比较经典的中断串口接口的方法

最新推荐文章于 2025-09-19 19:25:55 发布

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本文介绍了一种基于已知数据包头和长度的UART数据包解析方法，通过状态机方式接收并验证数据包，适用于无需校验的过程。

此方法是在知道数据包的包头和数据长度的基础上实现，没有校验过程。

        extern uint8 cmd[12+1+1];
         static uint8 cnt = 0;

<code class="hljs bash has-numbering" style="background: none; padding: 0px; border-radius: 0px; color: inherit; font-family: 'Source Code Pro', monospace;font-size:undefined; display: block; white-space: pre; word-wrap: normal; box-sizing: border-box;"> uint8 <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">in</span>;

<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>(RxUart(&<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">in</span>,<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span>))
{
   <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>(cnt == <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>)
   {
       <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">in</span> == 头地址)
       {
           cmd[cnt] = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">in</span>;
           cnt = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span>;
       }
   }
   <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span>
   {
       cmd[cnt] = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">in</span>;
       cnt++;
       <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span>(cnt == <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">13</span>)
       {
           <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> ( cmd[cnt]  == 包尾)
           {

           }
           cnt = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>;
       }
    }
}

</code><ul class="pre-numbering" style="list-style: none; margin: 0px; padding: 6px 0px 40px; left: 0px; top: 0px; width: 50px; text-align: right; border-right-color: rgb(221, 221, 221); border-right-width: 1px; border-right-style: solid; position: absolute; box-sizing: border-box; background-color: rgb(238, 238, 238);"><li style="padding: 0px 5px; box-sizing: border-box;">1</li><li style="padding: 0px 5px; box-sizing: border-box;">2</li><li style="padding: 0px 5px; box-sizing: border-box;">3</li><li style="padding: 0px 5px; box-sizing: border-box;">4</li><li style="padding: 0px 5px; box-sizing: border-box;">5</li><li style="padding: 0px 5px; box-sizing: border-box;">6</li><li style="padding: 0px 5px; box-sizing: border-box;">7</li><li style="padding: 0px 5px; box-sizing: border-box;">8</li><li style="padding: 0px 5px; box-sizing: border-box;">9</li><li style="padding: 0px 5px; box-sizing: border-box;">10</li><li style="padding: 0px 5px; box-sizing: border-box;">11</li><li style="padding: 0px 5px; box-sizing: border-box;">12</li><li style="padding: 0px 5px; box-sizing: border-box;">13</li><li style="padding: 0px 5px; box-sizing: border-box;">14</li><li style="padding: 0px 5px; box-sizing: border-box;">15</li><li style="padding: 0px 5px; box-sizing: border-box;">16</li><li style="padding: 0px 5px; box-sizing: border-box;">17</li><li style="padding: 0px 5px; box-sizing: border-box;">18</li><li style="padding: 0px 5px; box-sizing: border-box;">19</li><li style="padding: 0px 5px; box-sizing: border-box;">20</li><li style="padding: 0px 5px; box-sizing: border-box;">21</li><li style="padding: 0px 5px; box-sizing: border-box;">22</li><li style="padding: 0px 5px; box-sizing: border-box;">23</li><li style="padding: 0px 5px; box-sizing: border-box;">24</li><li style="padding: 0px 5px; box-sizing: border-box;">25</li><li style="padding: 0px 5px; box-sizing: border-box;">26</li><li style="padding: 0px 5px; box-sizing: border-box;">27</li><li style="padding: 0px 5px; box-sizing: border-box;">28</li></ul><div class="save_code tracking-ad" style="top: 5px; height: 60px; right: 30px; color: rgb(255, 255, 255); font-size: 14px; display: block; position: absolute; z-index: 2; cursor: pointer; box-sizing: border-box;" data-mod="popu_249"><a target=_blank style="color: rgb(106, 57, 6); text-decoration: none; box-sizing: border-box;" href="javascript:;"><img style="border: currentColor; max-width: 100%; box-sizing: border-box;" src="http://static.blog.youkuaiyun.com/images/save_snippets.png" alt="" /></a></div><ul class="pre-numbering" style="list-style: none; margin: 0px; padding: 6px 0px 40px; left: 0px; top: 0px; width: 50px; text-align: right; border-right-color: rgb(221, 221, 221); border-right-width: 1px; border-right-style: solid; position: absolute; box-sizing: border-box; background-color: rgb(238, 238, 238);"><li style="padding: 0px 5px; box-sizing: border-box;">1</li><li style="padding: 0px 5px; box-sizing: border-box;">2</li><li style="padding: 0px 5px; box-sizing: border-box;">3</li><li style="padding: 0px 5px; box-sizing: border-box;">4</li><li style="padding: 0px 5px; box-sizing: border-box;">5</li><li style="padding: 0px 5px; box-sizing: border-box;">6</li><li style="padding: 0px 5px; box-sizing: border-box;">7</li><li style="padding: 0px 5px; box-sizing: border-box;">8</li><li style="padding: 0px 5px; box-sizing: border-box;">9</li><li style="padding: 0px 5px; box-sizing: border-box;">10</li><li style="padding: 0px 5px; box-sizing: border-box;">11</li><li style="padding: 0px 5px; box-sizing: border-box;">12</li><li style="padding: 0px 5px; box-sizing: border-box;">13</li><li style="padding: 0px 5px; box-sizing: border-box;">14</li><li style="padding: 0px 5px; box-sizing: border-box;">15</li><li style="padding: 0px 5px; box-sizing: border-box;">16</li><li style="padding: 0px 5px; box-sizing: border-box;">17</li><li style="padding: 0px 5px; box-sizing: border-box;">18</li><li style="padding: 0px 5px; box-sizing: border-box;">19</li><li style="padding: 0px 5px; box-sizing: border-box;">20</li><li style="padding: 0px 5px; box-sizing: border-box;">21</li><li style="padding: 0px 5px; box-sizing: border-box;">22</li><li style="padding: 0px 5px; box-sizing: border-box;">23</li><li style="padding: 0px 5px; box-sizing: border-box;">24</li><li style="padding: 0px 5px; box-sizing: border-box;">25</li><li style="padding: 0px 5px; box-sizing: border-box;">26</li><li style="padding: 0px 5px; box-sizing: border-box;">27</li><li style="padding: 0px 5px; box-sizing: border-box;">28</li></ul>