I am trying to use the JTAG ulink debugger to catch issues in communication in our USB driver on a MCBSTM32E board. The board is powered off the USB and if I run my code without the JTAG attached I can tell by my USB tester app that I have communication going on. When I hook up the JTAG and run the debugger I only hit my USB callback functions during the USB init.
I have the VUSB jumper set to GND and have tried many combinations of resets and reconnections of cables but I can't get the USB peripheral to behave normally when the JTAG debugger is running and power is being supplied over USB.
Am I out of luck?
Mark one for the good guys! I have never attempted to determine the cause and effect. High current or timing, I don't know. I just use the hub and continue with my main problem of debugging my "perfect" code. I get a lot of debugging practice! Bradford