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liuleihb
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樓主  發(fā)表于: 2009-08-27 20:23
串行通訊模塊現在使用了無(wú)順序協(xié)議與條形閱讀器通訊,現在要用 INPUT 指令接收數據
需要一個(gè)接收讀取請求信號,X3/XA  請問(wèn)X3/XA ON的時(shí)機
[ 此帖被liuleihb在2009-08-27 20:30重新編輯 ]
daizhi
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1樓  發(fā)表于: 2009-08-27 22:35
以下三者之一滿(mǎn)足就行:
1:接收到指定的字長(cháng).
2:已到指定的監控時(shí)間.
3:接受到指定的代碼.

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