μC/OSIII——任务同步和通信（一）

Bertha 。 2022-08-05 02:57 156阅读 0赞

# [μC/OSIII——任务同步和通信（一） ][C_OSIII_] #

分类： [ μC/OSIII][_C_OSIII] 2014-10-15 17:01  31人阅读 [评论][Link 1](0) 收藏 [举报][Link 2]

[c][] [os][] [实例][Link 3]

***使用情况***

> 任务间通常涉及发送和接收，但是发送速度和接收速度要匹配，不然就出问题了，为了解决这个问题在通信的同时加上流量控制（同步）

***使用方法***

> 用一个信号量和消息队列，模型如下：
> 
> 通信发送：
> 
> > 等待接收完成信号；
> > 
> > 发送消息；
> 
> 通信接收：
> 
> > 等待发送消息；
> > 
> > 发送接收完成信号；

***使用实例***

<table> 
 <tbody> 
  <tr> 
   <td><pre style="width:35px">&lt;a target=_blank id="L1" href="http://blog.csdn.net/u011425150/article/details/40113307#L1" rel="#L1"&gt;   1&lt;/a&gt;
&lt;a target=_blank id="L2" href="http://blog.csdn.net/u011425150/article/details/40113307#L2" rel="#L2"&gt;   2&lt;/a&gt;
&lt;a target=_blank id="L3" href="http://blog.csdn.net/u011425150/article/details/40113307#L3" rel="#L3"&gt;   3&lt;/a&gt;
&lt;a target=_blank id="L4" href="http://blog.csdn.net/u011425150/article/details/40113307#L4" rel="#L4"&gt;   4&lt;/a&gt;
&lt;a target=_blank id="L5" href="http://blog.csdn.net/u011425150/article/details/40113307#L5" rel="#L5"&gt;   5&lt;/a&gt;
&lt;a target=_blank id="L6" href="http://blog.csdn.net/u011425150/article/details/40113307#L6" rel="#L6"&gt;   6&lt;/a&gt;
&lt;a target=_blank id="L7" href="http://blog.csdn.net/u011425150/article/details/40113307#L7" rel="#L7"&gt;   7&lt;/a&gt;
&lt;a target=_blank id="L8" href="http://blog.csdn.net/u011425150/article/details/40113307#L8" rel="#L8"&gt;   8&lt;/a&gt;
&lt;a target=_blank id="L9" href="http://blog.csdn.net/u011425150/article/details/40113307#L9" rel="#L9"&gt;   9&lt;/a&gt;
&lt;a target=_blank id="L10" href="http://blog.csdn.net/u011425150/article/details/40113307#L10" rel="#L10"&gt;  10&lt;/a&gt;
&lt;a target=_blank id="L11" href="http://blog.csdn.net/u011425150/article/details/40113307#L11" rel="#L11"&gt;  11&lt;/a&gt;
&lt;a target=_blank id="L12" href="http://blog.csdn.net/u011425150/article/details/40113307#L12" rel="#L12"&gt;  12&lt;/a&gt;
&lt;a target=_blank id="L13" href="http://blog.csdn.net/u011425150/article/details/40113307#L13" rel="#L13"&gt;  13&lt;/a&gt;
&lt;a target=_blank id="L14" href="http://blog.csdn.net/u011425150/article/details/40113307#L14" rel="#L14"&gt;  14&lt;/a&gt;
&lt;a target=_blank id="L15" href="http://blog.csdn.net/u011425150/article/details/40113307#L15" rel="#L15"&gt;  15&lt;/a&gt;
&lt;a target=_blank id="L16" href="http://blog.csdn.net/u011425150/article/details/40113307#L16" rel="#L16"&gt;  16&lt;/a&gt;
&lt;a target=_blank id="L17" href="http://blog.csdn.net/u011425150/article/details/40113307#L17" rel="#L17"&gt;  17&lt;/a&gt;
&lt;a target=_blank id="L18" href="http://blog.csdn.net/u011425150/article/details/40113307#L18" rel="#L18"&gt;  18&lt;/a&gt;
&lt;a target=_blank id="L19" href="http://blog.csdn.net/u011425150/article/details/40113307#L19" rel="#L19"&gt;  19&lt;/a&gt;
&lt;a target=_blank id="L20" href="http://blog.csdn.net/u011425150/article/details/40113307#L20" rel="#L20"&gt;  20&lt;/a&gt;
&lt;a target=_blank id="L21" href="http://blog.csdn.net/u011425150/article/details/40113307#L21" rel="#L21"&gt;  21&lt;/a&gt;
&lt;a target=_blank id="L22" href="http://blog.csdn.net/u011425150/article/details/40113307#L22" rel="#L22"&gt;  22&lt;/a&gt;
&lt;a target=_blank id="L23" href="http://blog.csdn.net/u011425150/article/details/40113307#L23" rel="#L23"&gt;  23&lt;/a&gt;
&lt;a target=_blank id="L24" href="http://blog.csdn.net/u011425150/article/details/40113307#L24" rel="#L24"&gt;  24&lt;/a&gt;
&lt;a target=_blank id="L25" href="http://blog.csdn.net/u011425150/article/details/40113307#L25" rel="#L25"&gt;  25&lt;/a&gt;
&lt;a target=_blank id="L26" href="http://blog.csdn.net/u011425150/article/details/40113307#L26" rel="#L26"&gt;  26&lt;/a&gt;
&lt;a target=_blank id="L27" href="http://blog.csdn.net/u011425150/article/details/40113307#L27" rel="#L27"&gt;  27&lt;/a&gt;
