Marin Purgar

// LCD4Bits.pde
//
// Author: Marin Purgar - marin.purgar@gmail.com
//

#define LCD_RS	8
#define LCD_E	9

void lcdPulseEnable() {
	digitalWrite(LCD_E, HIGH);
	delayMicroseconds(1);
	digitalWrite(LCD_E, LOW);
	delayMicroseconds(1);
}

void lcdWriteNibble(uchar c){
	int i;
	for(i=0; i<4; i++){
		digitalWrite(4+i, (c >> i) & 0x01);
	}
	lcdPulseEnable();
}

void lcdWriteByte(uchar c, int mode) {
	digitalWrite(LCD_RS, mode);
	lcdWriteNibble(c >> 4);
	lcdWriteNibble(c);
}

void lcdSendControl(uchar c) {
	lcdWriteByte(c, LOW);
}

void lcdSendData(uchar c) {
	lcdWriteByte(c, HIGH);
}

void lcdSetAddress(uchar line, uchar column) {
	lcdSendControl( 0x80 + 0x40 * (line - 1) + (column - 1));
}

void lcdPrint(char *string) {
	int i;
	for( i=0; string[i]; i++) {
		lcdSendData(string[i]);
	}
}

void lcdInit() {
	int i;

	pinMode(LCD_E, OUTPUT);
	digitalWrite(LCD_E, LOW);
	pinMode(LCD_RS, OUTPUT);
	digitalWrite(LCD_RS, LOW);
	for(i = 4; i < 8; i++) {
		pinMode(i, OUTPUT);
	}
	delay(20);
	lcdWriteNibble(0x03);
	delayMicroseconds(1);
	lcdWriteNibble(0x03);
	delayMicroseconds(1);
	lcdWriteNibble(0x02);
	delayMicroseconds(200);
	lcdSendControl(0x28);		// 4 Bit, 2 Lines
	delayMicroseconds(1);
	lcdSendControl(0x0C);		// Display On
	delayMicroseconds(1);
	lcdSendControl(0x01);		// Clear display
	delay(2);
	lcdSendControl(0x02);		// Cursor home
	delay(2);
}

uchar line1[] = "Pinguino Team ";
uchar line2[] = "Croatia       ";

uchar line3[] = "Marin Purgar  ";
uchar line4[] = "Goran Horvatic";

void setup() {
	lcdInit();
}

void loop() {
	lcdSetAddress(1, 1);
	lcdPrint(line1);
	lcdSetAddress(2, 1);
	lcdPrint(line2);
	delay(3000);

	lcdSetAddress(1, 1);
	lcdPrint(line3);
	lcdSetAddress(2, 1);
	lcdPrint(line4);
	delay(3000);
}

// EOF