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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/advanced/driver.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">添加驱动</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 3 minute(s)
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</div><div class="- topic/body body"><p class="- topic/p p" data-ofbid="d147895e22__20250121171610">本节以添加 GT911 电容屏驱动为例，介绍外设驱动的添加方法。</p><section class="- topic/section section" id="id__id2" data-ofbid="id__id2"><h2 class="- topic/title title sectiontitle">添加外设</h2>
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<ol class="- topic/ol ol" id="id__ol_j1n_yjq_gdc" data-ofbid="id__ol_j1n_yjq_gdc"><li class="- topic/li li" data-ofbid="d147895e29__20250121171610">
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<div class="- topic/div div section" id="id__id3"><strong class="+ topic/ph hi-d/b ph b">获取源码</strong>
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<p class="- topic/p p" data-ofbid="d147895e35__20250121171610">从 <a class="- topic/xref xref reference external" href="https://github.com/RiceChen/gt911" target="_blank" rel="external noopener">https://github.com/RiceChen/gt911</a> 下载 GT911 的 RT-Thread
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驱动源码位，并将其解压至 <span class="+ topic/ph sw-d/filepath ph filepath">bsp/peripheral/touch</span>
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目录下。</p><div class="- topic/p p" data-ofbid="d147895e44__20250121171610">源码结构如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_axx_xjq_gdc" data-ofbid="id__codeblock_axx_xjq_gdc">touch$ tree
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.
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├── gt911
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│ ├── inc
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│ │ └── gt911.h
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│ ├── Kconfig
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│ └── src
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│ └── gt911.c
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└── SConscript</pre></div></div>
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</li><li class="- topic/li li" data-ofbid="d147895e49__20250121171610">
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<div class="- topic/div div section" id="id__sconscript"><strong class="+ topic/ph hi-d/b ph b">修改</strong>
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<strong class="+ topic/ph hi-d/b ph b">SConscript 文件</strong><div class="- topic/p p" data-ofbid="d147895e57__20250121171610">在<span class="+ topic/ph sw-d/filepath ph filepath">bsp/peripheral/touch/SConscript</span>
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文件中，添加对 GT911
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驱动源码的引用，具体操作内容如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_pwg_4vp_wcc" data-ofbid="id__pre_pwg_4vp_wcc">Import(<span class="hl-string">'AIC_ROOT'</span>)
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Import(<span class="hl-string">'PRJ_KERNEL'</span>)
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from building import *
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cwd = GetCurrentDir()
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src = Glob(<span class="hl-string">'*.c'</span>)
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CPPPATH = []
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<strong class="hl-keyword">if</strong> GetDepend(<span class="hl-string">'AIC_TOUCH_PANEL_GT911'</span>):
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CPPPATH.append(cwd + <span class="hl-string">'/gt911/inc'</span>)
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src += Glob(<span class="hl-string">'gt911/src/*.c'</span>)
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group = DefineGroup(<span class="hl-string">'touch'</span>, src, depend = [<span class="hl-string">''</span>], CPPPATH = CPPPATH)
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Return(<span class="hl-string">'group'</span>)</pre></div><p class="- topic/p p" data-ofbid="d147895e64__20250121171610">如果后续需要添加其他 touch 的驱动，可参考 GT911 模板将其添加到
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SConscript 文件中。</p></div>
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</li><li class="- topic/li li" data-ofbid="d147895e67__20250121171610">
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<div class="- topic/div div section" id="id__pinmux"><strong class="+ topic/ph hi-d/b ph b">修改 <span class="+ topic/ph sw-d/filepath ph filepath">pinmux.c</span>文件</strong>
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<div class="- topic/p p" data-ofbid="d147895e76__20250121171610">根据原理图，在 <span class="+ topic/ph sw-d/filepath ph filepath">target/<cpu>/<board>/pinmux.c</span> 中添加
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RST、INT、SCK 和 SDA
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引脚的定义：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_wp1_bkq_gdc" data-ofbid="id__codeblock_wp1_bkq_gdc"><strong class="hl-keyword">struct</strong> aic_pinmux aic_pinmux_config[] = {
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...
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#ifdef AIC_USING_I2C3
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{<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>
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{<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>
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{<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>
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{<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>
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#endif
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...
