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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/i2c/i2c_config_lite.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">参数配置</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 2 minute(s)
|
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</div><div class="- topic/body body"><p class="- topic/p p" data-ofbid="d158977e19__20250121171616">以 D211DC-DEMO-V1.0 开发板为例，I2C 接口 3 用于与触摸屏设备通信，原理图如下： </p><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_dkc_fd3_fdc" src="../../../images/i2c/ctp_interface.png" width="384" alt="CTP_interface2"/></div><br/><div class="- topic/p p" data-ofbid="d158977e24__20250121171616">另外根据芯片手册 > <cite class="- topic/cite cite">4 引脚复用</cite> 章节可知：<ul class="- topic/ul ul simple" id="id__ul_fkc_fd3_fdc" data-ofbid="id__ul_fkc_fd3_fdc"><li class="- topic/li li" data-ofbid="d158977e30__20250121171616">
|
||
<p class="- topic/p p" data-ofbid="d158977e32__20250121171616">通信接口为 I2C3，Master 模式</p>
|
||
</li><li class="- topic/li li" data-ofbid="d158977e35__20250121171616">
|
||
<p class="- topic/p p" data-ofbid="d158977e37__20250121171616">PA8 为 RST</p>
|
||
</li><li class="- topic/li li" data-ofbid="d158977e40__20250121171616">
|
||
<p class="- topic/p p" data-ofbid="d158977e42__20250121171616">PA9 为 INT</p>
|
||
</li><li class="- topic/li li" data-ofbid="d158977e45__20250121171616">
|
||
<p class="- topic/p p" data-ofbid="d158977e47__20250121171616">PA10 为 I2C3_SCL</p>
|
||
</li><li class="- topic/li li" data-ofbid="d158977e50__20250121171616">
|
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<p class="- topic/p p" data-ofbid="d158977e52__20250121171616">PA11 为 I2C3_SDA</p>
|
||
</li></ul></div><div class="- topic/p p" data-ofbid="d158977e55__20250121171616">需配置：<ul class="- topic/ul ul simple" id="id__ul_gkc_fd3_fdc" data-ofbid="id__ul_gkc_fd3_fdc"><li class="- topic/li li" data-ofbid="d158977e58__20250121171616">
|
||
<p class="- topic/p p" data-ofbid="d158977e60__20250121171616">驱动配置</p>
|
||
</li><li class="- topic/li li" data-ofbid="d158977e63__20250121171616">
|
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<p class="- topic/p p" data-ofbid="d158977e65__20250121171616">pinmux 配置</p>
|
||
</li></ul></div><section class="- topic/section section" id="id__section_msv_4d3_fdc" data-ofbid="id__section_msv_4d3_fdc"><h2 class="- topic/title title sectiontitle">驱动配置</h2>
|
||
|
||
<ol class="- topic/ol ol" id="id__ol_zs1_yhz_gdc" data-ofbid="id__ol_zs1_yhz_gdc"><li class="- topic/li li" data-ofbid="d158977e74__20250121171616">
|
||
<div class="- topic/div div section" id="id__master">
|
||
<strong class="+ topic/ph hi-d/b ph b">master 驱动使能</strong>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_hkc_fd3_fdc" data-ofbid="id__codeblock_hkc_fd3_fdc">Board options --->
|
||
[ ] Using i2c0
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||
[ ] Using i2c1
|
||
[ ] Using i2c2
|
||
[*] Using i2c3
|
||
i2c3 parameter --->
|
||
[ ] Using I2C3 <span class="hl-number">10</span>-bit Addr(<strong class="hl-keyword">default</strong> <span class="hl-number">7</span>-bit addr)
|
||
[ ] Using I2C3 Stand Speed(<strong class="hl-keyword">default</strong> fast speed)
|
||
[ ] Using I2C3 Slave Mode(<strong class="hl-keyword">default</strong> master mode)
|
||
</pre></div>
|
||
</li><li class="- topic/li li" data-ofbid="d158977e84__20250121171616">
|
||
<div class="- topic/div div section" id="id__slave">
