可调闹钟lcd时钟

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#include<reg52.h> //包含头文件，一般情况不需要改动，头文件包含特殊功能寄存器的定义#include<intrins.h>#include "i2c.h"//sbit LATCH1=P2^2;    //定义锁存使能端口 段锁存//sbit LATCH2=P2^3;    //位锁存sbit RS = P2^4;      //定义端口 sbit RW = P2^5;sbit EN = P2^6;sbit SPK = P2^7;#define RS_CLR RS=0 #define RS_SET RS=1#define RW_CLR RW=0 #define RW_SET RW=1 #define EN_CLR EN=0#define EN_SET EN=1#define DataPort P0 //定义数据端口 程序中遇到DataPort 则用P0 替换#define KeyPort  P1bit KeyPressFlag;//定义按键标志位unsigned char sec;unsigned char min;unsigned char hour;unsigned char second;unsigned char minute;unsigned char hours;unsigned char dat[3] = 0;/*------------------------------------------------ uS延时函数------------------------------------------------*/void DelayUs2x(unsigned char t){    while(--t);}/*------------------------------------------------ mS延时函数------------------------------------------------*/void DelayMs(unsigned char t){ while(t--) {     //大致延时1mS     DelayUs2x(245);     DelayUs2x(245); }}/*------------------------------------------------           外部中断0初始化------------------------------------------------*/void Init_INT0(void){  EA=1;          //全局中断开  EX0=1;         //外部中断0开  IT0=1;         //边沿触发}/*------------------------------------------------                 外部中断0程序------------------------------------------------*/void ISR_INT0(void) interrupt 0 { KeyPressFlag=1;   //表明按键有动作，可以进行按键扫描}/*------------------------------------------------        按键扫描函数，返回扫描键值------------------------------------------------*/unsigned char KeyScan(void)  //键盘扫描函数，使用行列逐级扫描法{ unsigned char Val; KeyPort=0xf0;//高四位置高，低四位拉低 if(KeyPort!=0xf0)//表示有按键按下   {    DelayMs(10);  //去抖    if(KeyPort!=0xf0)      {           //表示有按键按下        KeyPort=0xfe; //检测第一行        if(KeyPort!=0xfe)            {              Val=KeyPort&0xf0;              Val+=0x0e;              while(KeyPort!=0xfe);              DelayMs(10); //去抖              while(KeyPort!=0xfe);              return Val;            }        KeyPort=0xfd; //检测第二行        if(KeyPort!=0xfd)            {              Val=KeyPort&0xf0;              Val+=0x0d;              while(KeyPort!=0xfd);              DelayMs(10); //去抖              while(KeyPort!=0xfd);              return Val;            }        KeyPort=0xfb; //检测第三行        if(KeyPort!=0xfb)            {              Val=KeyPort&0xf0;              Val+=0x0b;              while(KeyPort!=0xfb);              DelayMs(10); //去抖              while(KeyPort!=0xfb);              return Val;            }        KeyPort=0xf7; //检测第四行        if(KeyPort!=0xf7)            {              Val=KeyPort&0xf0;              Val+=0x07;              while(KeyPort!=0xf7);              DelayMs(10); //去抖              while(KeyPort!=0xf7);              return Val;            }     }   }  return 0xff;}/*------------------------------------------------         按键值处理函数，返回扫键值------------------------------------------------*/unsigned char KeyPro(void){ switch(KeyScan()) {  case 0x7e:  {      sec++;      if(sec == 60)      {          sec = 0;      }      break;  }  case 0x7d:  {      min++;      if(min == 60)      {           min = 0;      }      break;  }  case 0x7b:  {      hour++;      if(hour == 24)      {          hour =0 ;      }      break;  }  case 0x77:  {      second++;      if(second == 60)      {           second = 0;      }      break;  }  case 0xbe:  {      minute++;      if(minute == 60)      {           minute = 0;      }      break;  }  case 0xbd:  {      hours++;      if(hours == 24)      {          hours = 0;      }      break;  } /* case 0xbb:;break;//6  case 0xb7:return 7;break;//7  case 0xde:return 8;break;//8  case 0xdd:return 9;break;//9  case 0xdb:return 10;break;//a  case 0xd7:return 11;break;//b  case 0xee:return 12;break;//c  case 0xed:return 13;break;//d  case 0xeb:return 14;break;//e  case 0xe7:return 15;break;//f*/  default:return 0xff;break; }}/*------------------------------------------------              判忙函数------------------------------------------------*/ bit LCD_Check_Busy(void)  {  DataPort= 0xFF;  RS_CLR;  RW_SET;  EN_CLR;  _nop_();  