数字电子钟毕业设计源程序（加万年历和闹钟功能）

ID:80332 · 发表于 2015-5-18 10:15

/*
*  Desc:DS12C887 6位数码管显示
*
*/
#include <AT89X51.h>

#define SEG_DAT P0
#define SEG_BIT P2
#define DS_DAT  P0
#define DS_SEC  0x00
#define DS_MIN  0x02
#define DS_HOR  0x04
#define DS_WEK  0x06
#define DS_DAY  0x07
#define DS_MON  0x08
#define DS_YER  0x09
#define DS_R_A  0x0A
#define DS_R_B  0x0B
#define DS_R_C  0x0C
#define DS_R_D  0x0D
#define DS_Y_S  0x0E //年千百位

#define CNT_M 30    //控制闪烁速度,为偶数

#define BCD_DEC(X)  (((X & 0xF0) >> 4) * 10 + (X & 0x0F))
#define DEC_BCD(X)  (((X / 10) << 4) | (X % 10))

sbit DS_DS = P3^0;
sbit DS_RW = P3^1;
sbit DS_AS = P3^2;
sbit DS_CS = P3^3;

sbit KEY1  = P1^0;
sbit KEY2  = P1^1;
sbit KEY3  = P1^2;
sbit KEY4  = P1^3;

unsigned char dispMode = 0; //显示模式
unsigned char modify = 0; //修改模式
unsigned char count = 0; //修改模式下闪烁计数
unsigned char DIS[6];

unsigned char code C_DAT[]={
0xC0,/*0*/
0xF9,/*1*/
0xA4,/*2*/
0xB0,/*3*/
0x99,/*4*/
0x92,/*5*/
0x82,/*6*/
0xF8,/*7*/
0x80,/*8*/
0x90,/*9*/
0xBF,/*-*/
};
unsigned char code C_BIT[]={0xDF,0xEF,0xF7,0xFB,0xFD,0xFE};

void Delay(unsigned int t)
{
unsigned int a,b;
for (a=0; a<t; a++)
      for (b=0; b<123; b++)
         ;
}

void DS12887_Write(unsigned char addres,unsigned char dat)
{
DS_AS = 1;
DS_DS = 1;
DS_RW = 1;
DS_CS = 0;
DS_DAT = addres;
DS_AS = 0;  //add will be write when AS full down
DS_RW = 0;
DS_DAT = dat;
DS_RW = 1;
DS_AS = 1;
DS_CS = 1;
}

unsigned char DS12887_Read(unsigned char addres)
{
unsigned char d;
DS_AS = 1;
DS_DS = 1;
DS_RW = 1;
DS_CS = 0;
DS_DAT = addres;
DS_AS = 0;
DS_DS = 0;
DS_DAT = 0xFF;
d = DS_DAT;
DS_DS = 1;
DS_AS = 1;
DS_CS = 1;
return d;
}

void DS12887_Init(void)
{
if (DS12887_Read(DS_Y_S) == 0)
{
      DS12887_Write(DS_Y_S, 0x20);
      DS12887_Write(DS_HOR, 0x12);
      DS12887_Write(DS_R_A, 0x20);
      DS12887_Write(DS_R_B, 0x02);  //BCD
}
}

void Display(void)
{
unsigned char i;

