基于C51的最小单片机系统报告

基于C51的单片机最小系统,开始时,发光二极管以一秒间隔闪烁,同时数码管显示1.00,按下按键后,发光二极管以0.25秒间隔闪烁,同时数码管显示0.25,以次规律交替

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基于C51的单片机最小系统,开始时,发光二极管以一秒间隔闪烁,同时数码管显示1.00,按下按键后,发光二极管以0.25秒间隔闪烁,同时数码管显示0.25,以次规律交替

1. DESIGN GOALS

Function : digitron displays 0.25 at first.When the button is pressed,digitron change to display 1.00. The light-emitting diode flash 1 second at the same time. When the button is pressed again,the digitron displays 0.25.And the led flash 0.25 second.Then do as the circle.

2. THE REQUIRED COMPONENT component(number)

Light-emitting diode(1). Resistance:1k(1),10k(2) button(2) capacitor:30pF(2),10uF(1) crystal 12MHZ(1) exclution(1) 80C51(1) digitron(1) battery box(1)

3.

CIRCUIT SCHEMATICS

基于C51的单片机最小系统,开始时,发光二极管以一秒间隔闪烁,同时数码管显示1.00,按下按键后,发光二极管以0.25秒间隔闪烁,同时数码管显示0.25,以次规律交替

4.CODES

#include<reg52.h>

#define uchar unsigned char

#define uint unsigned int

sbit key=P1^0;

sbit led=P1^4;

uchar numt=0,n,logo;

void delayms(uint);

void display1();

void display2();

void keyscan();

void init();

void main()

{

init();

TR0=1;

led=0;

while(1)

{

keyscan();

if(!logo) display1();

if(logo) display2(); }

}

void init()

{

logo=0;

n=5;

TMOD=0x01;

TH0=(65536-45872)/256; TL0=(65536-45872)%256; EA=1;

ET0=1;

基于C51的单片机最小系统,开始时,发光二极管以一秒间隔闪烁,同时数码管显示1.00,按下按键后,发光二极管以0.25秒间隔闪烁,同时数码管显示0.25,以次规律交替

}

void keyscan()

{

if(key==0)

{

delayms(5); if(key==0)

{

TR0=0; logo=~logo; if(!logo) n=5; if(logo) numt=0; while(!key); TR0=1; }

}

}

void delayms(uint xms)

{

uint i,j;

for(i=xms;i>0;i--)

for(j=110;j>0;j--);

}

void display1()

{

P2=0x0e;

P0=0xef;

delayms(5);//显示0. P0=0x00;

P2=0x0d;

P0=0xb3;

delayms(5);//显示2 P0=0x00; n=20;

基于C51的单片机最小系统,开始时,发光二极管以一秒间隔闪烁,同时数码管显示1.00,按下按键后,发光二极管以0.25秒间隔闪烁,同时数码管显示0.25,以次规律交替

P2=0x0b;

P0=0x7a;

delayms(5);//显示5 P0=0x00;

}

void display2()

{

P2=0x0e;

P0=0x8c;

delayms(5);//显示1. P0=0x00;

P2=0x0d;

P0=0xeb;

delayms(5);//显示0 P0=0x00;

P2=0x0b;

P0=0xeb;

delayms(5);//显示0 P0=0x00;

}

void T0_time()interrupt 1

{

TH0=(65536-45872)/256; TL0=(65536-45872)%256; numt++;

if(numt==n)

{

led=~led;

numt=0;

基于C51的单片机最小系统,开始时,发光二极管以一秒间隔闪烁,同时数码管显示1.00,按下按键后,发光二极管以0.25秒间隔闪烁,同时数码管显示0.25,以次规律交替

}

} //codes ending

5. RENDERINGS