While Loop

Projects Programming
1

In my code I have something such as:

DigitalRead(Sensor) = sensorVal;

While(sensorVal == HIGH){
DigitalWrite(MotorPin, LOW);}
DigitalWrite(MotorPin, HIGH);

However, the while loop never terminates regardless of what the sensorVal is. What am I doing wrong here?

2

Read this before posting a programming question

I'm surprised that compiled.

Copy and paste all your code please.

How to use this forum

3

Do you mean

sensorVal = DigitalRead(Sensor);

instead of

DigitalRead(Sensor) = sensorVal;

and then

While(sensorVal == HIGH)
{
   DigitalWrite(MotorPin, LOW);
   sensorVal = DigitalRead(Sensor);
}

DigitalWrite(MotorPin, HIGH);
4

It seem s you want to control something. Why not try

If ( digitalRead ( sensorval) == HIGH )
{
digitalWrite ( motorpin , LOW );
}
Else
{
digitalWrite ( motorpin, HIGH );

Never the less, NIck Gammon is expert; post your code.
BTW, take some advice as I was given: go to TOOLS and select AUTOFORMAT, place your parenthesis at the beginning of the next line,

5

What editor allows an upper case "Else"?

Another thing that happens sometimes (but not here) is that the "=" (which assigns a value) is used instead of "==" (which tests for a condition). But you got that.

As a total aside - here is a cute while loop little exercise i just bumped into.

** while(button(BUTTON1) || button(BUTTON2) || button(BUTTON3));**

button is a user defined function and BUTTON1 is an integer. This while loop cycle through each time and continues to cycle by testing the or (||) until button() returns 0 for all three.