按键加一计数显示程序.c

单片机开发资料光盘-双龙-686M.zip

#include <io8515.h>                   /*头文件*/
#define uchar unsigned char           /*缩写定义*/
#define uint unsigned int
flash uchar DATA_7SEG[ ] ={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
                           0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};/*LED 字形表*/
uchar led[6] ;                       /*显示缓冲*/
uint count;
void delay(uint t)                    /*延时子程序*/
{
 uint i;
 for (i=0;i<t;i++)
    ;
}
void init_disp(void)                  /*初始化B 口,D 口*/
{
 DDRB=0xff;
 DDRD=0x7f;
 PORTD|=0x80;
} 
void disp(void)                       /*数码管显示*/
{
 uchar i;
 for (i=0;i<6;i++)
   {
    PORTD=~(0x01<<i);
    PORTB=DATA_7SEG[led[i]];
    delay(1000);
    }
  PORTB=0x00;
  PORTD=0xff;
}
void be_pc0(void)                    /*发出一声响子程序*/
{
 uint i;
 DDRC|=0x01;
 for (i=0;i<350;i++)
    {
     PORTC^=0x01;
     delay(350);
    }
}
void conv(void)                      /*计数值转换成十进制数*/
{
led[5] =0;
led[4] =count/10000;
led[3] =count/1000%10;
led[2] =count/100%10;
led[1] =count/10%10;
led[0] =count%10;
}
void main(void)                              /*主程序*/
{
 init_disp();                                /*初始化B 口,D 口*/
 count=0;                                    /*开始计数值是零*/
 conv();                                     /*转换*/
 for(;;)
    {
     while((PIND&0x80)==0x80)                /*没有键按下等待*/
         disp();                             /*显示*/
     be_pc0();                               /*发出一声响*/
     count++;                                /*计数器加1*/
     conv();                                 /*转换成十进制数*/
     while((PIND&0x80)==0)                   /*有键按下*/
         disp();                             /*显示*/
     }
}