了解中断器的使用与定时器的使用
学会if,switch语句
学会查找数据手册
自己改了一个不知道对不对
在秒表计数时前面不显示零
#include<reg52.h>
sbit ADDR0=P1^0;
sbit ADDR1=P1^1;
sbit ADDR2=P1^2;
sbit ADDR3=P1^3;
sbit ENLED=P1^4;
unsigned char code Ledchar[]=
{
0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8,
0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E
};
unsigned char Ledbuff[6]=
{
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
};
unsigned char flag=1;
unsigned long cnt=0;
unsigned char i=0;
void main()
{
unsigned long sec=0;
ENLED=0;
ADDR3=1;
TMOD=0x01;
TH0=0XFC;
TL0=0x67;
TR0=1;
EA=1;
ET0=1;
while(1)
{
if(flag==1)
{
flag=0;
sec++;
if(sec<10){Ledbuff[0]=Ledchar[sec%10];Ledbuff[1]=Ledchar[17];Ledbuff[2]=Ledchar[17];Ledbuff[3]=Ledchar[17];Ledbuff[4]=Ledchar[17];Ledbuff[5]=Ledchar[17]; }
else if(10<=sec<100){Ledbuff[0]=Ledchar[sec%10];Ledbuff[1]=Ledchar[sec/10%10];Ledbuff[2]=Ledchar[17];Ledbuff[3]=Ledchar[17];Ledbuff[4]=Ledchar[17];Ledbuff[5]=Ledchar[17]; }
else if(100<=sec<1000){Ledbuff[0]=Ledchar[sec%10];Ledbuff[1]=Ledchar[sec/10%10];Ledbuff[2]=Ledchar[sec/100%10];Ledbuff[3]=Ledchar[17];Ledbuff[4]=Ledchar[17];Ledbuff[5]=Ledchar[17]; }
else if(1000<=sec<10000){Ledbuff[0]=Ledchar[sec%10];Ledbuff[1]=Ledchar[sec/10%10];Ledbuff[2]=Ledchar[sec/100%10];Ledbuff[3]=Ledchar[sec/1000%10];Ledbuff[4]=Ledchar[17];Ledbuff[5]=Ledchar[17]; }
else if(10000<=sec<100000){Ledbuff[0]=Ledchar[sec%10];Ledbuff[1]=Ledchar[sec/10%10];Ledbuff[2]=Ledchar[sec/100%10];Ledbuff[3]=Ledchar[sec/1000%10];Ledbuff[4]=Ledchar[sec/10000%10];Ledbuff[5]=Ledchar[17]; }
else if(100000<=sec<1000000){Ledbuff[0]=Ledchar[sec%10];Ledbuff[1]=Ledchar[sec/10%10];Ledbuff[2]=Ledchar[sec/100%10];Ledbuff[3]=Ledchar[sec/1000%10];Ledbuff[4]=Ledchar[sec/10000%10];Ledbuff[5]=Ledchar[sec/100000%10];}
}
}
}
void InterruptTimer0() interrupt 1
{
TH0=0xFC;
TL0=0x67;
cnt++;
if(cnt>=1000)
{
cnt=0;
flag=1;
}
P0=0xFF;
switch(i)
{
case 0: ADDR0=0;ADDR1=0;ADDR2=0;i++0=Ledbuff[0];break;
case 1: ADDR0=0;ADDR1=0;ADDR2=1;i++0=Ledbuff[1];break;
case 2: ADDR0=0;ADDR1=1;ADDR2=0;i++0=Ledbuff[2];break;
case 3: ADDR0=0;ADDR1=1;ADDR2=1;i++0=Ledbuff[3];break;
case 4: ADDR0=1;ADDR1=0;ADDR2=0;i++0=Ledbuff[4];break;
case 5: ADDR0=1;ADDR1=0;ADDR2=1;i++0=Ledbuff[5];break;
default:break;
}
}
|