lcd.h

在cypress晶片上實驗讀取ps2 keyboard按鍵後顯示在lcd上,同時利用I2C寫入EEPROM

/*
 *	LCD interface header file
 *	See lcd.c for more info
 */

/* write a byte to the LCD in 4 bit mode */

extern void lcd_write(unsigned char);

/* Clear and home the LCD */

extern void lcd_clear(void);

/* write a string of characters to the LCD */

extern void lcd_puts(const char * s);

/* Go to the specified position */

extern void lcd_goto(unsigned char pos);
	
/* intialize the LCD - call before anything else */

extern void lcd_init(void);

extern void lcd_putch(char);

/*	Set the cursor position */

#define	lcd_cursor(x)	lcd_write(((x)&0x7F)|0x80)
#define	LCD_RW 		RB3
#define	LCD_RS 		RB4
#define LCD_EN 		RB5
#define	LCD_RW_DIR 	TRISB3
#define	LCD_RS_DIR 	TRISB4
#define LCD_EN_DIR 	TRISB5
#define LCD_DATA	PORTA
#define	LCD_STROBE()	((LCD_EN = 1),(LCD_EN=0))