目录
1.步进电机控制电路设计
所需元件：
74ls04，at89c51，cap，cap-elec，crystal，motor-stepper，res，uln2003a，74ls04。
例图：
编辑
例图代码：
#include<AT89X52.H> void mdelay(unsigned int delay) { unsigned int i; for(;delay>0;delay--) for(i=0;i<124;i++); } void main() { while(1) { P1=0x03; //0运行,0011,取反1100，a，b mdelay(50); P1=0x06; mdelay(50); P1=0x0C; mdelay(50); P1=0x09; mdelay(50); } }
2.车灯控制
所需元件：
at89c51，cap，cap-elec，27n5771，crysal，led-red，res，respack-8，sw-rot-3
例图：
编辑
例图代码：
#include<REG52.H> sbit LEDL1=P2^0; sbit LEDL2=P2^1; sbit LEDR1=P2^2; sbit LEDR2=P2^3; sbit S1=P1^0; sbit S2=P1^1; void delay(unsigned int i) { while(i--); } void main() { while(1) { P1=0xff; LEDL1=S1; LEDL2=S1; LEDR1=S2; LEDR2=S2; delay(20000); LEDL1=1; LEDL2=1; LEDR1=1; LEDR2=1; delay(20000); } }
3. 0-59倒计时
所需元件：
7SEG-MPX2-CC,74LS245,AT89C51-CAP,CAP-ELEC,CRYSTAL,RES,RESPACK-7
例图：
编辑
例图代码：
#include<AT89X52.h> #include<absacc.h> unsigned char code Tab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6D,0x7D,0x07,0x7f,0x6f,0x77,0x7c}; unsigned char Dat[]={0,0,0,0,0,0}; unsigned char Second,t; void Delay() { unsigned char i; for(i=0;i<250;i++); } void main() { EA=1; ET0=1; TMOD=0x01; TH0=(65536-50000)/256; TL0=(65536-50000)%256; TR0=1; while(1) { Dat[0]=Second/10; Dat[1]=Second%10; P0=Tab[Dat[0]]; P1=0xfe; Delay(); P1=0xff; P0=Tab[Dat[1]]; P1=0xfd; Delay(); P1=0xff; } } void intserv1 (void) interrupt 1 using 1 { TH0=(65536-50000)/256; TL0=(65536-50000)%256; t++; if(t==20) { t=0; Second++; if(Second>=60) Second=0; } }
4.定时器，计数器--弥红灯
所需元件：
AT89C51,CAP,CAP-ELEC,CRYSTAL,LED-BARGRAPH-RED,LED-BIBY,RES
例图：
编辑
例图代码：
#include<reg52.h> unsigned char i10,i8,i6; unsigned char mod1,mod2; bit F; void main(void) { i10=10; i8=8; i6=6; mod1=0x01; mod2=0xAA; F0=0; TMOD=0x10; TH1=0x3C; TL1=0xB0; IE=0x88; TR1=1; while(1); } void timer0(void) interrupt 3 using 1 { TH1=0x3C; TL1=0xB0; i10--; if(i10==0) { i10=10; if(F==0) { P1=~mod1; mod1=mod1<<1; i8--; if(i8==0) { i8=8; F=1; mod1=0x01; } } else { P1=mod2; mod2=~mod2; i6--; if(i6==0) { i6=6; F=0; } } } }
5.矩形键盘
所需元件：
7SEG-COM-CATHODE,74LS21,AT89C51,BUTTIN,CAP,
CAP-ELEC,CRYSTAL,RES,74LS21
例图：
编辑
例图代码：
/*#include<AT89X52.H> unsigned char table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d, 0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; void delay10ms(void) { unsigned char i,j; for(i=20;i>0;i--) for(j=248;j>0;j--); } unsigned char scan_key(void) { unsigned char scan,col,rol,tmp; bit flag=0; scan=0xef; for(col=0;col<4;col++) { P0=scan; tmp=~P0; tmp=tmp&0x0f; for(rol=0;rol<4;rol++) { if(tmp==(0x01<<rol) ) { flag=1; break; } } if(flag==1) { while(tmp!=0x0f) { P0=0x0f; tmp=P0; } break; } scan=(scan<<1)+1; } return(rol*4+col); } /*void key_led(void) interrupt 0 { unsigned char tmp,key; delay10ms(); P0=0x0f; tmp=P0; if(tmp!=0x0f) { key=scan_key(); P1=table[key]; } } */ /*void main() { P1=0x00; EA=1; EX0=1; IT0=1; P0=0x0f; while(1){ scan_key(); } } void key_led(void) interrupt 0 { unsigned char key,tmp; delay10ms(); P0=0x0f; tmp=P0; if(tmp!