if (dispMode == 0)                         //显示模式0，时分秒
{
      i = DS12887_Read(DS_HOR) & 0x7F;
      DIS[0] = C_DAT[i >> 4];
      DIS[1] = C_DAT[i & 0x0F] & 0x7F;
      i = DS12887_Read(DS_MIN);
      DIS[2] = C_DAT[i >> 4];
      DIS[3] = C_DAT[i & 0x0F] & 0x7F;
      i = DS12887_Read(DS_SEC);
      DIS[4] = C_DAT[i >> 4];
      DIS[5] = C_DAT[i & 0x0F] & 0x7F;
      if (modify != 0 && count > CNT_M) //修改模式123下闪烁
      {
         DIS[2 * (modify - 1)] = 0xFF;
         DIS[2 * (modify - 1) + 1] = 0xFF;
      }
} else if (dispMode == 1)                //显示模式1，年
{
      DIS[0] = 0xFF;
      i = DS12887_Read(DS_Y_S);             //年高两位，在RAM里0x0E
      DIS[1] = C_DAT[i >> 4];
      DIS[2] = C_DAT[i & 0x0F];
      i = DS12887_Read(DS_YER);             //年低两位
      DIS[3] = C_DAT[i >> 4];
      DIS[4] = C_DAT[i & 0x0F];
      DIS[5] = 0xFF;
      if (modify != 0 && count > CNT_M) //修改模式45下闪烁
      {
         DIS[2 * (modify - 4) + 1] = 0xFF;
         DIS[2 * (modify - 4) + 2] = 0xFF;
      }
} else if (dispMode == 2)                //显示模式2，月日星期
{
      i = DS12887_Read(DS_MON);             //月
      if (i < 10)
         DIS[0] = 0xFF;
      else
         DIS[0] = C_DAT[i >> 4];
      DIS[1] = C_DAT[i & 0x0F] & 0x7F;       //显示小数点
      i = DS12887_Read(DS_DAY);             //日
      DIS[2] = C_DAT[i >> 4];
      DIS[3] = C_DAT[i & 0x0F];
      i = DS12887_Read(DS_WEK);             //星期
      DIS[4] = C_DAT[10];                   //用'-'隔开
      DIS[5] = C_DAT[(i - 1) & 0x0F];       //1～7，第一天是星期天
      if (modify != 0 && count > CNT_M) //修改模式789下闪烁
      {
         if (modify != 9)                   //星期修改时，‘-’不闪烁
            DIS[2 * (modify - 7)] = 0xFF;
         DIS[2 * (modify - 7) + 1] = 0xFF;
      }
}
for (i=0; i<6; i++)
{
      SEG_DAT = DIS[ i];
      SEG_BIT = C_BIT[ i];
      Delay(1);
      SEG_BIT = 0xFF;
}
      count++;                      //用于修改模式下闪烁
      if (count > 2 * CNT_M)
            count = 0;
}
/*计算当月的天数*/
unsigned char getDay(void)
{
unsigned char tYear,tMonth;
tYear = BCD_DEC(DS12887_Read(DS_YER));  //当前年
tMonth = BCD_DEC(DS12887_Read(DS_MON));//当前月
switch (tMonth)
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:return 31;  //1、3、5、7、8、10、12 月均为31天
case 4:
case 6:
case 9:
case 11:return 30;  //4、6、9、11 月均为30天
case 2:
      if (tYear%4==0) //2月闰年为29天
         return 29;
      else
         return 28;  //平年为28天
default: return 0;
}
}
void Key(void)
{
unsigned char i;
P1 = 0xFF;
if (KEY1 == 0)                         //显示模式更改
{
      Delay(10);
      if (KEY1 == 0)
      {
                     if (modify)                                                       //修改模式下用于退出修改
                              modify = 0;
                     else {
                              DS12887_Write(DS_R_B, 0x62);
                              dispMode++;
                              if (dispMode > 2)
                                    dispMode = 0;
                     }
      }
      while (KEY1 == 0)
         Display();
}
if (KEY2 == 0)                                     //修改模式
{
      Delay(10);
      if (KEY2 == 0)
      {
         if (modify == 0)          //时分秒123,年45,月日星期789
         {
            modify = 3 * dispMode + 1;
            DS12887_Write(DS_R_B, 0xE2);
         } else {
            modify++;
            switch (dispMode)    //根据显示模式确定modify初值
            {
            case 0:
            case 2:
                  if (modify > (3 * dispMode + 3))
//时分秒，日星期模式下每个是3位
                  {
                     modify = 0;
                     DS12887_Write(DS_R_B, 0x62);
                  }
                  break;
            case 1:
                  if (modify > (3 * dispMode + 2)) //年模式下是2位
                  {
                     modify = 0;
                     DS12887_Write(DS_R_B, 0x62);
                  }
                  break;
            }
         }
      }
      while (KEY2 == 0)
         Display();
}
if (KEY3 == 0)                                     //+
{
      Delay(10);
      if (KEY3 == 0)
      {
         switch (modify)
         {
         case 1:                                  //时
