说明：  单片机控制的CH452显示程序，单片机为Sm89c52，其中包括Ch452的初始化子程序，发送命令子程序，显示一个uchar字符的子程序，显示一个uint字符的子程序以及某指定的数码管不显示的子程序……
(Controlled by CH452 display program, MCU Sm89c52, including Ch452 initialization subroutine, send the command subroutine, the subroutine displays a uchar character, the subroutine displays a uint character and a specified digital controls are not displayed subroutine ... ...)