&lt;a target=_blank id="L28" href="http://blog.csdn.net/u011425150/article/details/40113307#L28" rel="#L28"&gt;  28&lt;/a&gt;
&lt;a target=_blank id="L29" href="http://blog.csdn.net/u011425150/article/details/40113307#L29" rel="#L29"&gt;  29&lt;/a&gt;
&lt;a target=_blank id="L30" href="http://blog.csdn.net/u011425150/article/details/40113307#L30" rel="#L30"&gt;  30&lt;/a&gt;
&lt;a target=_blank id="L31" href="http://blog.csdn.net/u011425150/article/details/40113307#L31" rel="#L31"&gt;  31&lt;/a&gt;
&lt;a target=_blank id="L32" href="http://blog.csdn.net/u011425150/article/details/40113307#L32" rel="#L32"&gt;  32&lt;/a&gt;
&lt;a target=_blank id="L33" href="http://blog.csdn.net/u011425150/article/details/40113307#L33" rel="#L33"&gt;  33&lt;/a&gt;
&lt;a target=_blank id="L34" href="http://blog.csdn.net/u011425150/article/details/40113307#L34" rel="#L34"&gt;  34&lt;/a&gt;
&lt;a target=_blank id="L35" href="http://blog.csdn.net/u011425150/article/details/40113307#L35" rel="#L35"&gt;  35&lt;/a&gt;
&lt;a target=_blank id="L36" href="http://blog.csdn.net/u011425150/article/details/40113307#L36" rel="#L36"&gt;  36&lt;/a&gt;
&lt;a target=_blank id="L37" href="http://blog.csdn.net/u011425150/article/details/40113307#L37" rel="#L37"&gt;  37&lt;/a&gt;
&lt;a target=_blank id="L38" href="http://blog.csdn.net/u011425150/article/details/40113307#L38" rel="#L38"&gt;  38&lt;/a&gt;
&lt;a target=_blank id="L39" href="http://blog.csdn.net/u011425150/article/details/40113307#L39" rel="#L39"&gt;  39&lt;/a&gt;
&lt;a target=_blank id="L40" href="http://blog.csdn.net/u011425150/article/details/40113307#L40" rel="#L40"&gt;  40&lt;/a&gt;
&lt;a target=_blank id="L41" href="http://blog.csdn.net/u011425150/article/details/40113307#L41" rel="#L41"&gt;  41&lt;/a&gt;
&lt;a target=_blank id="L42" href="http://blog.csdn.net/u011425150/article/details/40113307#L42" rel="#L42"&gt;  42&lt;/a&gt;
&lt;a target=_blank id="L43" href="http://blog.csdn.net/u011425150/article/details/40113307#L43" rel="#L43"&gt;  43&lt;/a&gt;
&lt;a target=_blank id="L44" href="http://blog.csdn.net/u011425150/article/details/40113307#L44" rel="#L44"&gt;  44&lt;/a&gt;
&lt;a target=_blank id="L45" href="http://blog.csdn.net/u011425150/article/details/40113307#L45" rel="#L45"&gt;  45&lt;/a&gt;
&lt;a target=_blank id="L46" href="http://blog.csdn.net/u011425150/article/details/40113307#L46" rel="#L46"&gt;  46&lt;/a&gt;
&lt;a target=_blank id="L47" href="http://blog.csdn.net/u011425150/article/details/40113307#L47" rel="#L47"&gt;  47&lt;/a&gt;
&lt;a target=_blank id="L48" href="http://blog.csdn.net/u011425150/article/details/40113307#L48" rel="#L48"&gt;  48&lt;/a&gt;
&lt;a target=_blank id="L49" href="http://blog.csdn.net/u011425150/article/details/40113307#L49" rel="#L49"&gt;  49&lt;/a&gt;
&lt;a target=_blank id="L50" href="http://blog.csdn.net/u011425150/article/details/40113307#L50" rel="#L50"&gt;  50&lt;/a&gt;
&lt;a target=_blank id="L51" href="http://blog.csdn.net/u011425150/article/details/40113307#L51" rel="#L51"&gt;  51&lt;/a&gt;
&lt;a target=_blank id="L52" href="http://blog.csdn.net/u011425150/article/details/40113307#L52" rel="#L52"&gt;  52&lt;/a&gt;
&lt;a target=_blank id="L53" href="http://blog.csdn.net/u011425150/article/details/40113307#L53" rel="#L53"&gt;  53&lt;/a&gt;
&lt;a target=_blank id="L54" href="http://blog.csdn.net/u011425150/article/details/40113307#L54" rel="#L54"&gt;  54&lt;/a&gt;
&lt;a target=_blank id="L55" href="http://blog.csdn.net/u011425150/article/details/40113307#L55" rel="#L55"&gt;  55&lt;/a&gt;
&lt;a target=_blank id="L56" href="http://blog.csdn.net/u011425150/article/details/40113307#L56" rel="#L56"&gt;  56&lt;/a&gt;
&lt;a target=_blank id="L57" href="http://blog.csdn.net/u011425150/article/details/40113307#L57" rel="#L57"&gt;  57&lt;/a&gt;
