/**
 * A Mega644 LCD Test
 *
 * Written by Ruibing Wang (rw98@cornell.edu)
 * Slight mods for 644 by brl4@cornell.edu
 */

/** 
 * Use an 2x16 alphanumeric LCD connected to PORTC as follows:
 *  
 *	[LCD] -	[Mega644 Pin]
 *	1 GND -	GND
 *	2 +5V -	VCC
 *	3 VLC 10k trimpot wiper (trimpot ends go to +5 and gnd) 
 *	4 RS -	PC0
 *	5 RD -	PC1
 *	6 EN -	PC2
 *	11 D4 -	PC4
 *	12 D5 -	PC5
 *	13 D6 -	PC6
 *	14 D7 -	PC7 
 */
#include <avr/io.h>
#include <util/delay.h>
#include <avr/pgmspace.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lcd_lib.h"

const int8_t LCD_initialize[] PROGMEM = "LCD Initialized\0";
const int8_t LCD_line[] PROGMEM = "line 1\0";
const int8_t LCD_number[] PROGMEM = "Number=\0";

int8_t lcd_buffer[17];	// LCD display buffer
uint16_t count;			// a number to display on the LCD  
uint8_t anipos, dir;	// move a character around  

void init_lcd(void);

int main(void) {
	init_lcd();
	
	_delay_ms(500);
	LCDclr();
	
	CopyStringtoLCD(LCD_line, 8, 1);	// start at char=8 line=1
	
	CopyStringtoLCD(LCD_number, 0, 0);	// atart at char=0 line=0
	
	count=0;
	anipos = 0;
	LCDGotoXY(anipos,1);	//second line
	LCDsendChar('o');

	while (1) {
		sprintf(lcd_buffer,"%-i",count++);	//increment and format string                  
		LCDGotoXY(7, 0);
		LCDstring(lcd_buffer, strlen(lcd_buffer));		// display the count 
      	
		// now move a char left and right
		LCDGotoXY(anipos,1);	   //second line
      	LCDsendChar(' '); 
      	
		if (anipos>=7) 
      		dir=-1;
		if (anipos<=0 ) dir=1;
			anipos=anipos+dir;
		LCDGotoXY(anipos,1);	   //second line
		LCDsendChar('o');
      	
		_delay_ms(200);    //never do this in a realtime program
   }
}

void init_lcd(void) {
	LCDinit();	//initialize the display
	LCDcursorOFF();
	LCDclr();				//clear the display

	LCDGotoXY(0,0);
	CopyStringtoLCD(LCD_initialize, 0, 0);
}