fsm debuging

fsm debugging

Hi I started to check the fsm on real time and got some strange behaviors.

I tried working with SignalTap but I didn't like the way he display the waves and we didn't really get how to work with him.

So I went to ModelSim and created a test bench and got the next wave form

There is a lot of signals there but I can see that the logic is working, the only problem is that the pwm is not working (the signal in red) and I don't know why.

This design works when all the code is in the same file (without components)

I had the same thing with the encoder enable nut I succeeded in solving it by giving him a default value of '0'.

for another way to look were the program got stuck I used a 7 seg display

where at the commands bk,fd - 1,2 the fsm got stuck at state 15

and in the commands rt,lt - 3,4 the fsm got stuck at state 10