单片机程序汇总,大家参考一下剖析

第八章4节支持手打！！#include<reg51.h>#include <math.h>#define PI 3.1415unsigned int num;void main() {while (1) {for (num = 0 ; num < 360 ; num++)P2= 127 +127 * sin((float)num / 180 * PI);}}#include<absacc.h>#define DAC0832 XBYTE[0xfeff] //设置DAC0832的访问地址unsigned char num;void main() {while (1) {for (num = 0 ; num < 255 ; num++) //上升段波形DAC0832=num;for (num = 255 ; num > 0 ; num--) //下降段波形DAC0832=num;//DAC0832转换输出}}#include<absacc.h>#include<reg51.h>#define DAC1 XBYTE[0xfeff] //设置1#DAC0832输入锁存器的访问地址#define DAC2 XBYTE[0xfdff] //设置2#DAC0832输入锁存器的访问地址#define DAOUT XBYTE[0xefff] //两个DAC0832的DAC寄存器访问地址void main (void){unsigned char num; //需要转换的数据while(1){for(num =0; num <=255; num++){DAC1 = num; //上锯齿送入1#DACDAC2 = 255-num; //下锯齿送入2#DACDAOUT = num; //两路同时进行D/A转换输出}}}/*发送程序*/#include<reg51.h>#define uchar unsigned charchar code map[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};//'0'~'9'void delay(unsigned int time){unsigned int j = 0;for(;time>0;time--)for(j=0;j<125;j++);}void main(void){uchar counter=0; //定义计数器TMOD=0x20; //T1定时方式2TH1 = TL1 = 0xf4; //2400b/sPCON=0; //波特率不加倍SCON = 0x50; //串口方式1,TI和RI清零,允许接收;TR1=1; //启动T1while(1){SBUF = counter; //发送联络信号while(TI==0); //等待发送完成TI = 0; //清TI标志位while(RI==0); //等待乙机回答RI = 0;if(SBUF ==counter){ //若返回值与发送值相同,组织新数据P2 = map[counter]; //显示已发送值if(++counter>9) counter=0;//修正计数器值delay(500);}}}/*接收程序*/#include<reg51.h>#define uchar unsigned charchar code map[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};//'0'~'9'void main(void){uchar receiv; //定义接收缓冲TMOD=0x20; //T1定时方式2TH1=TL1=0xf4; //2400b/sPCON=0; //波特率不加倍SCON=0x50; //串口方式1,TI和RI清零,允许接收;TR1=1; //启动T1while(1){while(RI==1){ //等待接收完成RI = 0; //清RI标志位receiv = SBUF; //取得接收值SBUF = receiv; //结果返送主机while(TI==0); //等待发送结束TI = 0; //清TI标志位P2 = map[receiv];//显示接收值}}}第六章方式一。

查询方式：#include <reg51.h>sbit P2_0=P2^0;void main (void) {TMOD = 0x01; //T0定时方式1TR0=1; //启动T0for( ; ; ){TH0 = 0xfc; //装载计数初值TL0 = 0x18;do{ } while(!TF0); //查询等待TF0复位P2_0 =!P2_0; //定时时间到P1.0反相TF0 = 0; //软件清TF0}}中断方式：#include <reg51.h>sbit P2_0=P2^0;void timer0 (void) interrupt 1 {P2_0 = !P2_0; //P1.0取反TH0 = 0xfc; //计数初值重装载TL0 = 0x18;}void main (void) {TMOD = 0x01; //T0定时方式1P2_0=0;TH0=0xfc; //预置计数初值TL0=0x18;EA=1;ET0=1;TR0=1;do { } while (1);}方式2中断方式#include <reg51.h>sbit P2_0=P2^0;timer0 () interrupt 1 { //T0定时中断P2_0 = !P2_0; //P1.0取反}main(){TMOD = 0x02; //T0定时方式2TH0 = TL0 = 0x06;EA= ET0 = 1;TR0=1;while(1);}#include <reg51.h>unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; unsigned char count=0; //计数器赋初值int0_srv () interrupt 1{ //T0中断函数if(++count==100) count=0; //判断循环是否超限P0=table[count/10]; //显示十位数P2=table[count%10]; //显示个位数}main(){P0=P2=table[0]; //显示初值“00”TMOD=0x06; //T0计数方式2TH0=TL0=0xff; //计数初值ET0=1; //开中断EA=1;TR0=1; //启动T0while(1);}计数#include <reg51.h>sbit P3_0=P3^0;void main (){TMOD = 0x06; //设置为T0计数方式2TL0 = 0xff; //初值0xff可使1个外来脉冲即产生溢出TR0 = 1; //启动计数器while (1){while (!TF0); //等待首次溢出TF0 = 0; //清TF0溢出标志TMOD = 0x02; //设置为T0定时方式2TL0=0x06; //500微秒定时初值P3_0 = 0;while (!TF0); //等待再次溢出TF0 = 0; //清TF0溢出标志P3_0 = 1;TMOD = 0x06; //设置为T0计数方式2TL0 = 0xff; //1次溢出计数初值}}#include <reg51.h>#define uchar unsigned charuchar time; //中断次数uchar period=250; //1个周期的次数uchar high=50; //20%高电平的次数timer0() interrupt 1{//T0中断函数TH0=0xd1; //重装载计数初值TL0=0x20;if (++time==high) P2=0;//高电平时间到，P2变低else if (time==period){time=0;P2=1;}//周期时间到，P2变高}void main (){TMOD = 0x01; //T0定时方式1TH0 = 0xd1; //首次装入计数初值TL0 = 0x20;EA=ET0=1;TR0 = 1; //启动计数器do { }while (1);}#include <reg51.h>#define uchar unsigned charbit