/* Tommy Thorn 1999 based on code by Brajer Vlado */

/* This LCD is wired as follows:

PA0-PA3: bit 4-7 on the LCD (data bits in 4-bit mode)
PA4:     E
PA5:     RS

RW isn't connected to a port but to forced low (write mode) as we
don't read anyway.

*/

/* The reason for using the conditional is that the argument `x' will
   always be a constant, thus reduced at compile time.  Using sbi/cbi
   is much more efficient and succint that using outp/inp */

#define LCD_E(x)  ({if (x) sbi(PORTA,4); else cbi(PORTA,4);})
#define LCD_RS(x) ({if (x) sbi(PORTA,5); else cbi(PORTA,5);})
#define LCD_RW(x) /* Nothing */
#define LCD_DATA(d) outp(((d)&0xF)|(inp(PORTA)&0xF0),PORTA)
#define LCD_INIT() outp(0x3F,DDRA); LCD_RS(0); LCD_RW(0) 

#define us 
#define ms * 1000

#define LCD_CTL_DISPON  4
#define LCD_CTL_CURSOR  2
#define LCD_CTL_BLINK   1


#include <io.h>
#include <stdio.h>
#include <stdarg.h>

typedef unsigned char byte;

extern unsigned char lcd_pos;

void lcd_delay(unsigned int p);
void toggle_E();
void lcd_cls();
void lcd_home();
void lcd_control(byte control);
void lcd_goto(byte mesto);
void lcd_putch(byte data);
void lcd_putstr(byte *data);
void printbin(byte x);
void printhex(byte i);
void print2(unsigned int x);
void print3(unsigned int x);
void print5(unsigned int x);
void print10(unsigned long x);
void lcd_init(void);
int printf(const char *format, ...);