在51单片机如何实现多任务的程序

SMG_Value[Move_Num] = 9;

else

SMG_Value[Move_Num] -= 1;

}

}

Key3_Flag2 = 0;

}

}

//进入循环显示后清键值单元

void Clear_Key_Data(void)

{

SMG_Value[3] = 0;

SMG_Value[2] = 0;

SMG_Value[1] = 0;

SMG_Value[0] = 0;

}

//数码管显示子程序

void Display_ShuM()

{

unsigned char i;

Qian_bit = 0;

Shu_Ma_Data = Led_Byte[SMG_Value[3]];

if (( Move_Num == 3 ) && ( CDis_Flag ))

XiSu_Dian = 1;

for ( i = 0;i < 20; i++);

Qian_bit = 1;

Bai_bit = 0;

Shu_Ma_Data = Led_Byte[SMG_Value[2]];

if (( Move_Num == 2 ) && ( CDis_Flag ))

XiSu_Dian = 1;

for ( i = 0;i < 20; i++);

Bai_bit = 1;

Shi_bit = 0;

Shu_Ma_Data = Led_Byte[SMG_Value[1]];