本程序利用4*4矩阵键盘实现数码管显示0~F，键盘扫描利用的是反转法，程序里有仿真电路和程序，还有详细的注释。-This program uses the 4* 4 matrix keyboard to achieve digital display 0 ~ F, keyboard scan inversion method is utilized, with circuit simulation program and procedures, as well as detailed notes