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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" 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/xpwm/xpwm_test.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">测试指南</h1><div class="date inPage">4 Dec 2024</div><div style="color: gray;">
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Read time: 7 minute(s)
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</div><div class="- topic/body body"><section class="- topic/section section" id="id__id2" data-ofbid="id__id2"><h2 class="- topic/title title sectiontitle">测试环境</h2>
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<ul class="- topic/ul ul" id="id__ul_mdt_jj3_fdc" data-ofbid="id__ul_mdt_jj3_fdc"><li class="- topic/li li" data-ofbid="d155459e23__20250121171615"><strong class="+ topic/ph hi-d/b ph b">硬件</strong><ul class="- topic/ul ul simple" id="id__ul_kvn_pyh_ddc" data-ofbid="id__ul_kvn_pyh_ddc"><li class="- topic/li li" data-ofbid="d155459e27__20250121171615">
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<p class="- topic/p p" data-ofbid="d155459e29__20250121171615">FPGA 验证版</p>
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</li><li class="- topic/li li" data-ofbid="d155459e32__20250121171615">
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<p class="- topic/p p" data-ofbid="d155459e34__20250121171615">示波器，用于观察输出 XPWM/PWM 信号的波形</p>
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</li></ul></li><li class="- topic/li li" data-ofbid="d155459e37__20250121171615"><strong class="+ topic/ph hi-d/b ph b">软件</strong><ul class="- topic/ul ul simple" id="id__ul_lvn_pyh_ddc" data-ofbid="id__ul_lvn_pyh_ddc"><li class="- topic/li li" data-ofbid="d155459e41__20250121171615">
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||
<p class="- topic/p p" data-ofbid="d155459e43__20250121171615">PC 端的串口终端软件，用于 PC 和开发板进行串口通信</p>
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||
</li><li class="- topic/li li" data-ofbid="d155459e46__20250121171615">
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<p class="- topic/p p" data-ofbid="d155459e48__20250121171615">RT-Thread 系统自带的 <code class="+ topic/ph pr-d/codeph ph codeph">pwm</code> 命令行工具</p>
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</li></ul></li><li class="- topic/li li" data-ofbid="d155459e54__20250121171615"><strong class="+ topic/ph hi-d/b ph b">软件配置</strong><p class="- topic/p p" data-ofbid="d155459e57__20250121171615">当打开 RT-Thread 系统的 PWM 设备驱动框架，就会在启动时注册生成 <code class="+ topic/ph pr-d/codeph ph codeph">pwm</code>
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命令。</p></li></ul></section><section class="- topic/section section" id="id__xpwm-pwm" data-ofbid="id__xpwm-pwm"><h2 class="- topic/title title sectiontitle">测试 XPWM/PWM</h2>
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<p class="- topic/p p" data-ofbid="d155459e67__20250121171615"><span class="+ topic/keyword sw-d/cmdname keyword cmdname">pwm</span> 命令帮助信息如下：</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_mvn_pyh_ddc" data-ofbid="id__codeblock_mvn_pyh_ddc">spss /> pwm
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Usage:
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pwm probe <device name> - probe pwm by name
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pwm enable <channel> - enable pwm channel
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pwm disable <channel> - disable pwm channel
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pwm get <channel> - get pwm channel info
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pwm set <channel> <period> <pulse> <pulse cnt> - set pwm channel info
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pwm set_fifo_num <channel> <fifo_num> - set xpwm fifo count
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pwm set_fifo <channel> <fifo_index> <period> <pulse> <pulse cnt> - set xpwm fifo info
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pwm get_fifo <channel> - get xpwm fifo info
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pwm dma_test <channel> <loop_times> - xpwm dma test</pre>
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<p class="- topic/p p" data-ofbid="d155459e75__20250121171615">测试前应先注册设备：</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_nvn_pyh_ddc" data-ofbid="id__codeblock_nvn_pyh_ddc">aic> pwm probe xpwm
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probe xpwm success
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</pre>
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<p class="- topic/p p" data-ofbid="d155459e82__20250121171615">
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<strong class="+ topic/ph hi-d/b ph b">- 使用举例 1： XPWM 自由方式演示。</strong>
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</p>
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<ol class="- topic/ol ol arabic simple" id="id__ol_ovn_pyh_ddc" data-ofbid="id__ol_ovn_pyh_ddc"><li class="- topic/li li" data-ofbid="d155459e89__20250121171615">
