• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Subscribers 30 subscribers
  • Views 215 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AM2431: Is there any polling process during the reading/writing files on the SD card?

Qiao,Xue
Prodigy 210 points
Part Number: AM2431

Tool/software:

I am using SDK8.3.0 (I know is very old version,but i have to use this version.)

I am using SD Driver and FreertosFAT on my custom board with AM2431 CPU.

I would like to confirm that 

Is there any polling process during the reading/writing files on the SD card?

  • +1
    TI__Guru 69061 points

    Hello,

    Qiao,Xue said:
    Is there any polling process during the reading/writing files on the SD card?

    Yes, the driver implements polling based mechanism only. After sending the command for R/W, it polls the status registers in the controller to check the command completion status before proceeding further.

    Regards,

    Prashant

  • 0 in reply to Prashant Shivhare
    Prodigy 210 points

    Hello, thanks for your reply.

    About the polling process, I checked the driver source code and found an implementation similar to interrupt handling (mmcsd_v0.c MMCSD_isr()).

    I would like to confirm that

    1.Is the interrupt function implemented in Ver8.03? if it is not available in version 8.03, is it supported in the latest SDK?

    2.If i want to use the interrupt function, are there any examples about it?

  • 0 in reply to Qiao,Xue
    TI__Guru 69061 points
    Qiao,Xue said:
    Is the interrupt function implemented in Ver8.03?

    Not implemented.

    Qiao,Xue said:
    if it is not available in version 8.03, is it supported in the latest SDK?

    Yes, it is.

    software-dl.ti.com/.../DRIVERS_MMCSD_V0_LLD_PAGE.html

  • 0 in reply to Prashant Shivhare
    Prodigy 210 points

    Hello, thanks very much for your reply.

    I understand that interrupt processing has been implemented in the latest SDK, and I would like to enable the interrupt functionality in the SD driver.

    However, we are using SDK version 8.03 for our product, and it is currently difficult for us to upgrade to the latest SDK version.

    I would like to incorporate the interrupt function from the latest SDK into 8.03.

    Could you please let me know the changes needed?

  • 0 in reply to Qiao,Xue
    TI__Guru 69061 points
    Qiao,Xue said:
    Could you please let me know the changes needed?

    Hi, this is not feasible. The driver has undergone through major changes since SDK v8.3. If you want to leverage the interrupt functionality, please upgrade to the latest SDK. Otherwise, you may continue using the default polling mode as there may not be much to gain from the interrupt mode.