TMS320C6748: f_write function gives FR_DISK_ERR while running in timer function

Part Number:TMS320C6748

Hello,

We are using LCDKC6748 module and "pdk_omapl138_1_0_3" sdk. and we are using TIRTOS. Our application is Data logging.

When I use the "USB_HostMsc_lcdkOMAPL138_c674xExampleProject" to store data in 16 GB pendrive. The example is working fine.

When I modify the program to store the data which I aquire in a Timer function which runs at10ms I get FR_DISK_ERR  while using f_write funciton. I am trying to write only 10bytes to the file in the timer function very frequently I am getting FR_DISK_ERR  error. We I check the byteswritten variable during this error it was less than 10 bytes.

Kindly suggest me how to solve this problem

Thanks & regards

Navaneetha krishnan