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pc机通过串口连DM6446板子，上电电脑就死机了，鼠标很键盘都死了，昨天还能在pc上跑的，然后今天就突然死了，用其他的pc机连过这块板子运行正常，想请问下是什么原因呢
先看看电脑上的串口还能使用吗？用一些小程序发送接收一下数据试试。
