I am using a STM32F207IG microcontroller, a SPI NOR Flash (M25P16) with Keil::MDK-Middleware EFS v6.2.0.
Init and Mounting works. Even "fcheck", "finfo()" and "ffree()" works.
I can write a file successfully, with the Standard I/O Routines "fopen", "fputs", "fflush" and "fclose".
The problem arise when I try to reopen the file for read what I wrote, fopen return NULL and ffind return fsError.
What can be? What can I do or check?
You can turn on the Event Recorder in uVision to get more hints about this issue: www.keil.com/.../index.html http://www.keil.com/support/man/docs/uv4/uv4_db_dbg_evr.htm
Now I'm using also the Event Recorder. When I call "fcheck" the function return "fsOK", but in the Event Recorder there is write in Red "DriveCheckSuccess". Why the return of the function and the event is different?
After I call "fformat", the function return "fsMediaError" and in the Event Recorder there is in Red "FlashEraseChipFailed".
But when I call "ffree" and "finfo" both return "fsOK", and from the Event Recorder I can see the call to "FileAllocRead" to the right sector of the memory.
I check the CS/NSS signal with the oscilloscope and the signal work right with the Select and Deselect operations.