i have problem in two programs
with wall detections(touch)
and wall detections(ultra sonic)

the while loop not take the function that go forward, someone knows why?

1st program
const tSensors touchSensor = (tSensors) S1;//sensor touch
task main()
{
while(SensorValue(touchSensor) == 0)
//go forware
{
motor[motorA]=10;
motor[motorC]=10;
wait1Msec(4550);
}
//go backward
motor[motorA]=-3;
motor[motorC]=-3;
wait1Msec(4550);

2nd program
const tSensors bumper = (tSensors) S1;//sensor touch
task main()
{
while(SensorValue(bumper) == 0)
//go forware
{
motor[motorA]=10;
motor[motorC]=10;
wait1Msec(4550);
}
//go backward
motor[motorA]=-3;
motor[motorC]=-3;
wait1Msec(4550);

What version of RobotC are you using? And could you please use the [code][/code] tags for your code? It makes it easier to read and understand.

i use the latest version 3.6

Ok well, I just took your code and indented it all myself. Several things stand out.

1. You don't have a closing brace for your task main()
2. You're not defining the S1 sensor type.
3. And I have no idea what you're trying to accomplish with "const tSensors touchSensor = (tSensors) S1;//sensor touch".

Try this code, it should work fine.



and,



FYI, these two programs are identical, they just have different names for the sensor. Also just wondering, why are your motor speeds so slow?

thanks a lot bro, i try again with these codes,
i test the robot's sensor because i have a project in robotC but my area it is small for this reason i put lower speed, to control easy the robot

i try with this code but the while loop not working, when the Lego touch in the wall not go back, how to check if the Lego's sensor working?

Ok, so you want it to go forwards until it hits the wall? If so, then try this:



I have commented out the wait time in the while loop, because if you do have it waiting it will only check the touch sensor every 4.55 seconds. That's bad. You also might get better results with some faster motor speeds. Even 25% would be good.

thanks again bro, i try again with this code

again not working bro,
how to check if the robot's sensor it working great?

Go to the "view" menu, and select touch sensor. That'll tell you if it's working or not.

thanks a lot bro

i not found the touch sensor in "view" menu
i uploaded the print screen

No, no, on the NXT. You scroll through it's menu screen until you see "View".

That's where my friends apostrophe went!

Sorry, I couldn't resist. If you look one my profile on of my interests is correct grammar.

No, no, I, am like, way, way, correct. We unfortunate Americans say "No, no" when we correct someone.