Relay program?

[team877]

i was thinking i needed to set my x value to say (pwm 1) if i wanted it to work with my pwm. But i tried using pwm control with the x variable inside it and it just makes my pwm continually run is there something i'm missing

[Alan Anderson]

Show us the code you're trying to make work. Tell us exactly what you want it to do, and we can tell you what to change to make it do that.

[team877]

here is our code you asked for....

[paulcd2000]

where are you setting the value of x?

[xrabohrok]

Where is this file in the overall scheme of the robot? I don't know how to look at easy C to intuitively know what is going on, but it could be you are calling the function in the wrong place. Is the function called in user_routines.c? It should probably called somewhere from within Default_Routines(). I am assuming the easy C version of the code is organized the same way as just regular code.

[Alan Anderson]

Originally Posted by team877

here is our code you asked for....

void operatorControl ( void )
{
	unsigned char x;

	while ( 1 )
	{
		SetPwm ( 2 , x ) ; //  We’re setting are variable to the motor we want it to measure
		if ( 125 < x && x < 129 ) 
		{ // We want this relay to engage between these speeds
			SetRelay ( 1 , 1 , 0 ) ;
		}
		else
		{ // And if not turn the relay off
			SetRelay ( 1 , 0 , 0 ) ;
		}
	}
}

I don't see anything that sets the value of x. Did you forget the line that reads the joystick value?

(Is there a reason you posted it as a Word document containing a picture, instead of just copying the text? I don't use Word, and it was inconvenient to convert your file to a readable form.)

[team877]

the Setpwm (1, x) is a window that you put your variable in so "x" is set to the value of pwm 1

[Alan Anderson]

Originally Posted by team877

the Setpwm (1, x) is a window that you put your variable in so "x" is set to the value of pwm 1

Isn't it the other way around? As an output function, SetPwm( 1, x ) sets pwm 1 to the value of x. I'm not aware of a built-in way to read the present value of a pwm output using easyC.

So where in your program do you actually control the pwm output that you want to use as the trigger for your relay?

[Mark McLeod]

Normal operation would be to:

1) Get the desired drive value from the driver--GetOIAInput()

2) Do your tests on when you want your relay to be active--if () else

3) Output your relay command--SetRelay()

4) Set your PWM Output--SetPWM()