单片机入门小程序

1、 51单片机的学习是一个动手实践的过程，很多同学在学习单片机的初期总是觉得很难，无法入门。本人根据自己的学习经历，结合自己刚学习单片机的体验，写下几个小的程序供大家参考，如能掌握如下几个小程序的思想与精髓，那么就已经探踏入了单片机的大门。学习单片机的核心就是动手实践，当我们通过自己的努力把第一个LED点亮时，我们就会信心加倍，之后的学习就会变得轻松!希望对大家有所帮助。一个LED闪烁#include<reg51.h>sbit led=P03;unsigned int a;void main() P0=0x00; while(1)a=100000;led=1;while(a-);a=

2、10000;led=0;while(a-);两个led闪烁#include<reg51.h>#define uchar unsigned char#define uint unsigned intvoid delay();void main() while(1) P0=0xaa; delay(); P0=0x00;delay(); void delay()uchar x,y;for(x=110;x>0;x-)for(y=120;y>0;y-);流水灯#include<reg51.h> #include<intrins.h> void delay(

3、); void main() unsigned char temp; P0=0xef;temp=P0;delay();while(1) temp=_crol_(temp,1);delay(); void delay() unsigned char x,y; for(x=40;x>0;x-) for(y=200;y>0;y-); 键控移位信号灯#include<reg51.h>#include<intrins.h>#define uchar unsigned char#define uint unsigd neintsbit k1=P10;sbit k2=P1

4、1;void delay(uchar z);void main() P0=0X18; while(1) if(k1)P0=_crol_(P0,1);if(k2)P0=_cror_(P0,1); void delay(uchar z)uchar x,y;for(x=z;x>0;x-)for(y=120;y>0;y-);中断的简单应用1. 利用定时器中断实现LED闪烁#include<reg51.h>#define uchar unsigned char#define uint unsigned intsbit led1=P10;uchar num;void main()

5、P1=0x00;TMOD=0x01;TH0=(65536-45872)/265;TL0=(65536-45872)%256;EA=1;ET0=1;TR0=1;while(1);void T0_time()interrupt 1TH0=(65536-45872)/256;TL0=(65536-45872)%256;num+;if(num=20)num=0;led1=led1;2. 数码管记录LED闪的次数#include<reg51.h>#define uchar unsigned char#define uint unsigned intsbit led=P12;void disp

6、lay(uchar,uchar);uchar num=0,num1=0,num2=0,shi=0,ge=0;uchar code array10=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07;void main()TMOD=0x11;TH0=(65536-45872)/256;TL0=(65536-45872)%256;TH1=(65536-45872)/256;TL1=(65536-45872)%256;EA=1;ET0=1;ET1=1;TR0=1;TR1=1;while(1);display(shi,ge);void display(uchar shi,u

7、char ge)P2=0x03;/P10=arrayshi;/ P11=arrayge;/*void delay(z)uchar x,y;for(x=z;x>0;x-)for(y=110;y>0;y-); */void Time0() interrupt 1 TH0=(65536-45872)/256;TL0=(65536-45872)%256;num+;if(num=4) num=0; led=led;void Time1() interrupt 2TH1=(65536-45872)/256;TL1=(65536-45872)%256;num1+;if(num1=20)num1=

8、0;num2+;if(num2=60)num2=0;shi=(num2)/10;ge=(num2)%10;数码管的动态显示#include<reg51.h>#define uchar unsigned char#define uint unsigned intuchar code duan9=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07;void delay();void main() while(1) P2=0x7f; P0=0x3f; delay(); P2=0xbf; P0=0x06; delay(); P2=0xdf; P0=0x5b; d

9、elay(); P2=0xef; P0=0x4f; delay(); P2=0xf7; P0=0x66; delay(); P2=0xfb; P0=0x6d; delay(); P2=0xfd; P0=0x7d; delay(); P2=0xfe; P0=0x07; delay(); void delay()uint x,y;for(x=10;x>0;x-)for(y=10;y>0;y-);数码管的静态显示#include<reg51.h>#define uchar unsigned char#define uint unsigned intuchar code arr

10、y10=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f;void delay(uint z);void main()P2=0x00;while(1)uchar i;for(i=0;i<10;i+)P0=arryi;delay(500);void delay(uint z)uint x,y;for(x=z;x>0;x-)for(y=110;y>0;y-);数码管显示8#include<reg51.h> void main() P2=0x7f; /位选端低电平有效P0=0x7f; /段选高电平有效（共阴）while(

