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RTOS/PERFAUDIO-FIRMWARE-DA8XX: Unable to open FATFS filesystem

Part Number: PERFAUDIO-FIRMWARE-DA8XX

Tool/software: TI-RTOS

Hi,

I am trying an example " USB_HostMsc_evmOMAPL137_c674xExampleProject " in pdk_omapl137_1_0_7. It is returning "Failed to open FATFS". I debugged and go to know that in FATFS_open() function f_mount() function is not returning FR_OK. It returns 'FR_NOT_READY". May i know what are the possible reasons for this error? and any ways to solve it.

Note: I connected my sd card to the usb pins in board using a card reader. The card reader is getting activated. I am using a 16GB SD Card in FAT32 format

Regards,

Surya.