51单片机的IO口设置及输入输出设置，有用-IO port settings

IO口控制程序初步,51单片机内部资源的使用以及外括样例-IO port control procedures initial 51 microcontroller use of internal resources and outside, including sample

利用stc89c52单片机实现对lcd12864的显示，采用串行数据输入减少对io口资源的使用，提高单片机的效率-Using STC89C52 microcontroller to achieve the LCD12864 display, the use of serial data input to reduce the use of IO port resources, improve the efficiency of SCM