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TMS320F28379D: Regarding SD card application development using Control card F3837x R1.3

Part Number: TMS320F28379D
Other Parts Discussed in Thread: CONTROLSUITE

I am using the control card above I maintained above. I go through the sample code for SPI SD card in control suite for this processor. It works fine It is reading the Directories which exist in SD card. 

Now I want to make directories , so I used "fresult =f_mkdir("mydir1");" to create a folder into SD card but It shows the error statement: "Error creating Directory and command returned error code is FR_RW_ERROR". 

I also investigate that from where the error is coming, I got that  the below statement gives the error "if (!move_window(fs, dsect)) return FR_RW_ERROR;" 

And In move_window function, a "disk_write function" is there, in this function the variable returned count should be 0 but it returns non-zero. 

I am not sure the right way to create a folder in SD card. Or the issue somewhere else. 

Please guide me to resolve this issue.

I am using the sample code "C:\ti\controlSUITE\device_support\F2837xD\v210\F2837xD_examples_Cpu1\sd_card"".

My CCS ver. is Version: 6.2.0.00050.

I am using 4GB SD card kingston make.

Ashutosh Bhatt