before that is not working?

Thanks,

Steve

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CSL_MMCSD_SdCardExample the Writing takes place fine but during the reading phase the code hangs .