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如图，一运行/sbin/getty 115200 tty1，屏幕就会输出@^@^@^@^@^
请问这是什么原因，怎么消除？
是不是串口配置参数有问题，换个波特率呢？
貌似不是官网的开发板和demo系统。建议咨询下卖家。
