Problem with f_read and f_lseek in fatFs

[sahar shakoori]

Posted on January 07, 2018 at 15:33

I'm trying to connect to a2GB sd card class 6 with stm32f091cctx MCU via SPI. Using fatFs library ver. R0.13a I'm able to mount the drive and open the file with f_mount and f_open functions. But when it comes to reading from file, it just freezes somewhere in f_read function. Also when I try to change the position of pointer with f_lseek, again it freezes. f_lseek works only when I write it as f_lseek(&MyFile, 0).

This part of my code is as below:

if(FATFS_LinkDriver(&SD_Driver, SDPath) == 0)
 {
 f_mount(&SDFatFs, (TCHAR const*)SDPath, 1);
 f_open(&MyFile, 'SAMPLE1.WAV', FA_READ);
 f_lseek(&MyFile, 200);
 f_read(&MyFile, rtext, 1000, (UINT*)&bytesread);
 }�?�?�?�?�?�?�?

#stm32f0 #fatfs #sd-card #spi

[Imen.D]

Posted on January 09, 2018 at 11:40

Hello,

Please refer to the following discussions if you have similar issue:

-

https://community.st.com/0D50X00009bMM8bSAG

-

https://community.st.com/0D50X00009XkWyLSAV

Best Regards,

Imen.

[sahar shakoori]

Posted on January 10, 2018 at 15:58

thank you so much

[Tesla DeLorean]

Posted on January 10, 2018 at 16:18

Not sure how applicable SDIO implementation details are to SPI. Assume FatFs is solid and you need to focus on testing and validating your code in DISKIO.C and below.