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data-id="touch-configure" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/peripheral/touch-configure.html" id="touch-configure-d5856e2208-link">测试指南</a></div></div></li><li role="treeitem"><div data-tocid="touch_faq-d5856e2220" class="topicref" data-id="touch_faq" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/peripheral/touch-faq.html" id="touch_faq-d5856e2220-link">常见问题</a></div></div></li></ul></li><li role="treeitem"><div data-tocid="id-d5856e2232" class="topicref" data-id="id" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/peripheral/wifi.html" id="id-d5856e2232-link">无线网络</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e2244" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" 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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/peripheral/touch-obtain-key-info.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">获取和配置 IC 关键信息</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 6 minute(s)
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</div><div class="- topic/body body"><div class="- topic/p p" data-ofbid="d258943e26__20250121171716">执行 CTP 移植流程之前，须获取触摸 IC 的关键信息，包括但不限于：<ul class="- topic/ul ul" id="touch_obtain_key_info__ul_tvc_wyv_12c" data-ofbid="touch_obtain_key_info__ul_tvc_wyv_12c"><li class="- topic/li li" data-ofbid="d258943e29__20250121171716">
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<p class="- topic/p p" data-ofbid="d258943e31__20250121171716">从机设备地址</p>
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</li><li class="- topic/li li" data-ofbid="d258943e34__20250121171716">
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<div class="- topic/p p" data-ofbid="d258943e36__20250121171716">触摸坐标信息，须至少包含下列信息：<ul class="- topic/ul ul" id="touch_obtain_key_info__ul_klg_4gb_b2c" data-ofbid="touch_obtain_key_info__ul_klg_4gb_b2c"><li class="- topic/li li" data-ofbid="d258943e39__20250121171716">触摸点 ID 号</li><li class="- topic/li li" data-ofbid="d258943e41__20250121171716">X 轴坐标值</li><li class="- topic/li li" data-ofbid="d258943e43__20250121171716">Y 轴坐标值</li><li class="- topic/li li" data-ofbid="d258943e45__20250121171716">触摸点个数</li><li class="- topic/li li" data-ofbid="d258943e47__20250121171716">硬件上电时序</li></ul></div>
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</li></ul></div><section class="- topic/section section" id="touch_obtain_key_info__section_crj_xyv_12c" data-ofbid="touch_obtain_key_info__section_crj_xyv_12c"><h2 class="- topic/title title sectiontitle">从机设备地址</h2>
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<div class="- topic/p p" data-ofbid="d258943e55__20250121171716">获取触摸芯片的从机地址是主控和外设通信的关键步骤，常见的获取从机设备地址的方法如下所示：<ul class="- topic/ul ul" id="touch_obtain_key_info__ul_q1g_zyv_12c" data-ofbid="touch_obtain_key_info__ul_q1g_zyv_12c"><li class="- topic/li li" data-ofbid="d258943e58__20250121171716">
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<p class="- topic/p p" data-ofbid="d258943e60__20250121171716">执行硬件扫描：</p>
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<div class="- topic/p p" data-ofbid="d258943e63__20250121171716">通过 <code class="+ topic/ph pr-d/codeph ph codeph">i2c-tools</code> 扫描硬件获取从机设备的地址，须确保硬件连接正常。详细流程如下：<ol class="- topic/ol ol" id="touch_obtain_key_info__ul_e5t_dzv_12c" data-ofbid="touch_obtain_key_info__ul_e5t_dzv_12c"><li class="- topic/li li" data-ofbid="d258943e69__20250121171716">使能 <code class="+ topic/ph pr-d/codeph ph codeph">i2c-tools</code> 测试代码。
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="touch_obtain_key_info__codeblock_bqk_kzv_12c" data-ofbid="touch_obtain_key_info__codeblock_bqk_kzv_12c">Local packages options --->
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Third-party packages options --->
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[*] i2c-tools: a collection of i2c tools including scan/read/write</pre></li><li class="- topic/li li" data-ofbid="d258943e76__20250121171716">
