这是个花样流水灯的程序,请问P2是怎么执行的?谢谢!
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
uchar code Pattern_P0[]=
{
0xfc,0xf9,0xf3,0xe7,0xcf,0x9f
};
uchar code Pattern_P2[]=
{
0xf5,0xf6,0xfe,0x54,0x56,0x76,0xd7,0x49,0xa9,0xe4,0xc6
};
void DelayMS(uint x)
{
uchar t;
while(x--)
{
for(t=120;t>0;t--);
}
}
void main()
{
uchar i;
while(1)
{
for(i=136;i>0;i--)
{
P0=Pattern_P0[i];
P2=Pattern_P2[i];
DelayMS(150);
}
}
} |