|
||
<strong class="+ topic/ph hi-d/b ph b">slave 驱动使能</strong>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_ikc_fd3_fdc" data-ofbid="id__codeblock_ikc_fd3_fdc">Board options --->
|
||
[ ] Using i2c0
|
||
[ ] Using i2c1
|
||
[ ] Using i2c2
|
||
[*] Using i2c3
|
||
i2c3 parameter --->
|
||
[ ] Using I2C3 <span class="hl-number">10</span>-bit Addr(<strong class="hl-keyword">default</strong> <span class="hl-number">7</span>-bit addr)
|
||
[ ] Using I2C3 Stand Speed(<strong class="hl-keyword">default</strong> fast speed)
|
||
[*] Using I2C3 Slave Mode(<strong class="hl-keyword">default</strong> master mode)
|
||
(<span class="hl-number">80</span>) I2C3 Slave Addr
|
||
</pre><div class="- topic/note note note note_note" id="id__note_ill_qn3_ddc" data-ofbid="id__note_ill_qn3_ddc"><span class="note__title">注：</span>
|
||
<p class="- topic/p p" data-ofbid="d158977e95__20250121171616">从机模式输入的 80 是 10 进制的，换算成 16 进制就是 0x50</p>
|
||
</div></div>
|
||
</li><li class="- topic/li li" data-ofbid="d158977e99__20250121171616">
|
||
<div class="- topic/div div section" id="id__id2">
|
||
<strong class="+ topic/ph hi-d/b ph b">master 中断模式使能</strong>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_jkc_fd3_fdc" data-ofbid="id__codeblock_jkc_fd3_fdc">Drivers options --->
|
||
[*] Support I2c Dev Interrupt Mode
|
||
</pre><div class="- topic/note note note note_note" id="id__note_jll_qn3_ddc" data-ofbid="id__note_jll_qn3_ddc"><span class="note__title">注：</span>
|
||
<p class="- topic/p p" data-ofbid="d158977e110__20250121171616">如果这里不进行配置，默认是使用轮询模式进行数据传输</p>
|
||
</div></div>
|
||
</li></ol>
|
||
</section><section class="- topic/section section" id="id__section_y1h_md3_fdc" data-ofbid="id__section_y1h_md3_fdc"><h2 class="- topic/title title sectiontitle">Pinmux 配置</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d158977e120__20250121171616">pinmux.c 的完整路径是 <span class="+ topic/ph sw-d/filepath ph filepath">target/$(CPU)/$(BOARD)/pinmux.c</span>， 例如 D211DC-DEMO-V1-0
|
||
开发板， demo100-nand 配置的 <span class="+ topic/ph sw-d/filepath ph filepath">pinmux.c</span>即为
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">target/d21x/demo100-nand/pinmux.c</span></p>
|
||
<div class="- topic/p p" data-ofbid="d158977e131__20250121171616">根据原理图，添加如下引脚配置<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_kkc_fd3_fdc" data-ofbid="id__codeblock_kkc_fd3_fdc"><strong class="hl-keyword">struct</strong> aic_pinmux aic_pinmux_config[] = {
|
||
...
|
||
#ifdef AIC_USING_I2C3
|
||
{<span class="hl-number">1</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PA.8"</span>}, <em class="hl-comment">// RST</em>
|
||
{<span class="hl-number">1</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PA.9"</span>}, <em class="hl-comment">// INT</em>
|
||
{<span class="hl-number">4</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PA.10"</span>}, <em class="hl-comment">// SCK</em>
|
||
{<span class="hl-number">4</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PA.11"</span>}, <em class="hl-comment">// SDA</em>
|
||
#endif
|
||
...
|
||
}</pre></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="#id__section_msv_4d3_fdc" data-tocid="id__section_msv_4d3_fdc">驱动配置</a></div></li><li class="section-item"><div class="section-title"><a href="#id__section_y1h_md3_fdc" data-tocid="id__section_y1h_md3_fdc">Pinmux 配置</a></div></li></ul></div>
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