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<div class="- topic/p p" data-ofbid="d155459e91__20250121171615">在 <span class="- topic/ph ph">Luban-Lite</span> 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">scons --menuconfig</span>，进入 menuconfig
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的功能配置界面，将 XPWM
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配置为普通模式：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_pvn_pyh_ddc" data-ofbid="id__codeblock_pvn_pyh_ddc">Board options --->
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Select ALL XPWM MODE (normal mode) --->
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</pre></div>
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</li><li class="- topic/li li" data-ofbid="d155459e102__20250121171615">
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<div class="- topic/p p" data-ofbid="d155459e104__20250121171615">配置输出频率为 1KHz，占空比为 80% 的 7
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个脉冲。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_rvn_pyh_ddc" data-ofbid="id__codeblock_rvn_pyh_ddc">aic> pwm set010000008000007
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pwm info set on xpwm at channel <span class="hl-number">0</span></pre></div>
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</li><li class="- topic/li li" data-ofbid="d155459e109__20250121171615">
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<p class="- topic/p p" data-ofbid="d155459e111__20250121171615">观察示波器，可以见到输出了 7 个脉冲。</p>
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</li></ol>
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<p class="- topic/p p" data-ofbid="d155459e115__20250121171615">
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<strong class="+ topic/ph hi-d/b ph b">- 使用举例 2： XPWM 持续输出功能演示。</strong>
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</p>
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<ol class="- topic/ol ol arabic simple" id="id__ol_tvn_pyh_ddc" data-ofbid="id__ol_tvn_pyh_ddc"><li class="- topic/li li" data-ofbid="d155459e122__20250121171615">
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<div class="- topic/p p" data-ofbid="d155459e124__20250121171615">在 <span class="- topic/ph ph">Luban-Lite</span> 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">scons --menuconfig</span>，进入 menuconfig
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的功能配置界面，将 XPWM
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配置为连续模式：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_uvn_pyh_ddc" data-ofbid="id__codeblock_uvn_pyh_ddc">Board options --->
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Select ALL XPWM MODE (continuous mode) --->
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</pre></div>
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</li><li class="- topic/li li" data-ofbid="d155459e135__20250121171615">
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<div class="- topic/p p" data-ofbid="d155459e137__20250121171615">配置输出中断频率为 1KHz，占空比为
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30%，任意个数脉冲。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_wvn_pyh_ddc" data-ofbid="id__codeblock_wvn_pyh_ddc">aic> pwm set010000003000007
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pwm info set on xpwm at channel <span class="hl-number">0</span></pre></div>
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</li><li class="- topic/li li" data-ofbid="d155459e142__20250121171615">
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<p class="- topic/p p" data-ofbid="d155459e144__20250121171615">观察示波器，可以见到连续输出的 PWM。</p>
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||
</li></ol>
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<p class="- topic/p p" data-ofbid="d155459e148__20250121171615">
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<strong class="+ topic/ph hi-d/b ph b">- 使用举例 3： XPWM 中断配置 FIFO 方式演示。</strong>
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</p>
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||
<ol class="- topic/ol ol arabic simple" id="id__ol_yvn_pyh_ddc" data-ofbid="id__ol_yvn_pyh_ddc"><li class="- topic/li li" data-ofbid="d155459e155__20250121171615">
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||
<div class="- topic/p p" data-ofbid="d155459e157__20250121171615">在 <span class="- topic/ph ph">Luban-Lite</span> 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">scons --menuconfig</span>，进入 menuconfig
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的功能配置界面，将 XPWM 配置为使用 FIFO 模式，同时关闭 DMA
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支持：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_zvn_pyh_ddc" data-ofbid="id__codeblock_zvn_pyh_ddc">Board options --->
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Select ALL XPWM MODE (fifo mode) --->
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......
