Posted on February 24, 2014 at 05:41Hi there!
I have designed a board around stm32f4zg controllers. In my first attempt the board worked fine and everything went good. But suddenly one of my board stop connecting with st- link (one that comes embedded with discovery boards). I've made no pull-ups and pull down on swd pins as suggested in reference manual. after a few times my another board also failed to connect. The board which failed to connect shows permanent high logic on swdio and swclk pins. I also noticed that, the board which failed have little different programs than my good board. In my code I do not alter any gpios related top swd pins (I am a victim of this already :) ). Cant understand why boards are failing so frequently. However the program they contains works fine. Any suggestion will be appreciated.
Thanks
#st-link-not-connected-discovery
