scope error not making sense

Forum 2005-2010 (read only) Software Syntax & Programs
1

I get the following error in my sketch (its my first).

error: 'currentValue' was not declared in this scope In function 'void loop()':
At global scope:

Here is the sketch in its entirety (reads accelerometer data and puts it on a serial display (16x2)
Its not done yet and needs other polishing...plus there is no rush as arduino's are backordered at sparkfun:

long highValue=0.0;
long currentValue=0.0;

void setup()
{
  Serial.begin(9600);
  backlightOn();
  displayWelcome();
}

//in order to do a 1.11 style output two ints are required
// 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 (pin)
// \ \ \ \ \ \ \ | / / / / / / / (semi analog)
// 0 . 1 2 C u r | 0 . 1 3 H i      
void loop()
{  
  currentValue=0.0;
  int firstPart=0;
  int secondPart=0;
  currentValue = getAccelValue();
  //split for prettyfied output 
  firstPart = (int)(currentValue);
  secondPart = (int)(currentValue * 100); //nothing expected to beat 1g
  
  selectLineOne();
  delay(100);
  barchart(currentValue);
  selectLineTwo();
  delay(100);
  Serial.print(firstPart);
  delay(100);
  Serial.print(".");
  delay(100);
  Serial.print(secondPart);
  delay(100);
  Serial.print("CUR/HI");
  delay(100); 
  
  value=(getMaxValue(currentValue));
  firstPart = (int)(currentValue);
  secondPart = (int)(currentValue * 100); //nothing expected to beat 1g
  Serial.print(firstPart);
  Serial.print(".");
  Serial.print(secondPart);
  delay(300);
  clearLCD();
}

void displayWelcome(){
   selectLineOne();
   Serial.print("Danger to the");
   delay(100);
   selectLineTwo();
   delay(100);
   Serial.print("manifold!!!"); 
}

float getAccelValue(){
   return (random(1)); 
}

float getMaxValue(currentValue){
 if (currentValue > highValue){
   highValue=currentValue;
 }
 return (highValue); 
}

void barchart(currentValue) {//makes a simple bar chart on the top line
  
} 

void selectLineOne(){  //puts the cursor at line 0 char 0.
   Serial.print(0xFE, BYTE);   //command flag
   Serial.print(128, BYTE);    //position
}
void selectLineTwo(){  //puts the cursor at line 0 char 0.
  Serial.print(0xFE, BYTE);   //command flag
  Serial.print(192, BYTE);    //position
}

void clearLCD(){
  Serial.print(0xFE, BYTE);   //command flag
  Serial.print(0x01, BYTE);   //clear command.
}
void backlightOn(){  //turns on the backlight
  Serial.print(0x7C, BYTE);   //command flag for backlight stuff
  Serial.print(157, BYTE);    //light level.
}
void backlightOff(){  //turns off the backlight
  Serial.print(0x7C, BYTE);   //command flag for backlight stuff
  Serial.print(128, BYTE);     //light level for off.
}
void serCommand(){   //a general function to call the command flag for issuing all other commands   
  Serial.print(0xFE, BYTE);
}
2

probably because you declare currentValue as a (long) integer, then assign it a floating point value in a couple of places.

-j

3

...and I feel like an idiot. :slight_smile: [smiley=dankk2.gif]

Thanks for pointing that out.