[嵌入式]单片机数码管0到19.9

#include <STC15.H>
sbit STCP=P1^0;
sbit SHCP=P1^1;
sbit DS=P1^2;
unsigned char code DisplayHex[]={0xC0,0xf9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x7f};
unsigned char disp[11]={0,1,2,3,4,5,6,7,8,9,10};
void Delay(unsigned int i)
{
	unsigned char j;
	while(i)
	{
		i--;
		for (j=255;j>0;j--)
		{
		}
	}
}
void Send595(unsigned char a)
{
	unsigned char i,j;
	j=0x80;
	for (i=0;i<8;i++)
	{
		if (a&j) DS = 1;
		else           DS = 0;
		SHCP = 0;
		SHCP = 1;
		j>>=1;
	}
}
void DisplayBy595()
{
	unsigned char r,t,y;
	for (y=0;y<2;y++)
	{
	for (t=0;t<10;t++)
	{
	for (r=0;r<10;r++)
	{
		Send595(DisplayHex[disp[r]]);
		Send595(DisplayHex[disp[10]]);
		Send595(DisplayHex[disp[t]]);
		Send595(DisplayHex[disp[y]]);
	STCP=0;
	STCP=1;
	Delay(300);
	}
}
}
}
void main()
{
	P0M0 = 0XFF;P0M1 = 0;
	P1M0 = 0XFF;P1M1 = 0;
		DisplayBy595();
	while(1)
	{
		while(1)
	{
		while(1)
	{
		
	Delay(1000000000000000000000000000000000);
	}
	}
	}
}