Application data structure

data_structure_constants.cpp

// Buttons codes
#define btnRIGHT    0
#define btnUP       1
#define btnDOWN     2
#define btnLEFT     3
#define btnSELECT   4
#define btnNONE     5

// Delay between clock transitions
#define DELAY_VOLUME_TRANSITION 50

// Definition of the 3-dimension array
#define MENU_DEPTH 3
#define MENU_LINES 8
#define MENU_TEXT  16

// Arduino pin for backlight intensity control
#define BACKLIGHT_PIN 10

// Arduino pins connected to digital potentiometers
// for volume control
#define UPDOWN_PIN    11
#define INC_PIN       12