            i = BCD_DEC(DS12887_Read(DS_HOR));
            i++;
            if (i > 23)
                  i = 0;
            DS12887_Write(DS_HOR, DEC_BCD(i));
            break;
         case 2:                                  //分
            i = BCD_DEC(DS12887_Read(DS_MIN));
            i++;
            if (i > 59)
                  i = 0;
            DS12887_Write(DS_MIN, DEC_BCD(i));
            break;
         case 3:                                  //秒
            i = BCD_DEC(DS12887_Read(DS_SEC));
            i++;
            if (i > 59)
                  i = 0;
            DS12887_Write(DS_SEC, DEC_BCD(i));
            break;
         case 4:                                  //年高两位
            i = BCD_DEC(DS12887_Read(DS_Y_S));
            i++;
            if (i > 21)
                  i = 19;
            DS12887_Write(DS_Y_S, DEC_BCD(i));
            break;
         case 5:                                  //年低两位
            i = BCD_DEC(DS12887_Read(DS_YER));
            i++;
            if (i > 99)
                  i = 0;
            DS12887_Write(DS_YER, DEC_BCD(i));
            break;
         case 7:                                  //月
            i = BCD_DEC(DS12887_Read(DS_MON));
            i++;
            if (i > 12)
                  i = 1;
            DS12887_Write(DS_MON, DEC_BCD(i));
            break;
         case 8:                                  //日
            i = BCD_DEC(DS12887_Read(DS_DAY));
            i++;
            if (i > getDay())
                  i = 1;
            DS12887_Write(DS_DAY, DEC_BCD(i));
            break;
         case 9:                                  //星期
            i = BCD_DEC(DS12887_Read(DS_WEK));
            i++;
            if (i > 7)
                  i = 1;
            DS12887_Write(DS_WEK, DEC_BCD(i));
            break;
         }
      }
      while (KEY3 == 0)
         Display();
}
if (KEY4 == 0)
{
      Delay(10);
      if (KEY4 == 0)
      {
         switch (modify)
         {
         case 1:                                  //时
            i = BCD_DEC(DS12887_Read(DS_HOR));
            if (i == 0)
                  i = 24;
            i--;
            DS12887_Write(DS_HOR, DEC_BCD(i));
            break;
         case 2:                                  //分
            i = BCD_DEC(DS12887_Read(DS_MIN));
            if (i == 0)
                  i = 60;
            i--;
            DS12887_Write(DS_MIN, DEC_BCD(i));
            break;
         case 3:                                  //秒
            i = BCD_DEC(DS12887_Read(DS_SEC));
            if (i == 0)
                  i = 60;
            i--;
            DS12887_Write(DS_SEC, DEC_BCD(i));
            break;
         case 4:                                  //年高两位
            i = BCD_DEC(DS12887_Read(DS_Y_S));
            if (i == 19)
                  i = 22;
            i--;
            DS12887_Write(DS_Y_S, DEC_BCD(i));
            break;
         case 5:                                  //年低两位
            i = BCD_DEC(DS12887_Read(DS_YER));
            if (i == 0)
                  i = 99;
            else
                  i--;
            DS12887_Write(DS_YER, DEC_BCD(i));
            break;
         case 7:                                  //月
            i = BCD_DEC(DS12887_Read(DS_MON));
            if (i == 1)
                  i = 12;
            else
                  i--;
            DS12887_Write(DS_MON, DEC_BCD(i));
            break;
         case 8:                                  //日
            i = BCD_DEC(DS12887_Read(DS_DAY));
            if (i == 1)
                  i = getDay();
            else
                  i--;
            DS12887_Write(DS_DAY, DEC_BCD(i));
            break;
         case 9:                                  //星期
            i = BCD_DEC(DS12887_Read(DS_WEK));
            if (i == 1)
                  i = 7;
            else
                  i--;
            DS12887_Write(DS_WEK, DEC_BCD(i));
            break;
         }
      }
      while (KEY4 == 0)
         Display();
}
}
void main (void)
{
unsigned char i;
DS12887_Init();
while (1)
{
      Key();
      Display();
}
}