说明：  此程序为一排队机呼叫器,主要功能是：用键盘控制液晶显示实现485通讯,具体协议可参考《排队机通讯协议050609.doc》.编译环境为ICC-AVR6.3,采用了ATmega8芯片,晶振速率为6.0000Mhz
(Queue for a beeper, the main function is : keyboard control LCD achieve 485 newsletters, reference specific agreement "Queue 050609.doc communication protocol." Build environment for the ICC-AVR6.3 using the ATmega8 chips, crystal rate of 6. 0000Mhz)