时钟—ds1302+数码管显示

ti

搞了好久，终于写好了，

//**** 功能说明：时钟+数码管显示*************************************//
//***  key1功能按键，按一次，进入调分模式（key2加，key3减，**********//
//***  按二次key1，进入调时模式（key2加，key3减，）******************//
//***  按三次key1，进入正常模式**************************************//
//***  同时开机蜂鸣器响一声，按键按下都响一声************************//
#include
#include
#define uint unsigned int
#define uchar unsigned char

***it SCK=P3^6;
***it SDA=P3^5;
***it RST=P3^7;
***it key1=P3^0; // 功能按键
***it key2=P3^1;//key2加，
***it key3=P3^2;//key3减，
***it SPK=P3^3; // 蜂鸣器
/*复位脚*/
#define RST_CLR RST=0/*电平置低*/
#define RST_SET RST=1/*电平置高*/

/*双向数据*/
#define IO_CLR SDA=0/*电平置低*/
#define IO_SET SDA=1/*电平置高*/
#define IO_R SDA/*电平读取*/

/*时钟信号*/
#define SCK_CLR SCK=0/*时钟信号*/
#define SCK_SET SCK=1/*电平置高*/

#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
bit flng=0; //anjian标志位
uchar wei[8]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};
uchar code tab[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xbf};// 显示段码值0-9和-
uchar time_buf1[8] = {20,9,3,13,18,51,00,6};//空年月日时分秒周
uchar time_buf[8] ;//空年月日时分秒周
uchar disp[8];
uchar com=0;
void adjust();                //调整后写入函数
void keyscan();                //按键函数
uchar spe_ak(uchar y,uchar x) ;  //蜂鸣器函数
void  delayus(uchar a)          //延迟
{
uchar i,j;
   for(i=0;i    for(j=0;j<110;j++);
}

/*向DS1302写入一字节数据*/
void ds1302_write_byte( uchar addr, uchar d) {
unsigned char i;
RST_SET;    /*启动DS1302总线*/

/*写入目标地址：addr*/
addr = addr & 0xFE;/*最低位置零*/
for (i = 0; i < 8; i ++) {

  if (addr & 0x01) {
IO_SET;
}
  else {
IO_CLR;
}
  SCK_SET;
  SCK_CLR;
  addr = addr >> 1;
  }

/*写入数据：d*/
for (i = 0; i < 8; i ++) {

  if (d & 0x01) {
IO_SET;
}
  else {
IO_CLR;
}
  SCK_SET;
  SCK_CLR;
  d = d >> 1;
  }
RST_CLR;    /*停止DS1302总线*/
}
/*从DS1302读出一字节数据*/
uchar ds1302_read_byte(uchar addr) {
unsigned char i;
unsigned char temp;
RST_SET;    /*启动DS1302总线*/
/*写入目标地址：addr*/
addr = addr | 0x01;/*最低位置高*/
for (i = 0; i < 8; i ++) {

  if (addr & 0x01) {
IO_SET;
}
  else {
IO_CLR;
}
  SCK_SET;
  SCK_CLR;
  addr = addr >> 1;
  }

/*输出数据：temp*/
for (i = 0; i < 8; i ++) {
  temp = temp >> 1;
  if (IO_R) {
temp |= 0x80;
}
  else {
temp &= 0x7F;
}
  SCK_SET;
  SCK_CLR;
  }

RST_CLR;    /*停止DS1302总线*/
return temp;
}
/*向DS302写入时钟数据*/
void ds1302_write_time(void) {

unsigned char i,tmp;
for(i=0;i<8;i++){          //BCD处理
  tmp=time_buf1[i]/10;
  time_buf[i]=time_buf1[i]%10;
  time_buf[i]=time_buf[i]+tmp*16;
}
ds1302_write_byte(ds1302_control_add,0x00); //关闭写保护
ds1302_write_byte(ds1302_sec_add,0x80); //暂停
//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_day_add,time_buf[7]);  //周
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()
{
   unsigned char i,tmp;
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
time_buf[7]=ds1302_read_byte(ds1302_day_add);  //周


for(i=0;i<8;i++)
   {          //BCD处理
  tmp=time_buf[i]/16;
  time_buf1[i]=time_buf[i]%16;
  time_buf1[i]=time_buf1[i]+tmp*10;

