使用DS1302的时钟单片机程序 Lcd1602液晶显示

helendcany · 发表于 2019-1-19 09:50

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使用DS1302的时钟单片机程序 Lcd1602液晶显示
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51单片机源程序：
#include<reg52.h>

struct sTime{  //日期时间结构体申明
      unsigned int year;
      unsigned char mon;
      unsigned char day;
      unsigned char hour;
      unsigned char min;
      unsigned char sec;
      unsigned char week;
};

bit flag200ms = 1;       //200ms 定时标志
struct sTime bufTime; //日期时间缓冲区
unsigned char setIndex = 0;       //时间设置索引 0 0 就表示正常运行，
unsigned char T0RH, T0RL;

void RefreshTimeShow();
void ConfigTimer0(unsigned int ms);
extern void KeyScan();
extern void KeyDriver();
extern void InitLcd1602();
extern void LcdOpenCursor();
extern void LcdCloseCursor();
extern void LcdSetCursor(unsigned char x, unsigned char y);
extern void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str);
extern void InitDS1302();
extern void SetRealTime(struct sTime *time);
extern void GetRealTime(struct sTime *time);

void main()
{
      unsigned char psec = 0xaa;       //秒备份，初值 AA 确保首次读取时间后刷新显示

      EA = 1;
      ConfigTimer0(1);
      InitLcd1602();
      InitDS1302();
      LcdShowStr(0, 0, "20  -  - Week "); //初始化屏幕上固定不变的内容
      LcdShowStr(4, 1, "  :  :  ");

      while(1)
      {
            KeyDriver();       //调用按键驱动
            if(flag200ms && (setIndex == 0))
            {
                     flag200ms = 0;                               //每隔200ms且未处于设置状态时，
                     GetRealTime(&bufTime);          //获取当前时间
                     if(psec != bufTime.sec)                //检测到时间有变化时刷新显示
                     {
                              RefreshTimeShow();
                              psec = bufTime.sec;             //用当前值更新上次秒数
                     }
            }
      }
}
/* 将一个BCD码字节显示到屏幕上，(x,y)-屏幕起始坐标，bcd-待显示BCD码 */
void ShowBCDByte(unsigned char x, unsigned char y, unsigned char bcd)
{
      unsigned char str[4];

      str[0] = (bcd >> 4) + '0';
      str[1] = (bcd & 0x0f) + '0';
      str[2] = '\0';
      LcdShowStr(x, y, str);
}

void ShowBCDWeek(unsigned char x, unsigned char y, unsigned char bcd)
{
      unsigned char str[3];

      str[0] = (bcd & 0x0f) + '0';
      str[1] = '\0';
      LcdShowStr(x, y, str);
}
/* 刷新日期时间的显示       */
void RefreshTimeShow()
{
      ShowBCDByte(2, 0, bufTime.year);
      ShowBCDByte(5, 0, bufTime.mon);
      ShowBCDByte(8, 0, bufTime.day);
      ShowBCDByte(4, 1, bufTime.hour);
      ShowBCDByte(7, 1, bufTime.min);
      ShowBCDByte(10, 1, bufTime.sec);
      ShowBCDWeek(15, 0, bufTime.week);
}
/* 刷新当前设置位的光标指示 */
void RefreshSetCursorShow()
{
      switch(setIndex)
      {
            case 1: LcdSetCursor(2, 0); break;
            case 2: LcdSetCursor(3, 0); break;
            case 3: LcdSetCursor(5, 0); break;
            case 4: LcdSetCursor(6, 0); break;
            case 5: LcdSetCursor(8, 0); break;
            case 6: LcdSetCursor(9, 0); break;
            case 7: LcdSetCursor(4, 1); break;
            case 8: LcdSetCursor(5, 1); break;
            case 9: LcdSetCursor(7, 1); break;
            case 10: LcdSetCursor(8, 1); break;
            case 11: LcdSetCursor(15, 0); break;
            default: break;
      }
}

unsigned char DecrBCDHight(unsigned char bcd)
{

      if((bcd & 0xf0) > 0x00)
      {
            bcd -= 0x10;
      }
      else
      {
            if(setIndex == 1)
                     bcd       |= 0x90;
            else if(setIndex == 3)
                     bcd |= 0x10;
            else if(setIndex == 5)
                     bcd |= 0x30;
            else if(setIndex == 7)
                     bcd |= 0x20;
            else if((setIndex == 9))
                     bcd |= 0x60;
      }

      return bcd;
}

unsigned char DecrBCDLow(unsigned char bcd)
{

      if((bcd & 0x0f) > 0x00)
      {
            bcd -= 0x01;
      }
      else if(setIndex == 11)
      {
            bcd |= 0x07;
      }
      else
      {
            bcd       |= 0x09;
      }

      return bcd;
}

unsigned char IncrBCDHight(unsigned char bcd)
{
      if((setIndex == 1)&&((bcd & 0xf0)< 0x90))
      {
                     bcd += 0x10;
      }
      else if((setIndex == 3)&&(bcd < 0x10))
      {
                     bcd +=0x10;
      }
      else if((setIndex == 5)&&(bcd < 0x30))
      {
                     bcd += 0x10;
      }
      else if((setIndex == 7)&&(bcd < 0x20))
      {
                     bcd += 0x10;
      }
      else if(setIndex == 9)
      {
                     bcd += 0x10;
      }
      else if(setIndex == 11)
      {
            if(bcd < 0x07)
            {
                     bcd++;
            }
            else
            {
                     bcd = 0x01;
            }
      }
      else
      {
            bcd       &= 0x0f;
      }

