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CoffeeDisplay.ino
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CoffeeDisplay.ino
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// includes:
#include <EEPROM.h>
#include <LiquidCrystal.h>
const char leftButton = 3;
const char rightButton = 2;
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 7, 6, 5, 4);
// Grain characters
#define GRAIN 0
#define LEFT_ARROW 1
#define RIGHT_ARROW 2
byte grain[8] = {
0b00000,
0b01110,
0b11101,
0b11011,
0b11011,
0b10111,
0b01110,
0b00000
};
byte leftArrow[8] = {
0b00000,
0b00000,
0b00010,
0b00110,
0b01110,
0b00110,
0b00010,
0b00000
};
byte rightArrow[8] = {
0b00000,
0b00000,
0b01000,
0b01100,
0b01110,
0b01100,
0b01000,
0b00000
};
typedef struct _coffee_t {
int id;
char *name;
char strength;
} coffee_t;
// Coffees
#define COFFEE_FRANCAIS 0
#define COFFEE_ITALIEN 1
#define COFFEE_MOKA 2
#define COFFEE_COLOMBIE 3
#define COFFEE_BRESILIEN 4
#define COFFEE_COSTARICA 5
#define COFFEE_PAPOUASIE 6
#define COFFEE_MEXICAIN 7
#define COFFEE_INDIEN 8
#define COFFEE_EXPRESSO 9
#define COFFEE_MAX 10
coffee_t coffeesList[] = {
{ COFFEE_FRANCAIS, "Francais", 4 },
{ COFFEE_ITALIEN, "Italien", 4 },
{ COFFEE_MOKA, "Moka", 3 },
{ COFFEE_COLOMBIE, "Colombie", 3 },
{ COFFEE_BRESILIEN, "Bresilien", 2 },
{ COFFEE_COSTARICA, "Costa Rica", 2 },
{ COFFEE_PAPOUASIE, "Papouasie", 3 },
{ COFFEE_MEXICAIN , "Mexicain", 4 },
{ COFFEE_INDIEN, "Inde", 4 },
{ COFFEE_EXPRESSO, "Expresso", 4 },
{ COFFEE_MAX, NULL, 0 },
};
char leftCoffee = 0;
char rightCoffee = 0;
void setup() {
pinMode(leftButton, INPUT);
pinMode(rightButton, INPUT);
// Create custom caracters
lcd.createChar(GRAIN, grain);
lcd.createChar(LEFT_ARROW, leftArrow);
lcd.createChar(RIGHT_ARROW, rightArrow);
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
unsigned char value;
value = EEPROM.read(0);
if (value < COFFEE_MAX) {
leftCoffee = value;
}
value = EEPROM.read(1);
if (value < COFFEE_MAX) {
rightCoffee = value;
}
printLeft();
printRight();
}
void printLeft() {
lcd.home();
lcd.write((uint8_t) LEFT_ARROW);
lcd.print(" " + getCoffee(leftCoffee) + " ");
for (char i = 0; i < getStrength(leftCoffee); i++) {
lcd.write((uint8_t) GRAIN);
}
lcd.print(" ");
}
void printRight() {
lcd.setCursor(0, 1);
lcd.write((uint8_t) RIGHT_ARROW);
lcd.print(" " + getCoffee(rightCoffee) + " ");
for (char i = 0; i < getStrength(rightCoffee); i++) {
lcd.write((uint8_t) GRAIN);
}
lcd.print(" ");
}
void nextCoffee(char &coffee) {
coffee++;
if (coffee >= COFFEE_MAX) {
coffee = 0;
}
}
void loop() {
if (digitalRead(leftButton) == HIGH)
{
nextCoffee(leftCoffee);
printLeft();
EEPROM.write(0, leftCoffee);
delay(1500);
}
else if (digitalRead(rightButton) == HIGH)
{
nextCoffee(rightCoffee);
printRight();
EEPROM.write(1, rightCoffee);
delay(1500);
}
}
static String getCoffee(const char type) {
return coffeesList[type].name;
}
static char getStrength(const char type) {
return coffeesList[type].strength;
}