51单片机秒表C语言程序

/*延时?函数*/ void delay(uint k) { uint i,j; for(i=0;i<k;i++){ for(j=0;j<121;j++) {;}}
} /*----------------------- 主函数 ------------------------- */
/*主函数*/
void main()
{
init_timer();
/*定时器 T0 初始化*/
while(1) /*无限循环*/
{
if(P2_4==0)scan_key(); /*有按键，调用按键扫描?函数*/
switch(set)
/*根据 set 键值散转*/
{
case 0:time(); break; /*走时时间程序*/
程序三
同时用两个定时器控制蜂鸣器发声， 定时器 0 控制频率，定时器 1 控制同个 频率持续的时间，间隔 2s 依次输出 1，10，50,100，200,400,800, 1k（hz）的方波
#include<reg52.h> //52 单片机头文件 #include <intrins.h> //包含有左右循环移位子函数的库 #define uint unsigned int //宏定义 #define uchar unsigned char //宏定义 sbit beep=P2^3;
ET0=1;//开定时器 0 中断
TR0=1;//启动定时器 0
a=0xfe;
while(1);//等待中断产生
}
void timer0() interrupt 1 { TH0=(65536-50000)/256; TL0=(65536-50000)%256; tt++; if(tt==2) {

#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
char cent=0;
char second=0;
char minite=0;
bit s2=0;
bit s3=0;
bit s4=0;
bit s5=0;
bit s6=0;
/********************************************************/
//函数名：void Delay1ms(uint count)
//功能：延时时间为1ms
//输入参数：count,1ms计数
//说明：总共延时时间为1ms乘以count,crystal=12Mhz
/*共阳数码管字型码*/
/*0,1,2,3,4,5,6,7,8,9,p.,灭*/
char code dis_code[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x0c,0xff,0xbf};
/*P点显示代码序号*/
char data find_code[]={0,0,12,0,0,12,0,0};
/********************************************************/
/*延迟函数*/
void Delay1ms(uint count)
{
uint j;
while(count--!=0)
{
for(j=0;j<80;j++);
}
}
/************************************************************************/

