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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/can/can_test.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">测试指南</h1><div class="date inPage">2 Dec 2024</div><div style="color: gray;">
Read time: 2 minute(s)
</div><div class="- topic/body concept/conbody body conbody"><div class="- topic/p p" data-ofbid="d97716e22__20250121171535">测试环境<ul class="- topic/ul ul" id="can_test_guide__ul_u13_fcn_d1c" data-ofbid="can_test_guide__ul_u13_fcn_d1c"><li class="- topic/li li" data-ofbid="d97716e25__20250121171535">硬件<ul class="- topic/ul ul" id="can_test_guide__ul_qz1_dcn_d1c" data-ofbid="can_test_guide__ul_qz1_dcn_d1c"><li class="- topic/li li" data-ofbid="d97716e28__20250121171535">
<p class="- topic/p p" data-ofbid="d97716e30__20250121171535">测试板:带有两个 CAN 接口的测试板</p>
</li><li class="- topic/li li" data-ofbid="d97716e33__20250121171535">
<p class="- topic/p p" data-ofbid="d97716e35__20250121171535">PC用于和测试板交互</p>
</li><li class="- topic/li li" data-ofbid="d97716e38__20250121171535">
<p class="- topic/p p" data-ofbid="d97716e40__20250121171535">串口线:连接测试板的调试串口</p>
</li></ul></li><li class="- topic/li li" data-ofbid="d97716e43__20250121171535">软件<ul class="- topic/ul ul" id="can_test_guide__ul_rz1_dcn_d1c" data-ofbid="can_test_guide__ul_rz1_dcn_d1c"><li class="- topic/li li" data-ofbid="d97716e46__20250121171535">
<p class="- topic/p p" data-ofbid="d97716e48__20250121171535">PC 端串口终端软件</p>
</li><li class="- topic/li li" data-ofbid="d97716e51__20250121171535">
<p class="- topic/p p" data-ofbid="d97716e53__20250121171535">can-utils 第三方软件包</p>
</li><li class="- topic/li li" data-ofbid="d97716e56__20250121171535">
<p class="- topic/p p" data-ofbid="d97716e58__20250121171535">iprouter2 第三方软件包</p>
</li></ul></li></ul></div><section class="- topic/section section" id="can_test_guide__section_sz1_dcn_d1c" data-ofbid="can_test_guide__section_sz1_dcn_d1c"><h2 class="- topic/title title sectiontitle">第三方软件包编译</h2>
<div class="- topic/p p" data-ofbid="d97716e66__20250121171535">SDK 中已默认编译 <span class="+ topic/ph sw-d/filepath ph filepath">can-utils/iprouter2</span> 软件包,可以直接使用。也可以通过以下两种方式编译测试:<ul class="- topic/ul ul" id="can_test_guide__ul_qgr_hcn_d1c" data-ofbid="can_test_guide__ul_qgr_hcn_d1c"><li class="- topic/li li" data-ofbid="d97716e72__20250121171535">使用预编译包<p class="- topic/p p" data-ofbid="d97716e74__20250121171535">SDK 中提供了 can-utils/iprouter2 的预编译包,可以直接将预编译包的目标文件编译到镜像。这种方式不需要编译
can-utils/iprouter2
源码,节省编译时间。</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="can_test_guide__codeblock_uz1_dcn_d1c" data-ofbid="can_test_guide__codeblock_uz1_dcn_d1c">Third-party packages---&gt;
[*] can-utils---&gt;
[*] use prebuilt binary instead of building from <strong class="+ topic/ph hi-d/b ph b">source</strong></pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="can_test_guide__codeblock_vz1_dcn_d1c" data-ofbid="can_test_guide__codeblock_vz1_dcn_d1c">Third-party packages---&gt;
[*] iproute2---&gt;
[*] use prebuilt binary instead of building from <strong class="+ topic/ph hi-d/b ph b">source</strong></pre></li><li class="- topic/li li" data-ofbid="d97716e84__20250121171535">编译源码包<p class="- topic/p p" data-ofbid="d97716e86__20250121171535">这种方式直接编译源码,而不使用 SDK
中的预编译包。</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="can_test_guide__codeblock_xz1_dcn_d1c" data-ofbid="can_test_guide__codeblock_xz1_dcn_d1c">Third-party packages---&gt;
[*] can-utils---&gt;
[ ] use prebuilt binary instead of building from <strong class="+ topic/ph hi-d/b ph b">source</strong></pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="can_test_guide__codeblock_yz1_dcn_d1c" data-ofbid="can_test_guide__codeblock_yz1_dcn_d1c">Third-party packages---&gt;
[*] iproute2---&gt;
[ ] use prebuilt binary instead of building from <strong class="+ topic/ph hi-d/b ph b">source</strong></pre></li></ul></div>
