www.pudn.com > time.rar > main.c

#define MAIN_C 
#include "includes.h" 
/*************************************************************/ 
/*T0工作在定时方式*/  
/*定时器采用8MHz系统时钟的256分频作为定时时钟*/ 
/*即每32 us计一个数，每计250个数（8ms)溢出一次*/ 
/*中断复位程序统计计数次数，计数125次时，秒钟加1*/ 
/*************************************************************/ 
//数码管字形表 
//数码管为公阴极 
unsigned char table[10] =  
{ 
  0x3f,   //0 
  0x06,   //1 
  0x5b,   //2 
  0x4f,   //3 
  0x66,   //4 
  0x6d,   //5  
  0x7d,   //6  
  0x07,   //7  
  0x7f,   //8 
  0x6f    //9 
}; 
 
void display(unsigned char *p) 
{ 
    unsigned char i; 
    unsigned sel = 0x08; 
    for(i=0;i<4;i++) 
    { 
        ConPort = ~sel; 
        OutPort = table[p[i]]; 
        delay_nms(1); 
        sel = sel>>1; 
    } 
} 
 
 
 
 
void main(void) 
{ 
   // unsigned char load; 
    InitIo(); 
    PORTA = 0xff;  //点亮测试所有数码管 
    PORTC = 0x00;    
    delay_nms(20); 
    PORTC = 0xff;   //熄灭所有数码管 
    TCCR0 |= (1<