      return bcd;
}

unsigned char IncrBCDLow(unsigned char bcd)
{
if(setIndex != 11)
      {
            if ((bcd&0x0F) < 0x09)
            bcd += 0x01;
         else
            bcd &= 0xF0;
      }
      else
      {
            if ((bcd&0x0F) < 0x07)
            bcd += 0x01;
         else
            bcd &= 0x01;
      }

return bcd;
}
/* 递增当前设置位的值       */
void IncrSetTime()
{
      switch(setIndex)
      {
            case 1: bufTime.year = IncrBCDHight(bufTime.year); break;
            case 2: bufTime.year = IncrBCDLow(bufTime.year); break;
            case 3:       bufTime.mon = IncrBCDHight(bufTime.mon); break;
            case 4:       bufTime.mon = IncrBCDLow(bufTime.mon); break;
            case 5: bufTime.day = IncrBCDHight(bufTime.day); break;
            case 6:       bufTime.day = IncrBCDLow(bufTime.day); break;
            case 7: bufTime.hour = IncrBCDHight(bufTime.hour); break;
            case 8:       bufTime.hour = IncrBCDLow(bufTime.hour); break;
            case 9: bufTime.min = IncrBCDHight(bufTime.min); break;
            case 10: bufTime.min = IncrBCDLow(bufTime.min); break;
            case 11: bufTime.week = IncrBCDLow(bufTime.week); break;
            default: break;
      }
      RefreshTimeShow();
      RefreshSetCursorShow();
}
/* 递减当前设置位的值          */
void DecrSetTime()
{
      switch(setIndex)
      {
            case 1: bufTime.year = DecrBCDHight(bufTime.year); break;
            case 2: bufTime.year = DecrBCDLow(bufTime.year); break;
            case 3:       bufTime.mon = DecrBCDHight(bufTime.mon); break;
            case 4:       bufTime.mon = DecrBCDLow(bufTime.mon); break;
            case 5: bufTime.day = DecrBCDHight(bufTime.day); break;
            case 6:       bufTime.day = DecrBCDLow(bufTime.day); break;
            case 7: bufTime.hour = DecrBCDHight(bufTime.hour); break;
            case 8:       bufTime.hour = DecrBCDLow(bufTime.hour); break;
            case 9: bufTime.min = DecrBCDHight(bufTime.min); break;
            case 10: bufTime.min = DecrBCDLow(bufTime.min); break;
            case 11: bufTime.week = DecrBCDLow(bufTime.week); break;
            default: break;
      }
      RefreshTimeShow();
      RefreshSetCursorShow();
}
/* 左移设置位       */
void LeftShiftTimeSet()
{
      if(setIndex != 0)
      {
            if(setIndex > 1)
                     setIndex--;
            else
                     setIndex = 11;
            RefreshSetCursorShow();
      }
}
/* 右移设置位          */
void RightShifTimeSet()
{
      if(setIndex != 0)
      {
            if(setIndex < 11)
                     setIndex++;
            else
                     setIndex = 1;
            RefreshSetCursorShow();
      }
}
/* 进入设置状态       */
void EnterTimeSet()
{
      setIndex = 2;       //把设置索引设置为2，即可进入设置状态
      LeftShiftTimeSet(); //再利用现成的左移操作移到位置1并完成显示刷新
      LcdOpenCursor(); //打开光标闪烁效果
}
/* 退出设置状态，save-是否保存当前设置的时间值       */
void ExitTimeSet(bit save) //save = 1 保存，save = 0 不保存
{
      setIndex = 0;          //把设置索引设置为0，即可退出设置状态
      if(save)                //需保存时即把当前设置时间写入DS1302
            SetRealTime(&bufTime);
      LcdCloseCursor();       //关闭光标显示
}
/* 按键动作函数，根据键码执行相应的操作，keycode-按键键码 */
void KeyAction(unsigned char keycode)
{
      if((keycode >= '0')&&(keycode <= '9'))//不响应字符键
      {}
      else if((keycode == 0x26)) //向上键，递增当前设置位的值
      {
            IncrSetTime();
      }
      else if(keycode == 0x28)       //向下键，递减当前设置位的值
      {
            DecrSetTime();
      }
      else if(keycode == 0x25)       //向左键，向左切换设置位
      {
            LeftShiftTimeSet();
      }
      else if(keycode == 0x27) //向右键，向右切换设置位
      {
            RightShifTimeSet();
      }
      else if(keycode == 0x0d)  //回车键，进入设置模式/启用当前设置值
      {
            if(setIndex == 0)       //不处于设置状态时，进入设置状态
            {
                     EnterTimeSet();
            }
            else                      //已处于设置状态时，保存时间并退出设置状态
            {
                     ExitTimeSet(1);
            }
      }
      else if(keycode == 0x1b) //Esc键，取消当前设置
      {
            ExitTimeSet(0);
      }
}

void ConfigTimer0(unsigned int ms)
{
      unsigned long tmp;

      tmp = 11059200 / 12;
      tmp = tmp * ms / 1000;
      tmp = 65536 - tmp;
      tmp = tmp + 28;
      T0RH = (unsigned char)(tmp >> 8);
      T0RL = (unsigned char)tmp;
      TMOD = (TMOD & 0xf0)|0x01;
      TH0 = T0RH;
      TL0 = T0RL;
      ET0 = 1;
      TR0 = 1;
}

void IntTimer0() interrupt 1
{
      static unsigned char tmr200ms = 0;

      TH0 = T0RH;
      TL0 = T0RL;

      KeyScan();
      tmr200ms++;
      if(tmr200ms >= 200)
      {
            tmr200ms = 0;
            flag200ms = 1;
      }
}

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sunygd · 发表于 2019-1-21 14:39

不错，看看楼主是怎么弄的

小窗子 · 发表于 2019-12-7 17:06

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