STM32F4 Disco Connect Under Reset

monta · ‎2015-07-20

Posted on July 20, 2015 at 21:54

Hi there , I had my STM32F407VG discovery board for a while now, till a few minutes earlier, I was trying to interface a button to PA13 ( I chose PA13 randomaly) to create a simple interaface for my project , but once I tired the button few times I did not work, What's even worse now my Discovery board is not detected by CooCox and on the ST Link Utility it says ''Cannot Connect to target , please Connect under Reset'' (which works).

How Can it revert it back to how it was ? Did I mess up anything ? Does PA13 have to do with anything of this ??

Thank you !!!

Tesla DeLorean · ‎2015-07-20

Posted on July 20, 2015 at 22:53

PA13 is SWDAT, it's part of the debug interface.

Strap BOOT[0] High/VDD and erase the part with the ST-LINK Utilities. This will run the System Loader, instead of your code which immediate breaks the debugger's connection.

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monta · ‎2015-07-20

Posted on July 20, 2015 at 23:13

Thank you !! as always you're the best !