51单片机矩阵扫描键盘程序实例2页.doc

51单片机矩阵扫描键盘程序#include #include#define uchar unsigned char#define uint unsigned intuchar idata x,y;uchar code disp_code = 0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8, 0x80, 0x90, / 0-9 0 1 2 3 4 5 6 7 8 9 0x88, 0x83, 0xc6, 0xa1, 0x86, 0x8e, / 10-15 a b c d e f 0x7F, 0xBF, 0x9C, 0xFF / 16-19 . - 。null; /数码管显示值列表void delay(uchar c) /延时函数 char a,b; for(a=c;a0;a-) for(b=110;b0