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SWDIO No target connected

I'm using a stm32f407vg board. Suddenly I can't download my code to flash memory. It gives me this error " Debugger - Cortex-M error: no target connected". In options for target > Debug > Settings in SW Device tab I see " SWDIO: Error No target connected".

How can I solve this?

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Jon Diller over 6 years ago +2

I had this same issue with my STM32F446RE Nucleo board. This is what I had to do to get my onboard ST-Link to talk to uVision again: -Download the STM32 ST-LINK Utility tool and try to connect to the...
Kevin over 6 years ago in reply to Andy Neil +1

I assume you are connecting using the on board debugger. If so, here are some ideas for troubleshooting a ST-Link. I) Test with a pack example the pack example are already setup to work on a...

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0 ling020feng over 3 years ago

Maybe some of the circuits on the board are powerless
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0 ling020feng over 3 years ago

Maybe some of the circuits on the board are powerless
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