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Recently, I bought ULINKPro debugger. I tried to use that. It showed me USB communication failure.
I am confused that whether it is my CPU USB problem or ULINKPro USB problem..
Upto flash downloading working fine but when tried to enter into debug mode, it is showing Cannot access target, Shutdown debug session.
On command window, it is showing error57:illegal address access..USB communication failure.
I have searched for that error and I have put correct flash algorithm and flash download setting, but problem not resolved.
Why there is illegal address accessing....the same program with the same settings worked well for JLink adapter..
Anyone have idea..??
For USB communication failure, I recommend first trying unplug ULINKpro's USB cable from PC, and re-connecting.
If "USB communication failure" persists, we have a troubleshooting that you can step through with the ULINKpro: www.keil.com/.../ulinkpro_trblguide.htm
There is also an issue when using some versions of ST-Link with a ULINKpro, simultaneously: http://www.keil.com/support/docs/3856.htm
For the illegal memory error, refer to the following KB article: http://www.keil.com/support/docs/3508.htm