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Altera_Forum's avatar
Altera_Forum
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13 years ago

Button press to change state machine - "Can't resolve multiple constant drivers..."

I'm trying to set up a small demo to make a stepper motor move in various ways in which I'll need a series of buttons to control the action of the motors. To do this I'm using a state machi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

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Hi,

Only one process should generate "motor_state"

but you get "motor_state <= stop;" in your 2nd process !

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I realise that, and I realise that's where the error is from.

What I was confused about was how else I'm supposed to drop out of that state automatically after a number of cycles without that assignment there? I NEED two constant drivers as far as I can see.

EDIT: I think I found a solution, but it's giving me a weird error and I can't see any problem. argh! Code is in my post below.