辽宁科技大学单片机考试题库.doc

1 第一题#include sbit P1_0=P10;sbit P1_1=P11;sbit P1_2=P12;sbit P1_3=P13;sbit P1_7=P17;unsigned char ID;void delayms(unsigned char i) unsigned char j; for(i;i0;i-) for(j=1000;j0;j-);void main(void) while(1) if(P1_7=0) delayms(100); if(P1_7=0) ID+; if(ID=4) ID=0; while(P1_7=0); switch(ID) case 0: P1_0=P1_0;P1_1=1;P1_2=1;P1_3=1; delayms(100); break; case 1: P1_1=P1_1;P1_0=1;P1_2=1;P1_3=1; delayms(100); break; case 2: P1_2=P1_2;P1_0=1;P1_1=1;P1_3=1; delayms(100); break; case 3: P1_3=P1_3;P1_0=1;P1_1=1;P1_2=1; delayms(100); break; 2. 串行通信#include #include #define uchar unsigned charuchar code Table18=1,3,7,0x0f,0x1F,0x3F,0x7F,0xff,0xFE, 0xFC,0xF8,0xF0,0xE0,0xC0,0x80,0,0xFF,00;void Delay(unsigned int time);void main()unsigned int i,a; TMOD=0x20; TL1=0xF4; TH1=0xF4; TR1=1; PCON=0x00; SCON=0x50; while(1) for(i=0;i18;i+) SBUF=Tablei; while(TI!=1); /*发送数据完成标志*/ TI=0; /*清除发送标志*/ while(RI!=1); /*接收到数据标志*/ RI=0; /*清除接收标志*/ a=SBUF;/*接收数据*/ P1=a; Delay(200); /*彩灯状态保持一段时间*/ void Delay(unsigned int x)uchar i; while(x-) for(i=0;i125;i+) ; 3.五人表决器 #include sbit RST = P17;sbit K1 = P10;sbit K2 = P11;sbit K3 = P12;sbit K4 = P13;sbit K5 = P14;sbit led= P16;unsigned char count;void delay(unsigned k)unsigned int i,j;for(i=0;ik;i+)for(j=0;j=3) led=led; delay(200); if(RST=0) delay(40); if(RST=0) count=0; P1=0xFF; 4.A/D转换 法一#include #include #define CS273 XBYTE0xCFA0 #define IN7 XBYTE0xCFAFvoid Delay(int U);void Display();unsigned char code table17=0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,0x00;unsigned BUF2=0,0;unsigned char k,sn;void main()unsigned char i; IE=0x81;IT0=1; while(1) IN7=i; sn=1; while(sn); Display(); void INT_0(void) interrupt 0 k=IN7;sn=0;void Display() unsigned char i,j; BUF0=k/16; BUF1=k%16; while(j-) CS273=tableBUF0; P1=0xFE; Delay(2); CS273=tableBUF1; P1=0xFD; Delay(2); void Delay(int U) unsigned char i; while(U-) for(i=0;i62;i+) ; A/D 法二/*文件名：sy8.c*版 本：V1.0_C*功 能：AD0809通道0采集数据，并有四个数码管显示*注 意：实验时，拔掉LED_JUMP跳帽*创 建：吴文波*/#include #include #define AD0809_0 XBYTE0xCFA0#define CS273 XBYTE0xCFA8/*分别控制4位数码管的位码*/sbit P10=P10;sbit P11=P11;sbit P12=P12;sbit P13=P13;/*共阴极数码管显示数据:0-9 A-F 黑屏*/table17=0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F, 0x77,0x7C,0x39,0x5E,0x79,0x71,0x00;unsigned char dispbuf4;unsigned char sn;unsigned int idata BUF8;/*函数名：INIT0_FUNC*功 能：外部中断0服务函数，实现AD0809通道0数据采集*输 入：无*返 回：AD0809通道0数据*/void INIT0_FUNC(void) interrupt 0 BUF0=AD0809_0; sn=0;/*函数名：Delay*功 能：Delay实现延时约1ms*temp(晶振6M)* for循环执行一次需：(12*(1/6M)*8s*输 入：延时时间 temp*返 回：无*/void Delay(unsigned char temp)unsigned int j;while(temp-) for(j=0;j62;j+); /*函数名：Display*功 能：进行AD0809通道0数据的显示*输 入：k-AD0809通道0、BUFk-AD0809通道0数据*返 回：无*/void Display(unsigned char k)unsigned int t,j=10; while(j-) t=(double)BUFk/255*500;/? dispbuf0=t%10; dispbuf1=t/10%10; dispbuf2=t/100%10; dispbuf3=t/1000; P10=0; /*第1位数码管位选通*/ P11=1; P12=1; P13=1; CS273=tabledispbuf0; /*第1位数码管段码*/ Delay(2); P10=1; P11=0; /*第2位数码管位选通*/ P12=1; P13=1; CS273=tabledispbuf1; /*第2位数码管段码*/ Delay(2); P10=1; P11=1; P12=0; /*第3位数码管位选通*/ P13=1; CS273=tabledispbuf2|0x80; /*第3位数码管段码*/ Delay(2); P10=1; P11=1; P12=1; P13=0; /*第4位数码管位选通*/ CS273=tabledispbuf3; /*第4位数码管段码*/ Delay(2); /*函数名：INIT0Init*功 能：外部中断0初始化*输 入：无*返 回：无*/void INIT0Init()IT0=1;EX0=1;EA=1;/*函数名：main主函数*功 能：实现AD0809采集通道0数据并由4位数码管显示其值*说 明：无*/void main(void)INIT0Init(); /*外部中断0初始化*/ while(1) AD0809_0=0; /*启动通道0采集*/ sn=1; while(sn); Display(0); /*AD0809通道0数据显示*/ 5. 抢答器（加数码管和LED灯） #include #include #define cs273 XBYTE0xCFA0sbit RST = P17;sbit K1 = P10;sbit K2 = P11;sbit K3 = P12;sbit P1_6=P16;sbit led1=P13;sbit led2=P14;sbit led3=P15;unsigned char code table4=0x06,0x5b,0x4f,0x3f;void delay(unsigned k)unsigned int i,j;for(i=0;ik;i+)for(j=0;j62;j+);main() while(1) start: P1_6=0; if(K1=0) delay(30); if(K1=0) cs273=table0;led1=0;led2=1;led3=1;while(1)if(RST=0)led1=1;led2=1;led3=1;cs273=table3;goto start; else if(K2=0) delay(30); if(K2=0) cs273=table1;led1=1;led2=0;led3=1;while(1)if(RST=0)led1=1;led2=1;led3=1;cs273=table3;goto start; else if(K3=0) delay(30); if(K3=0) cs273=table2;led1=1;led2=1;led3=0;while(1)if(RST=0)led1=1;led2=1;led3=1;cs273=table3;goto start; 6. 跑马表#include #include #define CS273 XBYTE0xcfa0sbit SP1=P17;unsigned char code table=0x3f,0x06,0x5b,0x4f,0x66, 0x6d,0x7d,0x07,0x7f,0x6f;unsigned char count,keycnt,second;void delay(unsigned char i) unsigned j; for(i;i0;i-) for(j=62;j0;j-);void Timer0_INTI() TMOD=0x01; TH0=(65536-10000)/256; TL0=(65536-10000)%256; TR0=0; ET0=1; EA=1; void Timer0() interrupt 1 using 0 TH0=(65536-1000)/256; TL0=(65536-1000)%256; count+; if(count=100) second+; if(second=60) second=0; void main(void) Timer0