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ST-link communication failure

Question asked by Andrew Waterworth on Jan 31, 2018
Latest reply on Jan 31, 2018 by Clive One

Can anybody enlighten me as to why I am getting the( Error: jtag status contains invalid mode value - communication failure)  message and how to get past it!


The set up is system work bench.

Nucleo F401 and x-nucleo-idw01m1

and stm demonstration software examples.


Nucleo server socket example compiles and down loads to board,

The console shows it halted by debugger and some 5-10 secs later it reports the above error.

I have tried the DBGMCU_Config and that does nothing to stop the problem.

I did have it working and managed to load some dynamic web pages into the wifi chip.

I managed to corrupt the source code so deleated the original and reloaded the code from STM,  since then no joy


Help would be very much appreciated