课件分析教案

实例5：将P1口状态分别送入P0、P2、P3口：认识I/O口的引脚功 实例6：使用P3口流水点亮8位 实例7：通过对P3口地址的操作流水点亮8位 实例9：用P0口、P1口分别显示加法和减法运算结 实例10：用P0、P1口显示乘法运算结 实例11：用P1、P0口显示除法运算结 实例12：用自增运算控制P0口8位LED流水花 实例13：用P0口显示逻辑"与"运算结 实例14：用P0口显示条件运算结 实例15：用P0口显示按位"异或"运算结 实例16：用P0显示左移运算结 w c 实例19：用if语句控制P0口8位LED的流水方 实例20：用swtich语句的控制P0口8位LED的点亮状 实例21：用for语句控制蜂鸣器鸣笛次 实例22：用while语句控制 实例23：用do-while语句控制P0口8位LED流水点 实例24：用字符型数组控制P0口8位LED流水点 实例25：用P0口显示字符串常 实例26：用P0口显示指针运算结 实例27：用指针数组控制P0口8位LED流水点 实例28：用数组的指针控制P0口8位LED流水点 实例29：用P0、P1口显示整型函数返回 实例30：用有参函数控制P0口8位LED流水速 实例32：用指针作函数参数控制P0口8位LED流水点 实例33：用函数型指针控制P1口灯花 实例35：字符函数ctype.h应用举 实例36：内部函数intrins.h应用举 实例37：标准函数stdlib.h应用举 实例38：字符串函数string.h应用举 *****************************************************************中断、定时器********中断、定时器*********************中断、定时器*********中断、定时器******** 实例42：用定时器T0查询方式P2口8位控制LED闪 实例43：用定时器T1查询方式控制单片机发出1KHz音 实例44：将计数器T0计数的结果送P1口8位LED显 实例45：用定时器T0的中断控制1位LED闪 实例46：用定时器T0的中断实现长时间定 实例47：用定时器T1中断控制两个LED以不同周期闪 实例48：用计数器T1的中断控制蜂鸣器发出1KHz音 实例49：用定时器T0的中断实现"渴望"曲的实例50-1：输出50个矩形脉 实例50-2：计数器T0统计外部脉冲 实例51-2：定时器T0的模式2测量正脉冲宽 实例52：用定时器T0控制输出高低宽度不同的矩形 实例53：用外中断0的中断方式进行实例54-1：输出负脉宽为200微秒的方 实例55：方式0控制流水灯循环点 w 实例58：单片机向PC发送数 实例59：单片机接收PC发出的数 实例60：用LED数码显示数字 实例61：用LED数码显示器循环显示数字 实例63：用LED数码显示器伪静态显示数字 实例67：用LED数码管显示计数器T0的计数 *********键盘控制**** 实例71：CPU控制的独立式键盘扫描实 实例73：独立式键盘控制的4级变速流水 实例81：用LCD显示字符 实例82：用LCD循环右移显示 eto 实例83：用LCD显示适时检测结 ww ******************************w*Cwrd********************些的使用 红外 实例85：将数据"0x0f"写入AT24C02再读出送P1口显 实例86：将按键次数写入AT24C02，再读出并用1602LCD显 实例87：对I2C总线上挂接多个AT24C02的读写操 实例88：基于AT24C02的多机通信程 实例88：基于AT24C02的多机通信写入程 实例90：DS18B20温度检测及其液晶显 实例91：将数据"0xaa"写入X5045再读出送P1口显 实例92：将流水灯控制码写入X5045并读出送P1口显 实例93：对SPI总线上挂接多个X5045的读写操 实例94：基于ADC0832的数字电压 实例95：用DAC0832产生锯齿波电 实例96：用P1口显示红外的按键 实例98：基于DS1302的日历时 模拟霍尔脉 void{}实例w void {unsignedinti; //做20000次空循环 }（C1个主函数voidmain(void){ { //P1=11111110BP1.0 //P1=11111111BP1.0 }} （C1个主函数void{ { //将P1口状态送入P0口 //将P1口状态送入P2口 //将P1口状态送入P3口}}w wwwPLCworld void{unsignedchari,j;;}voidmain(void){

}}w wwwPLCworld sfrx=0xb0; //8位特殊功能寄存器,对地址xP1voiddelay(void){unsignedchari,j; }voidmain(void){{ }w wwwPLCworld} voidint_delay(void)//延时一段较长的时间{unsignedintm; }//{unsignedchari,j; }voidmain(void){unsignedchari;{{ //P1.0口的灯点亮int_delay();//延时一段较长的时间 }w {

wwwPLCworld //P1.4口的灯点亮 ();//}}}voidmain(void){unsignedchar //P1=103=01100111B,P1.3、P1.4、P1.7 }voidmain(void){unsignedcharm,n;unsignedints; 8P0w 256

wwwPLCworld //8P1P1=17=11H=00010001BP1.0P1.4 //8P0P3=192=c0H=11000000B,P3.1,P3.6,P3.7} voidmain(void){ P0=((36%5)*10)/5;//求小数 } voiddelay(void){unsignedinti;;}函数功能w {

