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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/ctp-drive-migrate-demo.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">驱动文件移植解析</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
Read time: 19 minute(s)
</div><div class="- topic/body body"><p class="- topic/p p" data-ofbid="d93399e26__20250121171531">本节描述了 GT911 触摸屏驱动的初始化和配置示例，包括 I2C 通信、GPIO 引脚配置以及触摸事件的处理。</p><div class="- topic/div div"><strong class="+ topic/ph hi-d/b ph b">主要功能模块简介</strong><ol class="- topic/ol ol" id="ctp-drive-migrate-demo__ol_fts_gq3_ndc" data-ofbid="ctp-drive-migrate-demo__ol_fts_gq3_ndc"><li class="- topic/li li" data-ofbid="d93399e32__20250121171531">
<p class="- topic/p p" data-ofbid="d93399e34__20250121171531">I2C 通信初始化：</p>
<ul class="- topic/ul ul" id="ctp-drive-migrate-demo__ul_gfd_sw1_b2c" data-ofbid="ctp-drive-migrate-demo__ul_gfd_sw1_b2c"><li class="- topic/li li" data-ofbid="d93399e38__20250121171531"><code class="+ topic/ph pr-d/codeph ph codeph">gt911_client.bus</code> 获取 I2C 总线设备。</li><li class="- topic/li li" data-ofbid="d93399e42__20250121171531">打开 I2C 总线设备，并设置从机地址。</li></ul>
</li><li class="- topic/li li" data-ofbid="d93399e45__20250121171531">
<p class="- topic/p p" data-ofbid="d93399e47__20250121171531">GPIO 引脚配置：</p>
<div class="- topic/p p" data-ofbid="d93399e50__20250121171531">
<ul class="- topic/ul ul" id="ctp-drive-migrate-demo__ul_nfm_tw1_b2c" data-ofbid="ctp-drive-migrate-demo__ul_nfm_tw1_b2c"><li class="- topic/li li" data-ofbid="d93399e53__20250121171531">使用 <code class="+ topic/ph pr-d/codeph ph codeph">drv_pin_get</code> 函数获取复位引脚和中断引脚。</li><li class="- topic/li li" data-ofbid="d93399e58__20250121171531">
<div class="- topic/p p" data-ofbid="d93399e60__20250121171531">配置复位引脚和中断引脚为输入模式，并设置中断模式：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="ctp-drive-migrate-demo__codeblock_l35_kq3_ndc" data-ofbid="ctp-drive-migrate-demo__codeblock_l35_kq3_ndc"><strong class="hl-keyword">static</strong> <strong class="hl-keyword">int</strong> rt_gt911_gpio_cfg() {
<strong class="hl-keyword">unsigned</strong> <strong class="hl-keyword">int</strong> g, p;
<strong class="hl-keyword">long</strong> pin;
pin = drv_pin_get(AIC_TOUCH_PANEL_RST_PIN);
g = GPIO_GROUP(pin);
p = GPIO_GROUP_PIN(pin);
hal_gpio_direction_input(g, p);
pin = drv_pin_get(AIC_TOUCH_PANEL_INT_PIN);
g = GPIO_GROUP(pin);
p = GPIO_GROUP_PIN(pin);
hal_gpio_direction_input(g, p);
hal_gpio_set_irq_mode(g, p, <span class="hl-number">0</span>);
<strong class="hl-keyword">return</strong> <span class="hl-number">0</span>;
}</pre></div>
</li></ul>
</div>
</li><li class="- topic/li li" data-ofbid="d93399e67__20250121171531">
<p class="- topic/p p" data-ofbid="d93399e69__20250121171531">触摸事件处理：</p>
<ul class="- topic/ul ul" id="ctp-drive-migrate-demo__ul_jts_gq3_ndc" data-ofbid="ctp-drive-migrate-demo__ul_jts_gq3_ndc"><li class="- topic/li li" data-ofbid="d93399e73__20250121171531"><span class="+ topic/keyword pr-d/apiname keyword apiname">gt911_read_point()</span>
