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<head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><meta name="description" content="电压读取没变化 现象 当改变输入电压时，电压读取没变化 原因分析 检查是否发生引脚冲突 检查 menuconfig 中，目标 PSADCx 是否打开配置。具体配置方法可见 PSADC 配置 。 电压读取值与实际输入电压差距大现象 现象 当前测试例程中，电压读取值不等于电压读取电压理论值。 电压读取电压理论值 = （adc 值/4095）* adc 基准参考电压 原因分析 检查是否有执行测试例程 ..."/><meta name="DC.rights.owner" content="(C) 版权 2025"/><meta name="copyright" content="(C) 版权 2025"/><meta name="generator" content="DITA-OT"/><meta name="DC.type" content="concept"/><meta name="DC.contributor" content="yan.wang"/><meta name="DC.date.modified" content="2024-11-12"/><meta name="DC.format" content="HTML5"/><meta name="DC.identifier" content="psadc_common_issues"/><meta name="DC.language" content="zh-CN"/><title>常见问题</title><!-- Build number 2023110923. --><meta name="wh-path2root" content="../../../"/><meta name="wh-toc-id" content=""/><meta name="wh-source-relpath" content="topics/sdk/psadc/psadc-common_issues.dita"/><meta name="wh-out-relpath" content="topics/sdk/psadc/psadc-common_issues.html"/>
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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/psadc/psadc-common_issues.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">常见问题</h1><div class="date inPage">12 Nov 2024</div><div style="color: gray;"></div><div class="- topic/body concept/conbody body conbody"><section class="- topic/section section" id="psadc_common_issues__section_lv4_3z4_ybc" data-ofbid="psadc_common_issues__section_lv4_3z4_ybc"><h2 class="- topic/title title sectiontitle">电压读取没变化</h2>
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<p class="- topic/p p" data-ofbid="d70907e27__20250121171522"><strong class="+ topic/ph hi-d/b ph b">现象</strong></p>
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<p class="- topic/p p" data-ofbid="d70907e31__20250121171522">当改变输入电压时，电压读取没变化</p>
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<div class="- topic/p p" data-ofbid="d70907e34__20250121171522"><strong class="+ topic/ph hi-d/b ph b">原因分析</strong><ol class="- topic/ol ol" id="psadc_common_issues__ol_qt5_3z4_ybc" data-ofbid="psadc_common_issues__ol_qt5_3z4_ybc"><li class="- topic/li li" data-ofbid="d70907e38__20250121171522">
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<p class="- topic/p p" data-ofbid="d70907e40__20250121171522">检查是否发生引脚冲突</p>
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</li><li class="- topic/li li" data-ofbid="d70907e43__20250121171522">
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<p class="- topic/p p" data-ofbid="d70907e45__20250121171522">检查 menuconfig 中，目标 PSADCx 是否打开配置。具体配置方法可见 <a xml:lang="zh-CN" lang="zh-CN" class="- topic/xref xref" href="psadc_config.html">PSADC 配置</a>。</p>
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</li></ol></div>
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</section><section class="- topic/section section" id="psadc_common_issues__section_rt5_3z4_ybc" data-ofbid="psadc_common_issues__section_rt5_3z4_ybc"><h2 class="- topic/title title sectiontitle">电压读取值与实际输入电压差距大现象</h2>
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<p class="- topic/p p" data-ofbid="d70907e58__20250121171522"><strong class="+ topic/ph hi-d/b ph b">现象</strong></p>
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<p class="- topic/p p" data-ofbid="d70907e62__20250121171522">当前测试例程中，电压读取值不等于电压读取电压理论值。</p>
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<ul class="- topic/ul ul" id="psadc_common_issues__ul_st5_3z4_ybc" data-ofbid="psadc_common_issues__ul_st5_3z4_ybc"><li class="- topic/li li" data-ofbid="d70907e66__20250121171522">
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<p class="- topic/p p" data-ofbid="d70907e68__20250121171522">电压读取电压理论值 = （adc 值/4095）* adc 基准参考电压</p>
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</li></ul>
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<p class="- topic/p p" data-ofbid="d70907e72__20250121171522"><strong class="+ topic/ph hi-d/b ph b">原因分析</strong></p>
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<div class="- topic/p p" data-ofbid="d70907e77__20250121171522">检查是否有执行测试例程 test_pasdc 配置 adc 基准参考电压<ul class="- topic/ul ul" id="psadc_common_issues__ul_ut5_3z4_ybc" data-ofbid="psadc_common_issues__ul_ut5_3z4_ybc"><li class="- topic/li li" data-ofbid="d70907e80__20250121171522">
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<p class="- topic/p p" data-ofbid="d70907e82__20250121171522">RTOS 环境需执行 test_psadc 时携带参数 <code class="+ topic/ph pr-d/codeph ph codeph">-t <adc 基准参考电压></code></p>
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</li><li class="- topic/li li" data-ofbid="d70907e87__20250121171522">
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<p class="- topic/p p" data-ofbid="d70907e89__20250121171522">裸机环境需先执行一次 <code class="+ topic/ph pr-d/codeph ph codeph">test_psadc modify <adc 基准参考电压></code></p>
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#psadc_common_issues__section_lv4_3z4_ybc" data-tocid="psadc_common_issues__section_lv4_3z4_ybc">电压读取没变化</a></div></li><li class="section-item"><div class="section-title"><a href="#psadc_common_issues__section_rt5_3z4_ybc" data-tocid="psadc_common_issues__section_rt5_3z4_ybc">电压读取值与实际输入电压差距大现象</a></div></li></ul></div>
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