Robotc LCD

Programming Support ROBOTC Tech Support
#1

I’m trying to use an lcd display in Robotc but whenever I turn the cortex on while its not connected to a computer it just displays “Robotc” (see attached). However, when I plug the cortex into a computer (as long as the computer is on and awake) it goes to what I actually want to display. I’m not sure why it is doing this.
CAM00337.jpg

#2

Please post your code using the

 tags for us to take a look at; also, which port do you have the LCD plugged into?

Thank you,
John
#3

Sorry about that here is the code. I tried using uart 1 to start with but then tried it on 2 and got the same effect. I also noticed it works when a controller is plugged in instead of a computer.


#pragma config(Sensor, in1,    currentraw,     sensorNone)
#pragma config(Sensor, dgtl1,  RPMRaw,         sensorQuadEncoder)
#pragma config(Sensor, dgtl3,  TestEncoder,    sensorQuadEncoder)
#pragma config(Motor,  port7,            ,             tmotorServoContinuousRotation, openLoop)
#pragma config(Motor,  port8,            ,             tmotorVex269_MC29, openLoop)
#pragma config(Motor,  port9,            ,             tmotorVex393_MC29, openLoop)
//*!!Code automatically generated by 'ROBOTC' configuration wizard               !!*//

int MotorPower=0;
int Button=0;
int Time=0;
float RPM=0;
float RPM1=0;

task main()
{
	clearLCDLine (0);
	clearLCDLine (1);
	clearTimer (T1);
	clearAll(actOnSensors);
	while (true)
	{
		Time=time1[T1];
		Button=nLCDButtons;
		displayLCDString(0,0,"Motor Power=");
		displayLCDNumber(0,12,MotorPower);
		displayLCDString(1,0,"RPM=");
		displayLCDNumber(1,4,RPM);
		if (Time>=1000)
		{
			RPM1= SensorValue[RPMRaw];
			RPM=(abs((float)SensorValue [RPMRaw])/360)*60;
			clearLCDLine (1);
			clearAll(actOnSensors);
		}
		if (Time>=1000)
		{
			clearTimer (T1);
		}
		if (Button==4 && MotorPower<127)
		{
			MotorPower++;
			motor [port9] = MotorPower;
			wait1Msec (75);
			if (MotorPower==-99)
			{
				clearLCDLine (0);
			}
			if (MotorPower==-9)
			{
				clearLCDLine (0);
			}
			if (MotorPower==0)
			{
				clearLCDLine (0);
			}
		}

		if (Button==1 && MotorPower>-127)
		{
			MotorPower--;
			motor [port9] = MotorPower;
			wait1Msec (75);
			if (MotorPower==99)
			{
				clearLCDLine (0);
			}
			if (MotorPower==9)
			{
				clearLCDLine (0);
			}
		}
		if (Button==2)
		{
			clearLCDLine (0);
			MotorPower=0;
			motor [port9] = MotorPower;
		}
	}
}
#4