wwwPLCworldunsignedchar { }} voidmain(void){ } voidmain(void){ } voidmain(void){w wwwPLCworld } voidmain(void){ } sbitF=P1^4; //将F位定义为P1.4sbit //XsbitY=P1^6; //将Y位定义为P1.6sbitZ=P1^7; //将Z位定义为P1.7voidmain(void){{;}} voiddelay(void){ww unsignedintn;;

wwwPLCworld}voidmain(void){unsignedchari;{{ //每次循环P1的各二进位右移1位，补0 }}} sbitS1=P1^4; //将S1位定义为P1.4sbit voidmain(void){{ }}w wwwPLCworld sbitS1=P1^4; //将S1位定义为P1.4voiddelay(void){unsignedintn;;}voidmain(void){unsignedchar { { } {case1 case2 case case w case case case }}} sbitsound=P3^7; //将sound位定义为P3.7voiddelay1600(void){unsignedcharn;;}voiddelay800(void){unsignedcharn;;}voidmain(void){ww {

wwwPLCworld{ //P3.7 //P3.7}{ //P3.7 //P3.7}}} voiddelay60ms(void){unsignedcharm,n;;}voidmain(void){unsignedcharw {

wwwPLCworld { //iP0delay60ms();//延时 }}} voiddelay60ms(void){unsignedcharm,n;;}voidmain(void){{ w //第六个LEDwwwPLCworld } voiddelay60ms(void){unsignedcharm,n;;}voidmain(void){unsignedcharunsignedcharcodeTab0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f定义无符{{}}}w wwwPLCworld voiddelay150ms(void){unsignedcharm,n;;}voidmain(void){unsignedcharstr[]={"Now,Temperatureis:"}; unsignedchar{ while(str[i]!='\0')//只要没有显示到结束标志'\0'{ }}}voidmain(void){unsignedchar*p1,*p2; unsignedchari,j; w wwwPLCworld }voiddelay150ms(void){unsignedchar;}voidmain(void){unsignedcharcodeTab[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};unsignedchar*p[]={&Tab[0],&Tab[1],&Tab[2],&Tab[3],&Tab[4],&Tab[5],unsignedchari; {{}}}w

wwwPLCworldvoiddelay150ms(void){unsignedcharm,n;;}voidmain(void){unsignedcharunsignedcharTab[unsignedchar*p; {{ //*（p+i)的值等于a[i] }}}w unsignedintsum(inta,intb){unsignedints;return}voidmain(void){unsignedz; //取得z的高8位P0=z%256;//z8位;}voiddelay(unsignedcharx){unsignedcharm,n;;}voidmain(void){w unsignedchar wwwPLCworld charcodeTab[{{ }{ }}}voiddelay(void){unsignedcharm,n;;}P08voidled_flow(unsignedchara[8]){unsignedchari;{w }}

wwwPLCworldvoidmain(void){ charcodeTab[}voiddelay(void){unsignedcharm,n;;}P08voidled_flow(unsignedchar*p形参为无符号字符型指针{unsignedchari;{ //将i置为0，指向数组第一个元素{P0=*(p+i);//取的指针所指变量（数组元素）P0w //调用延时wwwPLCworld }}}voidmain(void){ charcodeTab[ unsignedchar} unsignedcharcodevoiddelay(void){w

unsignedcharm,n;;

wwwPLCworldvoidled_flow(void){unsignedchari; {}}voidmain(void){void(*p)(void);//定义函数型指针，所指函数无参数，无返回值 //将函数的地址赋给函数型指针p } unsignedcharcodestr1TemperatureistestedbyDS18B20";//C语言中，字符串unsignedcharcodestr2[]="Nowtemperatureis:"; unsignedcharcodestr3[]="TheSystermisdesignedbyZhangSan";unsignedcharcodestr4[]="Thedateis2008-9-30";voiddelay(void){ww unsignedcharm,n;;}

wwwPLCworldP08voidled_display(unsignedchar*x[]) {unsignedchar{ { }}voidmain(void){unsignedchari;{;//}} voidmain(void){w wwwPLCworld}} voiddelay(void){unsignedcharm,n;;voidmain(void){ {P3=_crol_(P3,1);//将P3的二进制位循环左移1位后再赋给P3 }} ww ******************************w*Cwrdvoiddelay(void){unsignedcharm,n;;}voidmain(void){unsignedchari;{{}}#include<reg51.h>//51单片机寄存器定义的头文件#include<string.h>//包含函数isalpha（）的头文件voidmain(void){unsignedcharstr1[]="Now,Thetemperatureisunsignedcharstr2[]="Now,Thetemperatureis36Centgrade:";unsignedchari;if(i==0)//str1=str2 w }