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};</pre></div><div class="- topic/note note note note_note" id="id__note_evg_rmc_5cc" data-ofbid="id__note_evg_rmc_5cc"><span class="note__title">注：</span>
|
||
<p class="- topic/p p" data-ofbid="d147895e85__20250121171610">每个板卡的 <span class="+ topic/ph sw-d/filepath ph filepath">pinmux.c</span>都定义了各个端口的 GPIO 引脚及功能，新增接口前应检查。</p>
|
||
</div><div class="- topic/p p" data-ofbid="d147895e91__20250121171610">根据原理图，GT911：<ul class="- topic/ul ul simple" id="id__ul_qwg_4vp_wcc" data-ofbid="id__ul_qwg_4vp_wcc"><li class="- topic/li li" data-ofbid="d147895e94__20250121171610">
|
||
<p class="- topic/p p" data-ofbid="d147895e96__20250121171610">使用 I2C3 接口 作为驱动。</p>
|
||
</li><li class="- topic/li li" data-ofbid="d147895e99__20250121171610">
|
||
<p class="- topic/p p" data-ofbid="d147895e101__20250121171610">除了 I2C 的 SCK 和 SDA 引脚 以外，还需要用到 RST 和 INT 引脚。</p>
|
||
</li></ul></div></div>
|
||
</li><li class="- topic/li li" data-ofbid="d147895e105__20250121171610">
|
||
<div class="- topic/div div section" id="id__kconfig"><strong class="+ topic/ph hi-d/b ph b">配置源码 Kconfig </strong>
|
||
<div class="- topic/p p" data-ofbid="d147895e111__20250121171610">在驱动源码 Kconfig <span class="+ topic/ph sw-d/filepath ph filepath">bsp/peripheral/touch/gt911/Kconfig</span> 文件夹中，添加
|
||
GT911
|
||
驱动的配置选项。内容如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_nhj_ckq_gdc" data-ofbid="id__codeblock_nhj_ckq_gdc">$ cat Kconfig
|
||
|
||
menu <span class="hl-string">"Gt911 touch panel options"</span>
|
||
|
||
config AIC_TOUCH_PANEL_GT911
|
||
bool <span class="hl-string">"Using touch panel gt911"</span>
|
||
<strong class="hl-keyword">default</strong> n
|
||
select AIC_I2C_DRV
|
||
|
||
config AIC_TOUCH_PANEL_GT911_I2C_CHA
|
||
string <span class="hl-string">"gt911 using i2c channel index"</span>
|
||
<strong class="hl-keyword">default</strong> <span class="hl-string">"i2c3"</span>
|
||
depends on AIC_TOUCH_PANEL_GT911
|
||
|
||
config AIC_TOUCH_PANEL_GT911_RST_PIN
|
||
string <span class="hl-string">"gt911 reset pin"</span>
|
||
<strong class="hl-keyword">default</strong> <span class="hl-string">"PA.8"</span>
|
||
depends on AIC_TOUCH_PANEL_GT911
|
||
|
||
config AIC_TOUCH_PANEL_GT911_INT_PIN
|
||
string <span class="hl-string">"gt911 irq pin"</span>
|
||
<strong class="hl-keyword">default</strong> <span class="hl-string">"PA.9"</span>
|
||
depends on AIC_TOUCH_PANEL_GT911
|
||
|
||
endmenu</pre></div></div>
|
||
</li><li class="- topic/li li" data-ofbid="d147895e119__20250121171610">
|
||
<div class="- topic/div div section" id="id__id5">添加<strong class="+ topic/ph hi-d/b ph b">外设驱动 Kconfig</strong> 的引用。<div class="- topic/p p" data-ofbid="d147895e126__20250121171610">在
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">bsp/peripheral/Kconfig</span> 文件中，添加对驱动源码 Kconfig
|
||
路径的引用：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_hyw_r25_hdc" data-ofbid="id__codeblock_hyw_r25_hdc">...
|
||
#--------------------------------------------
|
||
# touch panel driver global option
|
||
#--------------------------------------------
|
||
|
||
menu <span class="hl-string">"Touch Panel Support"</span>
|
||
source <span class="hl-string">"bsp/peripheral/touch/gt911/Kconfig"</span>
|
||
endmenu
|
||
|
||
...</pre></div>
|
||
</div>
|
||
</li><li class="- topic/li li" data-ofbid="d147895e135__20250121171610">
|
||
<div class="- topic/div div section" id="id__menuconfig"><strong class="+ topic/ph hi-d/b ph b">配置 menuconfig </strong>
|
||
<div class="- topic/p p" data-ofbid="d147895e141__20250121171610">运行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">scons --menuconfig</span> 或 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">me</span> (OneStep
|
||
命令)，打开 <span class="+ topic/keyword pr-d/parmname keyword parmname">I2C3</span> 并配置为 <span class="+ topic/keyword pr-d/parmname keyword parmname">Master</span>，使能 GT911
|
||
驱动。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_ygm_2kq_gdc" data-ofbid="id__codeblock_ygm_2kq_gdc">Board options --->
|
||
[*] Using I2c3
|
||
I2c3 Parameter --->
|
||
I2c3 Master && Slave (Master) --->
|
||
Drivers options --->
|
||
Peripheral --->
|
||
Touch Panel Support --->
|
||
Gt911 touch panel options --->
|
||
[*] Using touch panel gt911
|
||
(i2c0) gt911 using i2c channel index
|
||
(PA.<span class="hl-number">10</span>) gt911 reset pin
|
||
(PA.<span class="hl-number">11</span>) gt911 irq pin</pre></div></div>
|
||
</li><li class="- topic/li li" data-ofbid="d147895e158__20250121171610">
|
||
<div class="- topic/div div section" id="id__id6"><strong class="+ topic/ph hi-d/b ph b">编译</strong>
|
||
<p class="- topic/p p" data-ofbid="d147895e164__20250121171610">完成驱动添加和配置后，使用命令 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">scons --menuconfig</span> 或 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">m</span>
|
||
( OneStep 命令 ) 对 SDK 进行编译。</p>
|
||
</div>
|
||
</li><li class="- topic/li li" data-ofbid="d147895e174__20250121171610">
|
||
<div class="- topic/div div section" id="id__id7"><strong class="+ topic/ph hi-d/b ph b">验证</strong>
|
||
<p class="- topic/p p" data-ofbid="d147895e180__20250121171610">烧写镜像，系统启动之后，通过 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">list_device</span> 命令
|
||
查看设备节点是否已成功枚举，如下所示：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_wwg_4vp_wcc" data-ofbid="id__pre_wwg_4vp_wcc">list_device</pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_utn_gnm_tdc" data-ofbid="id__codeblock_utn_gnm_tdc">device type ref count
|
||
-------- -------------------- ----------
|
||
...
|
||
gt911 Touch Device <span class="hl-number">1</span>
|
||
...
|
||
</pre><p class="- topic/p p" data-ofbid="d147895e189__20250121171610">如果列表中出现 gt911 设备，表示已成功添加该设备。</p></div>
|
||
</li></ol>
|
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