#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit lcdrs = P0^0;
sbit lcden = P0^2;
sbit sh = P0^0; //595
sbit ds = P0^1;
sbit st = P0^2;
sbit RST = P0^3; //1302
sbit SCK = P0^4;
sbit IO = P0^5;
//DS1302地址定义
#define ds1302_sec_add 0x80 //秒数据地址
#define ds1302_min_add 0x82 //分数据地址
#define ds1302_hr_add 0x84 //时数据地址
#define ds1302_date_add 0x86 //日数据地址
#define ds1302_month_add 0x88 //月数据地址
#define ds1302_day_add 0x8a //星期数据地址
#define ds1302_year_add 0x8c //年数据地址
#define ds1302_control_add 0x8e //控制数据地址
#define ds1302_charger_add 0x90
#define ds1302_clkburst_add 0xbe
uchar dis_time_buf[16]={0};
//初始时间定义
uchar time_buf[8] = {0x20,0x10,0x06,0x01,0x23,0x59,0x55,0x02};//初始时间2010年6月1号23点59分55秒 星期二
//功能:延时1毫秒
//入口参数:x
//出口参数:无
//说明:当晶振为12M时，j<112；当晶振为11.0592M时，j<122
void Delay_xms(uint x)
{
uint i,j;
for(i=0;i<x;i++)
for(j=0;j<122;j++);
}
//功能：12us延时
//STC89C52为1T单片机,即1个时钟/机器周期,速度为AT89C52的12倍
void Delay_xus(uint t)
{
for(;t>0;t--)
{
_nop_();
}
}
//写入595
/****************写入595******************************/
void write_595(uchar date)//写入595
{
uchar i;
for(i = 0; i < 8; i++) {
sh = 0; ds = date & 0x80;
sh = 1; date <<= 1;
}
}
//写指令函数
/****************写指令******************************/
void Write_Instruction(uchar com) //写指令
{
write_595(com); lcdrs = 0;//写入指令
st = 1; st = 0; //令595输出, 并用EN输出一个高脉冲
}
//写数据函数
/****************写数据******************************/
void Write_Data(uchar dat) //写数据
{
write_595(dat); lcdrs = 1;//写入数据
st = 1; st = 0; //令595输出, 并用EN输出一个高脉冲
}
//字符显示初始地址设置
void LCD_SET_XY(uchar X,uchar Y)
{
uchar address;
if(Y==0)
address=0x80+X;//Y=0,表示在第一行显示，地址基数为0x80
else
address=0xc0+X;//Y非0时，表时在第二行显示，地址基数为0xC0
Write_Instruction(address);//写指令，设置显示初始地址
}
//在第X行Y列开始显示Wdata所对应的单个字符
void LCD_write_char(uchar X,uchar Y,uchar Wdata)
{
LCD_SET_XY(X,Y);//写地址
Write_Data(Wdata);//写入当前字符并显示
}
//清屏函数
void LCD_clear(void)
{
Write_Instruction(0x01);
Delay_xms(5);
}
//显示屏初始化函数
void LCD_init(void)
{
Write_Instruction(0x38); //8bit interface,2line,5*7dots
Delay_xms(5);
Write_Instruction(0x38);
Delay_xms(5);
Write_Instruction(0x38);
Write_Instruction(0x08); //关显示，不显光标，光标不闪烁
Write_Instruction(0x01); //清屏
Delay_xms(5);
Write_Instruction(0x04); //写一字符，整屏显示不移动
//Write_Instruction(0x05); //写一字符，整屏右移
//Write_Instruction(0x06); //写一字符，整屏显示不移动
//Write_Instruction(0x07); //写一字符，整屏左移
Delay_xms(5);
//Write_Instruction(0x0B); //关闭显示（不显示字符，只有背光亮）
Write_Instruction(0x0C); //开显示，光标、闪烁都关闭
//Write_Instruction(0x0D); //开显示，不显示光标，但光标闪烁
//Write_Instruction(0x0E); //开显示，显示光标，但光标不闪烁
//Write_Instruction(0x0F); //开显示，光标、闪烁均显示
}
//DS1302初始化函数
void ds1302_init(void)
{
RST=0; //RST脚置低
SCK=0; //SCK脚置低
}
//向DS1302写入一字节数据
void ds1302_write_byte(uchar addr, uchar d)
{
uchar i;
RST=1; //启动DS1302总线
//写入目标地址：addr
addr = addr & 0xFE; //最低位置零，寄存器0位为0时写，为1时读
for (i = 0; i < 8; i ++) {
if (addr & 0x01) {
IO=1;
}
else {
IO=0;
}
SCK=1; //产生时钟
SCK=0;
addr = addr >> 1;
}
//写入数据：d
for (i = 0; i < 8; i ++) {
if (d & 0x01) {
IO=1;
}
else {
IO=0;
}
SCK=1; //产生时钟
SCK=0;
d = d >> 1;
}
RST=0; //停止DS1302总线
}
//从DS1302读出一字节数据
uchar ds1302_read_byte(uchar addr) {
uchar i,temp;
RST=1; //启动DS1302总线
//写入目标地址：addr
addr = addr | 0x01; //最低位置高，寄存器0位为0时写，为1时读
for (i = 0; i < 8; i ++) {