=0x0f) { key=scan_key(); P1=table[key]; } } */ /*#include<AT89X52.H> unsigned char table[]={0x3f,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71}; void delay10ms(void) { unsigned char i,j; for(i=20;i>0;i--) for(j=248;j>0;j--); } void main() { unsigned char tmp,key; P1=0x00; while(1) { while(tmp==0x0f) { P0=0x0f; tmp=P0; } delay10ms(); P0=0x0f; tmp=P0; if(tmp==0x0f) continue; key=scan_key(); P1=table[key]; } } unsigned char scan_key(void) { unsigned char scan,col,rol,tmp; bit flag=0; scan=0xef; for(col=0;col<4;col++) { P0=scan; tmp=P0; switch(tmp&0x0f) { case 0x0e:rol=0;flag=1;break; case 0x0e:rol=1;flag=1;break; case 0x0e:rol=2;flag=1;break; case 0x0e:rol=3;flag=1;break; } if(flag==1)break; scan=(scan<<1)+1; } while(tmp!=0x0f) { P0=0x0f; tmp=P0; } return(rol*4+col); } #include<AT89X52.H> unsigned char table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d, 0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; void delay10ms(void) { unsigned char i,j; for(i=20;i>0;i--) for(j=248;j>0;j--); } unsigned char scan_key(void) { unsigned char scan,col,rol,tmp; bit flag=0; scan=0xef; for(col=0;col<4;col++) { P0=scan; tmp=P0; switch(tmp&0x0f) { case 0x0e: rol=0;flag=1;break; case 0x0d: rol=1;flag=1;break; case 0x0b: rol=2;flag=1;break; case 0x07: rol=3;flag=1;break; } if( flag==1)break; scan=(scan<<1)+1; } while(tmp!=0x0f) { P0=0x0f; tmp=P0; } return(rol*4+col); } void main() { unsigned char tmp,key; P1=0x00; while(1) { while(tmp==0x0f) { P0=0x0f; tmp=P0; } delay10ms(); P0=0x0f; tmp=P0; if(tmp==0x0f)continue; key=scan_key(); P1=table[key]; } } */ #include<AT89X52.H> unsigned char table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d, 0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; void delay10ms(void) { unsigned char i,j; for(i=20;i>0;i--) for(j=248;j>0;j--); } unsigned char scan_key(void) { unsigned char scan,col,rol,tmp; bit flag=0; scan=0xef; for(col=0;col<4;col++) { P0=scan; tmp=P0; switch(tmp&0x0f) { case 0x0e: rol=0;flag=1;break; case 0x0d: rol=1;flag=1;break; case 0x0b: rol=2;flag=1;break; case 0x07: rol=3;flag=1;break; } if( flag==1)break; scan=(scan<<1)+1; } while(tmp!=0x0f) { P0=0x0f; tmp=P0; } return(rol*4+col); } void main() { unsigned char tmp,key; P1=0x00; while(1) { while(tmp==0x0f) { P0=0x0f; tmp=P0; } delay10ms(); P0=0x0f; tmp=P0; if(tmp==0x0f)continue; key=scan_key(); P1=table[key]; } }
6.模数转换
所需元件：
ADC0809,AT89C51,CAP,CAP-ELEC,CRYSTAL,LED-BARGRAPH-RED,LED-BIBY,
POT-HG,RES
例图：
编辑
例图代码：
#include<reg52.h> #include<INTRINS.h> sbit EOC=P2^4; sbit START=P2^5; sbit CLOCK=P2^6; sbit OE=P2^7; unsigned char temp; void main(void) { TMOD=0x02; TH0=206; TL0=206; EA=1; ET0=1; TR0=1; while(1) { START=0; START=1; START=0; while(EOC==0); OE=1; temp=P0; P1=temp; _nop_(); _nop_(); } } void t0(void) interrupt 1 using 0 { CLOCK=~CLOCK; }