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[ ] Using DMA
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||
</pre></div>
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||
</li><li class="- topic/li li" data-ofbid="d155459e168__20250121171615">
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||
<div class="- topic/p p" data-ofbid="d155459e170__20250121171615">XPWM 最大支持 8 组 FIFO，其中每组深度为 3*32bits。 此处演示 XPWM 通道 0 设置 5 组 FIFO，通道 1 设置 1 组
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FIFO，通道 2 设置 1 组 FIFO，通道 3 设置 2 组
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FIFO。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_bwn_pyh_ddc" data-ofbid="id__codeblock_bwn_pyh_ddc">aic> pwm set_fifo <span class="hl-number">0010000001000001</span>
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pwm set fifo on xpwm at channel <span class="hl-number">0</span>
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aic> pwm set_fifo <span class="hl-number">015000002000002</span>
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pwm set fifo on xpwm at channel <span class="hl-number">0</span>
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aic> pwm set_fifo <span class="hl-number">025000003000003</span>
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||
pwm set fifo on xpwm at channel <span class="hl-number">0</span>
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||
aic> pwm set_fifo <span class="hl-number">032000001000001</span>
|
||
pwm set fifo on xpwm at channel <span class="hl-number">0</span>
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||
aic> pwm set_fifo <span class="hl-number">043000002000002</span>
|
||
pwm set fifo on xpwm at channel <span class="hl-number">0</span>
|
||
aic> pwm set_fifo_num <span class="hl-number">05</span>
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||
pwm set fifo num on xpwm at channel <span class="hl-number">0</span>
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||
aic> pwm set_fifo <span class="hl-number">1010000005000001</span>
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||
pwm set fifo on xpwm at channel <span class="hl-number">1</span>
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||
aic> pwm set_fifo_num <span class="hl-number">11</span>
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||
pwm set fifo num on xpwm at channel <span class="hl-number">1</span>
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||
aic> pwm set_fifo <span class="hl-number">2010000003000001</span>
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||
pwm set fifo on xpwm at channel <span class="hl-number">2</span>
|
||
aic> pwm set_fifo_num <span class="hl-number">21</span>
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||
pwm set fifo num on xpwm at channel <span class="hl-number">2</span>
|
||
aic> pwm set_fifo <span class="hl-number">3010000001000002</span>
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pwm set fifo on xpwm at channel <span class="hl-number">3</span>
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||
aic> pwm set_fifo <span class="hl-number">3110000002000003</span>
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pwm set fifo on xpwm at channel <span class="hl-number">3</span>
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||
aic> pwm set_fifo_num <span class="hl-number">32</span>
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pwm set fifo num on xpwm at channel <span class="hl-number">3</span></pre></div>
|
||
</li><li class="- topic/li li" data-ofbid="d155459e175__20250121171615">
|
||
<div class="- topic/p p" data-ofbid="d155459e177__20250121171615">使能通道 0/1/2/3。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_dwn_pyh_ddc" data-ofbid="id__codeblock_dwn_pyh_ddc">aic>pwm enable0
