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@@ -38,7 +38,9 @@ This enables fine-grained speed control, supports differential drive configurati
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Why Use __attribute((packed))?
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Why Use __attribute((packed))?
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The packed attribute tells the compiler not to add any padding between fields in memory. This makes the struct:
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ESP-NOW uses fixed-size data packets (up to 250 bytes). The *__attribute__((packed))* removes compiler-added padding for precise byte alignment.
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As *packed* attribute tells the compiler not to add any padding between fields in memory, this makes the struct:
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- Compact
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- Compact
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- Predictable for serialization over protocols like UART or ESP-NOW
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- Predictable for serialization over protocols like UART or ESP-NOW
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@@ -64,7 +64,8 @@ This enables fine-grained speed control, supports differential drive configurati
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</section>
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</section>
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<section id="why-use-attribute-packed">
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<section id="why-use-attribute-packed">
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<h2>Why Use __attribute((packed))?<a class="headerlink" href="#why-use-attribute-packed" title="Link to this heading">¶</a></h2>
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<h2>Why Use __attribute((packed))?<a class="headerlink" href="#why-use-attribute-packed" title="Link to this heading">¶</a></h2>
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<p>The packed attribute tells the compiler not to add any padding between fields in memory. This makes the struct:</p>
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<p>ESP-NOW uses fixed-size data packets (up to 250 bytes). The <em>__attribute__((packed))</em> removes compiler-added padding for precise byte alignment.</p>
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<p>As <em>packed</em> attribute tells the compiler not to add any padding between fields in memory, this makes the struct:</p>
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<blockquote>
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<blockquote>
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<div><ul class="simple">
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<div><ul class="simple">
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<li><p>Compact</p></li>
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<li><p>Compact</p></li>
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@@ -1,4 +1,4 @@
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# Sphinx build info version 1
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# Sphinx build info version 1
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# This file records the configuration used when building these files. When it is not found, a full rebuild will be done.
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# This file records the configuration used when building these files. When it is not found, a full rebuild will be done.
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config: 2a5d1949c3721836c34f0b73b9434126
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config: 73c850fc9da2302c95bfd56436e2cb64
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tags: 62a1e7829a13fc7881b6498c52484ec0
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tags: 62a1e7829a13fc7881b6498c52484ec0
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@@ -702,7 +702,18 @@ This enables fine-grained speed control, supports differential drive configurati
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</a>
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</a>
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</h3>
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</h3>
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<p>
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<p>
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The packed attribute tells the compiler not to add any padding between fields in memory. This makes the struct:
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ESP-NOW uses fixed-size data packets (up to 250 bytes). The
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<em>
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__attribute__((packed))
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</em>
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removes compiler-added padding for precise byte alignment.
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</p>
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<p>
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As
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<em>
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packed
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</em>
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attribute tells the compiler not to add any padding between fields in memory, this makes the struct:
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</p>
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</p>
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<blockquote>
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<blockquote>
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<div>
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<div>
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@@ -40,7 +40,7 @@ Why Use __attribute((packed))?
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ESP-NOW uses fixed-size data packets (up to 250 bytes). The *__attribute__((packed))* removes compiler-added padding for precise byte alignment.
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ESP-NOW uses fixed-size data packets (up to 250 bytes). The *__attribute__((packed))* removes compiler-added padding for precise byte alignment.
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As *packed* attribute tells the compiler not to add any padding between fields in memory. This makes the struct:
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As *packed* attribute tells the compiler not to add any padding between fields in memory, this makes the struct:
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- Compact
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- Compact
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- Predictable for serialization over protocols like UART or ESP-NOW
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- Predictable for serialization over protocols like UART or ESP-NOW
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