读取触摸点信息：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="ctp-drive-migrate-demo__codeblock_fpq_nq3_ndc" data-ofbid="ctp-drive-migrate-demo__codeblock_fpq_nq3_ndc"><strong class="hl-keyword">static</strong> rt_err_t gt911_read_point(<strong class="hl-keyword">struct</strong> rt_touch_device *touch, <strong class="hl-keyword">void</strong> *buf, rt_size_t read_num)</pre></li><li class="- topic/li li" data-ofbid="d93399e79__20250121171531"><span class="+ topic/keyword pr-d/apiname keyword apiname">gt911_control()</span> 控制 TP 设备，如获取
ID、校准等：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="ctp-drive-migrate-demo__codeblock_ecp_qq3_ndc" data-ofbid="ctp-drive-migrate-demo__codeblock_ecp_qq3_ndc"><strong class="hl-keyword">static</strong> rt_err_t gt911_control(<strong class="hl-keyword">struct</strong> rt_touch_device *touch, <strong class="hl-keyword">int</strong> cmd, <strong class="hl-keyword">void</strong> *arg)</pre></li><li class="- topic/li li" data-ofbid="d93399e85__20250121171531">注册了 <code class="+ topic/ph pr-d/codeph ph codeph">gt911_touch_ops</code> 结构体，将上述两个函数指针赋值给相应的操作函数。</li></ul>
</li><li class="- topic/li li" data-ofbid="d93399e91__20250121171531">
<p class="- topic/p p" data-ofbid="d93399e93__20250121171531">注册触摸设备：</p>
<ul class="- topic/ul ul" id="ctp-drive-migrate-demo__ul_wxl_3x1_b2c" data-ofbid="ctp-drive-migrate-demo__ul_wxl_3x1_b2c"><li class="- topic/li li" data-ofbid="d93399e97__20250121171531">
<p class="- topic/p p" data-ofbid="d93399e99__20250121171531">在 <code class="+ topic/ph pr-d/codeph ph codeph">rt_hw_gt911_init</code> 函数中，创建并初始化
<code class="+ topic/ph pr-d/codeph ph codeph">rt_touch_device</code> 结构体。</p>
<div class="- topic/p p" data-ofbid="d93399e108__20250121171531">分配内存并初始化触摸设备结构体，然后注册该设备：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="ctp-drive-migrate-demo__codeblock_dwl_mq3_ndc" data-ofbid="ctp-drive-migrate-demo__codeblock_dwl_mq3_ndc"><strong class="hl-keyword">static</strong> <strong class="hl-keyword">int</strong> rt_hw_gt911_init(<strong class="hl-keyword">const</strong> <strong class="hl-keyword">char</strong> *name, <strong class="hl-keyword">struct</strong> rt_touch_config *cfg) {
touch_device = (<strong class="hl-keyword">struct</strong> rt_touch_device *)rt_malloc(<strong class="hl-keyword">sizeof</strong>(<strong class="hl-keyword">struct</strong> rt_touch_device));
<strong class="hl-keyword">if</strong> (touch_device == RT_NULL) {
LOG_E(<span class="hl-string">"touch device malloc fail"</span>);
<strong class="hl-keyword">return</strong> -RT_ERROR;
}
rt_memset((<strong class="hl-keyword">void</strong> *)touch_device, <span class="hl-number">0</span>, <strong class="hl-keyword">sizeof</strong>(<strong class="hl-keyword">struct</strong> rt_touch_device));
touch_device-&gt;info.type = RT_TOUCH_TYPE_CAPACITANCE;
touch_device-&gt;info.vendor = RT_TOUCH_VENDOR_GT;
rt_memcpy(&amp;touch_device-&gt;config, cfg, <strong class="hl-keyword">sizeof</strong>(<strong class="hl-keyword">struct</strong> rt_touch_config));
touch_device-&gt;ops = &amp;gt911_touch_ops;
<strong class="hl-keyword">if</strong> (RT_EOK != rt_hw_touch_register(touch_device, name, RT_DEVICE_FLAG_INT_RX, RT_NULL)) {
LOG_E(<span class="hl-string">"touch device gt911 init failed !!!"</span>);
<strong class="hl-keyword">return</strong> -RT_ERROR;
