Catch 22 on reset with stm32f303 using ST-Link

[gbigden]

Posted on April 24, 2015 at 15:14

The problem is simple. I uploaded a buggy program using ST-Link to a stm32f303 prototype board. The bug was that the routine that kicks the watchdog in the power supervisor does not work. Therefore it keeps resetting the MCU. While this is happening I cannot connect using ST-Link in any mode. Anything I'm missing or is it soldering time?

[Tesla DeLorean]

Posted on April 24, 2015 at 15:26

Pull BOOT0 High

Or try other ''connect under reset'' ''hold in reset'' type options

[gbigden]

Posted on April 24, 2015 at 15:39

BOOT0 is tied low at present, and I have tried all the ST-Link options. I think it doesn't like the reset line flipping up and down while it is trying to connect. I'll probably just do the capacitor to GND on the NRST reset line

[Tesla DeLorean]

Posted on April 24, 2015 at 17:01

And if you pull it into a high state at reset it will stop running your buggy code and you'll be able to erase it, and start over...