哈工大单片机实验代码

1、电路图用张毅刚版教材里给的图！ ！1、流水灯#include<>#include<>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<>#include<>void delay(unsigned char delay_time)unsigned int i,j;for(i=0;i<=delay_time;i+)for

2、(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 0P1=0xfe;while(!INT0)P1=_crol_(P1,1);delay(200);P1=0xff;3、定时器#include<> unsigned char t=20;sbit button=P32;sbit yellowled=P10; /* 定义接口 */ void main()TMOD=0x01

3、; /* 选择中断方式 */ EA=1;ET0=1;TH0=0x3c;TL0=0x0b;while(button=0)TR0=1;yellowled=1;void tx() interrupt 1TH0=0x3c;TL0=0xb0;t-;if(t=0)yellowled=yellowled;t=20;4、双机串行通信#include<>#define uchar unsigned char#define uint unsigned int#define outk P1#define out1 P0#define out2 P2uchar code seg=0xc0,0xf9,0xa

4、4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff;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 */PCON=0X00;/* SMOD=0*/EA=1;ES=1;EX1=1;EX0=1;while(1)outk=0x07;out1=segsend;out2

5、=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&0x01)=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)

6、;i=249;while(-i);void ext0()interrupt 0EX0=0;key=scan();if(key!=10)send=key+1;EX0=1;void ext1()interrupt 2ES=0;SBUF=send;while(!TI);TI=0;ES=1;void com()interrupt 4RI=0;rec=SBUF;5、单片机与 PC串行通信#include <>void send(unsigned char dat) SBUF=dat;while(TI=0);TI=0;void init_tx()EA=1;EX0=1;void delay(vo

7、id)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 0unsigned char i=0;send(0x01);delay();i+;6、扩展 82c55 并行 IO 接口#include<> #include<>#define uchar unsigned char#define

8、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 XBYTE0x7001void 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

9、=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<>codeunsigned chartable=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

10、=0;j<=25;j+);unsigned char key_scan()unsigned char key0,key1;unsigned char key_num=0;P1=0x0f;先将 置高key0=P1;if(key0!=0x0f) 如果不全为 1，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:

11、 key_num=3;break;default: key_num=0;break;else if(key0=0x0d)switch(key1)case 0xe0: key_num=4;break;case 0xd0: key_num=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:

12、 key_num=9;break;case 0xb0: key_num=10;break;case 0x70: key_num=11;break;default: key_num=0;break;else if(key0=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

13、char key_num;dokey_num=key_scan();P2=tablekey_num;while(1);8、1602 液晶显示#include<>#include<>#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

14、dat);void string(uchar ad,uchar *s);void lcd_test(void);void delay(uint);void main(void)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=

15、250;void check_busy(void)uchar dt;dodt=0xff;E=0;RS=0;RW=1;E=1;dt=out;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_comma

16、nd(0x3c);write_command(0x0C);write_command(0x14);write_command(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<>#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;片选端，芯片被选中 */选通，并被锁存 */以下开始转换 */延时函数！，老师帮改的 */DAC_cs=0;/*DAC_wr=0;/*DAC_cs=1;/*DAC_wr=1;temp+;while(-i);/*10、AD转换#include<> #define uchar unsigned char#define uint unsigned int#define LED