哈工大单片机实验代码张毅刚教材个

1、电路图用张毅刚版教材里给的图！1、流水灯#include<reg52.h>#include<intrins.h>void delay() unsigned char i,j; for(i=0;i<255;i+) for(j=0;j<255;j+);void main() P2=0xfe; while(1) P2=_crol_(P2,1); delay(); 2、 单个外部中断#include<reg52.h>#include<intrins.h>void delay(unsigned char delay_time) unsigned

2、 int i,j; for(i=0;i<=delay_time;i+) for(j=0;j<=100;j+);void init_tx() EA=1; EX0=1; IT0=0;void main() P1=0x00; init_tx(); delay(200); while(1) P1=P1;delay(200); void tx0() interrupt 0 P1=0xfe; while(!INT0) P1=_crol_(P1,1);delay(200); P1=0xff;3、 定时器#include<reg52.h>unsigned char t=20;sbit

3、button=P32;sbit yellowled=P10; /*定义接口*/void main() TMOD=0x01; /*选择中断方式*/ EA=1; ET0=1; TH0=0x3c; TL0=0x0b; while(button=0) TR0=1; yellowled=1;void tx() interrupt 1 TH0=0x3c; TL0=0xb0; t-; if(t=0) yellowled=yellowled; t=20; 4、 双机串行通信#include<reg51.h>#define uchar unsigned char#define uint unsign

4、ed int#defineoutk P1#define out1 P0#define out2 P2uchar code seg=0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff;uchar key,send,rec;uchar scan(void);void delay(unit);void main(void) TMOD=0X20; /*设置定时器T1为方式2*/ TH1=0XF2; /*给定时器T1赋初值*/ TH1=0XF2; TR1=1; /*接通定时器T1*/ SCON=0X50; /*串行口方式1，REN=1允许接收*/

5、 PCON=0X00; /* SMOD=0*/ EA=1; ES=1; EX1=1; EX0=1; while(1) outk=0x07; out1=segsend; out2=segrec; uchar scan(void) uchar k=10,m,n,in; delay(10); outk=0x07; if(outk&0x07)!=0x07) for(m=0;m<3;m+) outk=(0x01<<(m+3); for(n=0;n<3;n+) in=outk; in=in>>n; if(in&0x01)=0) if(in&0x0

6、1)=0) k=n+m*3;break; if(k!=10)break; return(k);void delay(uint j) uchar i; for(;j>0;j-) i=250; while(-i); i=249; while(-i); void ext0()interrupt 0 EX0=0; key=scan(); if(key!=10)send=key+1; EX0=1;void ext1()interrupt 2 ES=0; SBUF=send; while(!TI); TI=0; ES=1;void com()interrupt 4 RI=0; rec=SBUF;5、

7、单片机与PC串行通信#include <reg51.h>void send(unsigned char dat)SBUF=dat;while(TI=0);TI=0;void init_tx()EA=1;EX0=1;void delay(void)unsigned char m,n;for(m=0;m<250;m+)for(n=0;n<250;n+);void main(void)init_tx();TMOD=0x20;SCON=0x40;PCON=0x00;TH1=0xfd;TL1=0xfd;TR1=1;while(1);void tx0() interrupt 0un

8、signed char i=0;send(0x01); delay();i+;6、扩展82c55并行IO接口#include<reg51.h>#include<absacc.h>#define uchar unsigned char#define uint unsigned intsbit rst_8255=P35;#define con_8255 XBYTE0x7003 /*0x7003为82C55的控制寄存器地址*/#define pa_8255 XBYTE0x7000 /*以下定义pa、pb的端口地址*/#define pb_8255 XBYTE0x7001voi

9、d reset_8255(void);void delay(uint);void main(void) uchar temp; rst_8255=1; /*复位*/ delay(1); rst_8255=0; con_8255=0x82; while(1) temp=pb_8255; /*锁存*/ pa_8255=temp; void delay(uint j) /*延时函数*/ uchar i;for(;j>0;j-) i=250; while(-i); i=249; while(-i);7、 矩阵键盘#include<reg51.h>unsigned char code

10、table=0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e;void delay() unsigned char i,j; （延时） for(i=0;i<=25;i+) for(j=0;j<=25;j+);unsigned char key_scan() unsigned char key0,key1; unsigned char key_num=0; P1=0x0f; 先将p1.0P1.3置高 key0=P1; if(key0!=0x0f) 如果P1.4P1.7不全为1

11、，可能有键按下 delay(); key0=P1; if(key0!=0x0f) P1=0xf0; key1=P1; if(key0=0x0e) switch(key1) case 0xe0: key_num=0;break; case 0xd0: key_num=1;break; case 0xb0: key_num=2;break; case 0x70: key_num=3;break; default: key_num=0;break; else if(key0=0x0d) switch(key1) case 0xe0: key_num=4;break; case 0xd0: key_n

12、um=5;break; (处理5号键) case 0xb0: key_num=6;break; case 0x70: key_num=7;break; default: key_num=0;break; （无效按键，如多个键同时按下） else if(key0=0x0b) switch(key1) case 0xe0: key_num=8;break; case 0xd0: key_num=9;break; case 0xb0: key_num=10;break; case 0x70: key_num=11;break; default: key_num=0;break; else if(ke

13、y0=0x07) switch(key1) case 0xe0: key_num=12;break; case 0xd0: key_num=13;break; case 0xb0: key_num=14;break; case 0x70: key_num=15;break; default: key_num=0;break; return key_num;void main() unsigned char key_num;dokey_num=key_scan();P2=tablekey_num;while(1); 8、1602液晶显示#include<reg51.h>#includ

14、e<intrins.h>#define uchar unsigned char#define uint unsigned int#define out P0sbit RS=P20;sbit RW=P21;sbit E=P22;void lcd_initial(void);void check_busy(void);void write_command(uchar com);void write_data(uchar dat);void string(uchar ad,uchar *s);void lcd_test(void);void delay(uint);void main(v

15、oid) lcd_initial();while(1) string(0x82,"Hello Welcome"); string(0xC2,"To China"); delay(100); write_command(0x01); delay(100);void delay(uint j) uchar i=250; for(;j>0;j-) while(-i); i=249; while(-i); i=250; void check_busy(void) uchar dt;do dt=0xff; E=0; RS=0; RW=1; E=1; dt=o

16、ut;while(dt&0x80);E=0;void write_command(uchar com) check_busy();E=0;RS=0;RW=0;out=com;E=1;_nop_();E=0;delay(1);void write_data(uchar dat) check_busy();E=0;RS=1;RW=0;out=dat;E=1;_nop_();E=0;delay(1);void lcd_initial(void) write_command(0x3c);write_command(0x0C);write_command(0x14);write_command(

17、0x01);delay(1);void string(uchar ad,uchar *s) write_command(ad);while(*s>0) write_data(*s+); delay(100);9、DA转换#include<reg51.h>#define uchar unsigned char#define uint unsigned int#define out P1sbit DAC_cs=P20;sbit DAC_wr=P21;void main(void) uchar temp,i=255; while(1) out=temp; DAC_cs=0; /*片选端，芯片被选中*/ DAC_wr=0; /*选通，并被锁存*/ DAC_cs=1; /*以下开始转换*/ DAC_wr=1; temp+; while(-i); /*延时函数！，老师帮改的*/ 10、AD转换#include<reg51.h>#define uchar unsigned char#define uint unsigned int#define LED P