单片机实验题

四个二极管轮流亮#include <reg51.h>#define uchar unsigned charuchar tab[ ]={0x01,0x02,0x04,0x08}; void delay() { uchar ij;for(i=0; i<255; i++)for(j=0; j<255; j++)；}void main(){ uchar i;while (1){ for(i=0;i<4; i++){ Pl=tab[i];delay()；}}}点亮一只发光二极管#include <reg51.h>#define uchar unsigned charvoid main (void){Pl=0x01;}1、点亮8只发光二极管#include <reg51.h>#define uchar unsigned charvoid main (void)Pl=Oxff;K 一只发光二极管闪烁控制#include <reg51.h>#define uchar unsigned charuchar tab[ ]={0x01 z 0x02,0x04,0x0&0x10,0x20,0x40,0x80}; void delay(){ uchar ij;for(i=0; i<255; i++)for(j=0; j<255; j++)；}void main(){ uchar i;while (1){ for(i=0;i<8; i++){ Pl=tab[i];delay()；}}}让8只发光二极管朝相反的方向轮流点亮#include <reg51.h>#define uchar unsigned charuchar tab[ ]={ 0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01}; void delay(){ uchar ij;for(i=0; i<255; i++)for(j=0; j<255; j++)；}void main(){ uchar i;while (1){ for(i=0;i<8; i++){ Pl=tab[i];delay()；让8只发光二极管从两边开始轮流点亮#include <reg51.h>#define uchar unsigned charuchar tab[ ]={ 0x81,0x42,0x24,0x18};void delay(){ uchar ij;for(i=0; i<255; i++)for(j=0; j<255; j++)；}void main(){ uchar i;while (1){ for(i=0;i<4; i++){ Pl=tab[i]; delay()；}}}让8只发光二极管从中间开始向两边轮流点亮#include <reg51.h>#define uchar unsigned charuchar tab[ ]={ 0x18,0x24,0x42,0x81};void delay(){ uchar ij;for(i=0; i<255; i++)for(j=0; j<255; j++)；}void main(){ uchar i;while (1){ for(i=0;i<4; i++){ Pl=tab[i];delay()；}}}使用单片机的P2 口, P2 口的高半字节接发光二极管，低半字节接开关，编程实现开关对灯的控制（开关按下灯亮，放开灯灭）。

#in clude<reg51.h>#define uchar unsigned char void delay()uchar i z j; for(i=0;i<255;i++) for(j=0;j<255;j++);}void main(){while(l){unsigned char temp; P2=0XFF;temp=P2&OXOF; temp=temp«4; P2=~temp;delay();»检测4个开关S1~S4的状态，只需识别出单个开关闭合(按下)的状态。

例如仅开关S1合上时，数码管显示“1” ；仅开关S2合上时，数码管显示“2” ；仅开关S3合上时，数码管显示“3” ；仅开关S4合上时，数码管显示“4” ；当没有开关合上，或合上的开关多于1个时，数码管均显示"0力o#include<reg51.h>#define uchar unsigned charvoid main(){uchar state;doP1=OXFF;state=Pl; state=state&OXOF;switch(~state)case 0XF0:P2=0XC0;break;case 0XFl:P2=0XF9;break; case 0XF2:P2=0XA4;break;case 0XF4:P2=0XB0;break;case 0XF8:P2=0X99;break; default:P2=0XC0;break;}}while(l);(1)显示一个H；#in clude<reg51.h>void main(){P2=0x76;Pl=0xfe;}(1)单个数码管循环显示o, 2, 4, 6, 8；#in clude<reg51.h>#define uchar unsigned char#define uint unsigned intuchar code dis[]={0x3f/0x5b,0x66/0x7d/0x7f};void delay(uint t){uchar i;while(t-) for(i=0;i<200;i++);void main(){ uchar i;Pl=0xfe;while(l){ for(i=0;i<5;i++){P2=dis[i]; delay(900);}}}在数码管上显示你的8位学号;# include<reg51.h>#include<intrins.h>#define uchar unsigned char#define uint unsigned intuchar code dis[]={0x06/0x07/0x06/0x3t0x7d/0x06/0x7d z0x07};void delay(uint t){uchar i;while(t-)for(i=0;i<255;i++);}void main(){uchar ij=0x01;while(l){for(i=0;i<8;i++){Pl=~j;P2=dis[i];j=_crol_(j,l);delay(l);}}}在其中两个数码管上实现从0—99循环显示。

#in clude<reg51.h># include<intrins.h>#define uchar unsigned char#define uint unsigned intuchar code dis[]={0xc0,0xf9,0xa4/0xb0,0x99/0x92/0x82/0xf8/0x80/0x90,};void delay(uint t)uchar i; while(t-)for(i=0;i<255;i++);void main(){uchar ij;while(l){for(j=0;j<10;j++){ for(i=0;i<10;i++)Pl=dis[i];PO=dis[j]; delay(200);}}}}动态显示#in clude<reg51.h>#define uchar unsigned char#define uint unsigned intsbit P1_O=P"O;sbit P1_1=P1A1;uchar code tab[]={0x3f/0x06/0x5b,0x4f/0x66,0x6d/0x7d/0x07/0x7t0x6f};void delay(uint t){uchar j;uint i;for(i=0;i<t;i++)for(j=0;j<102;j++);}while(l)void main()uint j;for(j=0;j<100;j++){ P1_O=1;P1_1=O;P2=tab[j%10];delay(200);P1-O=O;P1-1=1;P2=tab[j/10];delay(200);}}}中断插入低四位高四位轮流跳#in clude<reg51.h>#define uchar unsigned charvoid Delay(unsigned int i){unsigned int j;for(;i>0;i-)for(j=0;j<333;j++){;}}void main(){EA=1;EXO=1;ITO=1;while(l){Pl=Oxff;}}void int0() interrupt 0 using 1{uchar m;EXO=O;for(m=0;m<5;m++){Pl=OxOf;Delay(400);Pl=OxfO;Delay(400);}void displayl(uchar weil,uchar shu)EXO=1;}计数器脉冲10次 二极管变化#in clude<reg51.h>sbit P2_0=P2A 0;void main(){TMOD=0x50;TH 1=(65536-10)/256;TLl=(65536-10)%256;EA=1;ET1=1;TR1=1;P2=0xff;while(l);}void a() interrupt 3{THl=(65536-10)/256;TLl=(65536-10)%256;P2少! P2_0;}60s 倒计时#in clude<reg51.h>#define guan P0#define wei P2#define uchar unsigned char#define uint unsigned intuint m=0;ucharjk,s=60;sbit beep=P2A 3;unsigned char code weiyu[]={0xlf,0x2f,0x4f,0x8f}; unsigned char code table[]={0x3t0x06/0x5b /0x4f /0x66,0x6d /0x7d / 0x07,0x7f /0x6f0x77,0x7cX )x39/0x5e ，0x79,0x71}; void delay(unsigned char xms){for(j=xms;j>0;j-)for(k=125;k>0;k-);} wei=0xff;PO=table[shu];wei=wei&weiyu[weil]; delay(5); }void display(uchar a,uchar b){displayl(2,a);display]⑶ b);}void main(){TMOD=0x01;ETO=1;TRO=1;EA=1;while(l){if(m==20){m=0;s-S}al=s/10;a0=s%10;display®,aO);if(s==O){TRO=O;beep=0;}}}void TO_TIMER () interrupt 1 { TH0=(65536-46080)/256;TL0=(65536-46080)%256; m++; }。