wwwPLCworld defineF(a,b //带参数的宏定义，abvoid{unsignedchari,j,k; //ij+k参;voidmain(void){P3_0=0;//P3.0引脚置低电平，LED点亮P3_1=0;//P3.0引脚置低电平，LED点亮P3_2=0;//P3.0引脚置低电平，LED点亮P3_3=0;//P3.0引脚置低电平，LED点亮P3_4=1;//P3.4引脚置高电平，LED熄灭P3_5=1;//P3.5引脚置高电平，LED熄灭P3_6=1;//P3.7引脚置高电平，LED熄灭P3_7=1;//P3.7引脚置高电平，LED熄灭;}w wwwPLCworld #defineMAX100 voidmain(void){#ifMAX>80 //如果字符串100大于80 //P3口低四位LED点亮 } **中断、定时器********中断、定时器*********中断、定时器*********中断、定时器 voidmain(void){ //T0 //使用定时器T0的模式1 //定时器T0的高8位赋初值w wwwPLCworld { }} sbit voidmain(void){ //定时器T0中断允许 //使用定时器T1的模式1 //定时器T1的高8位赋初值 //定时器T1的高8位赋初值 //启动定时器T1{ //将P3.7引脚输出电平取反 //定时器T0的高8位赋初值 //定时器T0的高8位赋初值}}w wwwPLCworld sbit voidmain(void){ //定时器T0中断允许 //定时器T0的高8位赋初值 //定时器T0的高8位赋初值 //启动定时器T0{ { //按键S按下接地，电平为0} }} sbit voidmain(void){ ww LCo //使用定时器T0的模式2TH0=(65536-46083)/256;//定时器T0的高8位赋初 //T0;}voidTime0(void)interrupt1using0//“interrupt”函数为中断服务函数{ //按位取反操作，将P2.0引脚输出电平取反TH0=(65536-46083)/256T08位重新赋初值} sbit voidmain(void){ //使用定时器T0的模式2TH0=(65536-46083)/256;//定时器T0的高8位赋初值TL0=(65536-46083)%256;//定时器T0的高8位赋初值 //启动定时器T0 //0;}w wwwPLCworldvoidTime0(void)interrupt1using0//“interrupt”函数为中断服务函数{ { }} sbitsbit sbitsbit 定时器T1中断次 定时器T1中断次voidmain(void){ //使用定时器T1的模式1TH1=(65536-46083)/256;//定时器T1的高8位赋初值TL1=(65536-46083)%256;//定时器T1的高8位赋初值 //启动定时器T1 //0 //0;}w voidTime1(voidinterrupt3using0 函数为中断服务{ //Countor1自加1 //Countor2自加 { } { }} sbit voidmain(void){ //定时器T1的高8位赋初值 //定时器T1的高8位赋初值 //启动定时器T1;} voidTime1(void)interrupt3using0//“interrupt” w wwwPLCworld{ } sbitsound=P3^7; //将sound位定义为P3.7unsignedintC; #definel_dao262 #definel_re286 //将“l_re”宏定义为低音“2”的频率286Hz#definel_mi311 //将“l_mi”宏定义为低音“3”的频率311Hz#definel_fa349 //将“l_fa”宏定义为低音“4”的频率349Hz#definel_sao392 //将“l_sao”宏定义为低音“5”的频率392Hz#definel_la440 //将“l_a”宏定义为低音“6”的频率440Hz#definel_xi #definedao523 #definere587 //将“re”宏定义为中音“2”的频率587Hz#definemi659 //将“mi”宏定义为中音“3”的频率659Hz#definefa698 //将“fa”宏定义为中音“4”的频率698Hz#definesao784 //将“sao”宏定义为中音“5”的频率784Hz#definela880 //将“la”宏定义为中音“6”的频率880Hz#definexi987 //将“xi”宏定义为中音“7”的频率523H#defineh_dao1046 #defineh_re1174 //将“h_re”宏定义为高音“2”的频率1174Hz#defineh_mi1318 //将“h_mi”宏定义为高音“3”的频率1318Hz#defineh_fa1396 //将“h_fa”宏定义为高音“4”的频率1396Hz#defineh_sao1567 //将“h_sao”宏定义为高音“5”的频率1567Hz#defineh_la1760 //将“h_la”宏定义为高音“6”的频率1760Hz#defineh_xi1975 //将“h_xi”宏定义为高音“7”的频率1975Hzvoiddelay(){unsignedcharww ;}

wwwPLCworldvoidmain(void){unsignedchar intcode 0xff0xffunsignedcharcodeJP[w wwwPLCworld //T01（13位计数器 {

{ //可证明这是13位计数器TL05 //延时1个节拍单位 }}}voidTime0(void)interrupt1using1{ //P3.7 }w wwworlc sbit voiddelay30ms(void){unsignedcharm,n;;}voidmain(void){unsignedchar {};//} voidmain(void){ w } sbit voidmain(void){ TMOD=00001010B,T02，GATE { //INT0为低电平，T0; while(ui==1)//在INT0高电平期间，等待，计时; }} sbit w unsignedchar Cwo=voiddelay30ms(void){unsignedcharm,n;;}voidmain(void){unsignedchar {}}voidint0(void)interrupt0using0//0的中断编号为0{}w wwwPLCworld sbit voidmain(void){ }voidint0(void)interrupt0using0//0的中断编号为0{ } sbit voidmain(void){ //定时器T0的高8位赋初值 //定时器T0的高8位赋初值 //启动定时器T0w Cwo ;}voidTime0(void)interrupt1using0//"interrupt"函数为中断服务函{ //P1.4} sbit void{ //允许定时器T0中断 //定时器T0赋初值0 //定时器T0赋初值0 //先关闭T0}voidint0(void)interrupt0using0//0的中断编号为0{ //0 w wwwPLCworld } //unsignedcharcodeTab[]={0xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F};//流水灯控sbitvoiddelay(void){unsignedchar;}voidSend(unsignedchardat){ ; }voidmain(void){w unsignedchar wwwPLCworld {{ }}} unsignedcharcodeTab[voidSend(unsignedchardat){}voiddelay(void){unsignedcharm,n;;}w {

