8051 exam4

exam_4.c

/*
 * exam_4.c
 *
 * Created: 2012/11/20 下午 01:55:10
 *  Author: Jason YiZhang Chen
 */

#include <reg51.h>

#define Data P0

sbit RS=0x96;  //P10 LCD指令/資料控制,
sbit RW=0x91;  //P11 LCD讀取/寫入控制,
sbit EN=0x97;  //P12 LCD致能輸出

//++++++++++++++++++++++++++++++位移控制+++++++++++++++++++++++++++++++++//
#define __MODEL1__	1		//0不動 1右移 2左移
#define __MODEL2__	2		//0不動 1右移 2左移
//++++++++++++++++++++++++++++++中斷控制+++++++++++++++++++++++++++++++++//
#define __TIMER1_SWITCH__	1		//TIMER1 中斷開關		0關			1開
#define __TIMER1_IP__		0		//TIMER1 優先權		0不具優先	1具優先
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++//
#define T			50000		//timer記數次數
//++++++++++++++++++++++++++++++FUNCTION+++++++++++++++++++++++++++++++++//
void delay_ms(unsigned int i);
void LCD_Data(char);
void LCD_Cmd(unsigned char);
void LCD_init();
void update_LCM();
void dsplay_LCM();
void init();
void inc_time();

char code Table[]={
	0x10,0x1f,0x02,0x0f,0x0a,0xff,0x02,0x00,				//年
	0x0f,0x09,0x0f,0x09,0x0f,0x09,0x13,0x00,				//月
	0x0f,0x09,0x09,0x0f,0x09,0x09,0x0f,0x00	};				//日
char min = 0, sec = 0, hr = 0;
char msg1[] = "2012\00011\00116\00200:00";
char msg2[] = "100360318       ";
unsigned char shift1 = 0, shift2 = 0;	

void main() {
	init();
	dsplay_LCM();
	while(1);
}

void timer1() interrupt 3 {
	static unsigned int i = 0, count = 0;

	TR1 = 0;
	if(++i == 20) {
		i = 0;
		inc_time();
	}
	if(++count == 3) {
		count = 0;
		#if __MODEL1__ == 1
			shift1--;
		#elif __MODEL1__ == 2
			shift1++;
		#endif
		
		#if __MODEL2__ == 1
			shift2--;
		#elif __MODEL2__ == 2
			shift2++;
		#endif
		update_LCM();
	}

	TH1 = (65536 - T) / 256;
	TL1 = (65536 - T) % 256;
	TR1 = 1;
}

void inc_time() {
	if(++sec == 60) {
		sec = 0;
		if(++min == 60) {
			min = 0;
			if(++hr == 24) {
				hr = 0;
			}
		}
	}
	msg1[11] = hr/10 + 0x30;
	msg1[12] = hr%10 + 0x30;
	msg1[14] = min/10 + 0x30;
	msg1[15] = min%10 + 0x30;
}

void init() {
	EA = 0;				//中斷關閉
	/***************IE***************/
	ET1 = __TIMER1_SWITCH__;
	/***************IP***************/
	PT1 = __TIMER1_IP__;
	/***************TIMER1設定***************/
	TMOD = 0x10;			//TIMER1 16位元計時器
	TR1 = 0;
	TH1 = (65536 - T) / 256;
	TL1 = (65536 - T) % 256;
	TR1 = 1;
	EA = 1;
}

void update_LCM() {
	unsigned char i;
	LCD_Cmd(0x80);     //游標由第一行開始顯示
	for(i = 0; i < 16; i++)
		LCD_Data(msg1[(i+shift1)%16]);
	LCD_Cmd(0xC0);     //游標由第二行開始顯示
	for(i = 0; i < 16; i++)
		LCD_Data(msg2[(i+shift2)%16]);
}



void dsplay_LCM() {
	unsigned char i;

	LCD_init();				//重置及清除LCD
	for(i=0;i<24;i++) { 			//寫入年月日字型
		LCD_Cmd(0x40+i);   		//指定CGRAM位址
		LCD_Data(Table[i]);		//寫入CGRAM資料
	}	
	update_LCM();
}

void delay_ms(unsigned int i) {
	int count;

	while(i != 0) {
		count = 120;
		while(count>0) count--;
		i--;
	}
}

/**********************************************
*函數名稱: LCD_Data
*功能描述: 傳送資料到文字型LCD
*輸入參數：dat
**********************************************/
void LCD_Data(char dat){		//傳送資料到LCD
    Data=dat;				//資料送到BUS
    RS=1;RW=0;EN=1;			//資料寫入到LCD內
    delay_ms(1);			//LCD等待寫入完成
    EN=0;				//禁能LCD
}
/**********************************************
*函數名稱: LCD_Cmd
*功能描述: 傳送命令到文字型LCD
*輸入參數：Cmd
**********************************************/
void LCD_Cmd(unsigned char Cmd) {		//傳送命令到LCD
    Data=Cmd; 					//命令送到BUS
    RS=0;RW=0;EN=1;				//命令寫入到LCD內
    delay_ms(1);				//LCD等待寫入完成
    EN=0;					//禁能LCD
}

/**********************************************
*功能描述: 啟始化文字型LCD
**********************************************/
void LCD_init(void) {   			//LCD的啟始程式
	LCD_Cmd(0x38);
	delay_ms(1);
	LCD_Cmd(0x38);
	delay_ms(1);
						/*0011 1000,8bit傳輸,顯示2行,5*7字型
						bit4:DL=1,8bit傳輸,
						bit3:N=1,顯示2行
						bit2:F=0,5*7字型*/
	LCD_Cmd(0x0c);
	delay_ms(1);  				/*bit2:D=1,顯示幕ON
						bit1:C=0,不顯示游標
						bit0:B=0,游標不閃爍*/
	LCD_Cmd(0x06);
	delay_ms(1); 				/*bit1:I/D=1,顯示完游標右移,
						bit0:S=0,游標移位禁能*/
	LCD_Cmd(0x01);
	delay_ms(1);		//清除顯示幕
	LCD_Cmd(0x02);
	delay_ms(1);		//游標回原位
}