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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" role="article" aria-labelledby="ariaid-title1">
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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://aicdocco/taskstopics/sdk/cmu/cmu_configure_lite.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">CMU 配置</h1>
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<div class="date inPage">16 May 2025</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div>
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<div class="- topic/body body">
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2025-07-22 11:15:46 +08:00
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<p class="- topic/p p" data-ofbid="d111567e31__20250519091516">CMU 是每个系统的必需模块，因此 CMU 驱动默认会被编译进系统，不需要在 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">scons --menuconfig</span> 菜单中进行使能。</p>
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<div class="- topic/p p" data-ofbid="d111567e37__20250519091516">在 <span class="- topic/ph ph">Luban-Lite</span> 中，需在板级初始化和模块驱动初始化时配置系统时钟。CMU 模块配置包括以下几个方面：<ul class="- topic/ul ul" id="id__ul_zs4_vfv_hdc" data-ofbid="id__ul_zs4_vfv_hdc">
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<li class="- topic/li li" data-ofbid="d111567e44__20250519091516"><a class="- topic/xref xref" href="cmu_configure_lite.html#id__clock">系统 Clock 配置</a></li>
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<li class="- topic/li li" data-ofbid="d111567e49__20250519091516"><a class="- topic/xref xref" href="cmu_configure_lite.html#id__id2">模块 Clock 配置</a></li>
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<li class="- topic/li li" data-ofbid="d111567e54__20250519091516"><a class="- topic/xref xref" href="cmu_configure_lite.html#id__reset">模块 Reset 配置</a></li>
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</ul></div>
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<section class="- topic/section section" id="id__clock" data-ofbid="id__clock"><h2 class="- topic/title title sectiontitle">系统 Clock 配置</h2>
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<p class="- topic/p p" data-ofbid="d111567e65__20250519091516">在板级初始化阶段，时钟配置主要涉及系统时钟和部分模块时钟，可选择以下任意一种方式进行配置：</p>
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<ul class="- topic/ul ul simple" id="id__ul_or3_whd_bdc" data-ofbid="id__ul_or3_whd_bdc">
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<li class="- topic/li li" data-ofbid="d111567e70__20250519091516">
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<p class="- topic/p p" data-ofbid="d111567e72__20250519091516">通过 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">scons --menuconfig</span> 菜单进行配置。</p>
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</li>
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<li class="- topic/li li" data-ofbid="d111567e79__20250519091516">
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<div class="- topic/p p" data-ofbid="d111567e81__20250519091516">通过修改源文件中的参数，源文件路径为
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2025-01-23 16:37:00 +08:00
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<span class="+ topic/ph sw-d/filepath ph filepath">luban-lite\target\$chip\$board\sys_clk.c</span>。代码示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_u3j_y5j_bdc" data-ofbid="id__codeblock_u3j_y5j_bdc"><strong class="hl-keyword">struct</strong> aic_sysclk aic_sysclk_config[] = {
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{<span class="hl-number">1200000000</span>, CLK_PLL_INT1},
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{<span class="hl-number">491520000</span>, CLK_PLL_FRA1},
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{<span class="hl-number">840000000</span>, CLK_PLL_FRA2},
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{<span class="hl-number">240000000</span>, CLK_AXI0},
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{<span class="hl-number">240000000</span>, CLK_AHB0},
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{<span class="hl-number">100000000</span>, CLK_APB0},
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{<span class="hl-number">24000000</span>, CLK_APB1},
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{<span class="hl-number">600000000</span>, CLK_CPU},
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{<span class="hl-number">25000000</span>, CLK_OUT2},
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#ifdef AIC_USING_UART0
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{<span class="hl-number">48000000</span>, CLK_UART0},
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#endif
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}
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<strong class="hl-keyword">void</strong> aic_board_sysclk_init(<strong class="hl-keyword">void</strong>)
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{
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uint32_t i = <span class="hl-number">0</span>;
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<em class="hl-comment">// 设置时钟频率</em>
