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Topic: Help w/ Project 2 - Spaceship Interface Code (Read 5232 times) previous topic - next topic

CharF

Mar 08, 2013, 08:11 pm Last Edit: Mar 08, 2013, 08:19 pm by CharF Reason: 1
I'm starting the second project and get the response "void setup()" as an error.  I've written all the code as it is (or as I think it is) in the book, but something is wrong.  "void setup()" is the error I get when I include the text from the top shaded box on page 37 of book:

void setup () {
}

void loop () {
}

When I delete the text from the top shaded box on page 37, I get this error instead: "switchState" was not declared in this scope.
I considered starting with code in the second shaded box because it has a "1" next to the first line... my thinking is this should be the first line of code.  Still, no-worky.

With this error, "switchState" was not declared in this scope, the following line is highlighted in yellow: if (switchState == LOW) {

How do I get this code to work?  The on-line videos of the code for this project at RS look different than what's in the book, but I've got the book and want to use it for instruction.  Thanks.

CharF

Problem is solved.

If anyone has the same problem, I found code for this project by clicking A) Arduino icon, B) File, C) Examples, D) 10.StarterKit, and then E) p02_SpaceshipInterface

Uploading this sketch made made project #2 work.  It looks like the codes for all projects are listed here, and don't have to be typed by the user.

Good luck with your projects!

pprovenzano

I had the same problem. When i changed the name of the variable from "switchState" to "switchstate" everything worked fine.

rcarver445

it gave me a different issue i wrote the code from the book like this:
int switchState = 0;
void setup() {
  pinMode (3,OUTPUT);
  pinMode (4,OUTPUT);
  pinMode (5,OUTPUT);
  pinMode (2,INPUT);

}

void loop(){
  switchState = digitalRead(2);
  // this is a comment
  if (switchState == LOW);{
    digitalWrite(3, HIGH);
    digitalWrite(4, LOW);
    digitalWrite(5, LOW);
  }
  else{
    digitalWrite(3, LOW);
    digitalWrite(4, LOW);
    digitalWrite(5, HIGH);
   
    delay(250);//wait for a quarter second
    //toggle the LEDs
    digitalWrite (4, HIGH);
    digitalWrite (5, LOW);
    delay(250);
  }
}


and it gave error compiling stating "else without previous if" ???????

RussellD

Hi rcarver445,

If you look closely, I believe your problem is with a misplaced semicolon on the line with your if statement:
    if (switchState == LOW);{
should be
    if (switchState == LOW) {

I hope this helps!

tacoguy347

can someone tell me whats wrong here please because when I click to verify its giving me the void setup() { error.....thanks

int switchstate = 0;
void setup() {
  pinMode(3,OUTPUT);
  pinMode(4,OUTPUT):
  pinMode(5,OUTPUT);
  pinMode(2,INPUT);
}
void loop() {
  switchstate = digitalRead(2);
  // hi im awesome
  if (switchstate == LOW) {
    // botton is not pushed
    digitalWrite(3, HIGH); // green led
    digitalWrite(4, LOW); // red led
    digitalWrite(5, LOW); // red led
  }
  else { // the button is pressed
    digitalWrite(3, LOW);
    digitalWrite(4, LOW);
    digitalWrite(5, HIGH);
    delay(250); // wait quarter second
    // toggle leds
    digitalWrite(4, HIGH);
    digitalWrite(5, LOW);
    delay(250);
  }
} // go back to loop

dannable

@Tacoguy347

As I answered in your other posting:

Don't add your question to someone else's thread - that's called Thread Hijacking.

Post your code in [code][/code] tags so it formats correctly.

What error do you get?

All of this is in the post 'How to use this forum - please read.' at the top of the section.

If you had done this then I'd probably be addressing your issues rather than having to ask for this.
Beginners guide to using the Seeedstudio SIM900 GPRS/GSM Shield

dannable

You have a colon instead of a semicolon.

Code: [Select]
  pinMode(4,OUTPUT):
should be
Code: [Select]
  pinMode(4,OUTPUT);
Beginners guide to using the Seeedstudio SIM900 GPRS/GSM Shield

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