}
LOG_I(<span class="hl-string">"touch device gt911 init success"</span>);
<strong class="hl-keyword">return</strong> RT_EOK;
}</pre></div>
</li><li class="- topic/li li" data-ofbid="d93399e113__20250121171531">调用 <code class="+ topic/ph pr-d/codeph ph codeph">rt_hw_touch_register</code> 函数注册触摸设备。</li></ul>
</li><li class="- topic/li li" data-ofbid="d93399e119__20250121171531">
<p class="- topic/p p" data-ofbid="d93399e121__20250121171531">硬件初始化：</p>
<p class="- topic/p p" data-ofbid="d93399e124__20250121171531">在 <code class="+ topic/ph pr-d/codeph ph codeph">rt_hw_gt911_port</code> 函数中，调用 <code class="+ topic/ph pr-d/codeph ph codeph">rt_hw_gt911_init</code>
完成设备的初始化和注册。</p>
</li></ol></div><div class="- topic/div div"><strong class="+ topic/ph hi-d/b ph b">完整代码示例</strong><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="ctp-drive-migrate-demo__codeblock_zkq_vq3_ndc" data-ofbid="ctp-drive-migrate-demo__codeblock_zkq_vq3_ndc">#include &lt;rtthread.h&gt;
#include &lt;rtdevice.h&gt;
#include &lt;string.h&gt;
#<span class="hl-directive">define</span> DBG_TAG <span class="hl-string">"gt911"</span>
#<span class="hl-directive">define</span> DBG_LVL DBG_INFO
#include &lt;rtdbg.h&gt;
#include <span class="hl-string">"gt911.h"</span>
<em class="hl-comment">//dev 结构体定义，其他 TP 也需要定义这个变量</em>
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">struct</strong> rt_i2c_client gt911_client;
<em class="hl-comment">//这个是 gt911 特有的数组用于更改固件的，没这需求的可以不定义</em>
<strong class="hl-keyword">static</strong> rt_uint8_t GT911_CFG_TBL[] = {
<span class="hl-number">0x6b</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x04</span>, <span class="hl-number">0x58</span>, <span class="hl-number">0x02</span>, <span class="hl-number">0x05</span>, <span class="hl-number">0x0d</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x01</span>, <span class="hl-number">0x0f</span>, <span class="hl-number">0x28</span>, <span class="hl-number">0x0f</span>,
<span class="hl-number">0x50</span>, <span class="hl-number">0x32</span>, <span class="hl-number">0x03</span>, <span class="hl-number">0x05</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>,
<span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x8a</span>, <span class="hl-number">0x2a</span>, <span class="hl-number">0x0c</span>, <span class="hl-number">0x45</span>, <span class="hl-number">0x47</span>, <span class="hl-number">0x0c</span>, <span class="hl-number">0x08</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>,
<span class="hl-number">0x00</span>, <span class="hl-number">0x40</span>, <span class="hl-number">0x03</span>, <span class="hl-number">0x2c</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x01</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x03</span>, <span class="hl-number">0x64</span>, <span class="hl-number">0x32</span>,
<span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x28</span>, <span class="hl-number">0x64</span>, <span class="hl-number">0x94</span>, <span class="hl-number">0xd5</span>, <span class="hl-number">0x02</span>, <span class="hl-number">0x07</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x04</span>,
