第二章任务一：闪烁广告灯的设计利用89c51单片机的端口控制两个LED（D0和D1），编写程序，实现两个LED互闪。#include#defineuintunsignedint#defineucharunsignedcharsbitLED1=P0^0;sbitLED2=P0^1;voiddelayms(uintms){uinti;while(ms--){for(i=0;i<120;i++);}}voidmain(){while(1){LED1=0;LED2=1;delayms(500);LED1=1;LED2=0;delayms(500);}}任务二：流水广告灯的设计利用89c51单片机的端口控制8个LED（D0~D7）循环点亮，刚开始时D0点亮，延时片刻后，接着D1点亮，然后依次点亮D2->D3->D4->D5->D6->D7，然后再点亮D7->D6->D5->D4->D3->D2->D1->D0，重复循环。#include#include#defineuintunsignedint#defineucharunsignedcharuinti;uchartemp;uinta[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};voiddelayms(uintms){while(ms--){uintj;for(j=0;j<120;j++);}}voidmain(){while(1){P0=0xfe;while(P0!=0x7f){//P1=temp;//delayms(500);P0=_crol_(P0,1);delayms(250);}temp=0x7f;while(P0!=0xfe){P0=temp;delayms(500);temp=_cror_(temp,1);}}}任务三：拉幕式与闭幕式广告灯的设计利用89c51单片机的P0端口实现8个LEDD0~D7的拉幕式与闭幕式广告灯设计。拉幕式：开始D0~D7全灭，延时片刻后首先D3和D4亮，其次是D2和D5亮，再是D1和D6亮，最后是D0和D7亮。闭幕式：开始D0~D7全亮，延时片刻后首先D0和D7灭，其次是D1和D6灭，再是D2和D5灭，最后是D3和D4灭。#include#defineuintunsignedint#defineucharunsignedcharucharcodetable[]={0xe7,0xc3,0x81,0x00};voiddelay(uintx){uinti,j;for(i=x;i>0;i--)for(j=120;j>0;j--);}voidmain(){uinti;while(1){P1=0xff;delay(500);for(i=0;i<4;i++){P1=table[i];delay(500);}for(i=3;i>0;i--){P1=table[i-1];delay(500);}}}任务四：复杂广告灯的设计利用89c51单片机的端口实现8个LED（D0~D7）复杂广告灯的控制，要求显示规律为：正向流水->反向流水->隔灯闪烁3次->高四盏、低四盏闪烁2次->隔两盏闪烁3次，再重复循环。#include#defineuintunsignedint#includevoiddelayms(uintms){uinti;while(ms--){for(i=0;i<110;i++);}}voidmain(){uinti,j,xx[2]={0xaa,0xff},yy[2]={0xf0,0x0f},zz[2]={0xb6,0xff};unsignedcharaa;while(1){aa=0xfe;for(i=0;i<7;i++){P0=aa;aa=_crol_(aa,1);delayms(500);}for(i=0;i<8;i++){P0=aa;aa=_cror_(aa,1);delayms(500);}for(i=0;i<3;i++)for(j=0;j<2;j++){P0=xx[j];delayms(500);}for(i=0;i<2;i++)for(j=0;j<2;j++){P0=yy[j];delayms(500);}for(i=0;i<3;i++)for(j=0;j<2;j++){P0=zz[j];delayms(500);}}}任务五：单个LED数码管显示设计使用89c51的P0口作为输出口，外接LED数码管，编写程序，使数码管循环显示从0~9的加1计数。#include#defineuintunsignedint#defineucharunsignedcharuchartable[10]={0XC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,0X90};uintkey=0;voidint_int(){EA=1;IT0=1;EX0=1;}voidcount_num()interrupt0{if(key==9)key=0;elsekey++;}voidmain(){int_int();while(1){P0=table[key];}}任务六：多个LED数码管显示设计使用单片机P0和P2口作为输出口，外接一个8位LED数码管，编写程序，使数码管显示“872AF635”。#include#include#defineuintunsignedint#defineucharunsignedchardelay(ms){while(ms--){inti;for(i=0;i<110;i++);}}main(){uchara[16]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};ucharb[8]={0x08,0x07,0x02,0x0a,0x0f,0x06,0x03,0x05},j;uinti;while(1){j=0x01;for(i=0;i<8;i++){P2=j;P0=a[b[i]];j=_crol_(j,1);delay(3);}}}任务七：查询式按键设计将8个按键从1~8进行编号，如果其中一个键被按下，则在LED数码管上显示相应的键值。#include#defineuintunsignedint#defineucharunsignedcharmain(){uchara[16]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};P0=0xff;while(P0!=0xff){switch(P0){ca...
