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microSD card problem

Question asked by mao on Dec 10, 2016
Latest reply on Jan 15, 2017 by mao

I am testing the microSD card. The weird thing is that it works well in debug mode, but doesn't work in normal mode.

I set the breakpoint to a line at the very end in debug mode, before which the operation of microSD card is done. In debug mode, it works very well. But when I quit the debug mode, the sd card doesn't work. 

I am using keil, uvision as the IDE. The chip is STM32F405RGT6;

What should I do?

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