&lt;a target=_blank id="L58" href="http://blog.csdn.net/u011425150/article/details/40113307#L58" rel="#L58"&gt;  58&lt;/a&gt;
&lt;a target=_blank id="L59" href="http://blog.csdn.net/u011425150/article/details/40113307#L59" rel="#L59"&gt;  59&lt;/a&gt;
&lt;a target=_blank id="L60" href="http://blog.csdn.net/u011425150/article/details/40113307#L60" rel="#L60"&gt;  60&lt;/a&gt;
&lt;a target=_blank id="L61" href="http://blog.csdn.net/u011425150/article/details/40113307#L61" rel="#L61"&gt;  61&lt;/a&gt;
&lt;a target=_blank id="L62" href="http://blog.csdn.net/u011425150/article/details/40113307#L62" rel="#L62"&gt;  62&lt;/a&gt;
&lt;a target=_blank id="L63" href="http://blog.csdn.net/u011425150/article/details/40113307#L63" rel="#L63"&gt;  63&lt;/a&gt;
&lt;a target=_blank id="L64" href="http://blog.csdn.net/u011425150/article/details/40113307#L64" rel="#L64"&gt;  64&lt;/a&gt;
&lt;a target=_blank id="L65" href="http://blog.csdn.net/u011425150/article/details/40113307#L65" rel="#L65"&gt;  65&lt;/a&gt;
&lt;a target=_blank id="L66" href="http://blog.csdn.net/u011425150/article/details/40113307#L66" rel="#L66"&gt;  66&lt;/a&gt;
&lt;a target=_blank id="L67" href="http://blog.csdn.net/u011425150/article/details/40113307#L67" rel="#L67"&gt;  67&lt;/a&gt;
&lt;a target=_blank id="L68" href="http://blog.csdn.net/u011425150/article/details/40113307#L68" rel="#L68"&gt;  68&lt;/a&gt;
&lt;a target=_blank id="L69" href="http://blog.csdn.net/u011425150/article/details/40113307#L69" rel="#L69"&gt;  69&lt;/a&gt;
&lt;a target=_blank id="L70" href="http://blog.csdn.net/u011425150/article/details/40113307#L70" rel="#L70"&gt;  70&lt;/a&gt;
&lt;a target=_blank id="L71" href="http://blog.csdn.net/u011425150/article/details/40113307#L71" rel="#L71"&gt;  71&lt;/a&gt;
&lt;a target=_blank id="L72" href="http://blog.csdn.net/u011425150/article/details/40113307#L72" rel="#L72"&gt;  72&lt;/a&gt;
&lt;a target=_blank id="L73" href="http://blog.csdn.net/u011425150/article/details/40113307#L73" rel="#L73"&gt;  73&lt;/a&gt;
&lt;a target=_blank id="L74" href="http://blog.csdn.net/u011425150/article/details/40113307#L74" rel="#L74"&gt;  74&lt;/a&gt;
&lt;a target=_blank id="L75" href="http://blog.csdn.net/u011425150/article/details/40113307#L75" rel="#L75"&gt;  75&lt;/a&gt;
&lt;a target=_blank id="L76" href="http://blog.csdn.net/u011425150/article/details/40113307#L76" rel="#L76"&gt;  76&lt;/a&gt;
&lt;a target=_blank id="L77" href="http://blog.csdn.net/u011425150/article/details/40113307#L77" rel="#L77"&gt;  77&lt;/a&gt;
&lt;a target=_blank id="L78" href="http://blog.csdn.net/u011425150/article/details/40113307#L78" rel="#L78"&gt;  78&lt;/a&gt;
&lt;a target=_blank id="L79" href="http://blog.csdn.net/u011425150/article/details/40113307#L79" rel="#L79"&gt;  79&lt;/a&gt;
&lt;a target=_blank id="L80" href="http://blog.csdn.net/u011425150/article/details/40113307#L80" rel="#L80"&gt;  80&lt;/a&gt;
&lt;a target=_blank id="L81" href="http://blog.csdn.net/u011425150/article/details/40113307#L81" rel="#L81"&gt;  81&lt;/a&gt;
&lt;a target=_blank id="L82" href="http://blog.csdn.net/u011425150/article/details/40113307#L82" rel="#L82"&gt;  82&lt;/a&gt;
&lt;a target=_blank id="L83" href="http://blog.csdn.net/u011425150/article/details/40113307#L83" rel="#L83"&gt;  83&lt;/a&gt;
&lt;a target=_blank id="L84" href="http://blog.csdn.net/u011425150/article/details/40113307#L84" rel="#L84"&gt;  84&lt;/a&gt;
&lt;a target=_blank id="L85" href="http://blog.csdn.net/u011425150/article/details/40113307#L85" rel="#L85"&gt;  85&lt;/a&gt;
&lt;a target=_blank id="L86" href="http://blog.csdn.net/u011425150/article/details/40113307#L86" rel="#L86"&gt;  86&lt;/a&gt;
&lt;a target=_blank id="L87" href="http://blog.csdn.net/u011425150/article/details/40113307#L87" rel="#L87"&gt;  87&lt;/a&gt;
&lt;a target=_blank id="L88" href="http://blog.csdn.net/u011425150/article/details/40113307#L88" rel="#L88"&gt;  88&lt;/a&gt;
