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..??
Have you tried calling Keil support with your details and serial numbers? This is primarily a user forum, not a direct support alternative.
The error is specific "USB communication failure", try a high grade shielded cable rated for USB 2.0 HS 480 Mbps. I've seen this with the cable my colleague supplied me with, which worked fine on the JLink but I suspect that only uses a FS 12 Mbps connection.