if (addr & 0x01) {
IO=1;
}
else {
IO=0;
}
SCK=1;
SCK=0;
addr = addr >> 1;
}
//输出数据：temp
for (i = 0; i < 8; i ++) {
temp = temp >> 1;
if (IO) {
temp |= 0x80;
}
else {
temp &= 0x7F;
}
SCK=1;
SCK=0;
}
RST=0; //停止DS1302总线
return temp;
}
//向DS302写入时钟数据
void ds1302_write_time(void)
{
ds1302_write_byte(ds1302_control_add,0x00); //关闭写保护
ds1302_write_byte(ds1302_sec_add,0x80); //暂停时钟
//ds1302_write_byte(ds1302_charger_add,0xa9); //涓流充电
ds1302_write_byte(ds1302_year_add,time_buf[1]); //年
ds1302_write_byte(ds1302_month_add,time_buf[2]); //月
ds1302_write_byte(ds1302_date_add,time_buf[3]); //日
ds1302_write_byte(ds1302_hr_add,time_buf[4]); //时
ds1302_write_byte(ds1302_min_add,time_buf[5]); //分
ds1302_write_byte(ds1302_sec_add,time_buf[6]); //秒
ds1302_write_byte(ds1302_day_add,time_buf[7]); //周
ds1302_write_byte(ds1302_control_add,0x80); //打开写保护
}
//从DS302读出时钟数据
void ds1302_read_time(void)
{
time_buf[1]=ds1302_read_byte(ds1302_year_add); //年
time_buf[2]=ds1302_read_byte(ds1302_month_add); //月
time_buf[3]=ds1302_read_byte(ds1302_date_add); //日
time_buf[4]=ds1302_read_byte(ds1302_hr_add); //时
time_buf[5]=ds1302_read_byte(ds1302_min_add); //分
time_buf[6]=(ds1302_read_byte(ds1302_sec_add))&0x7f;//秒，屏蔽秒的第7位，避免超出59
time_buf[7]=ds1302_read_byte(ds1302_day_add); //周
}
void Display(void)
{
LCD_write_char(3,0,dis_time_buf[0]+'0');
LCD_write_char(4,0,dis_time_buf[1]+'0');
LCD_write_char(5,0,dis_time_buf[2]+'0');
LCD_write_char(6,0,dis_time_buf[3]+'0');
LCD_write_char(7,0,'/');
LCD_write_char(8,0,dis_time_buf[4]+'0');
LCD_write_char(9,0,dis_time_buf[5]+'0');
LCD_write_char(10,0,'/');
LCD_write_char(11,0,dis_time_buf[6]+'0');
LCD_write_char(12,0,dis_time_buf[7]+'0');
LCD_write_char(15,0,dis_time_buf[14]+'0');
//第2行显示
LCD_write_char(3,1,dis_time_buf[8]+'0');
LCD_write_char(4,1,dis_time_buf[9]+'0');
LCD_write_char(5,1,':');
LCD_write_char(6,1,dis_time_buf[10]+'0');
LCD_write_char(7,1,dis_time_buf[11]+'0');
LCD_write_char(8,1,':');
LCD_write_char(9,1,dis_time_buf[12]+'0');
LCD_write_char(10,1,dis_time_buf[13]+'0');
}
//定时器中断函数
void Timer2() interrupt 5 //定时器2是5号中断
{
static uchar t;
TF2=0;
t++;
if(t==4) //间隔200ms(50ms*4)读取一次时间
{
t=0;
ds1302_read_time(); //读取时间
dis_time_buf[0]=(time_buf[0]>>4); //年
dis_time_buf[1]=(time_buf[0]&0x0f);
dis_time_buf[2]=(time_buf[1]>>4);
dis_time_buf[3]=(time_buf[1]&0x0f);
dis_time_buf[4]=(time_buf[2]>>4); //月
dis_time_buf[5]=(time_buf[2]&0x0f);
dis_time_buf[6]=(time_buf[3]>>4); //日
dis_time_buf[7]=(time_buf[3]&0x0f);
dis_time_buf[14]=(time_buf[7]&0x07); //星期
//第2行显示
dis_time_buf[8]=(time_buf[4]>>4); //时
dis_time_buf[9]=(time_buf[4]&0x0f);
dis_time_buf[10]=(time_buf[5]>>4); //分
dis_time_buf[11]=(time_buf[5]&0x0f);
dis_time_buf[12]=(time_buf[6]>>4); //秒
dis_time_buf[13]=(time_buf[6]&0x0f);
}
}
//定时器2初始化
void Init_timer2(void)
{
RCAP2H=0x3c;//赋T2初始值0x3cb0，溢出20次为1秒,每次溢出时间为50ms
RCAP2L=0xb0;
TR2=1; //启动定时器2
ET2=1; //打开定时器2中断
EA=1; //打开总中断
}
//主函数
void main(void)
{
Delay_xms(50);//等待系统稳定
LCD_init(); //LCD初始化
LCD_clear(); //清屏
ds1302_init(); //DS1302初始化
Delay_xms(10);
ds1302_write_time(); //写入初始值
Init_timer2(); //定时器2初始化
while(1)
{
Display();
}
}
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