<span class="hl-number">0x95</span>, <span class="hl-number">0x2c</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x8b</span>, <span class="hl-number">0x34</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x82</span>, <span class="hl-number">0x3f</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x7d</span>, <span class="hl-number">0x4c</span>, <span class="hl-number">0x00</span>,
<span class="hl-number">0x7a</span>, <span class="hl-number">0x5b</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x7a</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>,
<span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>,
<span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>,
<span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x18</span>, <span class="hl-number">0x16</span>, <span class="hl-number">0x14</span>, <span class="hl-number">0x12</span>, <span class="hl-number">0x10</span>, <span class="hl-number">0x0e</span>, <span class="hl-number">0x0c</span>, <span class="hl-number">0x0a</span>,
<span class="hl-number">0x08</span>, <span class="hl-number">0x06</span>, <span class="hl-number">0x04</span>, <span class="hl-number">0x02</span>, <span class="hl-number">0xff</span>, <span class="hl-number">0xff</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>,
<span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x16</span>, <span class="hl-number">0x18</span>,
<span class="hl-number">0x1c</span>, <span class="hl-number">0x1d</span>, <span class="hl-number">0x1e</span>, <span class="hl-number">0x1f</span>, <span class="hl-number">0x20</span>, <span class="hl-number">0x21</span>, <span class="hl-number">0x22</span>, <span class="hl-number">0x24</span>, <span class="hl-number">0x13</span>, <span class="hl-number">0x12</span>, <span class="hl-number">0x10</span>, <span class="hl-number">0x0f</span>,
<span class="hl-number">0x0a</span>, <span class="hl-number">0x08</span>, <span class="hl-number">0x06</span>, <span class="hl-number">0x04</span>, <span class="hl-number">0x02</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0xff</span>, <span class="hl-number">0xff</span>, <span class="hl-number">0xff</span>, <span class="hl-number">0xff</span>, <span class="hl-number">0xff</span>, <span class="hl-number">0xff</span>,
<span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>,
<span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x00</span>, <span class="hl-number">0x79</span>, <span class="hl-number">0x01</span>,
};
<em class="hl-comment">/*
* I2C 写函数，主要传参有三个：dev,要写入的数据，写入数据的长度
* 这个函数适用于所有的 TP，编写的时候只需要更换函数名字，跟 TP 对应上即可
*/</em>
<strong class="hl-keyword">static</strong> rt_err_t gt911_write_reg(<strong class="hl-keyword">struct</strong> rt_i2c_client *dev, rt_uint8_t *data,
rt_uint8_t len)
{
<strong class="hl-keyword">struct</strong> rt_i2c_msg msgs;
<em class="hl-comment">//从机的设备地址，在初始化的时候会进行赋值</em>
msgs.addr = dev-&gt;client_addr;
<em class="hl-comment">//I2C 读写标志，这里是写标志</em>
msgs.flags = RT_I2C_WR;
<em class="hl-comment">//要发送的数据</em>
msgs.buf = data;
<em class="hl-comment">//数据长度</em>
msgs.len = len;
<strong class="hl-keyword">if</strong> (rt_i2c_transfer(dev-&gt;bus, &amp;msgs, <span class="hl-number">1</span>) == <span class="hl-number">1</span>) {