|
||
aic>pwm enable1
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||
aic>pwm enable2
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||
aic>pwm enable3</pre></div>
|
||
</li><li class="- topic/li li" data-ofbid="d155459e182__20250121171615">
|
||
<div class="- topic/p p" data-ofbid="d155459e184__20250121171615">可以获取当前 XPWM 通道的 FIFO
|
||
信息。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_fwn_pyh_ddc" data-ofbid="id__codeblock_fwn_pyh_ddc">aic> pwm get_fifo <span class="hl-number">0</span>[<span class="hl-number">179795</span>] I/XPWM: ch0 fifo valid count: <span class="hl-number">5</span>[<span class="hl-number">179800</span>] I/XPWM: fifo_idx <span class="hl-number">0</span>: prd:<span class="hl-number">1000000</span> pulse:<span class="hl-number">100000</span> pulse cnt:<span class="hl-number">1</span>
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||
[<span class="hl-number">179808</span>] I/XPWM: fifo_idx <span class="hl-number">1</span>: prd:<span class="hl-number">500000</span> pulse:<span class="hl-number">200000</span> pulse cnt:<span class="hl-number">2</span>
|
||
[<span class="hl-number">179815</span>] I/XPWM: fifo_idx <span class="hl-number">2</span>: prd:<span class="hl-number">500000</span> pulse:<span class="hl-number">300000</span> pulse cnt:<span class="hl-number">3</span>
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||
[<span class="hl-number">179823</span>] I/XPWM: fifo_idx <span class="hl-number">3</span>: prd:<span class="hl-number">200000</span> pulse:<span class="hl-number">100000</span> pulse cnt:<span class="hl-number">1</span>
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||
[<span class="hl-number">179830</span>] I/XPWM: fifo_idx <span class="hl-number">4</span>: prd:<span class="hl-number">300000</span> pulse:<span class="hl-number">200000</span> pulse cnt:<span class="hl-number">2</span>
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||
</pre></div>
|
||
</li><li class="- topic/li li" data-ofbid="d155459e189__20250121171615">
|
||
<p class="- topic/p p" data-ofbid="d155459e191__20250121171615">观察示波器，可以看到 XPWM 在不断输出 FIFO 中的脉冲组合。</p>
|
||
</li></ol>
|
||
<p class="- topic/p p" data-ofbid="d155459e196__20250121171615">
|
||
<strong class="+ topic/ph hi-d/b ph b">- 使用举例 4： XPWM DMA 配置 FIFO 方式演示。</strong>
|
||
</p>
|
||
<ol class="- topic/ol ol arabic simple" id="id__ol_hwn_pyh_ddc" data-ofbid="id__ol_hwn_pyh_ddc"><li class="- topic/li li" data-ofbid="d155459e203__20250121171615">
|
||
<div class="- topic/p p" data-ofbid="d155459e205__20250121171615">在 <span class="- topic/ph ph">Luban-Lite</span> 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">scons --menuconfig</span>，进入 menuconfig
|
||
的功能配置界面，将 XPWM 配置为使用 FIFO 模式，同时打开 DMA
|
||
支持：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_iwn_pyh_ddc" data-ofbid="id__codeblock_iwn_pyh_ddc">Board options --->
|
||
Select ALL XPWM MODE (fifo mode) --->
|
||
......
|
||
[*] Using DMA
|
||
</pre></div>
|
||
</li><li class="- topic/li li" data-ofbid="d155459e216__20250121171615">
|
||
<div class="- topic/p p" data-ofbid="d155459e218__20250121171615">先使能通道 0/1/2/3。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_kwn_pyh_ddc" data-ofbid="id__codeblock_kwn_pyh_ddc">aic>pwm enable0
|
||
aic>pwm enable1
|
||
aic>pwm enable2
|
||
aic>pwm enable3</pre></div>
|
||
</li><li class="- topic/li li" data-ofbid="d155459e223__20250121171615">
|
||
<div class="- topic/p p" data-ofbid="d155459e225__20250121171615">手动设置 FIFO。 FIFO INDEX 参数将会被忽略，此处只能设置一个 FIFO
|
||
进行测试。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_mwn_pyh_ddc" data-ofbid="id__codeblock_mwn_pyh_ddc">aic > pwm set_fifo <span class="hl-number">0010000003000005</span>
