电路设计

51单片机简单计时器

2020-12-10 10:04发布

站内文章 / 51单片机
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#include
#define uint8 unsigned char
#define uint16 unsigned short int


//数码管段码显示：0~f,不亮
uint8 code LED_Disp[] = {0xC0,0xF9,0xA4,0xB0,    //这一组编码当中不包含小数点
                        0x99,0x92,0x82,0xF8,
0x80,0x90}; //十个分别显示 0 1 2 3 4 5 6 7 8 9 
uint8 code LED_Disp1[] = {0x40,0x79,0x24,0x30,    //这一个数组的编码中包含小数点
                        0x19,0x12,0x02,0x78,
0x00,0x10}; //十个分别显示 0 1 2 3 4 5 6 7 8 9 


int minute  = 0;
int second = 0;
void mDelay(uint16 mtime)
{
for(; mtime > 0; mtime--)
{
uint8 j = 244;
while(--j);

}
} 
void LED_Disp_Seg7()
{
  

int minute_1;
int minute_2;
int second_1;
int second_2 ;
 
  


if(second == 60)
{
minute++;
second = 0;


} 
if(minute == 60)
{
minute = 0;
}
minute_1 = minute/10;
minute_2 = minute%10;
  second_1 = second/10;
second_2 = second%10;
P2 = 0x7f;
     P0 = LED_Disp[second_2];
     mDelay(5);
 




     P2 = 0xbf;
     P0 = LED_Disp[second_1];
     mDelay(5);
   




     P2 = 0xdf;
     P0 = LED_Disp1[minute_2];
     mDelay(5);
 




     P2 = 0xef;
     P0 = LED_Disp[minute_1];     
     mDelay(5);




  
}
void timeDelay(unsigned int  time)
{
while(time--)
{
LED_Disp_Seg7();
}
}




 
void main()
{
while(1)
{  
timeDelay(80);
  second++;
}  
}