init.c

void System_Init()
{
	P0 = 0x00;   //关闭蜂鸣器和继电器
	P2 = P2 & 0x1f | 0xa0;
	P2 &= 0x1f;
	
	P0 = 0x00;   //关闭LED
	P2 = P2 & 0x1f | 0x80;
	P2 &= 0x1f;
}

led.c

#include <LED.H>

idata  unsigned char temp_1 = 0x00;
idata  unsigned char temp_old_1 = 0xff;
 
void Led_Disp(unsigned char *ucLed)
{
   temp_1=0x00;
   temp_1 = (ucLed[0] << 0) | (ucLed[1] << 1) | (ucLed[2] << 2) | (ucLed[3] << 3) |
         (ucLed[4] << 4) | (ucLed[5] << 5) | (ucLed[6] << 6) | (ucLed[7] << 7);
  if (temp_1 != temp_old_1)
  {
    P0 = ~temp_1;
		
		
		P2 = P2 & 0x1f | 0x80;
		P2 &= 0x1f;
		
    temp_old_1 = temp_1;
  }
}

seg.c

#include <Seg.H>

unsigned char Seg_dula[] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff};
unsigned char Seg_wela[] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80};

void Seg_Dis(unsigned char wela, unsigned char dula,unsigned char piont)
{
	P0 = 0xff;
	P2 = P2 & 0x1f | 0xe0;
	P2 &= 0x1f;
	
	P0 = Seg_wela[wela];
	P2 = P2 & 0x1f | 0xc0;
	P2 &= 0x1f;
	
	P0 = Seg_dula[dula];
	if(piont) P0 &= 0x7f;
		
	P2 = P2 & 0x1f | 0xe0;
	P2 &= 0x1f;
	
}

key.c

#include <Key.H>

unsigned char Key_Read()
{
	unsigned char temp = 0;
	P44 = 0;P42 = 1;P35 = 1;P34 = 1;
	if(P33 == 0) temp = 4;
	if(P32 == 0) temp = 5;
	if(P31 == 0) temp = 6;
	if(P30 == 0) temp = 7;
	P44 = 1;P42 = 0;P35 = 1;P34 = 1;
	if(P33 == 0) temp = 8;
	if(P32 == 0) temp = 9;
	if(P31 == 0) temp = 10;
	if(P30 == 0) temp = 11;
	P44 = 1;P42 = 1;P35 = 0;P34 = 1;
	if(P33 == 0) temp = 12;
	if(P32 == 0) temp = 13;
	if(P31 == 0) temp = 14;
	if(P30 == 0) temp = 15;
	P44 = 1;P42 = 1;P35 = 1;P34 = 0;
	if(P33 == 0) temp = 16;
	if(P32 == 0) temp = 17;
	if(P31 == 0) temp = 18;
	if(P30 == 0) temp = 19;
	return temp;
}

main

unsigned char Key_Slow_down;
unsigned char Seg_Slow_down;
unsigned char Key_Val, Key_Old, Key_Down, Key_Up;
unsigned char Seg_Pos;
unsigned char Seg_Buf[] = {10,10,10,10,10,10,10,10};
unsigned char Seg_Point[] = {0,0,0,0,0,0,0,0};
unsigned char ucLED[8] = {0,0,0,0,0,0,0,0};

void Key_Proc()
{
	if(Key_Slow_down) return;
	
	Key_Slow_down = 1;
	Key_Val = Key_Read();
	Key_Down = Key_Val & (Key_Val ^ Key_Old);
	Key_Up = ~Key_Val & (Key_Val ^ Key_Old);
	Key_Old = Key_Val;
	
}

void Seg_Proc()
{
	if(Seg_Slow_down) return;
	Seg_Slow_down = 1;
}

void LED_Proc()
{

}

void Timer0Init(void)		//0毫秒@12.000MHz
{
	AUXR &= 0x7F;		//定时器时钟12T模式
	TMOD &= 0xF0;		//设置定时器模式
	TMOD |= 0x05;	
	TL0 = 0x00;		//设置定时初值
	TH0 = 0x00;		//设置定时初值
	TF0 = 0;		//清除TF0标志
	TR0 = 1;		//定时器0开始计时
}


void Timer1Init(void)		//1毫秒@12.000MHz
{
	AUXR &= 0xBF;		//定时器时钟12T模式
	TMOD &= 0x0F;		//设置定时器模式
	TL1 = 0x18;		//设置定时初值
	TH1 = 0xFC;		//设置定时初值
	TF1 = 0;		//清除TF1标志
	TR1 = 1;		//定时器1开始计时
	ET1 = 1;
	EA = 1;
}


void Timer1Sever()  interrupt 3
{
	if(++Key_Slow_down == 10) Key_Slow_down = 0;
	if(++Seg_Slow_down == 100) Seg_Slow_down = 0;
	if(++Seg_Pos == 8) Seg_Pos = 0;
	Seg_Dis(Seg_Pos, Seg_Buf[Seg_Pos], Seg_Point[Seg_Pos]);
	Led_Disp(ucLED);
	
}

void main()
{
	System_Init();
	Timer0Init();
	Timer1Init();
	while(1)
	{
		Key_Proc();
		Seg_Proc();
		LED_Proc();
	}
}