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<strong class="hl-keyword">for</strong> (i=<span class="hl-number">0</span>; i<<strong class="hl-keyword">sizeof</strong>(aic_sysclk_config)/<strong class="hl-keyword">sizeof</strong>(<strong class="hl-keyword">struct</strong> aic_sysclk); i++) {
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hal_clk_set_freq(aic_sysclk_config[i].clk_id, aic_sysclk_config[i].freq);
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}
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}</pre></div>
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2025-04-23 17:54:31 +08:00
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</li>
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</ul>
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</section>
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<section class="- topic/section section" id="id__id2" data-ofbid="id__id2"><h2 class="- topic/title title sectiontitle">模块 Clock 配置</h2>
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2025-07-22 11:15:46 +08:00
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<div class="- topic/p p" data-ofbid="d111567e97__20250519091516">部分模块的时钟配置是在模块驱动初始化过程中进行的。例如，在 PWM
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2025-01-23 16:37:00 +08:00
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模块的初始化阶段，时钟配置代码如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_b11_z5j_bdc" data-ofbid="id__codeblock_b11_z5j_bdc"><strong class="hl-keyword">int</strong> hal_pwm_init(<strong class="hl-keyword">void</strong>)
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{
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<em class="hl-comment">// 设置时钟频率</em>
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hal_clk_set_freq(CLK_PWM, PWM_CLK_RATE);
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<em class="hl-comment">// 使能时钟</em>
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hal_clk_enable(CLK_PWM);
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}</pre></div>
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2025-04-23 17:54:31 +08:00
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</section>
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<section class="- topic/section section" id="id__reset" data-ofbid="id__reset"><h2 class="- topic/title title sectiontitle">模块 Reset 配置</h2>
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2025-01-23 16:37:00 +08:00
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2025-07-22 11:15:46 +08:00
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<p class="- topic/p p" data-ofbid="d111567e108__20250519091516">模块放开复位一般在驱动初始化中操作，复位配置有两种方式：</p>
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2025-04-23 17:54:31 +08:00
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<ul class="- topic/ul ul arabic simple" id="id__ol_tr3_whd_bdc" data-ofbid="id__ol_tr3_whd_bdc">
|
2025-07-22 11:15:46 +08:00
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<li class="- topic/li li" data-ofbid="d111567e113__20250519091516">
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<div class="- topic/p p" data-ofbid="d111567e115__20250519091516">和时钟一起操作，使能时钟的同时放开复位。例如：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_nym_z5j_bdc" data-ofbid="id__codeblock_nym_z5j_bdc"><em class="hl-comment">// 使能时钟 & 放开复位</em>
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2025-01-23 16:37:00 +08:00
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hal_clk_enable_deassertrst(CLK_PWM);</pre></div>
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2025-04-23 17:54:31 +08:00
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</li>
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2025-07-22 11:15:46 +08:00
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<li class="- topic/li li" data-ofbid="d111567e121__20250519091516">
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<div class="- topic/p p" data-ofbid="d111567e123__20250519091516">单独操作，独立的放开复位。例如：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_imp_z5j_bdc" data-ofbid="id__codeblock_imp_z5j_bdc"><em class="hl-comment">// 放开复位</em>
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2025-01-23 16:37:00 +08:00
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hal_reset_deassert(RESET_PWM);</pre></div>
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2025-04-23 17:54:31 +08:00
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</li>
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</article></main></div>
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2025-01-23 16:37:00 +08:00
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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="#id__clock" data-tocid="id__clock">系统 Clock 配置</a></div></li><li class="section-item"><div class="section-title"><a href="#id__id2" data-tocid="id__id2">模块 Clock 配置</a></div></li><li class="section-item"><div class="section-title"><a href="#id__reset" data-tocid="id__reset">模块 Reset 配置</a></div></li></ul></div>
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