Code compiles but no output on GPIO

General discussions about V-USB, our firmware-only implementation of a low speed USB device on Atmel's AVR microcontrollers
Post Reply
Posts: 1
Joined: Sat Oct 22, 2016 12:57 am

Code compiles but no output on GPIO

Post by Sam » Sat Oct 22, 2016 1:15 am

Apologies if this is a stupid question, I am a n00b with V-USB and this is my first project using it.

I have been working on a very basic test program with an ATTiny 2313 micro controller intended just to connect to a PC without any functionality. The code is from a web tutorial with some slight alterations to account for my using of a slightly different crystal. The code compiles and uploads to my micro just fine, but when probing the outputs with my oscilloscope I cannot see any signals. I have confirmed the micro, psu and crystal to be good via a "blink" program, but have not yet hooked up the diodes or resistors to allow USB communication. I have confirmed my scope if properly setup by probing a different USB device.

My main code is here:
And my usbconfig file is here:

I am doing this development in eclipse under Linux with an AVR dragon programmer.

Once again my apologies if this is a problem and my thanks for your assistance. If you need any other information please ask. Thanks. :D

Post Reply