Atmega128

컴파일러

http://easynews.dl.sourceforge.net/sourceforge/winavr/WinAVR-20060421-install.exe

 

 

회로도  http://dubel.org/atmel/devatmel.sch

회로기판  http://dubel.org/atmel/devatmel.brd

 

/**
 * Hitachi HD44780 interface code. Provides initialization and functions
 * to write data and commands to a display. The code is written for a
 * 20x4 display, but the line wrap constants can be changed for other displays.
 * The display should be connected as follows to an available port on the atmel:
 * PORTx [7:0] = E1 E0 RW RS D7 D6 D5 D4 (E1 is not normally used)
 * Define your LCD port in lcd.h. Make sure that port is set as output,
 * DDRx = 0xFF;
 * Call LCD_init() before sending commands or data.
 * us50_sleep() is defined as a 50uSec delay. Adjust the passed parameter
 * accordingly for your available delay routine.
 * Note: RW on the display can be tied to ground to save a pin.
 * The source compiles on avr-gcc
 */
#include "lcd.h"
#include "bios.h"
int pos = 0;
void LCD_command(int db)
{
   LCD = (db >> 4) | E0;
   us50_sleep(1);
   LCD = db >> 4;
	us50_sleep(5);
   LCD = (db & 0x0F) | E0;
   us50_sleep(1);
   LCD = db & 0x0F;
	us50_sleep(100);
}
/**
 * Sends the command to clear the display, and resets the position
 * variable (used to track line wrap).
 */
void LCD_clear()
{
   //Clear Home
   LCD_command(0x01);
   pos = 0;
}
/**
 * Initialize a Hitachi 4x20 4 bit mode display
 * E1 E0 RW RS D7 D6 D5 D4
 */
void LCD_init()
{
   us50_sleep(300);   //15
   //initialize to 4 bit mode:
   LCD_command(0x33);
   us50_sleep(100);
   LCD_command(0x32);
   //2 lines 5x8 font
   LCD_command(0x28);
   //Display, no Curser, no Blink
   LCD_command(0x0C);
   // F curser and blink, E just curser
   LCD_clear();
}
/**
 * Allows you to print a string of data. While this method works fine, it does
 * not allow for special formatting such as printf. It requires null terminated
 * strings. For special formatting, call fdevopen(LCD_data, NULL, 0); after
 * initializing the display, and use printf instead to write data.
 */
void LCD_string(char db [])
{
	for (; *db!='\0';db++)
      LCD_data(*db);
}
/**
 * Moves the curser to the passed row and column, starting at (0,0)
 * written for a 4x20 display.
 */
void LCD_moveTo(int row, int col)
{
   pos = (row*20) + col;
   if (pos<20)
   LCD_command(0x80 | pos);
   if (pos>=20 && pos<40)
     LCD_command(0x80 | (pos%20 + 0x40));
   if (pos>=40 && pos<60)
     LCD_command(0x80 | (pos%40 + 0x14));
   if (pos>60)
     LCD_command(0x80 | (pos%60 + 0x54));
}
/**
 * This takes care of line wrap for a 20x4 display. The line wrap positions
 * could be defined in constants for other popular displays, such as 16x2.
 */
void LCD_data(char db)
{
   // proper line wrap:
   if (pos==20)
     LCD_command(0xC0);
   if (pos==40)
     LCD_command(0x94);
   if (pos==60)
     LCD_command(0xD4);
   //first nibble & strobe
   LCD = (db >> 4) | E0 | RS;
	us50_sleep(1);
   LCD = (db >> 4) | RS;
	us50_sleep(1);
   //second nibble & strobe
   LCD = (db & 0x0F) | E0 | RS;
   us50_sleep(1);
   LCD = (db & 0x0F) | RS;
   us50_sleep(1);
   if (++pos==80)
     pos = 0;
}

헤더파일

#define E0 0x40
#define RS 0x10
#define LCD PORTA
extern void LCD_command(int db);
extern void LCD_clear(void);
extern void LCD_string(char db []);
extern void LCD_init(void);
extern void LCD_moveTo(int row, int col);
extern void LCD_data(char db);

                                     http://dubel.org/atmel/hd44780.pdf

 

 

캐드 프로그램 이글(독수리) 다운로드

ftp://ftp.cadsoft.de/eagle/program/4.16r1

ftp://ftp.cadsoft.de/eagle/program/4.16r1/eagle-win-eng-4.16r1.zip (영어 윈도우즈환경용)

ftp://ftp.cadsoft.de/eagle/program/4.16r1/eagle-win-eng-4.16r1.exe