&lt;a target=_blank id="L89" href="http://blog.csdn.net/u011425150/article/details/40113307#L89" rel="#L89"&gt;  89&lt;/a&gt;
&lt;a target=_blank id="L90" href="http://blog.csdn.net/u011425150/article/details/40113307#L90" rel="#L90"&gt;  90&lt;/a&gt;
&lt;a target=_blank id="L91" href="http://blog.csdn.net/u011425150/article/details/40113307#L91" rel="#L91"&gt;  91&lt;/a&gt;
&lt;a target=_blank id="L92" href="http://blog.csdn.net/u011425150/article/details/40113307#L92" rel="#L92"&gt;  92&lt;/a&gt;
&lt;a target=_blank id="L93" href="http://blog.csdn.net/u011425150/article/details/40113307#L93" rel="#L93"&gt;  93&lt;/a&gt;
&lt;a target=_blank id="L94" href="http://blog.csdn.net/u011425150/article/details/40113307#L94" rel="#L94"&gt;  94&lt;/a&gt;
&lt;a target=_blank id="L95" href="http://blog.csdn.net/u011425150/article/details/40113307#L95" rel="#L95"&gt;  95&lt;/a&gt;
&lt;a target=_blank id="L96" href="http://blog.csdn.net/u011425150/article/details/40113307#L96" rel="#L96"&gt;  96&lt;/a&gt;
&lt;a target=_blank id="L97" href="http://blog.csdn.net/u011425150/article/details/40113307#L97" rel="#L97"&gt;  97&lt;/a&gt;
&lt;a target=_blank id="L98" href="http://blog.csdn.net/u011425150/article/details/40113307#L98" rel="#L98"&gt;  98&lt;/a&gt;
&lt;a target=_blank id="L99" href="http://blog.csdn.net/u011425150/article/details/40113307#L99" rel="#L99"&gt;  99&lt;/a&gt;
&lt;a target=_blank id="L100" href="http://blog.csdn.net/u011425150/article/details/40113307#L100" rel="#L100"&gt; 100&lt;/a&gt;
&lt;a target=_blank id="L101" href="http://blog.csdn.net/u011425150/article/details/40113307#L101" rel="#L101"&gt; 101&lt;/a&gt;
&lt;a target=_blank id="L102" href="http://blog.csdn.net/u011425150/article/details/40113307#L102" rel="#L102"&gt; 102&lt;/a&gt;
&lt;a target=_blank id="L103" href="http://blog.csdn.net/u011425150/article/details/40113307#L103" rel="#L103"&gt; 103&lt;/a&gt;
&lt;a target=_blank id="L104" href="http://blog.csdn.net/u011425150/article/details/40113307#L104" rel="#L104"&gt; 104&lt;/a&gt;
&lt;a target=_blank id="L105" href="http://blog.csdn.net/u011425150/article/details/40113307#L105" rel="#L105"&gt; 105&lt;/a&gt;
&lt;a target=_blank id="L106" href="http://blog.csdn.net/u011425150/article/details/40113307#L106" rel="#L106"&gt; 106&lt;/a&gt;
&lt;a target=_blank id="L107" href="http://blog.csdn.net/u011425150/article/details/40113307#L107" rel="#L107"&gt; 107&lt;/a&gt;
&lt;a target=_blank id="L108" href="http://blog.csdn.net/u011425150/article/details/40113307#L108" rel="#L108"&gt; 108&lt;/a&gt;
&lt;a target=_blank id="L109" href="http://blog.csdn.net/u011425150/article/details/40113307#L109" rel="#L109"&gt; 109&lt;/a&gt;
&lt;a target=_blank id="L110" href="http://blog.csdn.net/u011425150/article/details/40113307#L110" rel="#L110"&gt; 110&lt;/a&gt;
&lt;a target=_blank id="L111" href="http://blog.csdn.net/u011425150/article/details/40113307#L111" rel="#L111"&gt; 111&lt;/a&gt;
&lt;a target=_blank id="L112" href="http://blog.csdn.net/u011425150/article/details/40113307#L112" rel="#L112"&gt; 112&lt;/a&gt;
&lt;a target=_blank id="L113" href="http://blog.csdn.net/u011425150/article/details/40113307#L113" rel="#L113"&gt; 113&lt;/a&gt;
&lt;a target=_blank id="L114" href="http://blog.csdn.net/u011425150/article/details/40113307#L114" rel="#L114"&gt; 114&lt;/a&gt;
&lt;a target=_blank id="L115" href="http://blog.csdn.net/u011425150/article/details/40113307#L115" rel="#L115"&gt; 115&lt;/a&gt;
&lt;a target=_blank id="L116" href="http://blog.csdn.net/u011425150/article/details/40113307#L116" rel="#L116"&gt; 116&lt;/a&gt;
&lt;a target=_blank id="L117" href="http://blog.csdn.net/u011425150/article/details/40113307#L117" rel="#L117"&gt; 117&lt;/a&gt;
&lt;a target=_blank id="L118" href="http://blog.csdn.net/u011425150/article/details/40113307#L118" rel="#L118"&gt; 118&lt;/a&gt;
&lt;a target=_blank id="L119" href="http://blog.csdn.net/u011425150/article/details/40113307#L119" rel="#L119"&gt; 119&lt;/a&gt;
&lt;a target=_blank id="L120" href="http://blog.csdn.net/u011425150/article/details/40113307#L120" rel="#L120"&gt; 120&lt;/a&gt;
&lt;a target=_blank id="L121" href="http://blog.csdn.net/u011425150/article/details/40113307#L121" rel="#L121"&gt; 121&lt;/a&gt;
&lt;a target=_blank id="L122" href="http://blog.csdn.net/u011425150/article/details/40113307#L122" rel="#L122"&gt; 122&lt;/a&gt;
&lt;a target=_blank id="L123" href="http://blog.csdn.net/u011425150/article/details/40113307#L123" rel="#L123"&gt; 123&lt;/a&gt;
&lt;a target=_blank id="L124" href="http://blog.csdn.net/u011425150/article/details/40113307#L124" rel="#L124"&gt; 124&lt;/a&gt;
&lt;a target=_blank id="L125" href="http://blog.csdn.net/u011425150/article/details/40113307#L125" rel="#L125"&gt; 125&lt;/a&gt;
&lt;a target=_blank id="L126" href="http://blog.csdn.net/u011425150/article/details/40113307#L126" rel="#L126"&gt; 126&lt;/a&gt;
&lt;a target=_blank id="L127" href="http://blog.csdn.net/u011425150/article/details/40113307#L127" rel="#L127"&gt; 127&lt;/a&gt;
&lt;a target=_blank id="L128" href="http://blog.csdn.net/u011425150/article/details/40113307#L128" rel="#L128"&gt; 128&lt;/a&gt;
&lt;a target=_blank id="L129" href="http://blog.csdn.net/u011425150/article/details/40113307#L129" rel="#L129"&gt; 129&lt;/a&gt;
&lt;a target=_blank id="L130" href="http://blog.csdn.net/u011425150/article/details/40113307#L130" rel="#L130"&gt; 130&lt;/a&gt;
&lt;a target=_blank id="L131" href="http://blog.csdn.net/u011425150/article/details/40113307#L131" rel="#L131"&gt; 131&lt;/a&gt;
&lt;a target=_blank id="L132" href="http://blog.csdn.net/u011425150/article/details/40113307#L132" rel="#L132"&gt; 132&lt;/a&gt;
&lt;a target=_blank id="L133" href="http://blog.csdn.net/u011425150/article/details/40113307#L133" rel="#L133"&gt; 133&lt;/a&gt;
&lt;a target=_blank id="L134" href="http://blog.csdn.net/u011425150/article/details/40113307#L134" rel="#L134"&gt; 134&lt;/a&gt;
&lt;a target=_blank id="L135" href="http://blog.csdn.net/u011425150/article/details/40113307#L135" rel="#L135"&gt; 135&lt;/a&gt;
&lt;a target=_blank id="L136" href="http://blog.csdn.net/u011425150/article/details/40113307#L136" rel="#L136"&gt; 136&lt;/a&gt;
&lt;a target=_blank id="L137" href="http://blog.csdn.net/u011425150/article/details/40113307#L137" rel="#L137"&gt; 137&lt;/a&gt;
&lt;a target=_blank id="L138" href="http://blog.csdn.net/u011425150/article/details/40113307#L138" rel="#L138"&gt; 138&lt;/a&gt;
&lt;a target=_blank id="L139" href="http://blog.csdn.net/u011425150/article/details/40113307#L139" rel="#L139"&gt; 139&lt;/a&gt;
&lt;a target=_blank id="L140" href="http://blog.csdn.net/u011425150/article/details/40113307#L140" rel="#L140"&gt; 140&lt;/a&gt;
&lt;a target=_blank id="L141" href="http://blog.csdn.net/u011425150/article/details/40113307#L141" rel="#L141"&gt; 141&lt;/a&gt;
&lt;a target=_blank id="L142" href="http://blog.csdn.net/u011425150/article/details/40113307#L142" rel="#L142"&gt; 142&lt;/a&gt;
&lt;a target=_blank id="L143" href="http://blog.csdn.net/u011425150/article/details/40113307#L143" rel="#L143"&gt; 143&lt;/a&gt;
&lt;a target=_blank id="L144" href="http://blog.csdn.net/u011425150/article/details/40113307#L144" rel="#L144"&gt; 144&lt;/a&gt;
&lt;a target=_blank id="L145" href="http://blog.csdn.net/u011425150/article/details/40113307#L145" rel="#L145"&gt; 145&lt;/a&gt;
&lt;a target=_blank id="L146" href="http://blog.csdn.net/u011425150/article/details/40113307#L146" rel="#L146"&gt; 146&lt;/a&gt;
&lt;a target=_blank id="L147" href="http://blog.csdn.net/u011425150/article/details/40113307#L147" rel="#L147"&gt; 147&lt;/a&gt;</pre></td> 
   <td> 
    <div> 
     <pre>
             
              
      <div>
       
               
              #define  APP_TASK_START_PRIO                               4u
             
              
      </div>
             
              
      <div>
       
               
              #define  APP_TASK_1_PRIO                                   6u
             
              
      </div>
             
              
      <div>
       
               
              #define  APP_TASK_2_PRIO                                   5u
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              #define  APP_TASK_START_STK_SIZE                         256u
             
              
      </div>
             
              
      <div>
       
               
              #define  APP_TASK_1_STK_SIZE                             256u
             
              
      </div>
             
              
      <div>
       
               
              #define  APP_TASK_2_STK_SIZE                             256u
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              static  OS_TCB   AppTaskStartTCB;
             
              
      </div>
             
              
      <div>
       
               
              static  OS_TCB   AppTask1TCB;
             
              
      </div>
             
              
      <div>
       
               
              static  OS_TCB   AppTask2TCB;
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              static  OS_Q   MY_Q;
             
              
      </div>
             
              
      <div>
       
               
              static  OS_SEM MY_SEM;
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              static  CPU_STK  AppTaskStartStk[APP_TASK_START_STK_SIZE];
             
              
      </div>
             
              
      <div>
       
               
              static  CPU_STK  AppTask1Stk[APP_TASK_1_STK_SIZE];
             
              
      </div>
             
              
      <div>
       
               
              static  CPU_STK  AppTask2Stk[APP_TASK_2_STK_SIZE];
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              static  void  AppTaskStart(void  *p_arg);
             
              
      </div>
             
              
      <div>
       
               
              void AppTask1(void *p_arg);
             
              
      </div>
             
              
      <div>
       
               
              void AppTask2(void *p_arg);
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              void *BLOCK1 = "Task1 is comunicating with Task2";
             
              
      </div>
             
              
      <div>
       
               
              void *BLOCK2;
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              int  main (void)
             
              
      </div>
             
              
      <div>
       
               
              {
             
              
      </div>
             
              
      <div>
       
               
                  OS_ERR  err;
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>

</div>
             
              
      <div>
       
               
                  OSInit(&amp;err);                                               
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              	OSQCreate((OS_Q     *)&amp;MY_Q,
             
              
      </div>
             
              
      <div>
       
               
              			  (CPU_CHAR *)"MY_Q",
             
              
      </div>
             
              
      <div>
       
               
              			  (OS_MSG_QTY)10,
             
              
      </div>
             
              
      <div>
       
               
              			  (OS_ERR   *)&amp;err);
             
              
      </div>
             
              
      <div>
       
               
              	OSSemCreate((OS_SEM    *)&amp;MY_SEM,
             
              
      </div>
             
              
      <div>
       
               
              				(CPU_CHAR  *)"MY_SEM",
             
              
      </div>
             
              
      <div>
       
               
              				(OS_SEM_CTR )1,                                  //信号量初始值为1
             
              
      </div>
             
              
      <div>
       
               
              				(OS_ERR    *)&amp;err);
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
                  OSTaskCreate((OS_TCB     *)&amp;AppTaskStartTCB,                
             
