一种具有亮度调节功能的双键盘采集模块设计

Design of Double Keyboard Acquisition Module with Brightness Adjustment Function

针对某型显控终端设计一种具有亮度调节和记忆功能的双键盘采集模块,该模块综合PWM输出和EEPROM记忆功能,将双键盘采集和显示屏亮度控制集成到一个模块中;通过虚拟PS/2键盘和CPU键盘控制器,实现用一个PS/2键盘接口同时响应两种类型键盘的按键输入,WINDOWS系统下PS/2键盘的即插即用,独立的显示屏亮度控制和亮度记忆功能。

We designed a double keyboard acquisition module with brightness adjustment and brightness memory functions for a certain type of display and control terminal.The module synthesized PWM output and EEPROM memory function to integrate double keyboard acquisition and display brightness control into one module.Through the virtual PS/2 keyboard and CPU keyboard controller,we could achieve three goals：first,to respond two types of input keyboard through one PS/2 keyboard interface at the same time;second,to allow for plug and play of the PS/2 keyboard under the WINDOWS system;third,independent screen brightness control and brightness memory function.