ldelay=0; //长定时溢出标记uchar t=0; //定时溢出次数void main(void) {uchar code ledp[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};uchar ledi; //指示显示顺序TMOD=0x01; //定义T0定时方式1TH0 =0x3c;TL0 =0xb0;//溢出20次=1秒（12M晶振)TR0=1;EA=ET0=1;while(1){if(ldelay) { //发现有时间溢出标记，进入处理ldelay=0; //清除标记P2=ledp[ledi]; //读出一个值送到P2口ledi++; //指向下一个if(ledi==8)ledi=0;//到了最后一个灯就换到第一个}}}timer0() interrupt 1 { //T0中断函数if(++t==20){t=0; ldelay=1;}//刷新长定时溢出标记TH0 =0x3c;TL0 =0xb0; //重置T0初值}第五章#include <reg51.h>char led_mod[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07, //led字模0x7f,0x6f,0x77,0x7c,0x58,0x5e,0x79,0x71};char key_buf[] = {0xee, 0xde, 0xbe, 0x7e,0xed, 0xdd, 0xbd, 0x7d,//键值0xeb, 0xdb, 0xbb, 0x7b,0xe7, 0xd7, 0xb7, 0x77};void getKey () interrupt 0{ //中断函数char key_scan[] = {0xef, 0xdf, 0xbf, 0x7f}; //键扫描码char i = 0, j = 0;for (i = 0; i < 4 ; i++) {P2= key_scan[i]; //输出扫描码for (j = 0 ; j < 16 ;j++) {if (key_buf[j]== P2){ //读键值,并判断键号P0= led_mod[j]; //显示闭合键键号break;}}}P2=0x0f; //为下次中断做准备}void main(void) {P0 = 0x00; //开机黑屏IT0=1; //脉冲触发EX0=1; //INT0允许EA=1; //总中断允许P2 = 0x0f; //为首次中断做准备,列线全为0,行线全为1while(1); //模拟其他程序功能}#include "reg51.h"char led[]={0xfe,0xfd,0xfb,0xf7};//LED花样数据bit dir=0,run=0; //全局变量void delay(unsigned int time);key() interrupt 0{ //键控中断函数switch (P0 & 0x0f){ //修改标志位状态case 0x0e:run=1;break;case 0x0d:run=0,dir=0;break;case 0x0b:dir=1;break;case 0x07:dir=0;break;}}void main(){char i;IT0=1;EX0=1;EA=1;//边沿触发、INT0允许、总中断允许while(1){if (run)if(dir) //若run=dir=1,自上而下流动for(i=0;i<=3;i++){P2=led[i];delay(200);}else //若run=1，dir=0,自下而上流动for(i=3;i>=0;i--){P2=led[i];delay(200);}else P2=0xff; //若run=0,灯全灭}}void delay(unsigned int time){unsigned int j = 0;for(;time>0;time--)for(j=0;j<125;j++);}#include "reg51.h"char led_mod[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07, //led字模0x7f,0x6f}; //显示字模sbit D1=P3^0;void delay(unsigned int time){//延时unsigned char j=255;for(;time>0;time--)for(;j>0;j--);}key0() interrupt 0 { //K0中断函数unsigned char i;D1=IE0; //IE0状态输出for(i=0;i<=9;i++){ //字符0-9循环1圈P2=led_mod[i];delay(35000);}P2=0x40; //结束符“-”}key1() interrupt 2 { //K1中断函数unsigned char i;for(i=0;i<=9;i++){ //字符0-9循环1圈D1=IE0; //IE0状态输出P1=led_mod[i];delay(35000);}P1=0x40; //结束符“-”}void main(){unsigned char i;TCON = 0x05; //脉冲触发方式PX0=0;PX1=1; //INT1优先D1=0;P1=P2=0x40; //输出初值IE=0x85; //开中断while(1){for(i=0;i<=9;i++){ //字符0-9无限循环P0=led_mod[i];delay(35000);}}}第四章//实例1 独立按键识别#include <REG51.H>void main() {char key = 0;while(1){key = P0 & 0x0f; //读取按键状态if (key != 0x0f) P2 = key; //显示到led }}#include "reg51.h"unsigned char led[]={0xfe,0xfd,0xfb,0xf7}; //LED灯的花样数据void delay(unsigned char time){ //延时函数unsigned int j=15000;for(;time>0;time--)for(;j>0;j--);}void main(){bit dir=0,run=0; //标志位定义及初始化char i;while(1){switch (P0 & 0x0f){ //读取键值case 0x0e:run=1;break; //K1动作，设run=1case 0x0d:run=0,dir=0;break;//K2动作，设run=dir=0case 0x0b:dir=1;break; //K3动作，设dir=1case 0x07:dir=0;break; //K4动作，设dir=0}if (run) //若run=dir=1, 自上而下流动if(dir)for(i=0;i<=3;i++){P2=led[i];delay(200);}else //若run=1,dir=0, 自下而上流动for(i=3;i>=0;i--){P2=led[i];delay(200);}else P2=0xff; //若run=0，灯全灭}}#include <reg51.H>sbit P3_7=P3^7; //定义计数器端口unsigned char count =0; //定义计数器unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};void delay(unsigned int time){unsigned int j = 0;for (;time>0;time --)for(j = 0;j<125;j++);}void main(void) {P0=P2=table[0]; //显示初值00while(1) {if(P3_7==0){ //检测按键是否压下delay(10);if(P3_7==0){count++; //计数器增1if(count==100) count=0; //判断循环是否超限P0=table[count/10]; //十位输出显示P2=table[count%10]; //个位输出显示while(P3_7==0); //等待按键抬起，防止连续计数}}}}。