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why stm32f411ve jump to Hard Fault

Question asked by Erkan MURTLU on Sep 24, 2017
Latest reply on Sep 25, 2017 by Erkan MURTLU

I want to write and read file using FATFS and USB DİSK Host Only middlewares on stm32f411ve but the processor jumps to hard fault when it makes "f_open(&MyFile,"example.txt",FA_CREATE_ALWAYS|FA_WRITE)!=FR_OK"  code. I don't understand why it does, one could run the app on that i watched video.