zlg7289芯片控制程序，ZLG7289芯片应用于键盘接口，自动按键扫描，LED输出等功能，包含源程序和头文件-zlg7289 chip control procedures, ZLG7289 chips used in the keyboard interface, automatic Scan button, LED output functions, including source and header files

RS485数据控制程序，用于安防OSD键盘控制。-RS485 data control procedures for the security OSD keyboard control.