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RL-FlashFs : fflush() & fclose()

Mehmet Can

I create or open one file with fopen, then im writing to file fputs,fprintf,fputc after these functions im checking files cursor position with ftell and its ok.When i use fflush function it is not writing anything to sd card , if i use fflush+ fclose or just fclose it is writing with out problem. Flush is returns 0.

What is the problem.

STM32F103 , SD CARD,RL-FLASHFS