<strong class="hl-keyword">return</strong> RT_EOK;
} <strong class="hl-keyword">else</strong> {
<strong class="hl-keyword">return</strong> -RT_ERROR;
}
}
<em class="hl-comment">/*
* I2C 读函数，主要传参有四个：dev,要读取的寄存器地址，接受数据的 buf，读取的长度
* 这个函数适用于所有的 TP，编写的时候只需要更换函数名字，跟 TP 对应上即可
*/</em>
<strong class="hl-keyword">static</strong> rt_err_t gt911_read_regs(<strong class="hl-keyword">struct</strong> rt_i2c_client *dev, rt_uint8_t *reg,
rt_uint8_t *data, rt_uint8_t len)
{
<strong class="hl-keyword">struct</strong> rt_i2c_msg msgs[<span class="hl-number">2</span>];
msgs[<span class="hl-number">0</span>].addr = dev-&gt;client_addr;
msgs[<span class="hl-number">0</span>].flags = RT_I2C_WR;
<em class="hl-comment">/*
* 要读取得寄存器地址,目前市面上有两种常见得 TP，一种是 16 位寄存器地址的，一种是 8 位的
* 16 位的寄存器地址需要先发送高 8 位，再发送低 8 位，分成两个 buf
* 8 位的直接发送即可
*/</em>
msgs[<span class="hl-number">0</span>].buf = reg;
<em class="hl-comment">// 这里的长度对应上面的 16 位或者 8 位，16 位长度为 2，8 位长度为 1</em>
msgs[<span class="hl-number">0</span>].len = GT911_REGITER_LEN;
msgs[<span class="hl-number">1</span>].addr = dev-&gt;client_addr;
msgs[<span class="hl-number">1</span>].flags = RT_I2C_RD;
msgs[<span class="hl-number">1</span>].buf = data;
msgs[<span class="hl-number">1</span>].len = len;
<strong class="hl-keyword">if</strong> (rt_i2c_transfer(dev-&gt;bus, msgs, <span class="hl-number">2</span>) == <span class="hl-number">2</span>) {
<strong class="hl-keyword">return</strong> RT_EOK;
} <strong class="hl-keyword">else</strong> {
<strong class="hl-keyword">return</strong> -RT_ERROR;
}
}
<em class="hl-comment">/*
* 这个函数主要用于获取 TP 的 ID，有些 TP 并没有具体获取 ID 的寄存器公开，可以不添加
*/</em>
<strong class="hl-keyword">static</strong> rt_err_t gt911_get_product_id(<strong class="hl-keyword">struct</strong> rt_i2c_client *dev,
rt_uint8_t *data, rt_uint8_t len)
{
rt_uint8_t reg[<span class="hl-number">2</span>];
<em class="hl-comment">// 这里就是将 16 位的寄存器地址拆开高 8 位低 8 位两个 buf 进行传输</em>
reg[<span class="hl-number">0</span>] = (rt_uint8_t)(GT911_PRODUCT_ID &gt;&gt; <span class="hl-number">8</span>);
reg[<span class="hl-number">1</span>] = (rt_uint8_t)(GT911_PRODUCT_ID &amp; <span class="hl-number">0xff</span>);
<strong class="hl-keyword">if</strong> (gt911_read_regs(dev, reg, data, len) != RT_EOK) {
LOG_E(<span class="hl-string">"read id failed"</span>);
<strong class="hl-keyword">return</strong> -RT_ERROR;
}
<strong class="hl-keyword">return</strong> RT_EOK;
}
<em class="hl-comment">/*
* 这个函数主要用于获取 TP 的参数，包括：xy 的坐标范围最大值，触摸点的个数
*/</em>
<strong class="hl-keyword">static</strong> rt_err_t gt911_get_info(<strong class="hl-keyword">struct</strong> rt_i2c_client *dev,
<strong class="hl-keyword">struct</strong> rt_touch_info *info)
{
rt_uint8_t reg[<span class="hl-number">2</span>];
rt_uint8_t out_info[<span class="hl-number">7</span>];
rt_uint8_t out_len = <span class="hl-number">7</span>;
reg[<span class="hl-number">0</span>] = (rt_uint8_t)(GT911_CONFIG_REG &gt;&gt; <span class="hl-number">8</span>);
reg[<span class="hl-number">1</span>] = (rt_uint8_t)(GT911_CONFIG_REG &amp; <span class="hl-number">0xFF</span>);
