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# README |
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```html |
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进中断: |
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发送缓冲器空中断 |
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接收缓冲器满中断 |
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接收帧错误中断 |
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这三个中断一直为真 |
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``` |
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## BUG现象 |
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 |
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``` |
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当着这几根线连接开发板时,按键使用正常 |
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当着这几根线不连接开发板时,按键按下后,会有1s作用的延时 |
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``` |
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## 如何解决 |
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