Hello,
I have problems with custom designed board. After soldering everything(w/o IC1,IC3) I flashed my firmware. USB device completely unrecognized.
I have soldered 1k5 resistor on 3V3 and D+. After connecting to computer I was able to see serial output on terminal program.
Then I have shorted pins 1-6 on IC1 to connect positive analog reference. After connecting, USB peripheral apparently died.
No matter what I flash, I get device descriptor request failed. I have also tried USB VCP project template, same result.
Any idea what did I do wrong? Is there any chance to get it working, besides soldering a new mcu?
Thanks in advance,
Stanislav
