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;    當(dāng)口線(xiàn)設(shè)為輸入時(shí),端口電壓為1/2VCC.                                       
;    COM I/O口設(shè)定高阻輸入&正常輸出.                                          
;                                                                             
;三. 使用方法:                                                                
;    由程序定時(shí)調(diào)用.                                                          
;                                                                             
;DATE:2005-02-24 ok                                                           
;=============================================================================*/

#define LCD_scan_bearing  LCD_scan_status.0     ;//掃描方向
#define common_amount 4     ;//common pin  定義COM口的數(shù)量  max=8

;//LCD顯示代碼寄存器
COM_port == 5    ;//PORT5=COM0--COM7