51单片机模拟秒表（软件延时）

代码：

#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 9unsigned int counter = 0;
void mDelay(uint16 mtime)
{for(; mtime > 0; mtime--){uint8 j = 244;while(--j);}
}
void LED_Disp_Seg7()
{int a[4];int j, k;j = counter%60;k = counter/60;a[3] = j%10;a[2] = j/10;a[1] = k%10;a[0] = k/10;P2 = 0xef;P0 = LED_Disp[a[0]];mDelay(5);P2 = 0xdf;P0 = LED_Disp1[a[1]];mDelay(5);P2 = 0xbf;P0 = LED_Disp[a[2]];mDelay(5);P2 = 0x7f;P0 = LED_Disp[a[3]];mDelay(5);}
void timeDelay(unsigned int  time)
{while(time--){LED_Disp_Seg7();}
}void main()
{while(1){timeDelay(100);counter++;}
}

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