wwwPLCworldunsignedchar //SCON=01000000B，串口工作方式1 //PCON=00000000B，波特率9600TH1=0xfd;//根据规定给定时器T1赋初值TL1=0xfd;//根据规定给定时器T1赋初值 //启动定时器T1{ { //发送数据i }}} unsignedcharReceive(void){unsignedchar //为了接收下一帧数据，需将RI清0 //将接收缓冲器中的数据存于datreturndat;}voidmain(void){TMOD=0x20;//T1SCON=0x50;//SCON=01010000B1,允许接收w wwwPLCworldPCON=0x00;PCON=00000000BTH1=0xfd;//根据规定给定时器T1赋初值TL1=0xfd;//根据规定给定时器T1赋初值TR1=1;//启动定时器T1 {}} sbitp=PSW^0;unsignedcharcodeTab[voidSend(unsignedchardat){}voiddelay(void){unsignedcharm,n;;}w wwwPLCworldvoidmain(void){unsignedcharTMOD=0x20;//TMOD=00100000BT12SCON=0xc0;//SCON=11000000B，串口工作方式3,PCON=0x00;//PCON=00000000B，波特率9600TH1=0xfd;//根据规定给定时器T1赋初值TL1=0xfd;//根据规定给定时器T1赋初值 //启动定时器T1{ { //发送数据i }}} sbitp=PSW^0;unsignedcharReceive(void){unsignedchar //为了接收下一帧数据，需将RI清0 //将接收缓冲器中的数据存于dat{w

}

wwwPLCworldvoidmain(void){TMOD=0x20;//T1SCON=0xd0;//SCON=11010000B，串口工作方式1,允许接收（REN=1）PCON=0x00;//PCON=00000000B，波特率9600TH1=0xfd;//根据规定给定时器T1赋初值TL1=0xfd;//根据规定给定时器T1赋初值 //启动定时器T1 {}} unsignedcharcodeTab[voidSend(unsignedchardat){}voiddelay(void){unsignedcharww ;}

wwwPLCworldvoidmain(void){unsignedchar //SCON=01000000B，串口工作方式1 //PCON=00000000B，波特率9600TH1=0xfd;//根据规定给定时器T1赋初值TL1=0xfd;//根据规定给定时器T1赋初值 //启动定时器T1{ { //发送数据i }}} unsignedcharReceive(void){unsignedchar //为了接收下一帧数据，需将RI清0 //将接收缓冲器中的数据存于datreturndat;}w wwwPLCworldvoidmain(void){TMOD=0x20;//T1SCON=0x50;//SCON=01010000B，串口工作方式1,允许接收（REN=1）PCON=0x00;//PCON=00000000B，波特率9600TH1=0xfd;//根据规定给定时器T1赋初值TL1=0xfd;//根据规定给定时器T1赋初值TR1=1;//启动定时器T1 {}}*********数码管显示*****数码管显示数码管显示****************数码管显 void{ }w wwwPLCworld voiddelay(void){unsignedchari,j;;}voidmain(void){unsignedcharunsignedcharcode {{ //让P0口输出数字的段码92H }}} w void //延时函w 段时{unsignedchari,j;;}void{ { //P2.0引脚输出低电平，DS0 P2=0xfd //P2.1引脚输出低电平，DS1 //P2.2引脚输出低电平，DS2 //P2.3引脚输出低电平，DS3 }} void {unsignedchari;;}void{ {w Cworld P2=0xfd //P2.1引脚输出低电平，DS1 //P2.2引脚输出低电平，DS2 //P2.3引脚输出低电平，DS3 }} unsignedchari; unsignedint unsignedcharcodevoid{unsignedinti;;}函数功能：4位数的数码显示器显示w ******************************w*wrdc***********************voiddisplay(unsignedint{ P2=0xfd; //P2=11110111B，P2.3DS3接 }void { 1.085微秒=50000微秒=50 { }}w voidTime0(void)interrupt1using{

wwwPLCworld { //随机产生一个从0到32767的整再将其除以10，获得一个随机4位数，模拟检测结果 } } unsignedcharcodeunsignedcharint_time; unsignedcharsecond; void{unsignedchari;;}w voidDisplaySecond(unsignedchark)wwwPLCworld{ //P2.6DS6 //P2.7DS7 }void { 秒//=50000微秒=50 { }}voidinterserve(void)interrupt1using1{ int_time++; //每来一次中断,中断次数int_time自加1 //够20次中断,即1秒钟进行一次检测结果采样{ w second0秒等于60wwwPLCworld} } unsignedcharTab[ unsignedcharport[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};unsignedcharint_time;//中断次数计数变量unsignedcharsecond; unsignedcharminute; unsignedcharhour; void {unsignedcharj;;}voidDisplaySecond(unsignedchars){ //P2.6DS6 //P2.7DS7 w wwwPLCworld}voidDisplayMinute(unsignedcharm){ P2.3DS3 P2.4DS4 //P2.5DS5 }voidDisplayHour(unsignedcharh){ //P2.0DS0 //P2.1DS1 //P2.2DS2 }w wwwPLCworldvoidmain(void){ //允许T0中断 { }}voidinterserve(void)interrupt1using1 //usingTime0{{ }{ //分钟计数变量加1}w if(minute==60)wwwPLCworld{ }{ } } sbitS=P3^2 unsignedcharTab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; unsignedcharvoiddelay(void){unsignedcharj;;}voidDisplay(unsignedcharx)w wwwPLCworld{ //P2.6引脚输出低电平，DS6 //P2.7引脚输出低电平，DS7 }voidmain(void){ }voidint0(void)interrupt0using0//0的中断编号为0{} w {

wwwPLCworld //将数字5的段码送P0口 //将数字9的段码送P1口 ;} **键盘控制*********键盘控制***************键盘控制 *****键盘控制 sbitS1=P1^4; //将S1位定义为P1.4引脚sbitLED0=P3^0; //将LED0位定义为P3.0引脚voidmain(void) { //P3.0{ //P3.0}} w wwwPLCworldsbit sbit voiddelay(void){unsignedchari,j;;}voidmain(void) { //P3.0{ {delay();//延时一段时间再次检测 //按键S1的确被按下 //P3.0}}}#include<reg51.h>//51sbitS1=P1^4; sbitS2=P1^5; sbitS3=P1^6; sbitS4=P1^7; unsignedcharkeyval;//按键值voidled_delay(void)w }

unsignedchari,j;;

wwwPLCworldvoiddelay30ms(void){unsignedchari,j;;}voidforward(void){ }ww ******************************w*Cwrdvoidbackward(void){ }voidstop(void){}voidflash(void){}voidkey_scan(void){ ww wwwPLCworldcn //按键S1被按下 }}voidmain(void) { {{casecase3:stop();case4:flash();}}} sbitS1=P1^4; //将S1位定义为P1.4引脚ww sbitS2=P1^5; LCwsbitS3=P1^6; //将S3位定义为P1.6引脚sbit unsignedcharkeyval;//按键voidled_delay(void){unsignedchari,j;;}voiddelay20ms(void){unsignedchari,j;;}voidforward(void){ w }voidbackward(void){ }voidstop(void){ }voidflash(void){ w wwwPLCworld}voidmain(void) { //使用定时器T0的模式1 {{casecase3:stop();case4:flash();}}}voidTime0_serve(void)interrupt1using1{ { //按键S1被按下w

}} unsignedchar sbit //S1sbit sbit sbit voiddelay20ms(void) {unsignedchari,j;;}voiddelay(unsignedcharx){unsignedchark;}ww ******************************w*Cwrdcvoidmain(void){ //使用定时器T0的模式2 { }}voidintersev(void)interrupt1using1{ { { w //如果是按键S3按下 //如果是按键S4按下 }} } unsignedchar sbit //S1voiddelay(void) {unsignedchari,j;;}voidmain(void){ //使用定时器T0的模式2 w{

wwwPLCworld{case0:case1:P3=0xfd;case2:P3=0xfb;case3:P3=0xf7;}}}voidintersev(void)interrupt1using1{ { //延时20ms，软件消抖 //如果是按键S1按} } unsignedcharcodeTab[w wwwPLCworldunsignedcharint_time;//中断次数计数变量unsignedcharsecond; unsignedcharminute; unsignedcharhour; sbit sbit sbit sbit voiddelay(void){unsignedcharj;;}voiddelay60ms(void){unsignedchari,j;;}voidDisplaySecond(unsignedchars){ //P2.6DS6 //P2.7DS7 w //关闭所有数wwwPLCworld}voidDisplayMinute(unsignedcharm){ P2.3DS3 P2.4DS4 //P2.5DS5 }voidDisplayHour(unsignedcharh){ //P2.0DS0 //P2.1DS1 //P2.2DS2 }w {

wwwPLCworld //P14 { { { }}}}void{ //允许T0中断 //启动定时器T0 {w ol; }}voidinterserve(void)interrupt1using1 //usingTime0{ //中断次数加1 { } { } { //小时计数变量加1} { } //定时器T0高四位赋值 //定时器T0低四位赋 }w sbit sbit sbit unsignedchar unsignedchar 函数功能：软件消抖延时（voiddelay(void){unsignedchari,j;;}voidunsignedinti;;}voidforward(){ }voidbackward()w

wwwPLCworld}voidstop(void){P0=0xff }void { {case case //S2case }}}w *******************wwPolc*********voidTime0_serve(void)interrupt1using1{ { { }} //定时器T0的高8位赋初值 //启动定时器T0}#include<reg51.h>//51sbitP14=P1^4; sbitP15=P1^5; sbitP16=P1^6; sbit //将P17位定义为P1.7引unsignedcharcodeTab[unsignedchar voidled_delay(void){unsignedcharj;w }

wwwPLCworldvoiddisplay(unsignedchark){ }voiddelay20ms(void){unsignedchari,j;;}voidmain(void){ //使用定时器T0的模式1TH0=(65536-500)/256;//定时器T0的高8位赋初值TL0=(65536-500)%256;//定时器T0的高8位赋初值 //启动定时器T0 { }}w 0的中断服务子wwPLCworldnvoidtime0_interserve(void)interrupt1using1 //定时T0的中断编1，{ {

//第一行置为低电平“0”（P1.0

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w/w/wPLCworldn到接P1.5引脚的列线为低电

} } sbit voiddelay_sound(void){unsignedchari;;}voiddelay20ms(void)w }

unsignedchari,j;;

wwwPLCworldvoidmain(void){ //使用定时器T0的模式1TH0=(65536-500)/256;//定时器T0的高8位赋初值TL0=(65536-500)%256;//定时器T0的高8位赋初值 //启动定时器T0 ;}voidtime0_interserve(void)interrupt1using1 {unsignedchar { //P3.7{}} w 08位赋初 } sbitP14=P1^4; sbitP15=P1^5; sbitP16=P1^6; sbitP17=P1^7; unsignedcharkeyval;//定义变量按键值sbit unsignedint unsignedint #definel_dao #definel_re286 //将“l_re”宏定义为低音“2”的频率286Hz#definel_mi311 //将“l_mi”宏定义为低音“3”的频率311Hz#definel_fa349 //将“l_fa”宏定义为低音“4”的频率349Hz#definel_sao392 #definel_la440 //将“l_a”宏定义为低音“6”的频率440Hz#definel_xi494 //将“l_xi”宏定义为低音“7”的频率494Hz#definedao523 #definere587 //将“re”宏定义为中音“2”的频率587Hz#definemi659 //将“mi”宏定义为中音“3”的频率659Hz#definefa698 //将“fa”宏定义为中音“4”的频率698Hz#definesao784 //将“sao”宏定义为中音“5”的频率784Hz#definela880 //将“la”宏定义为中音“6”的频率880Hz#definexi987 //将“xi”宏定义为中音“7”的频率53#defineh_dao1046 #defineh_re1174 //将“h_re”宏定义为高音“2”的频率1174Hz#defineh_mi1318 //将“h_mi”宏定义为高音“3”的频率1318Hz#defineh_fa1396 //将“h_fa”宏定义为高音“4”的频率1396Hz#defineh_sao1567 //将“h_sao”宏定义为高音“5”的频率1567Hzw #defineh_la //将“h_la”wwwPLCworldcn高音“6”的频率#defineh_xi voiddelay20ms(void){unsignedchari,j;;}voiddelay(){unsignedchari,j;;}voidOutput_Sound(void){ //可证明这是13位计数器TH0高8位的赋初值方法 //可证明这是13位计数器TL0低5位的赋初值方法 //开定时T0 }voidmain(void){w //开总中断wwwPLCworld //定时器T1启动，开始键盘扫描 //分别使用定时器T1的模式1，T0的模式0 //定时器T1的高8位赋初值 //定时器T1的高8位赋初值 {{

case case w

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case case case }}voidTime0_serve(void)interrupt1using{ww //wwwPLCworldcn13位计数TH08位的赋初值 //可证明这是13位计数器TL0低5法 //P3.7}voidtime1_serve(void)interrupt3using2 第2组寄存器{ { {w

//如果检测到接P1.4 检测到接P1.6引脚的列 断是S7键被按下 测到接P1.7引脚的列 断是S8键被按下 （P1.2if(P14==0) 接P1.4引脚的列线 是S9键被按下 测到接P1.5引脚的列线 是S10键被按下 到接P1.6引脚的列线 S11键被按下 到接P1.7引脚的列线 S12键被按下

//如果检测到接P1.4引脚的列线为低} }w wwwPLCworld sbitP14=P1^4; //将P14位定义为P1.4引脚sbitP15=P1^5; //将P15位定义为P1.5引脚sbitP16=P1^6; //将P16位定义为P1.6引脚sbitP17=P1^7; //将P17位定义为P1.7引脚sbitsound=P3^7; //将sound位定义为P3.7unsignedcharkeyval; voiddelay(void){unsignedchari;;}voiddelay20ms(void){unsignedchari,j;;}voidmain(void){unsignedcharD[]={0,8,0,8,7,4,11}; //设定 //使用定时器T0的模式1TH0=(65536-500)/256;//T08位赋初值TL0=(65536-500)%256;//T08w //第一位输入不正确，等; //第二位输入不正确，等; //第三位输入不正确，等; //第四位输入不正确，等; //第五位输入不正确，等; //第六位输入不正确，等; ; }voidtime0_interserve(void)interrupt1using1 //定时T0的中断编1，{unsignedchar{//第一行置为低电平“0”（P1.0wwLC

//如果检测到接P1.4引脚的列线为低w }}

wwwPLCworld }******************液晶显示LCD*********液晶显示*****LCD******************** sbitRS=P2^0; sbitRW=P2^1; //读写选择位，将RW位定义为P2.1引脚sbitE=P2^2; //使能信号位，将E位定义为P2.2引脚sbitBF=P0^7; voiddelay1ms(){unsignedcharw ;}

wwwPLCworldvoiddelay(unsignedcharn){unsignedchari;}unsignedcharBusyTest(void){bit //根据规定，RS为低电平，RW //将忙碌标志电平赋给result}voidWriteInstruction(unsignedchardictate){);// //E01w

wwwPLCworld //E //E由高电平跳变成低电平时，液晶模块开始}voidWriteAddress(unsignedcharx){}voidWriteData(unsignedchary){ //RS为高电平，RW //E01发生正跳变，所以应先置 //E置高电平w //wwwLCworldcn }voidLcdInitiate(void){ //显示模式设置：16×2显示，5×7点阵，8位数据 }void { //调用LCD初始化函数 } sbitRS=P2^0; sbitRW=P2^1; //读写选择位，将RW位定义为P2.1引脚sbitE=P2^2; //使能信号位，将E位定义为P2.2引脚sbitBF=P0^7; w ]={"Welcow voiddelay1ms(){unsignedchari,j;;}voiddelay(unsignedcharn){unsignedchari;}unsignedcharBusyTest(void){bit //根据规定，RS为低电平，RW //将忙碌标志电平赋给result}w {);// //E01

//E //E由高电平跳变成低电平时，液晶模块开始}voidWriteAddress(unsignedcharx){}voidWriteData(unsignedchary){ //RS为高电平，RW //E01发生正跳变，所以应先置w orldcn //E置高电平 }voidLcdInitiate(void){ //显示模式设置：16×2显示，5×7点阵，8位数据 }void {unsignedchar { //设置显示位置为第一行的第5个字i=while(string[i]!=w }}} sbit sbitRW=P2^1; //读写选择位，将RW位定义为P2.1引脚sbitE=P2^2; //使能信号位，将E位定义为P2.2引脚sbitBF=P0^7; unsignedcharcodedigit[]={" "};//定义字符数组显示数字unsignedcharcodestringTestResult定义字符数组显示提示信息voiddelay1ms(){unsignedchari,j;;}voiddelay(unsignedcharn){ww unsignedchari;

wwwPLCworld}unsignedcharBusyTest(void){bit //根据规定，RS为低电平，RW //将忙碌标志电平赋给result //E}voidWriteInstruction(unsignedchardictate){);// //E01 //Ew

wwwPLCworld //E由高电平跳变成低电平时，液晶模块开始}voidWriteAddress(unsignedcharx){}voidWriteData(unsignedchary){ //RS为高电平，RW //E01发生正跳变，所以应先置 //E置高电平 }voidLcdInitiate(void){ w //显示wwwPLCworldcn16×2显示，5×7点阵，8位数 ，给硬件一点反应时 }voidmain(void){unsignedchar unsignedint unsignedcharD1,D2,D3,D4,D5; //从第1行第3列开始显示i while(string[i]!={ } { //从第2行第6列开始显示 w 的字符常量写入 //将小数点的字符常量写入LCD //延时1s（每1s一次数据） //延时250ms}} sbitRS=P2^0; sbitRW=P2^1; //读写选择位，将RW位定义为P2.1引脚sbitE=P2^2; //使能信号位，将E位定义为P2.2引脚sbitBF=P0^7; unsignedcharcodedigit unsignedcharcodestring[]={"BeiJingTime"};//定义字符数组显示提示信息unsignedcharcount; unsignedchar voiddelay1ms(){unsignedchari,j;;}voiddelay(unsignedcharn){unsignedchari;w wwwPLCworld}unsignedcharBusyTest(void){bit //根据规定，RS为低电平，RW //将忙碌标志电平赋给result //E}voidWriteInstruction(unsignedchardictate){);// //E01发生正跳变，所以应先置 //E w //wwEwPLCworldcn平跳变成低电平时，液晶模块}voidWriteAddress(unsignedcharx){}voidWriteData(unsignedchary){ //RS为高电平，RW //E01发生正跳变，所以应先置 //E置高电平 }voidLcdInitiate(void){ //显示模式设置：16×2显示，5×7点阵，8位数据 ，给硬件一点反应时ww

wwwPLCworld }void{unsignedchar //写显示地址，将十位数字显示在第2行第5列 //将十位数字的字符常量写入LCD //将个位数字的字符常量写入LCD}void{unsignedchar //写显示地址，将十位数字显示在第2行第8列 //将十位数字的字符常量写入LCD //将个位数字的字符常量写入LCD}w wwwPLCworldvoid{unsignedchar //写显示地址，将十位数字显示在第2行第11列 //将十位数字的字符常量写入LCD //将个位数字的字符常量写入LCD}*mainvoid{unsignedchar //使用定时器T0的模式1 //定时器T0的高8位设置初值 //定时器T0的低8位设置初值 {w //ww } //写地址，将第二个分号显示在第2行第7列 //将分号的字符常量写入LCD //将分号的字符常量写入LCD { }}{ //如果中断次数计满20次{ } { } { } { }w

wwwPLCworld 红外#include #include #defineOP_READ //器件地址以及操作,0xa1即为10100001B#defineOP_WRITE0xa0 //器件地址以及写入操作,0xa1即为10100000BsbitSDA=P3^4; //将串行数据总线SDA位定义在为P3.4引脚sbit voiddelay1ms(){unsignedchari,j;;}voiddelaynms(unsignedcharn){w