<strong class="hl-keyword">if</strong> (gt911_read_regs(dev, reg, out_info, out_len) != RT_EOK) {
LOG_E(<span class="hl-string">"read info failed"</span>);
<strong class="hl-keyword">return</strong> -RT_ERROR;
}
<em class="hl-comment">/*
* 这里是对获取到的数据进行组合得到参数信息
* 有些 TP 对这些寄存器并不开放，因此我们也可以通过直接赋值的方法设置参数
* 设置的参数要跟 TP 自带的固件对应上才能正常使用，具体操作如下
*/</em>
info-&gt;range_x = (out_info[<span class="hl-number">2</span>] &lt;&lt; <span class="hl-number">8</span>) | out_info[<span class="hl-number">1</span>];
<em class="hl-comment">//info-&gt;range_x = AIC_TOUCH_X_COORDINATE_RANGE;</em>
<em class="hl-comment">//这里的 AIC_TOUCH_X_COORDINATE_RANGE 就是公用参数那里可以配置的，所以不同 TP 都可通用</em>
info-&gt;range_y = (out_info[<span class="hl-number">4</span>] &lt;&lt; <span class="hl-number">8</span>) | out_info[<span class="hl-number">3</span>];
<em class="hl-comment">//info-&gt;range_y = AIC_TOUCH_Y_COORDINATE_RANGE;</em>
<em class="hl-comment">//这里的 AIC_TOUCH_Y_COORDINATE_RANGE 也是公用参数那里可以配置的，所以不同 TP 都可通用</em>
info-&gt;point_num = out_info[<span class="hl-number">5</span>] &amp; <span class="hl-number">0x0f</span>;
<em class="hl-comment">//info-&gt;point_num = 5;</em>
<strong class="hl-keyword">if</strong> (info-&gt;point_num &gt; GT911_MAX_TOUCH) {
info-&gt;point_num = GT911_MAX_TOUCH;
rt_kprintf(<span class="hl-string">"Warning,tp support more than 5 points, limited to 5 points\n"</span>);
}
<strong class="hl-keyword">return</strong> RT_EOK;
}
<em class="hl-comment">/*
* 这里的静态变量主要是为了存储坐标点的数据，然后作逻辑判断
* GT911_MAX_TOUCH 是最大的触摸点个数也就是上面 info-&gt;point_num 定义的 5，所以数组赋值了 5 个-1 作为初始值
* 不同的触摸个数这个数组大小不一样
*/</em>
<strong class="hl-keyword">static</strong> int16_t pre_x[GT911_MAX_TOUCH] = { -<span class="hl-number">1</span>, -<span class="hl-number">1</span>, -<span class="hl-number">1</span>, -<span class="hl-number">1</span>, -<span class="hl-number">1</span> };
<strong class="hl-keyword">static</strong> int16_t pre_y[GT911_MAX_TOUCH] = { -<span class="hl-number">1</span>, -<span class="hl-number">1</span>, -<span class="hl-number">1</span>, -<span class="hl-number">1</span>, -<span class="hl-number">1</span> };
<em class="hl-comment">//这个 pre_w 是触摸面积的定义,有些 TP 并没有相关描述，所以不是必须的，但 xy 是必须要有</em>
<strong class="hl-keyword">static</strong> int16_t pre_w[GT911_MAX_TOUCH] = { -<span class="hl-number">1</span>, -<span class="hl-number">1</span>, -<span class="hl-number">1</span>, -<span class="hl-number">1</span>, -<span class="hl-number">1</span> };
<strong class="hl-keyword">static</strong> rt_uint8_t s_tp_dowm[GT911_MAX_TOUCH] = {<span class="hl-number">0</span>};
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">struct</strong> rt_touch_data *read_data = RT_NULL;
<em class="hl-comment">/*
* 这个是抬起事件上报函数，修改函数名即可使用
* 如果定义上面的静态数组的时候没有定义 pre_w 则下面代码关于 pre_w 的要删除
*/</em>
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">void</strong> gt911_touch_up(<strong class="hl-keyword">void</strong> *buf, int8_t id)
{
read_data = (<strong class="hl-keyword">struct</strong> rt_touch_data *)buf;
<strong class="hl-keyword">if</strong> (s_tp_dowm[id] == <span class="hl-number">1</span>) {
s_tp_dowm[id] = <span class="hl-number">0</span>;
read_data[id].event = RT_TOUCH_EVENT_UP;
} <strong class="hl-keyword">else</strong> {
