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Stm32f4 fatfs sdio problem

Question asked by eb3484 on Nov 30, 2016
Latest reply on Dec 5, 2016 by Radek R
I am using fatfs sdio with my stm32f429 mcu. When i use f_open function in main loop it works well, but when i use it in timer interrupt callback function it fails, it does not return from fatfs. what can the relationship be between timer interrupt and fatfs? Any advise??