[SOLVED] Libraries that i download wont compile .

Projects Programming
4

holmes4:
Don't post screen captures - there almost unreadable Use copy and paste ffor both the code and the error message. Code in code tags of course.

Mark

sorry , here the code that i want to upload to my uno

/*
DFRobot LCD Shield for Arduino
Key Grab v0.4
Written by Glendon Klassen
gjklassen@gmail.com
http://www.sourceforge.net/users/ecefixer
http://ecefixer.tumblr.com

Special Thanks to keithspg@users.sf.net for Cytron device support ARVs.

Displays the currently pressed key on the LCD screen.

Key Codes (in left-to-right order):

None   - 0
Select - 1
Left   - 2
Up     - 3
Down   - 4
Right  - 5

*/

#include <LiquidCrystal.h>
#include <DFR_Key.h>

//Pin assignments for DFRobot LCD Keypad Shield
LiquidCrystal lcd(8, 9, 4, 5, 6, 7); 
//---------------------------------------------

const int DFRKEY = 0;
const int CYTRON = 1;

DFR_Key keypad(1);

int localKey = 0;
int prevNonWaitKey = 0;
int count = 0;
String keyString = "";
                 
void setup() 
{ 
  lcd.begin(16, 2);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Key Counter v0.4");
  delay(1000);
  
  /*
  OPTIONAL
  keypad.setRate(x);
  Sets the sample rate at once every x milliseconds.
  Default: 10ms
  */
  keypad.setRate(10);

}

void loop() 
{ 
  /*
  keypad.getKey();
  Grabs the current key.
  Returns a non-zero integer corresponding to the pressed key,
  OR
  Returns 0 for no keys pressed,
  OR
  Returns -1 (sample wait) when no key is available to be sampled.
  */
  localKey = keypad.getKey();
  
  if (localKey != SAMPLE_WAIT)
  {
    if (localKey != prevNonWaitKey)
    {
      if (localKey == UP_KEY)
      {
        count++;
      }
      else if (localKey == DOWN_KEY)
      {
        count--;
      }
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Current Count:");
      lcd.setCursor(0, 1);
      lcd.print(count);
      prevNonWaitKey = localKey;
    }
  }
}

and this is the error message

C:\Users\gissagiswara\Documents\Arduino\libraries\DFR_Key\DFR_Key.cpp: In constructor 'DFR_Key::DFR_Key(int)':
C:\Users\gissagiswara\Documents\Arduino\libraries\DFR_Key\DFR_Key.cpp:29: error: 'def' was not declared in this scope
C:\Users\gissagiswara\Documents\Arduino\libraries\DFR_Key\DFR_Key.cpp:29: error: 'DFRKEY' was not declared in this scope
C:\Users\gissagiswara\Documents\Arduino\libraries\DFR_Key\DFR_Key.cpp: At global scope:
C:\Users\gissagiswara\Documents\Arduino\libraries\DFR_Key\DFR_Key.cpp:84: error: no 'void DFR_Key::setARV(int, int)' member function declared in class 'DFR_Key'

PaulS:
User downloaded libraries do NOT go in the core library folder. Learn to download and install them properly.

Did you restart the IDE after mangling the install?

so where i can put the user download libraries ? YES i always restart my IDE after add downloaded libraries
before i got this problem , i've download LcdBarGraph libraries and put in the core library folder , and upload was success .
so i think i can download other libraries and try to learn the function of the code inside the libraries , but when i upload this libraries , it always said , i just want to know how my LCDkeypad Shield work and function

C:\Users\gissagiswara\Documents\Arduino\libraries\DFR_Key\DFR_Key.cpp: In constructor 'DFR_Key::DFR_Key(int)':
C:\Users\gissagiswara\Documents\Arduino\libraries\DFR_Key\DFR_Key.cpp:29: error: 'def' was not declared in this scope
C:\Users\gissagiswara\Documents\Arduino\libraries\DFR_Key\DFR_Key.cpp:29: error: 'DFRKEY' was not declared in this scope
C:\Users\gissagiswara\Documents\Arduino\libraries\DFR_Key\DFR_Key.cpp: At global scope:
C:\Users\gissagiswara\Documents\Arduino\libraries\DFR_Key\DFR_Key.cpp:84: error: no 'void DFR_Key::setARV(int, int)' member function declared in class 'DFR_Key'

#include <DFR_Key.h> <-- DFR_Key.h has been located right ?

SORRY FOR MY ENGLISH :smiley: