原标题：DS12887(时钟日历芯片) c语言驱动程序

**************** 调试******************/

管脚配置：

MOT: 接地

CS: 接地 地址：0xFF00

AS: 接 ALE

R/W: 接 RW

DS: 接 RD

RESET: 接高

IRQ: 空

SQW: 空

*/

＃i nclude

＃i nclude

/*************************/

#define TM_SEC XBYTE[0xFF00]

#define TM_MIN XBYTE[0xFF02]

#define TM_HOU XBYTE[0xFF04]

#define DAY XBYTE[0xFF06]

#define DATE XBYTE[0xFF07]

#define MONTH XBYTE[0xFF08]

#define YEAR XBYTE[0xFF09]

#define AM_SEC XBYTE[0xFF01]

#define AM_MIN XBYTE[0xFF03]

#define AM_HOU XBYTE[0xFF05]

#define REG_A XBYTE[0xFF0a]

#define REG_B XBYTE[0xFF0b]

#define REG_C XBYTE[0xFF0c]

#define REG_D XBYTE[0xFF0d]

/********************************************************************/

#define LCDIO P2

#define LINE1 0

#define LINE2 1

#define HIGH 1

#define LOW 0

#define CLEARSCREEN LCD_en_command(0x01)

#define LCD_DELAY_TIME 40

/*******************************************************************/

sbit RS=P0^7; //数据、命令选择 1：数据 0：指令 4脚

sbit RW=P0^6; //读、写操作选择 1：读 0：写 5脚

sbit E=P0^5; //使能信号 6脚

/********************************************************************/

void LCD_delay(void);

void LCD_en_command(unsigned char command);

void LCD_en_dat(unsigned char temp);

void LCD_set_xy( unsigned char x, unsigned char y );

void LCD_write_char( unsigned x,unsigned char y,unsigned char dat);

void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s);

void LCD_init(void);

/********************************************************************/

void Set_calendar(void);

void Read_calendar(void);

void Start_calendar(void);

void Display_calendar(void);

void Stop_calendar(void);

/********************************************************************/

void delay_nms(unsigned int n);

/********************************************************************/

code unsigned char calendar_day[7][3]={"MON","TUE","WEN","THU","FRI","SAT","SUN"};

unsigned char calendar_time[7]={05,8,16,18,58,55,2}; /* 05/8/16 18:58:00 星期二*/

code unsigned char at[7]={9,8,7,4,2,0,6}; /* 年、月、日、时、分、秒 、星期*/

unsigned char xdata *calendar_address=0xff00;

void main(void)

{

LCD_init();

//Set_calendar();

Start_calendar();

Stop_calendar();

while(1)

{

Read_calendar();

Display_calendar();

}

}

/********************************************************************/

/******************** LCD PART *************************************/

void LCD_delay(void)//延时子函数

{

unsigned char i;

for(i=LCD_DELAY_TIME;i>0;i--); //保证lcd复位的最小延时

}

void LCD_en_command(unsigned char command)//写命令函数

{

LCDIO=command;

RS=LOW;

RW=LOW;

E=LOW;

LCD_delay();

E=HIGH;

}

void LCD_en_dat(unsigned char dat)//写数据函数

{

LCDIO=dat;

RS=HIGH;

RW=LOW;

E=LOW;

LCD_delay();

E=HIGH;

}

void LCD_set_xy( unsigned char x, unsigned char y ) //设置地址函数

{

unsigned char address;

if (y == 0)

address = 0x80 + x;

else

address = 0xc0 + x;

LCD_en_command(address);

}

void LCD_write_char( unsigned x,unsigned char y,unsigned char dat)//写字符函数

{

LCD_set_xy( x, y );

LCD_en_dat(dat);

}

void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s)//写字符串函数

{

LCD_set_xy( X, Y ); //写地址

while (*s) // 写显示字符

{

LCDIO=*s;

LCD_en_dat(*s);

s ++;

}

}

void LCD_init(void)//初始化子函数

{

CLEARSCREEN;//清屏

LCD_en_command(0x38);//设置8位串数据格式

LCD_en_command(0x0c);//开显示器

LCD_en_command(0x80);//显示起始地址

CLEARSCREEN;//清屏

}

/********************************************************************/

void Set_calendar(void) //设置系统时间

{

unsigned char i;

REG_B=0x80;

for(i=0;i<9;i++)

*(calendar_address+at[i])=calendar_time[i];

}

void Read_calendar(void) //读取系统时间

{

unsigned char temp,i;

REG_B=0x06;

do{ temp=REG_A;}

while(temp&0x80);

for(i=0;i<7;i++)

calendar_time[i]=*(calendar_address+at[i]);

}

void Start_calendar(void) //启动时钟

{

REG_A=0x20;

REG_B=0x06;

}

/********************************************************************/

void Display_calendar(void)

{

LCD_write_string(0,LINE1," ");

LCD_write_string(0,LINE1,"20 - - ");

LCD_write_char(0x02,LINE1,(calendar_time[0]/10)|0X30);

LCD_write_char(0x03,LINE1,(calendar_time[0]%10)|0X30);

LCD_write_char(0x05,LINE1,(calendar_time[1]/10)|0X30);

LCD_write_char(0x06,LINE1,(calendar_time[1]%10)|0X30);

LCD_write_char(0x08,LINE1,(calendar_time[2]/10)|0X30);

LCD_write_char(0x09,LINE1,(calendar_time[2]%10)|0X30);

if(calendar_time[6]==1)

LCD_write_string(0x0d,LINE1,"Mon");

if(calendar_time[6]==2)

LCD_write_string(0x0d,LINE1,"Tue");

if(calendar_time[6]==3)

LCD_write_string(0x0d,LINE1,"Wen");

if(calendar_time[6]==4)

LCD_write_string(0x0d,LINE1,"Thu");

if(calendar_time[6]==5)

LCD_write_string(0x0d,LINE1,"Fri");

if(calendar_time[6]==6)

LCD_write_string(0x0d,LINE1,"Sat");

if(calendar_time[6]==7)

LCD_write_string(0x0d,LINE1,"Sun");

LCD_write_string(0,LINE2," : :");

LCD_write_char(0x08,LINE2,(calendar_time[3]/10)|0X30);

LCD_write_char(0x09,LINE2,(calendar_time[3]%10)|0X30);

LCD_write_char(0x0b,LINE2,(calendar_time[4]/10)|0X30);

LCD_write_char(0x0c,LINE2,(calendar_time[4]%10)|0X30);

LCD_write_char(0x0e,LINE2,(calendar_time[5]/10)|0X30);

LCD_write_char(0x0f,LINE2,(calendar_time[5]%10)|0X30);

}

void Stop_calendar(void)

{

REG_A=0x70;

}

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