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      <description>万万没想到！</description>
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      <pubDate>2018-04-09 16:13:43 UTC</pubDate>
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         <title>PS2协议的问题</title>
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         <description><![CDATA[<div>PS2协议类似I2C，有一位读ACK信号，这时候要求Master端先释放数据线。我们代码里先把数据线拉高了，然后设置成输入口，造成非常偶发的通信失败错误。</div>]]></description>
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         <title>I2C器件地址冲突</title>
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         <description><![CDATA[<div>机器内部I2C总线和机器外部I2C总线不要共用，会存在机器内部I2C从器件地址和机器外部I2C从器件地址冲突，引发通信异常问题。</div>]]></description>
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         <pubDate>2019-01-09 14:02:25 UTC</pubDate>
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