36、数字（2、4、5）大流动显示
（1）P1口接4*4键盘，P0、P2口（低3位）控制8位数码管的段和位。
（2）按第1行的某个键显示某个数字，按第2行的某个键显示另外1 个数字；
按第3行的某个键加快循环，按第4行的某个键变慢循环。
#include<reg52.h>
#define dula P0
#define wela P2
sbit a = P3^0;
sbit b = P3^1;
sbit c = P3^2;
sbit d = P3^3;
unsigned char disbuff[] = {0,1,10,10,10,10,10,10};
unsigned char disbuff1[] = {10,10,10,10,10,10,3,2};
unsigned char disbuff2[] = {4,5,10,10,10,10,10,10};
unsigned char disbuff3[] = {10,10,10,10,10,10,6,7};
unsigned char dulacode[] = {0x43,0x40,0x40,0x4c,0x23,0x42,0x54,0x0c,0x7f,0x6f,0} ;
unsigned char p = 1;
void delayms(unsigned char x)
{
unsigned char i,j;
for(i=x;i>0;i--)
{
for(j=123;j>0;j--);
}
}
void init()
{
unsigned char i,j;
disbuff[0] = 0;
disbuff[1] = 1;
for(i=2;i<8;i++)
disbuff[i] = 10;
disbuff1[6] = 3;
disbuff1[7] = 2;
for(j=0;j<6;j++)
disbuff1[j] = 10;
p=1;
}
void init1()
{
unsigned char i,j;
disbuff2[0] = 6;
disbuff2[1] = 7;
for(i=2;i<8;i++)
disbuff2[i] = 10;
disbuff3[6] = 4;
disbuff3[7] = 5;
for(j=0;j<6;j++)
disbuff3[j] = 10;
p=1;
}
void display()
{
unsigned char i;
for(i=0;i<8;i++)
{
dula=0x00;
dula = dulacode[disbuff[i]];
wela = i;
delayms(3);
}
}
void display1()
{
unsigned char i;
for(i=0;i<8;i++)
{
dula=0x00;
dula = dulacode[disbuff1[i]];
wela = i;
delayms(3);
}
}
void display2()
{
unsigned char i;
for(i=0;i<8;i++)
{
dula=0x00;
dula = dulacode[disbuff2[i]];
wela = i;
delayms(3);
}
}
void display3()
{
unsigned char i;
for(i=0;i<8;i++)
{
dula=0x00;
dula = dulacode[disbuff3[i]];
wela = i;
delayms(3);
}
}
void remove1()
{
unsigned char a,j;
a = disbuff1[0];
for(j=0;j<7;j++)
{
disbuff1[j] = disbuff1[j+1];
}
disbuff1[7] = a;
p++;
}
void remove()
{
unsigned char a,j;
a = disbuff[7];
for(j=7;j>0;j--)
{
disbuff[j] = disbuff[j-1];
}
disbuff[0] = a;
p++;
}
void remove2()
{
unsigned char a,j;
a = disbuff2[7];
for(j=7;j>0;j--)
{
disbuff2[j] = disbuff2[j-1];
}
disbuff2[0] = a;
p++;
}
void remove3()
{
unsigned char a,j;
a = disbuff3[0];
for(j=0;j<7;j++)
{
disbuff3[j] = disbuff3[j+1];
}
disbuff3[7] = a;
p++;
}
void main()
{
unsigned char i,j;
unsigned int k;
P3 = 0x0f;
a = 1;
while(1)
{
if(a == 0)
{
a =0;
if(p<7)
{
i = 50;
while(i--)
display2();
remove2();
k = 50;
if(b == 0)
{
b=0;
while(k--)
display2();
// remove2();
if(c == 0)
k = 1;
}
if( d == 0)
{
break;
}
}
else if (p==7)
{
k=50000;
wela = 7;
while(k--)
dula = 0x5b;
delayms(224);
p++;
}
else if (p>7&&p<14)
{
j = 50;
while(j--)
display3();
remove3();
k=50;
if(b == 0)
{
b=0;
while(k--)
display3();
//remove3();
if(c == 0)
k= 1;
}
if( d == 0)
{
break;
}
}
else if(p==14)
{
k=50000;
wela = 0;
while(k--)
dula = 0x5b;
init1();
delayms(224);
}
}
else{
if(p<7)
{
i = 50;
while(i--)
display();
remove();
}
else if (p==7)
{
k=50000;
wela = 7;
while(k--){
dula = 0x66;}
delayms(224);
p++;
}
else if (p>7&&p<14)
{
j = 50;
while(j--)
display1();
remove1();
}
else if(p==14)
{
k=50000;
wela = 0;
while(k--){
dula = 0x56;}
init();
delayms(224);
}
}
}
}
19、计价器——数码管显示
使用2个定时器，1个计数、1个定时；计数器记录车辆行驶车轮转的圈数，从而计算出行驶的里程和钱数；定时器记录行驶的时间。
（1）用2个8位数码管显示行驶时间和里程、钱数，用P0口、P2口控制1个数码管，用P3、P2口控制另外1个数码管。
（2）显示时间的时、分、秒为“**﹣**﹣**”；里程显示为“***.*”（公里），钱数显示为“***.*”（元）。
（3）用P1口设计1个按钮，启动（同时清0）/停止。
#include<reg52.h>
#define dula P0
#define wela P2
