lcd_19264.h~

按键是比较复杂。可以用状态机表示。 每10mS执行一次键盘扫描任务 0、无键

#ifndef _LCD12864_ST7920_H
#define _LCD12864_ST7920_H
#include <avr/io.h>

#define LCD_PORT        PORTA
#define LCD_PIN         PINA
#define LCD_DDR         DDRA
#define LCD_SID         PA0
#define LCD_SCLK        PA1

#define	SET_BIT(BYTE, BIT)	((BYTE) |= (1<<(BIT)))
#define CLR_BIT(BYTE, BIT)	((BYTE) &= ~(1<<(BIT)))

#define LCD_SET_SID()   SET_BIT(LCD_PORT, LCD_SID)
#define LCD_CLR_SID()   CLR_BIT(LCD_PORT, LCD_SID)
#define LCD_SET_SCLK()  SET_BIT(LCD_PORT, LCD_SCLK)
#define LCD_CLR_SCLK()  CLR_BIT(LCD_PORT, LCD_SCLK)

#define SET_LCD_SID_INPUT()     (LCD_DDR &= ~(1<<LCD_SID))
#define SET_LCD_SID_OUTPUT()    (LCD_DDR |= (1<<LCD_SID))

void LCD12864_Init(void);
void LCD12864_SetXY(unsigned char , unsigned char);
void LCD12864_PutString(unsigned char x, unsigned char y, char *str);
void LCD12864_DrawInit(void);
void LCD12864_DrawPixel(unsigned char x, unsigned char y);
void LCD12864_DrawLine(unsigned char x1, unsigned char y1, unsigned char x2, unsigned char y2);

#endif