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<p class="- topic/p p" data-ofbid="d258943e78__20250121171716">在任意串口执行 <code class="+ topic/ph pr-d/codeph ph codeph">i2c scan <var class="+ topic/keyword sw-d/varname keyword varname">i2c
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interface</var></code> 命令，例如：</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="touch_obtain_key_info__codeblock_vjt_tzv_12c" data-ofbid="touch_obtain_key_info__codeblock_vjt_tzv_12c">i2c scan i2c1</pre>
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<p class="- topic/p p" data-ofbid="d258943e89__20250121171716"><var class="+ topic/keyword sw-d/varname keyword varname">i2c interface</var> 需按照实际使用的接口进行设置。</p>
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<div class="- topic/p p" data-ofbid="d258943e94__20250121171716">系统输出示例如下，表示 GT911 当前的从机地址为
|
||
0x5D：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="touch_obtain_key_info__codeblock_msp_yzv_12c" data-ofbid="touch_obtain_key_info__codeblock_msp_yzv_12c"><span class="hl-number">00</span> <span class="hl-number">01</span> <span class="hl-number">02</span> <span class="hl-number">03</span> <span class="hl-number">04</span> <span class="hl-number">05</span> <span class="hl-number">06</span> <span class="hl-number">07</span> <span class="hl-number">08</span> <span class="hl-number">09</span> <span class="hl-number">0</span>A <span class="hl-number">0</span>B <span class="hl-number">0</span>C <span class="hl-number">0</span>D <span class="hl-number">0E</span> <span class="hl-number">0F</span>
|
||
<span class="hl-number">00</span>: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
|
||
<span class="hl-number">10</span>: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
|
||
<span class="hl-number">20</span>: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
|
||
<span class="hl-number">30</span>: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
|
||
<span class="hl-number">40</span>: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
|
||
<span class="hl-number">50</span>: -- -- -- -- -- -- -- -- -- -- -- -- -- <span class="hl-number">5</span>D -- --
|
||
<span class="hl-number">60</span>: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
|
||
<span class="hl-number">70</span>: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --</pre></div>
|
||
</li></ol></div>
|
||
<div class="- topic/note note note note_note" id="touch_obtain_key_info__note_kgt_c1w_12c" data-ofbid="touch_obtain_key_info__note_kgt_c1w_12c"><span class="note__title">注：</span>
|
||
<code class="+ topic/ph pr-d/codeph ph codeph">i2c-tools</code>
|
||
也可以用于检测主控与外设之间的硬件连接关系是否正常。如果执行上述命令后扫描不到任何从机地址，则需检查硬件是否正常以及
|
||
I<sup class="+ topic/ph hi-d/sup ph sup">2</sup>C 是否有外部上拉电阻等情况。</div>
|
||
</li><li class="- topic/li li" data-ofbid="d258943e109__20250121171716">
|
||
<p class="- topic/p p" data-ofbid="d258943e111__20250121171716">从对应 IC 的规格书中获取信息。</p>
|
||
<div class="- topic/p p" data-ofbid="d258943e114__20250121171716">通常情况下，IC 规格书会按照以下方式列示相关从机地址：<ul class="- topic/ul ul" id="touch_obtain_key_info__ul_thd_t1w_12c" data-ofbid="touch_obtain_key_info__ul_thd_t1w_12c"><li class="- topic/li li" data-ofbid="d258943e117__20250121171716">
|
||
<div class="- topic/p p" data-ofbid="d258943e119__20250121171716">直接提供 7 位从机地址。例如，GSL3676 的规格书中列示了 7 位从机地址为 0x40。<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="touch_obtain_key_info__image_gsy_dbw_12c" src="../../../images/ctp/gsl_slave_addr.png" width="240" alt="gsl_slave_addr"/></div><br/></div>
|
||
<div class="- topic/p p" data-ofbid="d258943e125__20250121171716">如果直接列示了从机地址，则在新建或修改 CTP 驱动时，直接使用该从机地址，例如位
|
||
0x40。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="touch_obtain_key_info__codeblock_fkq_sbw_12c" data-ofbid="touch_obtain_key_info__codeblock_fkq_sbw_12c">#<span class="hl-directive">define</span> GSL3676_SLAVE_ADDR <span class="hl-number">0x40</span>