unsignedchari;wwwPLCworldvoidstart()//{SDA //SDASCL SDA //SDA SCL=0; //SCL为低电平时，SDA上数据才允许变化(即允许以后的数据传}voidstop()//{SDA //SDA初始化为低电平“0”SCL SDA //SDA }w ******************************w*wrdc************/unsignedchar//AT24Cxx{unsignedcharunsignedchar for(i=0;i<8;{SCL //SCL //xx|=(unsigned 中SCL } }参数：y(待写入的数据）bitWriteCurrent(unsignedchary){unsignedcharbit for(i0i8 //8{SDA= 数据送到 后 SCL SCL=0; y //y}SDA=1; 发送设备（主机）应在时钟脉冲的高电平期间(SCL=1)释放SDA线， w SCL= //根据上述规定 高电 ack_bitSDA;接受设备（AT24Cxx)SDA送低电平，表示已经接收到一个SCL=0; //AT24Cxx}参数：add(指定的地址）；dat(待写入的数据voidWriteSet(unsignedcharadd,unsignedchardat)//addr{ //11ms,1ms}出口参数：x(读出的数据）unsignedcharReadCurrent(){unsignedchar 据 }w wwwPLCworldunsignedcharReadSet(unsignedcharset_addr)//在指定地址{ }{SDA=1; SCL=1; //从指定地址“0x36中数据并送P1口显示} sbitRS=P2^0; //寄存器选择位，将RS位定义为P2.0引脚sbitRW=P2^1; //读写选择位，将RW位定义为P2.1引脚sbitE=P2^2; //使能信号位，将E位定义为P2.2引脚sbitBF=P0^7; //忙碌标志位，，将BF位定义为P0.7引脚sbitS=P1^4; //将S位定义为P1.4引脚#defineOP_READ //器件地址以及操作,0xa1即为10100001B#defineOP_WRITE0xa0//器件地址以及写入操作,0xa110100000BsbitSDA=P3^4; sbitSCL=P3^3; //将串行时钟总线SDA位定义在为P3.3引脚unsignedcharcodedigit[]={" "};//定义字符数组显示数字w (3j+2)*i=(3×33+2)×10=1010(微秒 是1毫voiddelay1ms(){unsignedchari,j;;}voiddelaynms(unsignedcharn){unsignedchari;}unsignedcharBusyTest(void){bit //根据规定，RS为低电平，RW //将忙碌标志电平赋给result //E}w wwwPLCworldvoidWriteInstruction(unsignedchardictate){ //E01 //E //E由高电平跳变成低电平时，液晶模块开始}voidWriteAddress(unsignedcharx){}voidWriteData(unsignedchary){ //RS为高电平，RW w // 1发生正跳变，所以应先置 //E置高电平 }voidLcdInitiate(void){ //显示模式设置：16×2显示，5×7点阵，8 ，给硬件一点反应时 }voidDisplay(unsignedcharx){unsignedchar //写显示地址，将十位数字显示在第2行第5列w //将十ww }voidstart()//{SDA //SDASCL SDA //SDA SCL=0; //SCL为低电平时，SDA上数据才允许变化(即允许以后的数据传}voidstop()//{SDA //SDA SCL SDA //SDA}ww

wwwPLCworldunsignedcharReadData()//AT24Cxx{unsignedcharunsignedchar for(i=0;i<8;{SCL //SCL //xx|=(unsigned 中SCL } }参数：y(待写入的数据）bitWriteCurrent(unsignedchary){unsignedcharbit for(i0i8 //8{SDA= 数据送到 后 SCL SCL=0; y //y}SDA=1; 发送设备（主机）应在时钟脉冲的高电平期间(SCL=1)释放SDA线，w //等待一个wwwPLCworld SCL //根据上述规定，SCL ack_bitSDA;接受设备（AT24Cxx)SDA送低电平，表示已经接收到一个SCL=0; //AT24Cxx}参数：add(指定的地址）；dat(待写入的数据voidWriteSet(unsignedcharadd,unsignedchardat)//addr{ //11ms,1ms}出口参数：x(读出的数据）unsignedcharReadCurrent(){unsignedchar 据 }w 函数功能：从AT24Cxx中的指定地wwwPLCworldunsignedcharReadSet(unsignedcharset_add)//在指定地址{ }*void{unsignedchar unsignedchar //调用LCD初始化函数 { { //确实该键被按下 } //从AT24C02中读出计件值 }}w #include #include #defineOP_READ10xa1 //器件1地址以及操作,0xa1即为1010#defineOP_WRITE10xa0//器件1地址以及写入操作,0xa1即为10100000B#defineOP_READ20xaf//器件2地址以及操作,0xa1即为10101111B#defineOP_WRITE20xae//器件2地址以及写入操作,0xa1即为10101110BsbitSDA=P3^4; //将串行数据总线SDA位定义在为P3.4引脚sbit voiddelay1ms(){unsignedchari,j;;}voiddelaynms(unsignedcharn){unsignedchari;}voidstart()//{SDA //SDASCL SDA //SDA w //等待一个机器wwwPLCworld SCL=0; //SCL为低电平时，SDA上数据才允许变化(即允许以后的数据传 }voidstop()//{SDA //SDA SCL SDA //SDA}unsignedcharReadData()//AT24Cxx{unsignedcharunsignedchar //从AT24Cxx中读出