[Adam Shapiro]

Originally Posted by Avarik

Firstly, how would I set up a system to push 1 button to open and close pneumatics? I was thinking about having a state which is altered if the button is pushed, but I cannot figrure out how to do this (from decleration to initialization to writing the code!)

There could be another (better) way but the way I did it last year (now in C) would be as follows:

bool pressed=false; //is switch pressed (put this somewhere where it will remain globally constant)
if(p1_sw_top&&!pressed)
{
    pressed=true;//set the toggle value
    relay1_fwd=(!relay1_fwd);//set the relay state
}
else if(p1_sw_top)
{
    //do something else if you want (but you don't have to)
}
else
{
    pressed=false;//turn off the toggle
}

Originally Posted by Avarik

Secondly, how do I create a program which will overide all other code and execute a set of commands? This would be to use pneumatics to shift gears in a gearbox. I am unsure how to program the code, and set up overiding the system. I was thinking about using interupts, but I don't know how to call them (I have Kevin's code with the interupts added in.)

I'm not exactly sure what you need but you can use an if statement to check for a certain state and call functions you create (run_drive_code() and run_override_code() for example) based on the state. That would probably be the easiest method unless you need multiple override options in which case a switch statement would probably be useful.