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Keil: SWDIO no target connected

Question asked by Francesco Sfragara on Feb 19, 2018
Latest reply on Feb 19, 2018 by Andrew Neil

I'm using a stm32f407vg board. Suddenly I can't download my code to flash memory anymore. I'm using the keil toolchain. I tried stm32 st-link utility, but it can't connect to target either. I tried the option "connect under reset", but it didn't work. I tried to unistall and install again the st link drivers and utility, but it didn't work. 

 

Can somebody please help me? Thanks.

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