docs(lab): 更正 PRAM 写归因为从站侧成本;lan9252_pm 加 pmHold 看门狗豁免
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@@ -252,7 +252,7 @@ footer code{font-size:11px}
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<div class="pills">
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<span class="pill">真源 <b>ethercat_can_bridge.h</b></span>
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<span class="pill">尺寸 <b>ethercat_pdo_size.h</b></span>
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<span class="pill">PRAM <b>0.441 µs/B</b></span>
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<span class="pill">PRAM 写 <b>从站侧</b>(≠ 主站 rx)</span>
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<span class="pill">魔数 <b>@35=0xA5</b></span>
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<span class="pill">电机槽 <b>≤9 × 56 B</b></span>
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<span class="pill">稀疏写 <b>CONFIG=1</b></span>
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@@ -437,20 +437,20 @@ for (i = 0; i < count; i++) {
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<div class="sec-head">
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<span class="sec-no">4</span>
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<h2>每拍成本与 SM 预算</h2>
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<span class="tagline">PRAM ≈0.441 µs/B · 稀疏写 1.6.22+</span>
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<span class="tagline">从站写 ESC 成本 · 稀疏写 1.6.22+(不是主站 rx)</span>
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</div>
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<div class="cost-grid">
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<div class="cost-card c-cyan">
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<div class="lbl">输入写侧 · 3 电机稀疏</div>
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<div class="val">116</div>
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<div class="unit">µs/拍 · 264 B×0.441 · 11.6% @1ms</div>
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<div class="val">—</div>
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<div class="unit">从站写 ESC · 按实占字节估(≠ 主站 rx)</div>
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<div class="bar"><i style="width:11.6%"></i></div>
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</div>
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<div class="cost-card c-blue">
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<div class="lbl">输入写侧 · 整包基线</div>
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<div class="val">265</div>
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<div class="unit">µs/拍 · 600×0.441 · 26.5% @1ms</div>
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<div class="val">—</div>
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<div class="unit">从站写 ESC · 600B 整包(≠ 主站 rx)</div>
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<div class="bar"><i style="width:26.5%"></i></div>
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</div>
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<div class="cost-card c-amber">
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@@ -524,7 +524,7 @@ count=9 → 整包 600 B(两段相接,回退)</code></pre>
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布局真源 <code>comm/ethercat_can_bridge.h</code>(1.6.21)· 尺寸 <code>comm/ethercat_pdo_size.h</code> ·
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固件版本 <code>config.h APP_FW_VERSION = 1.6.24</code> ·
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稀疏写 <code>ethercat_pdo.cpp sparseEscWritePlan</code> + <code>ecatappl.c PDO_InputMapping</code> ·
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成本系数 <code>0.441 µs/B</code> · 布局魔数 <code>kEcatMotLayoutMagic = 0xA5</code>
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成本说明:从站写 ESC 与主站 rx 是两段时间 · 布局魔数 <code>kEcatMotLayoutMagic = 0xA5</code>
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</footer>
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</div>
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