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Problem in upgrading STM32F4discovery firmware using USB

Question asked by Ali H. on Jun 21, 2013
Latest reply on Jun 22, 2013 by Ali H.
Hello everyone,
I'm working on STM32F4discovery board. I used the example in the firmware and it worked. But when i wanted to upgrade firmware with my own codes, it didn't work. I even used the codes in the board firmware (Demonstration code) and convert it to .BIN file.
everything is performed correctly and uploaded code and downloaded code are the same but application code didn't work.
I appreciate if anyone could help me

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