急求：用扫描法读出4×4矩阵键盘，在8×8LED点阵屏上点亮对应灯（用单片机89C51） 要仿真图和C程序！

#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit A = P2^5;
sbit B1 = P2^6;
sbit C = P2^7;
uchar code lie[]={1,2,4,8,16,32,64,128};
uchar code DIS1[]=
{
0xff,0xff,0xff,0xf