单片机仿真！

朱威斯

谁能帮我看一下为啥这个数码管显示不出来呀(按键控制数码管移动)
代码啥的好像没太大错误
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
uchar code DSY_CODE[]={
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff
};
uchar code DSY_Index[]={
0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01
};
uchar Display_Buffer[]={
10,10,10,10,10,10,10,10
};
void DelayMs(uint x)
{
uchar i;
while(x--)
for(i=0;i<120;i++);
}
void Show_Count_ON_DSY()
{
uchar i;
for(i=0;i<8;i++);
{
P0=0xff;
P0=DSY_CODE[Display_Buffer];
P2=DSY_Index;
DelayMs(2);
}
}
void main()
{
uchar i,Key_NO,Key_Counts=0;
P1=0xff;
while(1)
{
Show_Count_ON_DSY();
Key_NO=P1;
switch(Key_NO)
{
case 0xfe: Key_Counts++; if(Key_Counts>8) Key_Counts=8; Display_Buffer[Key_Counts-1]=Key_Counts; break;
case 0xfd: if(Key_Counts>0)  Display_Buffer[--Key_Counts]=10;  break;
case 0xfb: for(i=0;i<8;i++) Display_Buffer=10;  Key_Counts=0;
}
while(P1!=0xff) Show_Count_ON_DSY();
}}