|
||
gsl3676_client.client_addr = GSL3676_SLAVE_ADDR;</pre></div>
|
||
</li><li class="- topic/li li" data-ofbid="d258943e130__20250121171716">
|
||
<p class="- topic/p p" data-ofbid="d258943e132__20250121171716">列示含读写位（8 位）的从机地址。例如，GT911 的规格书给出 0xBA/ 0xBB
|
||
的从机地址，差值为 1，说明列示的地址为 8 位，含读写位。</p>
|
||
<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="touch_obtain_key_info__image_asb_bcw_12c" src="../../../images/ctp/gt911_slave_addr.png" width="384" alt="gt911_slave_addr"/></div><br/>
|
||
<div class="- topic/p p" data-ofbid="d258943e139__20250121171716">如果列示了含读写位的 8 位从机地址，则在新建或修改 CTP 驱动时，须将地址右移 1 位，例如将 0xBA/0xBB
|
||
右移 1 位后得到 0x5D
|
||
的从机地址。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="touch_obtain_key_info__codeblock_avn_gcw_12c" data-ofbid="touch_obtain_key_info__codeblock_avn_gcw_12c">#<span class="hl-directive">define</span> GT911_ADDRESS_HIGH <span class="hl-number">0x5D</span>
|
||
gt911_client.client_addr = GT911_ADDRESS_HIGH;</pre></div>
|
||
</li></ul></div>
|
||
</li></ul></div>
|
||
</section><section class="- topic/section section" id="touch_obtain_key_info__section_hz5_4cw_12c" data-ofbid="touch_obtain_key_info__section_hz5_4cw_12c"><h2 class="- topic/title title sectiontitle">触摸点 ID 号</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d258943e151__20250121171716">坐标数据的数组内容存储都是以 ID 作为下标索引，可在规格书中搜索包含 ID 字样的字段，示例如下：<ul class="- topic/ul ul" id="touch_obtain_key_info__ul_u4z_3gb_b2c" data-ofbid="touch_obtain_key_info__ul_u4z_3gb_b2c"><li class="- topic/li li" data-ofbid="d258943e154__20250121171716">Track ID 示例：<div class="- topic/p p" data-ofbid="d258943e156__20250121171716">
|
||
<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="touch_obtain_key_info__image_hbl_rfb_b2c" src="../../../images/ctp/ft7252_track_id.png" alt="ft7252_track_id"/></div><br/>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="touch_obtain_key_info__codeblock_yql_tfb_b2c" data-ofbid="touch_obtain_key_info__codeblock_yql_tfb_b2c"> off_set = read_index * C145HAX01_POINT_INFO_LEN;
|
||
read_id = (read_buf[off_set + <span class="hl-number">3</span>] >> <span class="hl-number">4</span>) & <span class="hl-number">0x0f</span>;
|
||
pre_id[read_index] = read_id;
|
||
input_x = ((read_buf[off_set + <span class="hl-number">1</span>] & <span class="hl-number">0x0f</span>) << <span class="hl-number">8</span>) | read_buf[off_set + <span class="hl-number">2</span>];
|
||
input_y = ((read_buf[off_set + <span class="hl-number">3</span>] & <span class="hl-number">0xf</span>) << <span class="hl-number">8</span>) | read_buf[off_set + <span class="hl-number">4</span>];</pre>
|
||
</div></li><li class="- topic/li li" data-ofbid="d258943e165__20250121171716">Touch ID 示例：<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="touch_obtain_key_info__image_pvh_dgb_b2c" src="../../../images/ctp/gt911_track_id.png" alt="gt911_track_id"/></div><br/><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="touch_obtain_key_info__codeblock_efg_3gb_b2c" data-ofbid="touch_obtain_key_info__codeblock_efg_3gb_b2c"> off_set = read_index * <span class="hl-number">8</span>;
|
||
read_id = read_buf[off_set] & <span class="hl-number">0x0f</span>;
|
||
pre_id[read_index] = read_id;
|
||
input_x = read_buf[off_set + <span class="hl-number">1</span>] | (read_buf[off_set + <span class="hl-number">2</span>] << <span class="hl-number">8</span>); <em class="hl-comment">/* x */</em>
|
||
input_y = read_buf[off_set + <span class="hl-number">3</span>] | (read_buf[off_set + <span class="hl-number">4</span>] << <span class="hl-number">8</span>); <em class="hl-comment">/* y */</em>
|
||
input_w = read_buf[off_set + <span class="hl-number">5</span>] | (read_buf[off_set + <span class="hl-number">6</span>] << <span class="hl-number">8</span>); <em class="hl-comment">/* size */</em></pre></li></ul></div>
|
||