</section><section class="- topic/section section" id="can_test_guide__section_zz1_dcn_d1c" data-ofbid="can_test_guide__section_zz1_dcn_d1c"><h2 class="- topic/title title sectiontitle">CAN
收发测试</h2>
<div class="- topic/p p" data-ofbid="d97716e102__20250121171535">
<ol class="- topic/ol ol" id="can_test_guide__ol_evp_gqj_g1c" data-ofbid="can_test_guide__ol_evp_gqj_g1c"><li class="- topic/li li" data-ofbid="d97716e105__20250121171535">将测试板上的两个 CAN 接口对接。使用 ip 命令设置两个开发板的 CAN 接口,设置 CAN 接口的速度为 500Kb/s。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="can_test_guide__codeblock_a1b_dcn_d1c" data-ofbid="can_test_guide__codeblock_a1b_dcn_d1c">ip link set can0 type can bitrate <span class="hl-number">500000</span> <em class="hl-comment">//设置 CAN0</em>
ip link set can1 type can bitrate <span class="hl-number">500000</span> <em class="hl-comment">//设置 CAN1</em></pre></li><li class="- topic/li li" data-ofbid="d97716e109__20250121171535">打开 CAN 网卡<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="can_test_guide__codeblock_b1b_dcn_d1c" data-ofbid="can_test_guide__codeblock_b1b_dcn_d1c">ifconfig can0 up <em class="hl-comment">//打开 CAN0</em>
ifconfig can1 up <em class="hl-comment">//打开 CAN1</em></pre></li><li class="- topic/li li" data-ofbid="d97716e113__20250121171535">设置 CAN1 接收数据<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="can_test_guide__codeblock_c1b_dcn_d1c" data-ofbid="can_test_guide__codeblock_c1b_dcn_d1c">candump can0 &amp;</pre><p class="- topic/p p" data-ofbid="d97716e117__20250121171535">CAN0 发送数据</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="can_test_guide__codeblock_d1b_dcn_d1c" data-ofbid="can_test_guide__codeblock_d1b_dcn_d1c">cansend can0 <span class="hl-number">5</span>A1#<span class="hl-number">11.22</span>.<span class="hl-number">33.44</span>.<span class="hl-number">55.66</span>.<span class="hl-number">77.88</span></pre><div class="- topic/p p" data-ofbid="d97716e121__20250121171535">上述 cansend 命令中“5A1”是帧 ID“#”后面的“11.22.33.44.55.66.77.88”是要发送的数据十六进制。CAN2.0 一次最多发送 8 个字节的数据8 字节数据之间用“.”隔开can-utils 会对数据进行解析。<div class="- topic/note note note note_note" id="can_test_guide__note_e4y_4cn_d1c" data-ofbid="can_test_guide__note_e4y_4cn_d1c"><span class="note__title">注:</span> 当 CAN 总线上只有一个结点时,此时 CAN 结点发送数据,无法获取到 ACK此时结点检测到错误并将会一直重发数据该结点会进入被动错误状态但不会进入总线关闭状态直到有其它结点接入总线。这是符合 CAN 总线协议的。</div></div></li></ol>
</div>
</section><section class="- topic/section section" id="can_test_guide__section_e1b_dcn_d1c" data-ofbid="can_test_guide__section_e1b_dcn_d1c"><h2 class="- topic/title title sectiontitle">CAN 组网测试</h2>
<p class="- topic/p p" data-ofbid="d97716e132__20250121171535">多个 CAN 结点可进行组网测试,组网测试时应遵循以下原则:</p>
<ol class="- topic/ol ol" id="can_test_guide__ol_f1b_dcn_d1c" data-ofbid="can_test_guide__ol_f1b_dcn_d1c"><li class="- topic/li li" data-ofbid="d97716e136__20250121171535">不同 CAN 结点发送不同的帧 ID当多个结点同时发送时总线根据帧 ID 进行仲裁,优先级最高的获得总线权,可以向总线发送数据。若结点发送的帧 ID 相同,则同时发送数据时将无法仲裁。</li><li class="- topic/li li" data-ofbid="d97716e138__20250121171535">组网测试时应确保总线两端匹配有 120 欧姆(典型值)的终端电阻。</li></ol>
<div class="- topic/note note note note_note" id="can_test_guide__note_w3j_dcn_d1c" data-ofbid="can_test_guide__note_w3j_dcn_d1c"><span class="note__title">注:</span> 由于每个 demo 板都有匹配的终端电阻,多个 CAN 接入总线时,多个 demo 板的终端电阻并联接入网络,会严重影响 CAN 总线通信。应拆除掉多余的终端电阻,确保整个 CAN 网络的终端电阻为 120 欧姆。</div>
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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="#can_test_guide__section_sz1_dcn_d1c" data-tocid="can_test_guide__section_sz1_dcn_d1c">第三方软件包编译</a></div></li><li class="section-item"><div class="section-title"><a href="#can_test_guide__section_zz1_dcn_d1c" data-tocid="can_test_guide__section_zz1_dcn_d1c">CAN
收发测试</a></div></li><li class="section-item"><div class="section-title"><a href="#can_test_guide__section_e1b_dcn_d1c" data-tocid="can_test_guide__section_e1b_dcn_d1c">CAN 组网测试</a></div></li></ul></div>
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