I just finished setting up my BrickPi using the raspberrian image provided by Dexter. I had everything ready to go and then when I attempted to write my first program, I found that whenever I tried to get a motor to go backwards by providing it with a negative value, it would not respond.
Any help would be great.
did you try running the LEGO-Motor_test.py script to see if that works. If it works, copy the example. If it doesn’t something else is wrong and you may need to turn on debugging.
Agree with woolfel. What happens when you run this program: