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<div class="title">xMessageBufferCreateStatic</div> </div>
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<p><a class="el" href="message__buffer_8h.html">message_buffer.h</a></p>
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<pre>
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MessageBufferHandle_t xMessageBufferCreateStatic( size_t xBufferSizeBytes,
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uint8_t *pucMessageBufferStorageArea,
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StaticMessageBuffer_t *pxStaticMessageBuffer );
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</pre><p> Creates a new message buffer using statically allocated memory. See <a class="el" href="message__buffer_8h.html#a2959cd0e3d2bd20d46908e5c9872be36">xMessageBufferCreate()</a> for a version that uses dynamically allocated memory.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">xBufferSizeBytes</td><td>The size, in bytes, of the buffer pointed to by the pucMessageBufferStorageArea parameter. When a message is written to the message buffer an additional sizeof( size_t ) bytes are also written to store the message's length. sizeof( size_t ) is typically 4 bytes on a 32-bit architecture, so on most 32-bit architecture a 10 byte message will take up 14 bytes of message buffer space. The maximum number of bytes that can be stored in the message buffer is actually (xBufferSizeBytes - 1).</td></tr>
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<tr><td class="paramname">pucMessageBufferStorageArea</td><td>Must point to a uint8_t array that is at least xBufferSizeBytes + 1 big. This is the array to which messages are copied when they are written to the message buffer.</td></tr>
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<tr><td class="paramname">pxStaticMessageBuffer</td><td>Must point to a variable of type StaticMessageBuffer_t, which will be used to hold the message buffer's data structure.</td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>If the message buffer is created successfully then a handle to the created message buffer is returned. If either pucMessageBufferStorageArea or pxStaticmessageBuffer are NULL then NULL is returned.</dd></dl>
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<p>Example use: </p><pre></pre><pre>// Used to dimension the array used to hold the messages. The available space
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// will actually be one less than this, so 999.
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#define STORAGE_SIZE_BYTES 1000</pre><pre>// Defines the memory that will actually hold the messages within the message
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// buffer.
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static uint8_t ucStorageBuffer[ STORAGE_SIZE_BYTES ];</pre><pre>// The variable used to hold the message buffer structure.
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StaticMessageBuffer_t xMessageBufferStruct;</pre><pre>void MyFunction( void )
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{
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MessageBufferHandle_t xMessageBuffer;</pre><pre> xMessageBuffer = xMessageBufferCreateStatic( sizeof( ucBufferStorage ),
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ucBufferStorage,
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&xMessageBufferStruct );</pre><pre> // As neither the pucMessageBufferStorageArea or pxStaticMessageBuffer
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// parameters were NULL, xMessageBuffer will not be NULL, and can be used to
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// reference the created message buffer in other message buffer API calls.</pre><pre> // Other code that uses the message buffer can go here.
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}</pre><pre></pre> </div><!-- contents -->
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