next topic »

[Reply #45 on:]

case "a":  ==> case 'a':
you must use single quotes, otherwise it is a string and the case will use the address of the string or so.

[Reply #46 on:]

single quotes worked, thanks

I still don't get the fuction of this code:

Code:

 int k = kbValue(keyboardValue);   // maps the value of the key being pressed "keypressed" i.e. 0-9
  
  Serial.println(k);                // print the value back to the Serial view window on your PC
  delay(1000);
}

// interpret the keyboard routine
int kbValue(int kbv)

[Reply #47 on:]

int k = kbValue(keyboardValue);

in plain English: kbValue() will do a lookup of keyboardValue (the parameter passed) and returns a value 0..16 to indicate the keypressed. This return value is assigned to the var k.

The names are a bit misleading here. Better names could be

- int rawKeyPressed = analogread(A0);  
- int key = ConvertRawToKey(rawKeyPressed);  
- switch(key)

etc

[Reply #48 on:]

try just single quotes, not double. Think you have to decide on one other  - is keypressed going to by type char, or type int (or byte)?

[Reply #49 on:]

yeah the single quotes worked on case

rob- thanks for the disambiguation

-carl