hi, can anyone point me in the right direction to find examples of large c microcontroller programs?

 

Tell me what you want it for and I might send you one.

 

What uP? What is "large"?

 

Sorry I should of said "complex". I need to see something that constantly monitors a series of failsafe's i.e emergency stop switches while controlling the speed or torque of a DC motor through a varied PWM voltage or current.

I was thinking if this just used a load of if statements that just constantly scanned the inputs to the failsafe switches and the control in an infinite while loop.

 

That's a simple project.

If you have multiple safety switches, connect them to the same 8bit port. So all port pins are 1 when safe, but any switch activated will make that pin a 0.

Then check the port in one operation;
if(PORTB != 0xFF) // if a switch is tripped!

which is very simple and quick. Obviously if a switch is tripped, you can then do some tests and see which one it was. But the main code only needs that one line to check all switches are safe.