              
      </div>
             
              
      <div>
       
               
                               (CPU_CHAR   *)"App Task Start",
             
              
      </div>
             
              
      <div>
       
               
                               (OS_TASK_PTR ) AppTaskStart,
             
              
      </div>
             
              
      <div>
       
               
                               (void       *) 0,
             
              
      </div>
             
              
      <div>
       
               
                               (OS_PRIO     ) APP_TASK_START_PRIO,
             
              
      </div>
             
              
      <div>
       
               
                               (CPU_STK    *)&amp;AppTaskStartStk[0],
             
              
      </div>
             
              
      <div>
       
               
                               (CPU_STK_SIZE) APP_TASK_START_STK_SIZE / 10u,
             
              
      </div>
             
              
      <div>
       
               
                               (CPU_STK_SIZE) APP_TASK_START_STK_SIZE,
             
              
      </div>
             
              
      <div>
       
               
                               (OS_MSG_QTY  ) 0u,
             
              
      </div>
             
              
      <div>
       
               
                               (OS_TICK     ) 0u,
             
              
      </div>
             
              
      <div>
       
               
                               (void       *) 0,
             
              
      </div>
             
              
      <div>
       
               
                               (OS_OPT      )(OS_OPT_TASK_STK_CHK | OS_OPT_TASK_STK_CLR),
             
              
      </div>
             
              
      <div>
       
               
                               (OS_ERR     *)&amp;err);
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
                  OSStart(&amp;err);                                              
             
              
      </div>
             
              
      <div>
       
               
              }
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              static  void  AppTaskStart (void *p_arg)
             
              
      </div>
             
              
      <div>
       
               
              {
             
              
      </div>
             
              
      <div>
       
               
                  OS_ERR  err;
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>

</div>
             
              
      <div>
       
               
                 (void)p_arg;
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
                  CPU_Init();                                                
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              	OSTaskCreate((OS_TCB     *)&amp;AppTask1TCB,               
             
              
      </div>
             
              
      <div>
       
               
              				(CPU_CHAR   *)"AppTask1",
             
              
      </div>
             
              
      <div>
       
               
              				(OS_TASK_PTR)AppTask1,
             
              
      </div>
             
              
      <div>
       
               
              				(void       *)0,
             
              
      </div>
             
              
      <div>
       
               
              				(OS_PRIO)APP_TASK_1_PRIO,
             
              
      </div>
             
              
      <div>
       
               
              				(CPU_STK    *)&amp;AppTask1Stk[0],
             
              
      </div>
             
              
      <div>
       
               
              				(CPU_STK_SIZE)APP_TASK_1_STK_SIZE / 10u,
             
              
      </div>
             
              
      <div>
       
               
              				(CPU_STK_SIZE)APP_TASK_1_STK_SIZE,
             
              
      </div>
             
              
      <div>
       
               
              				(OS_MSG_QTY)0u,
             
              
      </div>
             
              
      <div>
       
               
              				(OS_TICK)0u,
             
              
      </div>
             
              
      <div>
       
               
              				(void       *)0,
             
              
      </div>
             
              
      <div>
       
               
              				(OS_OPT)(OS_OPT_TASK_STK_CHK | OS_OPT_TASK_STK_CLR),
             
              
      </div>
             
              
      <div>
       
               
              				(OS_ERR     *)&amp;err);
             
              
      </div>
             
              
      <div>
       
               
              	OSTaskCreate((OS_TCB     *)&amp;AppTask2TCB,
             
              
      </div>
             
              
      <div>
       
               
              				(CPU_CHAR   *)"AppTask2",
             
              
      </div>
             
              
      <div>
       
               
              				(OS_TASK_PTR)AppTask2,
             
              
      </div>
             
              
      <div>
       
               
              				(void       *)0,
             
              
      </div>
             
              
      <div>
       
               
              				(OS_PRIO)APP_TASK_2_PRIO,
             
              
      </div>
             
              
      <div>
       
               
              				(CPU_STK    *)&amp;AppTask2Stk[0],
             
              
      </div>
             
              
      <div>
       
               
              				(CPU_STK_SIZE)APP_TASK_2_STK_SIZE / 10u,
             
              
      </div>
             
              
      <div>
       
               
              				(CPU_STK_SIZE)APP_TASK_2_STK_SIZE,
             
              
      </div>
             
              
      <div>
       
               
              				(OS_MSG_QTY)0u,
             
              
      </div>
             
              
      <div>
       
               
              				(OS_TICK)0u,
             
              
      </div>
             
              
      <div>
       
               
              				(void       *)0,
             
              
      </div>
             
              
      <div>
       
               
              				(OS_OPT)(OS_OPT_TASK_STK_CHK | OS_OPT_TASK_STK_CLR),
             
              
      </div>
             
              
      <div>
       
               
              				(OS_ERR     *)&amp;err);
             
              
      </div>
             
              
      <div>
       
               
              }
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              void AppTask1(void *p_arg)
             
