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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Blocking write + read"><title>WriteRead in embedded_hal::blocking::i2c - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../../static.files/rustdoc-492a78a4a87dcc01.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="embedded_hal" data-themes="" data-resource-suffix="" data-rustdoc-version="1.82.0 (f6e511eec 2024-10-15)" data-channel="1.82.0" data-search-js="search-a99f1315e7cc5121.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../../static.files/storage-118b08c4c78b968e.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../../static.files/main-921df33f47b8780c.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-3b12f09e550e0385.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../../embedded_hal/index.html">embedded_<wbr>hal</a><span class="version">0.2.7</span></h2></div><h2 class="location"><a href="#">Write<wbr>Read</a></h2><div class="sidebar-elems"><section><h3><a href="#required-associated-types">Required Associated Types</a></h3><ul class="block"><li><a href="#associatedtype.Error">Error</a></li></ul><h3><a href="#required-methods">Required Methods</a></h3><ul class="block"><li><a href="#tymethod.write_read">write_read</a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><h2><a href="index.html">In embedded_<wbr>hal::<wbr>blocking::<wbr>i2c</a></h2></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1>Trait <a href="../../index.html">embedded_hal</a>::<wbr><a href="../index.html">blocking</a>::<wbr><a href="index.html">i2c</a>::<wbr><a class="trait" href="#">WriteRead</a><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><span class="out-of-band"><a class="src" href="../../../src/embedded_hal/blocking/i2c.rs.html#184-216">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub trait WriteRead<A: <a class="trait" href="trait.AddressMode.html" title="trait embedded_hal::blocking::i2c::AddressMode">AddressMode</a> = <a class="type" href="type.SevenBitAddress.html" title="type embedded_hal::blocking::i2c::SevenBitAddress">SevenBitAddress</a>> {
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type <a href="#associatedtype.Error" class="associatedtype">Error</a>;
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// Required method
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fn <a href="#tymethod.write_read" class="fn">write_read</a>(
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&mut self,
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address: A,
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bytes: &[<a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u8.html">u8</a>],
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buffer: &mut [<a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u8.html">u8</a>],
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) -> <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.unit.html">()</a>, Self::<a class="associatedtype" href="trait.WriteRead.html#associatedtype.Error" title="type embedded_hal::blocking::i2c::WriteRead::Error">Error</a>>;
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}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Blocking write + read</p>
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</div></details><h2 id="required-associated-types" class="section-header">Required Associated Types<a href="#required-associated-types" class="anchor">§</a></h2><div class="methods"><details class="toggle" open><summary><section id="associatedtype.Error" class="method"><a class="src rightside" href="../../../src/embedded_hal/blocking/i2c.rs.html#186">source</a><h4 class="code-header">type <a href="#associatedtype.Error" class="associatedtype">Error</a></h4></section></summary><div class="docblock"><p>Error type</p>
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</div></details></div><h2 id="required-methods" class="section-header">Required Methods<a href="#required-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="tymethod.write_read" class="method"><a class="src rightside" href="../../../src/embedded_hal/blocking/i2c.rs.html#210-215">source</a><h4 class="code-header">fn <a href="#tymethod.write_read" class="fn">write_read</a>(
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&mut self,
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address: A,
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bytes: &[<a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u8.html">u8</a>],
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buffer: &mut [<a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.u8.html">u8</a>],
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) -> <a class="enum" href="https://doc.rust-lang.org/1.82.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.82.0/core/primitive.unit.html">()</a>, Self::<a class="associatedtype" href="trait.WriteRead.html#associatedtype.Error" title="type embedded_hal::blocking::i2c::WriteRead::Error">Error</a>></h4></section></summary><div class="docblock"><p>Writes bytes to slave with address <code>address</code> and then reads enough bytes to fill <code>buffer</code> <em>in a
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single transaction</em></p>
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<h5 id="i2c-events-contract"><a class="doc-anchor" href="#i2c-events-contract">§</a>I2C Events (contract)</h5><div class="example-wrap"><pre class="language-text"><code>Master: ST SAD+W O0 O1 ... OM SR SAD+R MAK MAK ... NMAK SP
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Slave: SAK SAK SAK ... SAK SAK I0 I1 ... IN
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</code></pre></div>
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<p>Where</p>
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<ul>
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<li><code>ST</code> = start condition</li>
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<li><code>SAD+W</code> = slave address followed by bit 0 to indicate writing</li>
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<li><code>SAK</code> = slave acknowledge</li>
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<li><code>Oi</code> = ith outgoing byte of data</li>
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<li><code>SR</code> = repeated start condition</li>
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<li><code>SAD+R</code> = slave address followed by bit 1 to indicate reading</li>
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<li><code>Ii</code> = ith incoming byte of data</li>
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<li><code>MAK</code> = master acknowledge</li>
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<li><code>NMAK</code> = master no acknowledge</li>
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<li><code>SP</code> = stop condition</li>
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</ul>
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</div></details></div><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"></div><script src="../../../trait.impl/embedded_hal/blocking/i2c/trait.WriteRead.js" async></script></section></div></main></body></html>
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