</section><section class="- topic/section section" id="touch_obtain_key_info__section_i2g_vgb_b2c" data-ofbid="touch_obtain_key_info__section_i2g_vgb_b2c"><h2 class="- topic/title title sectiontitle">XY 坐标计算</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d258943e178__20250121171716">常见 CTP 的 XY 在 16 bit 的数据范围内，一般由两个字节组合而成，需要通过一定的逻辑计算出真实的坐标值。</p>
|
||
<div class="- topic/p p" data-ofbid="d258943e181__20250121171716">在处理 CTP 的 XY 坐标时，通常需要将两个字节组合成一个 16
|
||
位的数据。一个坐标值通常由高位和低位组合而成。以下是如何通过逻辑操作从读取缓冲区中提取坐标值并将其存储为变量的详细步骤：<figure class="- topic/fig fig fignone" id="touch_obtain_key_info__fig_y1b_ygb_b2c" data-ofbid="touch_obtain_key_info__fig_y1b_ygb_b2c"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="touch_obtain_key_info__image_z1b_ygb_b2c" src="../../../images/ctp/gt911_xy_coordinate.png" width="384" alt="gt911_xy_coordinate"/></div><br/></figure><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="touch_obtain_key_info__codeblock_zmm_1hb_b2c" data-ofbid="touch_obtain_key_info__codeblock_zmm_1hb_b2c"> off_set = read_index * <span class="hl-number">8</span>;
|
||
read_id = read_buf[off_set] & <span class="hl-number">0x0f</span>;
|
||
pre_id[read_index] = read_id;
|
||
input_x = read_buf[off_set + <span class="hl-number">1</span>] | (read_buf[off_set + <span class="hl-number">2</span>] << <span class="hl-number">8</span>); <em class="hl-comment">/* x */</em>
|
||
input_y = read_buf[off_set + <span class="hl-number">3</span>] | (read_buf[off_set + <span class="hl-number">4</span>] << <span class="hl-number">8</span>); <em class="hl-comment">/* y */</em>
|
||
input_w = read_buf[off_set + <span class="hl-number">5</span>] | (read_buf[off_set + <span class="hl-number">6</span>] << <span class="hl-number">8</span>); <em class="hl-comment">/* size */</em></pre></div>
|
||
</section><section class="- topic/section section" id="touch_obtain_key_info__section_sqp_xhb_b2c" data-ofbid="touch_obtain_key_info__section_sqp_xhb_b2c"><h2 class="- topic/title title sectiontitle">触摸点个数</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d258943e195__20250121171716">触摸事件可分为按下、移动和抬起，事件的获取是通过当前触摸点个数与上一次触摸点个数比较得到的，下面是几种比较常见的获取当前触摸点个数的方式：</p>
|
||
<ul class="- topic/ul ul" id="touch_obtain_key_info__ul_hgx_yhb_b2c" data-ofbid="touch_obtain_key_info__ul_hgx_yhb_b2c"><li class="- topic/li li" data-ofbid="d258943e199__20250121171716">
|
||
<p class="- topic/p p" data-ofbid="d258943e201__20250121171716">从寄存器可以直接获取当前的触摸点个数</p>
|
||
<figure class="- topic/fig fig fignone" id="touch_obtain_key_info__fig_igx_yhb_b2c" data-ofbid="touch_obtain_key_info__fig_igx_yhb_b2c"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="touch_obtain_key_info__image_jgx_yhb_b2c" src="../../../images/ctp/gt911_real_time_touch_num.png" width="480" alt="gt911_real_time_touch_num"/></div><br/></figure>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="touch_obtain_key_info__codeblock_fmj_l3b_b2c" data-ofbid="touch_obtain_key_info__codeblock_fmj_l3b_b2c">touch_num = point_status & <span class="hl-number">0x0f</span>; <em class="hl-comment">/* get point num */</em></pre>
|
||
</li><li class="- topic/li li" data-ofbid="d258943e212__20250121171716">
|
||
<p class="- topic/p p" data-ofbid="d258943e214__20250121171716">通过每根手指的触摸事件间接计算：</p>
|
||
<figure class="- topic/fig fig fignone" data-ofbid="d258943e217__20250121171716"><div class="- topic/figgroup figgroup"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="touch_obtain_key_info__image_j2c_bjb_b2c" src="../../../images/sdk/st77922_real_time_touch_num1.png" width="480"/></div><br/><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="touch_obtain_key_info__image_j2c_bjb_b2d" src="../../../images/sdk/st77922_real_time_touch_num2.png" width="480"/></div><br/><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="touch_obtain_key_info__image_j2c_bjb_b2e" src="../../../images/sdk/st77922_real_time_touch_num3.png" width="480"/></div><br/></div></figure>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="touch_obtain_key_info__codeblock_htr_m3b_b2c" data-ofbid="touch_obtain_key_info__codeblock_htr_m3b_b2c"> cmd[<span class="hl-number">0</span>] = (rt_uint8_t)((ST77922_TOUCH_INFO >> <span class="hl-number">8</span>) & <span class="hl-number">0xFF</span>);