              
      </div>
             
              
      <div>
       
               
              {
             
              
      </div>
             
              
      <div>
       
               
              	OS_ERR  err;
             
              
      </div>
             
              
      <div>
       
               
              	CPU_TS ts;
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              	(void)p_arg;
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              	while (DEF_ON){
             
              
      </div>
             
              
      <div>
       
               
              		OSSemPend((OS_SEM   *)&amp;MY_SEM,
             
              
      </div>
             
              
      <div>
       
               
              				  (OS_TICK   )0,
             
              
      </div>
             
              
      <div>
       
               
              				  (OS_OPT    )OS_OPT_PEND_BLOCKING,
             
              
      </div>
             
              
      <div>
       
               
              			      (CPU_TS   *)&amp;ts,
             
              
      </div>
             
              
      <div>
       
               
              				  (OS_ERR   *)&amp;err);
             
              
      </div>
             
              
      <div>
       
               
              		APP_TRACE_DBG(("Task1 is running...\n\r"));
             
              
      </div>
             
              
      <div>
       
               
              		OSQPost((OS_Q      *)&amp;MY_Q,
             
              
      </div>
             
              
      <div>
       
               
              				(void      *)BLOCK1,
             
              
      </div>
             
              
      <div>
       
               
              				(OS_MSG_SIZE)sizeof(BLOCK1),
             
              
      </div>
             
              
      <div>
       
               
              				(OS_OPT     )OS_OPT_POST_FIFO,
             
              
      </div>
             
              
      <div>
       
               
              				(OS_ERR    *)&amp;err);
             
              
      </div>
             
              
      <div>
       
               
              		OSTimeDlyHMSM(0, 0, 1, 0, OS_OPT_TIME_DLY, &amp;err);
             
              
      </div>
             
              
      <div>
       
               
              	}
             
              
      </div>
             
              
      <div>
       
               
              }
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              void AppTask2(void *p_arg)
             
              
      </div>
             
              
      <div>
       
               
              {
             
              
      </div>
             
              
      <div>
       
               
              	OS_ERR  err;
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              	OS_MSG_SIZE size;
             
              
      </div>
             
              
      <div>
       
               
              	CPU_TS ts;
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              	(void)p_arg;
             
              
      </div>
             
              
      <div>

</div>
             
              
      <div>
       
               
              	while (DEF_ON){
             
              
      </div>
             
              
      <div>
       
               
              		BLOCK2=OSQPend((OS_Q       *)&amp;MY_Q,
             
              
      </div>
             
              
      <div>
       
               
              					   (OS_TICK     )0,
             
              
      </div>
             
              
      <div>
       
               
              					   (OS_OPT      )OS_OPT_PEND_BLOCKING,
             
              
      </div>
             
              
      <div>
       
               
              					   (OS_MSG_SIZE*)&amp;size,
             
              
      </div>
             
              
      <div>
       
               
              					   (CPU_TS      )&amp;ts,
             
              
      </div>
             
              
      <div>
       
               
              					   (OS_ERR     *)&amp;err);
             
              
      </div>
             
              
      <div>
       
               
              		APP_TRACE_DBG(("Task2 is running...\n\r"));
             
              
      </div>
             
              
      <div>
       
               
              		APP_TRACE_DBG(("%s...\n\r",BLOCK2));
             
              
      </div>
             
              
      <div>
       
               
              		OSSemPost((OS_SEM  *)&amp;MY_SEM,
             
              
      </div>
             
              
      <div>
       
               
              				  (OS_OPT   )OS_OPT_POST_1,
             
              
      </div>
             
              
      <div>
       
               
              				  (OS_ERR  *)&amp;err);
             
              
      </div>
             
              
      <div>
       
               
              		OSTimeDlyHMSM(0, 0, 1, 0, OS_OPT_TIME_DLY, &amp;err);
             
              
      </div>
             
              
      <div>
       
               
              	}
             
              
      </div>
             
              
      <div>
       
               
              }
             
              
      </div></pre> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

##### [来自CODE的代码片][CODE]  SEM-AND-Q #####

***实验结果***

信号量初始值为1

![Center][]

信号量初始值为0

![Center 1][]

锁死状态

[C_OSIII_]: http://blog.csdn.net/u011425150/article/details/40113307
[_C_OSIII]: http://blog.csdn.net/u011425150/article/category/2633987
[Link 1]: http://blog.csdn.net/u011425150/article/details/40113307#comments
[Link 2]: http://blog.csdn.net/u011425150/article/details/40113307#report
[c]: http://www.csdn.net/tag/c
[os]: http://www.csdn.net/tag/os
[Link 3]: http://www.csdn.net/tag/%e5%ae%9e%e4%be%8b
[CODE]: https://code.csdn.net/snippets/484885
[Center]: /images/20220805/99f6baced8324ede86705f14b2070efd.png
[Center 1]: /images/20220805/84e0d7fed06745e99da6152687cf2f16.png