#define dula1 P1
sbit key1=P3^1;
unsigned char disbuff[] = {0,0,10,0,0,10,0,0};
unsigned char disbuff1[] = {0,0,0,0,0,0,0,0};
unsigned char hour,min,sec,num,dulacode[] = {0x3f,6,0x5b,0x4f,0x66,0x6d,0x7d,7,0x7f,0x6f,0x40};
unsigned char welacode[] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char welacode1[] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
dulacode1[] = {0x3f,6,0x5b,0x4f,0x66,0x6d,0x7d,7,0x7f,0x6f,0x40};
unsigned char num1,num2;
unsigned int p;
unsigned long int s;
void delayms(int x)
{
int i,j;
for(i=x;i>0;i--)
for(j=110;j>0;j--);
}
void display()
{
unsigned int j;
unsigned char i;
for(i=0;i<8;i++)
{
wela = 0xff;
dula = dulacode[disbuff[i]];
dula1 = dulacode[disbuff1[i]];
if(i==6||i==2)
dula1=dula1+0x80;
wela = welacode[i] ;
for(j=0;j<400;j++);
}
}
void time0() interrupt 1
{
TL0 = 55536%256;
TH0 = 55536/256;
num++;
if(num > 99)
{
num = 0;
sec++;
if(sec>59)
{
sec=0;
min++;
if(min>59)
{
min=0;
hour++;
if(hour>23)
{
hour=0;
}
}
}
}
disbuff[0]=hour/10;
disbuff[1]=hour%10;
disbuff[3]=min/10;
disbuff[4]=min%10;
disbuff[6]=sec/10;
disbuff[7]=sec%10;
}
void ssp()
{
unsigned char i;
s=(TL1+TH1*256)/100;
if(s<20)
{
p=50;
}
else
{
p= 50 + (s-20)*2;
}
disbuff1[0]=p%10000/1000;
disbuff1[1]=p%1000/100;
disbuff1[2]=p%100/10;
disbuff1[3]=p%10;
i =7;
while(s)
{
disbuff1[i--]=s%10;
s=s/10;
}
}
void KeyScan()
{
if(key1==0)
{
delayms(10);
if(key1==0)
{
TH1=0;
TL1=0;
TR1=!TR1;
num=0;
num1=1;
num2=1;
sec=0;
}
while(!key1);
}
}
void main()
{
TMOD=0x51;
TH0=55536/256;
TL0=55536%256;
TH1=0;
TL1=0;
EA=1;
ET0=1;
// ET1=1;
TR0=1;
TR1=1;
while(1)
{
KeyScan();
display();
ssp();
}
}
仿真图如下：
注意这个信号源的电压一定要设置到5V以上；
定时器T1要设置成计数原理，他对应TMOD的高四位，其中把第二位设置成1为计数器，所以他的高四位是5；
15、交通灯——数码管显示
使用定时器产生秒，双方向倒计时，分别显示各自时间（时间不同）；红灯亮33秒，绿灯亮24秒，黄灯闪3秒，双向红灯重叠亮3秒。用6位数码管显示双向时间（中间2位不用）。
#include<reg52.h>
#define dula P0
#define wela P2
sbit a; = P1^0
sbit a1 = P1^1;
sbit a2 = P1^2;
sbit b = P1^5;
sbit b1 = P1^6;
sbit b2 = P1^7;
unsigned char disbuff[] = {0,0,10,10,0,0};
unsigned char num,dulacode[] = {0x3f,6,0x5b,0x4f,0x66,0x6d,0x7d,7,0x7f,0x6f,0x00};
unsigned char welacode[] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf};
unsigned char temp1=0,temp=0;
unsigned char flag1,flag;
unsigned char k=1,k1=1;
void display()
{
unsigned int j;
unsigned char i;
for(i=0;i<6;i++)
{
wela = 0xff;
dula = dulacode[disbuff[i]];
wela = welacode[i];
for(j=0;j<500;j++);
}
}
void time0() interrupt 1
{
TL0 = 55536%256;
TH0 = 55536/256;
num++;
if(num > 99)
{
num = 0;
if(temp==0&&flag==0)
{
temp = 24;
flag++;
k++;
a=0;a1=0;a2=1;
}
if(flag==2&&k==2)
{
a1 = ~a1;
}
else if(temp==0&&flag==1)
{
temp = 3;
flag++;
a=0;a1=1;a2=0;
}
if(temp==0&&flag==2)
{
k=1;
temp = 30;
flag=0;
a=1;a1=0;a2=0;
}
if(temp1==0&&flag1==0)
{
temp1 = 30;
flag1++;
k1=1;
b=1;b1=0;b2=0;
}
else if(temp1==0&&flag1==1)
{
temp1 = 24;
flag1++;
k1++;
b=0;b1=0;b2=1;
}
if(flag1==0&&k1==2)
{
b1=~b1;
}
if(temp1==0&&flag1==2)
{
temp1 = 3;
flag1=0;
b=0;b1=1;b2=0;
}
temp--;
temp1--;
}
disbuff[0]=temp/10;
disbuff[1]=temp%10;
disbuff[4]=temp1/10;
disbuff[5]=temp1%10;
}
void main()
{
TMOD = 0x01;
TH0=65536/256;
TL0=65536%256;
ET0 = 1;
EA =1;
TR0=1;
while(1)
display();
}