|
||
pwm set fifo on xpwm at channel <span class="hl-number">0</span>
|
||
aic > pwm set_fifo <span class="hl-number">106000005000003</span>
|
||
pwm set fifo on xpwm at channel <span class="hl-number">1</span>
|
||
aic > pwm set_fifo <span class="hl-number">208000005000007</span>
|
||
pwm set fifo on xpwm at channel <span class="hl-number">2</span>
|
||
aic > pwm set_fifo <span class="hl-number">3020003807</span>
|
||
pwm set fifo on xpwm at channel <span class="hl-number">3</span></pre></div>
|
||
</li><li class="- topic/li li" data-ofbid="d155459e230__20250121171615">
|
||
<p class="- topic/p p" data-ofbid="d155459e232__20250121171615">观察示波器。</p>
|
||
</li><li class="- topic/li li" data-ofbid="d155459e235__20250121171615">
|
||
<div class="- topic/p p" data-ofbid="d155459e237__20250121171615">进行 DMA 循环测试，循环输出代码中的组合 N 次，此处演示 3
|
||
次。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_own_pyh_ddc" data-ofbid="id__codeblock_own_pyh_ddc">aic > pwm dma_test <span class="hl-number">03</span>
|
||
xpwm ch0 will loop <span class="hl-number">3</span>times</pre></div>
|
||
<div class="- topic/note note tip note_tip" id="id__note_xnn_qn3_ddc" data-ofbid="id__note_xnn_qn3_ddc"><span class="note__title">提示：</span>
|
||
<ol class="- topic/ol ol arabic simple" type="a" id="id__ol_pwn_pyh_ddc" data-ofbid="id__ol_pwn_pyh_ddc"><li class="- topic/li li" data-ofbid="d155459e245__20250121171615">
|
||
<p class="- topic/p p" data-ofbid="d155459e247__20250121171615"><code class="+ topic/ph pr-d/codeph ph codeph">dma_test</code> 中，会将 BUFF 中的数据循环输出，此处作演示，仅使用了一个 BUFF
|
||
空间，没有区分通道，故每个通道不能同时调用 <code class="+ topic/ph pr-d/codeph ph codeph">dma_test</code> 。</p>
|
||
</li><li class="- topic/li li" data-ofbid="d155459e255__20250121171615">
|
||
<p class="- topic/p p" data-ofbid="d155459e257__20250121171615"><code class="+ topic/ph pr-d/codeph ph codeph">dma_test</code> 中输出的测试组合，在源码 rt_drv_pwm.c 中。</p>
|
||
</li><li class="- topic/li li" data-ofbid="d155459e262__20250121171615">
|
||
<p class="- topic/p p" data-ofbid="d155459e264__20250121171615">由于单组 FIFO 数据大小为 3*32bits,不符合清 CACHE
|
||
数据大小对齐，会出现相关警告为正常现象，不影响使用。</p>
|
||
<p class="- topic/p p" data-ofbid="d155459e267__20250121171615">测试组合如下：</p>
|
||
</li></ol>
|
||
</div>
|
||
</li><li class="- topic/li li" data-ofbid="d155459e272__20250121171615">
|
||
<p class="- topic/p p" data-ofbid="d155459e274__20250121171615">观察示波器。</p>
|
||
</li></ol>
|
||
<p class="- topic/p p" data-ofbid="d155459e278__20250121171615">
|
||
<strong class="+ topic/ph hi-d/b ph b">- 使用举例 5： XPWM 中断配置 FIFO 方式演示。</strong>
|
||
</p>
|
||
<ol class="- topic/ol ol arabic simple" id="id__ol_rwn_pyh_ddc" data-ofbid="id__ol_rwn_pyh_ddc"><li class="- topic/li li" data-ofbid="d155459e285__20250121171615">
|
||
<p class="- topic/p p" data-ofbid="d155459e287__20250121171615">PWM 功能下 <code class="+ topic/ph pr-d/codeph ph codeph">pulse_cnt</code> 参数将被忽略,配置输出频率为 1KHz，占空比为 80%。</p>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_swn_pyh_ddc" data-ofbid="id__codeblock_swn_pyh_ddc">aic> pwm set810000008000000
|
||
pwm info set on xpwm at channel <span class="hl-number">8</span></pre>
|
||
</li><li class="- topic/li li" data-ofbid="d155459e296__20250121171615">
|
||
<p class="- topic/p p" data-ofbid="d155459e298__20250121171615">观察示波器，可以见到相应的 PWM 波。</p>
|
||
<div class="- topic/note note tip note_tip" id="id__note_ynn_qn3_ddc" data-ofbid="id__note_ynn_qn3_ddc"><span class="note__title">提示：</span>
|
||
<p class="- topic/p p" data-ofbid="d155459e303__20250121171615">XPWM 通道为 0-7，PWM 通道为 8-23。</p>
|
||
</div>
|
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</li></ol>
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