基于51单⽚机的时钟C语⾔代码#include#define uint unsigned int#define uchar unsigned charsbit dula=P2^6; //定义锁存器锁存端sbit wela=P2^7;sbit rs=P3^5; //定义1602液晶RS端sbit lcden=P3^4; //定义1602液晶LCDEN端sbit s1=P3^0; //按键功能键sbit s2=P3^1; //增⼤键sbit s3=P3^2; //减⼩键sbit rd=P3^7;sbit beep=P2^3;sbit sda=P2^0;sbit scl=P2^1;uchar a;void delay21(){ ;; }void start() //{sda=1;delay21();scl=1;delay21();sda=0;delay21();}void stop() //{sda=0;delay21();scl=1;delay21();sda=1;delay21();{uchar i;scl=1;delay21();while((sda==1)&&(i<250))i++; scl=0;delay21();}void init_24c02(){sda=1;delay21();scl=1;delay21();}void write_byte(uchar date) { uchar i,temp;temp=date;for(i=0;i<8;i++){temp=temp<<1;scl=0;delay21();sda=CY;delay21();scl=1;delay21();// scl=0;// delay21();}scl=0;delay21();sda=1;delay21();uchar read_byte(){uchar i,k;scl=0;delay21();sda=1;delay21();for(i=0;i<8;i++){scl=1;delay21();k=(k<<1)|sda;scl=0;delay21();}return k;}void write_add(uchar address,uchar date) { start();write_byte(0xa0);respons();write_byte(address);respons();write_byte(date);respons();stop();}uchar read_add(uchar address){uchar date;start();write_byte(0xa0);respons();write_byte(address);write_byte(0xa1);respons();date=read_byte();stop();return date;}uchar count,s1sum;char miao,shi,fen;uchar code table[]="2016-11-10 xiao";//定义初始上电时液晶默认显⽰状态void delay(uint z) {uint x,y;for(x=z;x>0;x--)for(y=110;y>0;y--);}void di(){beep=0;delay(100);beep=1;}void write_com(uchar com)//写指令{rs=0;lcden=0;P0=com;delay(5);lcden=1;delay(5);lcden=0;}void write_date(uchar date)//写数据{rs=1;delay(5);lcden=1;delay(5);lcden=0;}void write_sfm(uchar add,uchar date){uchar shi,ge;shi=date/10;ge=date%10;write_com(0x80+0x40+add); //设置显⽰位置write_date(0x30+shi);write_date(0x30+ge);}void init()//初始化函数{uchar num;rd=0; //软件将矩阵按键第四列⼀端置低⽤以分解出独⽴按键dula=0; //关闭两锁存器锁存端；防⽌操作液晶时数码管出现乱码wela=0;lcden=0;fen=0;miao=0;shi=0;count=0;s1sum=0;init_24c02(); //write_com(0x38); //初始化1602液晶write_com(0x0c);write_com(0x06);write_com(0x01);write_com(0x80); //设置显⽰初始坐标for(num=0;num<16;num++){write_com(0x80+0x40+6); //显⽰时间的冒号write_date(':');delay(5);write_com(0x80+0x40+9);write_date(':');delay(5);miao=read_add(1);//⾸次上电从AT24C02中读出的存储的数据fen=read_add(2);shi=read_add(3);write_sfm(10,miao); //分别送去液晶显⽰write_sfm(7,fen);write_sfm(4,shi);TMOD=0x01;//设置定时器0为⼯作⽅式1TH0=(65536-50000)/256;TL0=(65536-50000)%256;EA=1;//开总中断ET0=1;//开定时器0中断TR0=1;//启动定时器0}void keyscan() //按键扫描函数{if(s1==0){delay(5);if(s1==0) //确认功能键被按下{s1sum++; //功能键按下记录次数while(!s1); //释放确认di(); //每当有按键释放蜂鸣器发出滴声if(s1sum==1) //第⼀次被按下时{TR0=0; //关闭定时器write_com(0x80+0x40+10); //光标定位到秒位置if(s1sum==2) //第⼆次按下光标定位到分位置{write_com(0x80+0x40+7);}if(s1sum==3) //第⼆次按下光标定位到时位置{write_com(0x80+0x40+4);}if(s1sum==4) //第四次按下{s1sum=0; //记录按键数清零write_com(0x0c); //取消光标闪烁TR0=1; //启动定时器使时钟开始⾛}}}if(s1sum!=0) //只有功能键被按下后，增⼤和减⼩键才有效{ if(s2==0){delay(5);if(s2==0) //增加键确认被按下{while(!s2); //按键释放di();if(s1sum==1) //若功能键第⼀次按下{miao++; //+1秒if(miao==60) miao=0;write_sfm(10,miao);//调节⼀次送液晶显⽰⼀次write_com(0x80+0x40+10);//显⽰位置重新回到调节处write_add(1,miao); //数据改变⼀次⽴即存⼊24C02 }if(s1sum==2){if(fen==60) fen=0;write_sfm(7,fen);write_com(0x80+0x40+7);write_add(2,fen);}if(s1sum==3){shi++;if(shi==24) miao=0;write_sfm(4,shi);write_com(0x80+0x40+4);write_add(3,shi);}}}if(s3==0){delay(5);if(s3==0) //增加键确认被按下{while(!s3); //按键释放di();if(s1sum==1) //若功能键第⼀次按下{miao--; //+1秒if(miao==-1) miao=59;write_sfm(10,miao);//调节⼀次送液晶显⽰⼀次write_com(0x80+0x40+10);//显⽰位置重新回到调节处write_add(1,miao); //数据改变⼀次⽴即存⼊24C02 } if(s1sum==2){fen--;if(fen==-1) fen=59;write_sfm(7,fen);write_add(2,fen);}if(s1sum==3){shi--;if(shi==-1) miao=23;write_sfm(4,shi);write_com(0x80+0x40+4);write_add(3,shi);}}}}}void main(){init(); //初始化各数据while(1){keyscan(); //不停地检测按键是否被按下}}void time0() interrupt 1 //定时器0中断服务程序{TH0=(65536-50000)/256;TL0=(65536-50000)%256;count++;if(count==20) //20次50毫秒为⼀秒{count=0;miao++;if(miao==60){miao=0;fen++;{fen=0;shi++;if(shi==24){shi=0;}write_sfm(4,shi); //⼩时若变化则重新写⼊write_add(3,shi); //数据改变⽴即存⼊24C02 }write_sfm(7,fen);write_add(2,fen);}write_sfm(10,miao);write_add(1,miao);}}。

if ((v&0x40) && (bGlink)) c=0x00;
P2=c;P3=Ledc;
Ledc++;
if (Ledc>=8) Ledc=0;}
void readkey()
{ char c;
c=P1;
c&=0x0f;
if (c==0x0f)
{KeyDelay=10;}
else
{if (KeyDelay)
while(1)
{
KeyHandle();
CountToLeds();
CountsToLed();
}}
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#include <string.h>
#include <stdio.h>
#include <reg51.h>
#define MAXC 5
bit isStart;
bit isLock;
bit isQuery;
unsigned int Count; //0.1s
{ KeyDelay--;}
else
{ KeyValue=c;
isKey=1;
KeyDelay=300;
} }}
void t0int() interrupt 1 //1ms
{
TH0=(-1000)>>8;
TL0=-1000;
display();
readkey();
T1msc++;
if (isStart)iLock=1;Countp2=(MAXC+Countp-1)%MAXC;
}
void KeyHandle()