#include
#define KEYPORT P1
#include "./delay/delay.h"
sbit seg_select = P2^0; //段选
sbit bit_select = P2^1; //位选
#define SEGPORT P0
unsigned char segdata[10] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
unsigned char bitdata[8] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char TempData[2];
void display(void)
{
static unsigned char i = 0;
SEGPORT = 0x0; //消除重影
seg_select = 1;
seg_select = 0;
SEGPORT = 0xff;
bit_select = 1;
bit_select = 0;
SEGPORT = TempData[i];
seg_select = 1;
seg_select = 0;
SEGPORT = bitdata[i];
bit_select = 1;
bit_select = 0;
i++;
if(2 == i)
{
i = 0;
}
}
void timer0_init(void) //中断函数
{
EA = 1; //打开总中断
TMOD |= 0x01; //设置定时器工作方式
TH0 = (65536 - 2000) / 256;
TL0 = (65536 - 2000) % 256;
ET0 = 1; //打开定时器中断允许
TR0 = 1;
}
void timer0_isr(void) interrupt 1 //中断服务程序
{
TH0 = (65536 - 2000) / 256;
TL0 = (65536 - 2000) % 256;
display();
}
unsigned char key_scan(void)
{
unsigned char keyvalue;
KEYPORT = 0xf0;
if(0xf0 != KEYPORT) // 有按键按下
{
delay_ms(10);
if(0xf0 != KEYPORT) //确实有按键按下
{
//KEYPORT &= 0xfo;
KEYPORT = 0xfe;
if(0xfe != KEYPORT)
{
keyvalue = KEYPORT;
while(0xfe != KEYPORT); //有按键抬起
delay_ms(10);
while(0xfe != KEYPORT); //确实有按键抬起
return keyvalue;
}
KEYPORT = 0xfd;
if(0xfd != KEYPORT)
{
}
KEYPORT = 0xfb;
if(0xfb != KEYPORT)
{
}
KEYPORT = 0xf7;
if(0xf7 != KEYPORT)
{
}
}
}
return 0xff;
}
unsigned key_prc()
{
unsigned char keynum;
keynum = key_scan();
switch(keynum)
{
case 0x7e: return 0; break;
case 0xbe: return 1; break;
case 0xde: return 2; break;
case 0xee: return 3; break;
default: return 0xff; break;
}
}
void main()
{
unsigned char key;
timer0_init();
while(1)
{
key = key_prc();
if(0xff != key)
{
TempData[0] = segdata[key / 16];
TempData[1] = segdata[key % 16];
}
}
}
/*********delay.c*******/
void delay_us(unsigned char t)
{
while(--t);
}
void delay_ms(unsigned char t)
{
while(t--)
{
delay_us(245);
delay_us(245);
}
}
void delay_s(unsigned char t)
{
while(t--)
{
delay_ms(200);
delay_ms(200);
delay_ms(200);
delay_ms(200);
delay_ms(200);
}
}
/*******delay.h******/
#ifndef _DELAY_H_
#define _DELAY_H_
extern void delay_us(unsigned char t);
extern void delay_ms(unsigned char t);
extern void delay_s(unsigned char t);
#endif
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