#include <reg51.h>
#define GPIO_PLACE P1 //段选
#define DataPort P0 //位选
sbit KEY_UP=P2^7; //加
sbit KEY_DOWN=P2^6; //减
unsigned char code Bit[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char code Seg[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
unsigned char TempData[2];
void DelayUs2x(unsigned char t)
{
while(--t);
}
void DelayMs(unsigned char t)
{
while(t--)
{
DelayUs2x(245);
DelayUs2x(245);
}
}
void display(unsigned char FirstBit, unsigned char Num)
{
unsigned char i,j;
for(i=0;i<Num;i++)
{
DataPort = 0x00;
GPIO_PLACE = Bit[i+FirstBit];
j=TempData[i];
DataPort = Seg[j];
DelayMs(10); } }
void Time0_init()
{
TMOD |= 0x01;
EA = 1;
ET0 = 1;
TR0 = 1;
}
void Time0_isr() interrupt 1
{
TH0 = (65536 - 2000) / 256;
TL0 = (65536 - 2000) % 256;
display(0,2);
}
void main()
{
unsigned char key_press_num=0,num=0;
KEY_UP=1;
KEY_DOWN=1;
while(1)
{
if(!KEY_UP)
{
DelayMs(10);
display(0,2);
if(!KEY_UP)
{
while(!KEY_UP)
{
key_press_num++;
DelayMs(10);
display(0,2);
if(key_press_num==100)
{
key_press_num=0;
while(!KEY_UP)
{
num++;
if(num==100)
{
num=0;
}
TempData[1]=num;
TempData[0]=num/10;
DelayMs(100); display(0,2);
}
}
}
key_press_num=0;
num++;
if(num==100)
{
num=0;
}
}
}
if(!KEY_DOWN)
{
DelayMs(10);
display(0,2);
if(!KEY_DOWN)
{
while(!KEY_DOWN)
{
key_press_num++;
DelayMs(10);
display(0,2);
if(key_press_num==100)
{
key_press_num=0;
while(!KEY_UP)
{
num--;
if(num==0xff)
{
num=99;
}
TempData[1]=num;
TempData[0]=num/10;
DelayMs(100);
display(0,2);
}
}
}
key_press_num=0; num--;
if(num==0xff)
{
num=99;
}
}
}
TempData[1]=num;
TempData[0]=num/10;
display(0,2);
}
}