EN_SET; return (bit)(DataPort & 0x80); }/*------------------------------------------------              写入命令函数------------------------------------------------*/ void LCD_Write_Com(unsigned char com)  {  // while(LCD_Check_Busy()); //忙则等待 DelayMs(5); RS_CLR;  RW_CLR;  EN_SET;  DataPort= com;  _nop_();  EN_CLR; }/*------------------------------------------------              写入数据函数------------------------------------------------*/ void LCD_Write_Data(unsigned char Data)  {  //while(LCD_Check_Busy()); //忙则等待 DelayMs(5); RS_SET;  RW_CLR;  EN_SET;  DataPort= Data;  _nop_(); EN_CLR; }/*------------------------------------------------                清屏函数------------------------------------------------*/ void LCD_Clear(void)  {  LCD_Write_Com(0x01);  DelayMs(5); }/*------------------------------------------------              写入字符串函数------------------------------------------------*/ void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s)  {      if (y == 0)     {          LCD_Write_Com(0x80 + x);     //表示第一行    } else     {          LCD_Write_Com(0xC0 + x);      //表示第二行    }         while (*s)     {      LCD_Write_Data( *s);      s ++;         } }/*------------------------------------------------              写入字符函数------------------------------------------------*/ void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data)  {      if (y == 0)     {         LCD_Write_Com(0x80 + x);         }     else     {         LCD_Write_Com(0xC0 + x);         }         LCD_Write_Data( Data);   }/*------------------------------------------------              初始化函数------------------------------------------------*/ void LCD_Init(void)  {   LCD_Write_Com(0x38);    /*显示模式设置*/    DelayMs(5);    LCD_Write_Com(0x38);    DelayMs(5);    LCD_Write_Com(0x38);    DelayMs(5);    LCD_Write_Com(0x38);     LCD_Write_Com(0x08);    /*显示关闭*/    LCD_Write_Com(0x01);    /*显示清屏*/    LCD_Write_Com(0x06);    /*显示光标移动设置*/    DelayMs(5);    LCD_Write_Com(0x0C);    /*显示开及光标设置*/   }void ISR_time0() interrupt 1{    unsigned char i;    EA = 0;    TMOD = 0x01;    TH0 = 0x3c;    TL0 = 0xb0;    i++;    if(i == 20)    {         i = 0;         sec++;    }        EA = 1;     }void time_add(){        if(sec == 60)        {            sec = 0;            min++;        }        if(min == 60)        {            min = 0;            hour++;        }        if(hour == 24)        {            hour = 0;        }        if(sec == second && min == minute && hour == hours)        {            SPK = !SPK;            DelayMs(5);        }}/*------------------------------------------------                    主函数------------------------------------------------*/ void main(void) {     IRcvStr(0xae,80,dat,16);     sec = dat[0];    min = dat[1];    hour = dat[2];    TMOD = 0x01;     TH0 = 0x3c;    TL0 = 0xb0;    TR0 = 1;    EA = 1;    ET0 = 1;    Init_INT0();    LCD_Init();     LCD_Clear();//清屏    DelayMs(5);    while (1)     {          time_add();        KeyPort=0xf0;  // 赋值用于中断检测        if(KeyPressFlag==1)        {            KeyPressFlag=0;  //按键标志清零，以便下次检测            KeyPro();        }        LCD_Write_Char(7,0,'0' + sec%10);           LCD_Write_Char(6,0,'0' + sec/10);        dat[0] = sec;        LCD_Write_Char(5,0,0x3a);        LCD_Write_Char(4,0,'0' + min%10);           LCD_Write_Char(3,0,'0' + min/10);        dat[1] = min;        LCD_Write_Char(2,0,0x3a);        LCD_Write_Char(1,0,'0' + hour%10);          LCD_Write_Char(0,0,'0' + hour/10);        dat[2] = hour;        LCD_Write_Char(0,1,'a');        LCD_Write_Char(1,1,'l');        LCD_Write_Char(2,1,'a');        LCD_Write_Char(3,1,'r');        LCD_Write_Char(4,1,'m');        LCD_Write_Char(5,1,0x3a);        LCD_Write_Char(6,1,'0' + second%10);            LCD_Write_Char(7,1,'0' + second/10);        LCD_Write_Char(8,1,0x3a);        LCD_Write_Char(9,1,'0' + minute%10);            LCD_Write_Char(10,1,'0' + minute/10);        LCD_Write_Char(11,1,0x3a);        LCD_Write_Char(12,1,'0' + hours%10);            LCD_Write_Char(13,1,'0' + hours/10);        ISendStr(0xae,80,dat,16); }}
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