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憶往惜緣
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樓主  發(fā)表于: 2017-04-27 11:39
RS232訊用TXD和RXD發(fā)送和接收數據為什么第一次是對的，再發(fā)送和接收就不對了？ 重啟串口后發(fā)送接收又是對的，然后又不對了，請問(wèn)什么問(wèn)題呢   ， 難道每次發(fā)送接收后都要重啟串口？
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1樓  發(fā)表于: 2017-04-27 14:09
上位機 還是PLC  牌子 型號  最好上圖 讓人瞎猜嗎

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