|
||
cmd[<span class="hl-number">1</span>] = (rt_uint8_t)(ST77922_TOUCH_INFO & <span class="hl-number">0xFF</span>);
|
||
<em class="hl-comment">/* read point num is touch_num */</em>
|
||
<strong class="hl-keyword">if</strong> (st77922_read_regs(&st77922_client, cmd, read_buf, <strong class="hl-keyword">sizeof</strong>(read_buf)) != RT_EOK) {
|
||
rt_kprintf(<span class="hl-string">"read point failed\n"</span>);
|
||
read_num = <span class="hl-number">0</span>;
|
||
<strong class="hl-keyword">goto</strong> __exit;
|
||
}
|
||
|
||
<strong class="hl-keyword">for</strong> (i = <span class="hl-number">0</span>; i < ST77922_MAX_TOUCH; i++) {
|
||
num_valid = ((read_buf[<span class="hl-number">7</span> * i + <span class="hl-number">4</span>] & <span class="hl-number">0x80</span>) != <span class="hl-number">0</span>) ? <span class="hl-number">1</span> : <span class="hl-number">0</span>;
|
||
touch_num += num_valid;
|
||
}</pre>
|
||
</li></ul>
|
||
</section><section class="- topic/section section" id="touch_obtain_key_info__section_wxj_zhb_b2c" data-ofbid="touch_obtain_key_info__section_wxj_zhb_b2c"><h2 class="- topic/title title sectiontitle">TP 硬件上电时序</h2>
|
||
|
||
<figure class="- topic/fig fig fignone" id="touch_obtain_key_info__fig_xxj_zhb_b2c" data-ofbid="touch_obtain_key_info__fig_xxj_zhb_b2c"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="touch_obtain_key_info__image_yxj_zhb_b2c" src="../../../images/ctp/gt911_power_on.png" width="384" alt="gt911_power_on"/></div><br/></figure>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="touch_obtain_key_info__codeblock_cyx_f3b_b2c" data-ofbid="touch_obtain_key_info__codeblock_cyx_f3b_b2c"> rt_pin_mode(*(rt_uint8_t *)cfg->user_data, PIN_MODE_OUTPUT);
|
||
rt_pin_write(*(rt_uint8_t *)cfg->user_data, PIN_LOW);
|
||
rt_thread_delay(<span class="hl-number">10</span>);
|
||
<em class="hl-comment">// irq output 0</em>
|
||
rt_pin_mode(cfg->irq_pin.pin, PIN_MODE_OUTPUT);
|
||
rt_pin_write(cfg->irq_pin.pin, PIN_LOW);
|
||
rt_thread_delay(<span class="hl-number">2</span>);
|
||
<em class="hl-comment">// rst output 1</em>
|
||
rt_pin_mode(*(rt_uint8_t *)cfg->user_data, PIN_MODE_OUTPUT);
|
||
rt_pin_write(*(rt_uint8_t *)cfg->user_data, PIN_HIGH);
|
||
rt_thread_delay(<span class="hl-number">5</span>);
|
||
<em class="hl-comment">// rst input</em>
|
||
rt_pin_mode(*(rt_uint8_t *)cfg->user_data, PIN_MODE_INPUT);
|
||
<em class="hl-comment">//irq output 0</em>
|
||
rt_pin_mode(cfg->irq_pin.pin, PIN_MODE_OUTPUT);
|
||
rt_pin_write(cfg->irq_pin.pin, PIN_LOW);
|
||
rt_thread_delay(<span class="hl-number">50</span>);
|
||
rt_pin_mode(cfg->irq_pin.pin, PIN_MODE_INPUT);</pre>
|
||
</section></div></article></main></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="#touch_obtain_key_info__section_crj_xyv_12c" data-tocid="touch_obtain_key_info__section_crj_xyv_12c">从机设备地址</a></div></li><li class="section-item"><div class="section-title"><a href="#touch_obtain_key_info__section_hz5_4cw_12c" data-tocid="touch_obtain_key_info__section_hz5_4cw_12c">触摸点 ID 号</a></div></li><li class="section-item"><div class="section-title"><a href="#touch_obtain_key_info__section_i2g_vgb_b2c" data-tocid="touch_obtain_key_info__section_i2g_vgb_b2c">XY 坐标计算</a></div></li><li class="section-item"><div class="section-title"><a href="#touch_obtain_key_info__section_sqp_xhb_b2c" data-tocid="touch_obtain_key_info__section_sqp_xhb_b2c">触摸点个数</a></div></li><li class="section-item"><div class="section-title"><a href="#touch_obtain_key_info__section_wxj_zhb_b2c" data-tocid="touch_obtain_key_info__section_wxj_zhb_b2c">TP 硬件上电时序</a></div></li></ul></div>
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