11、1); AD转换#include<reg51.h>#include<intrins.h>#define uchar unsigned charsbit wr=P36;sbit rd=P37;sbit dula=P26;sbit wela=P27;uchar code shuma=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71;void delay(uchar z)uchar x,y;for(x=z;x>0;x-)for(y=110;y>0;y-);void

12、display(uchar bai,uchar shi,uchar ge) dula=1;P0=shumabai;dula=0;P0=0xff;wela=1;P0=0x7e;wela=0;delay(10);dula=1;P0=shumashi;dula=0;P0=0xff;wela=1;P0=0x7d;wela=0;delay(10);dula=1;P0=shumage;dula=0;P0=0xff;wela=1;P0=0x7b;wela=0;delay(10); void main() uchar A,B,C,i,adresult;float wela=1; P0=0x7f;/开ADCSw

13、ela=0;while(1) wr=1; _nop_(); wr=0; _nop_(); wr=1; _nop_(); for(i=0;i<10;i+) display(A,B,C); P1=0Xff; rd=1; _nop_(); rd=0; _nop_(); rd=1; adresult=P1;/ =(adresult*5)/256; A=adresult/256; B=adresult%256/16; C=adresult%256%16; LCD1602显示#include<reg52.h>#define uchar unsigned charsbit lcden=P3

14、4; /使能端sbit lcdrs=P35;/写数据，写命令控制端/sbit lcdrw=P36;#define lcd P0void delay(uchar z)/延时函数uchar x,y;for(x=z;x>0;x-) for(y=120;y>0;y-);void write_data(uchar Data)/写数据lcden=0;lcdrs=1;lcden=1;delay(10);lcd=Data;lcden=0;delay(10); void write_commend(uchar com) /写命令lcden=0;lcdrs=0;lcden=1;delay(10);lc

15、d=com;lcden=0;delay(10);void initial() /初始化函数 、 write_commend(0x01);/清屏 write_commend(0x38); write_commend(0x0c); write_commend(0x06);void main() uchar i,j; uchar fei="wudian" uchar benfei="jia you!" ;/ lcdrw=0;initial();/while(1); write_commend(0x80);/write_data('f');/wr

16、ite_data('e');/write_data('i');/write_data('f');/write_data('e');/write_data('i');/write_data('f');/write_data('l'); for(j=0;j<6;j+)write_data(feij);write_commend(0xc2);for(i=0;i<11;i+) write_data(benfeii);1602显示AD转换结果#include<reg52.h&

17、gt;#define uchar unsigned charsbit lcden=P34; /使能端sbit lcdrs=P35;/写数据，写命令控制端/sbit lcdrw=P36;#define lcd P0void delay(uchar z)/延时函数uchar x,y;for(x=z;x>0;x-) for(y=120;y>0;y-);void write_data(uchar Data)/写数据lcden=0;lcdrs=1;lcden=1;delay(10);lcd=Data;lcden=0;delay(10); void write_commend(uchar co

18、m) /写命令lcden=0;lcdrs=0;lcden=1;delay(10);lcd=com;lcden=0;delay(10);void initial() /初始化函数 、 write_commend(0x01);/清屏 write_commend(0x38); write_commend(0x0c); write_commend(0x06);void main() uchar i,j; uchar fei="wudian" uchar benfei="jia you!" ;/ lcdrw=0;initial();/while(1); write

19、_commend(0x80);/write_data('f');/write_data('e');/write_data('i');/write_data('f');/write_data('e');/write_data('i');/write_data('f');/write_data('l'); for(j=0;j<6;j+)write_data(feij);write_commend(0xc2);for(i=0;i<11;i+) write_dat

20、a(benfeii);直流电机#include<reg51.h>#define uchar unsigned charsbit wr=P36;sbit csda=P32;sbit s1=P34;/加速/sbit s2=P35;/减速sbit wela=P27;sbit dula=P26;uchar num2,num1,n,A2,A3;uchar k=5;uchar code shumaguan10=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07;uchar code shudu5=0x00,0x0f,0x8f,0xf0,0xff;void delay(uchar z)uchar x,y;for(x=z;x&g