}


}
/*DS302初始化函数*/
void ds1302_init(void) {

RST_CLR; /*RST脚置低*/
SCK_CLR; /*SCK脚置低*/
ds1302_write_byte(ds1302_sec_add,0x00);
}
uchar spe_ak(uchar y,uchar x)       //y声音持续时间，x 发声的频率
{  uint i;
   for(i=0;i          {
         delayus(x);    //参数决定发声的频率，估算值，可以自行更改参数并
         SPK=!SPK;
         }
         SPK=1;          //喇叭停止工作，间歇的时间，可更改
         delayus(x);
   return 0 ;
}


void display()                      //显示函数
{
   uchar i;
//  P1=0x01;
   disp[0]=time_buf1[4]/10;
   disp[1]=time_buf1[4]%10;
   disp[2]=10;
   disp[3]=time_buf1[5]/10;
   disp[4]=time_buf1[5]%10;
   disp[5]=10;
   disp[6]=time_buf1[6]/10;
   disp[7]=time_buf1[6]%10;

   for(i=0;i<8;i++)
   {
      P1=wei[i];
      P2=tab[disp[i]];
      delayus(5);
   }
   delayus(1);
}
void timer0() interrupt 1             //定时器0
{
TH0=(65635-50000)/256;
TL0=(65635-50000)%256;
if(key1==0)
   {
   delayus(20);
   if(key1==0)
      { TR0=0;
            spe_ak(250,1);
            flng=1;
         com++;
         if(com==3)
         com=0;
      }
   while(!key1) ; //等待按起
   TR0=1;
}

}
void keyscan()                      //按键函数
  {
   switch(com)
{
   case 0: { // adjust();
                  flng=0;
               }
      break;
   case 1:{
            ds1302_write_byte(ds1302_sec_add,0x80); //暂停
            if(key2==0)
               { delayus(20);
               if(key2==0)
                  {  spe_ak(250,1);
                  time_buf[5]=(++time_buf1[5])%60;  //加分
               if(time_buf1[5]==60)
                  { time_buf1[5]=0;  }

                  }
               while(!key2); //等待按起
               }
               if(key3==0)
               { delayus(20);
               if(key3==0)
                  {  spe_ak(250,1);
                  time_buf1[5]=(--time_buf1[5])%60;  //减分
               if(time_buf1[5]==0)
                  { time_buf1[5]=59;  }

                  }
               while(!key3); //等待按起
               }
            ds1302_write_byte(ds1302_sec_add,0x00); //结束暂停
            }
      break;
   case 2:{ ds1302_write_byte(ds1302_sec_add,0x80); //暂停
               if(key2==0)
               { delayus(20);
               if(key2==0)
                  { spe_ak(250,1);
                  time_buf1[4]=(++time_buf1[4])%24;  //加时
                  if(time_buf1[4]==23)
                  { time_buf1[4]=0;  }
                  }
               while(!key2); //等待按起
               }

               if(key3==0)
               { delayus(20);
               if(key3==0)
                  {  spe_ak(250,1);
                  time_buf[4]=(--time_buf1[4])%24;  //减时
                  if(time_buf1[4]==0)
                  { time_buf1[4]=23;  }
                  }
               while(!key3); //等待按起
               }
               ds1302_write_byte(ds1302_sec_add,0x00); //结束暂停
            }
      break;

}
   adjust();
}
void adjust()//时钟调节
{
ds1302_write_byte(ds1302_control_add,0x00); //关闭写保护
ds1302_write_byte(ds1302_hr_add,(time_buf1[4]/10<<4)|(time_buf1[4]%10));  //时
ds1302_write_byte(ds1302_min_add,(time_buf1[5]/10<<4)|(time_buf1[5]%10));  //分
  ds1302_write_byte(ds1302_control_add,0x80); //打开写保护
}
void timer_init() //定时器初始化
{
  IE=0X82;
TMOD=0X01;
TH0=(65635-50000)/256;
TL0=(65635-50000)%256;
TR0=1;
}

main()
{
P0=0XFF;
spe_ak(250,1);
timer_init();//定时器初始化
ds1302_init();


   ds1302_write_time();


while(1)
{ if(flng==1)
      {
      keyscan();
         delayus(2);
         ds1302_read_time();
      display();
      }
else
      { ds1302_read_time();
         delayus(2);
      display();  }

}

}

说明：只显示时、分、秒，其他（年，月...）的已读出，自己修改，
仿真已通过