Compile Error Keypad Library

Projects Programming
1

Hi everybody,

I bought a 2x2 matrix keyboard which I want to connect to my Arduino Uno. I downloaded the keypad library ( Arduino Playground - HomePage) and copied it to the libraries folder. It is displayed in the libraries list in the Arduino IDE, but it does not work. I tested the example code as you see beloy and got the following error message. I am using IDE 1.0.1 on a Mac.

What is wrong? Please help me. Thank you very much.

Cheers,
Duesentrieb

#include <Keypad.h>

const byte ROWS = 4; //four rows
const byte COLS = 3; //three columns
char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'#','0','*'}
};
byte rowPins[ROWS] = {5, 4, 3, 2}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {8, 7, 6}; //connect to the column pinouts of the keypad

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup(){
  Serial.begin(9600);
}

void loop(){
  char key = keypad.getKey();

  if (key != NO_KEY){
    Serial.println(key);
  }
}

Error message:

sketch_aug29a_keypad_library_test:13: error: 'Keypad' does not name a type
sketch_aug29a_keypad_library_test.cpp: In function 'void loop()':
sketch_aug29a_keypad_library_test:20: error: 'keypad' was not declared in this scope
sketch_aug29a_keypad_library_test:22: error: 'NO_KEY' was not declared in this scope

2

I am using IDE 1.0.1 on a Mac.

Version 1.0.1 has a (fatal) flaw where missing include files are OK. They do not even generate a warning. I'd avoid that version until they fix the problem.

The rest of the error messages will go away when you get the library installed correctly. It is not, currently.