read_data[id].event = RT_TOUCH_EVENT_NONE;
}
read_data[id].timestamp = rt_touch_get_ts();
<em class="hl-comment">//下面的这行可以删除</em>
read_data[id].width = pre_w[id];
read_data[id].x_coordinate = pre_x[id];
read_data[id].y_coordinate = pre_y[id];
read_data[id].track_id = id;
pre_x[id] = -<span class="hl-number">1</span>; <em class="hl-comment">/* last point is none */</em>
pre_y[id] = -<span class="hl-number">1</span>;
<em class="hl-comment">//下面的这行可以删除</em>
pre_w[id] = -<span class="hl-number">1</span>;
}
<em class="hl-comment">/*
* 这个是移动和按下事件函数，修改函数名即可使用
* 如果定义上面的静态数组的时候没有定义 pre_w 则下面代码关于 pre_w 的要删除
* 包括函数传参里面的 int16_t w 也要删除
*/</em>
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">void</strong> gt911_touch_down(<strong class="hl-keyword">void</strong> *buf, int8_t id, int16_t x, int16_t y,
int16_t w)
{
read_data = (<strong class="hl-keyword">struct</strong> rt_touch_data *)buf;
<strong class="hl-keyword">if</strong> (s_tp_dowm[id] == <span class="hl-number">1</span>) {
read_data[id].event = RT_TOUCH_EVENT_MOVE;
} <strong class="hl-keyword">else</strong> {
read_data[id].event = RT_TOUCH_EVENT_DOWN;
s_tp_dowm[id] = <span class="hl-number">1</span>;
}
read_data[id].timestamp = rt_touch_get_ts();
<em class="hl-comment">//下面的这行可以删除</em>
read_data[id].width = w;
read_data[id].x_coordinate = x;
read_data[id].y_coordinate = y;
read_data[id].track_id = id;
pre_x[id] = x; <em class="hl-comment">/* save last point */</em>
pre_y[id] = y;
<em class="hl-comment">//下面的这行可以删除</em>
pre_w[id] = w;
}
<em class="hl-comment">/*
* 这个读取坐标点数据的函数，必须实现
*/</em>
<strong class="hl-keyword">static</strong> rt_size_t gt911_read_point(<strong class="hl-keyword">struct</strong> rt_touch_device *touch, <strong class="hl-keyword">void</strong> *buf,
rt_size_t read_num)
{
rt_uint8_t point_status = <span class="hl-number">0</span>;
rt_uint8_t touch_num = <span class="hl-number">0</span>;
rt_uint8_t write_buf[<span class="hl-number">3</span>];
rt_uint8_t cmd[<span class="hl-number">2</span>];
<em class="hl-comment">//要读取的数据的长度，一般是读取坐标数量*每一个坐标信息的 buf 长度+一些其他信息</em>
rt_uint8_t read_buf[<span class="hl-number">8</span> * GT911_MAX_TOUCH] = { <span class="hl-number">0</span> };
rt_uint8_t read_index;
int8_t read_id = <span class="hl-number">0</span>;
int16_t input_x = <span class="hl-number">0</span>;
int16_t input_y = <span class="hl-number">0</span>;
int16_t input_w = <span class="hl-number">0</span>;
<em class="hl-comment">//存储上一次触摸点个数</em>
<strong class="hl-keyword">static</strong> rt_uint8_t pre_touch = <span class="hl-number">0</span>;
<em class="hl-comment">//存储上一次坐标 ID 的数组</em>
<strong class="hl-keyword">static</strong> int8_t pre_id[GT911_MAX_TOUCH] = { <span class="hl-number">0</span> };
<em class="hl-comment">//这里是对传参过来的 buf 清零，避免 buf 里面已有数据对坐标读取产生影响</em>
rt_memset(buf, <span class="hl-number">0</span>, <strong class="hl-keyword">sizeof</strong>(<strong class="hl-keyword">struct</strong> rt_touch_data) * read_num);
<em class="hl-comment">/* point status register */</em>
cmd[<span class="hl-number">0</span>] = (rt_uint8_t)((GT911_READ_STATUS &gt;&gt; <span class="hl-number">8</span>) &amp; <span class="hl-number">0xFF</span>);
cmd[<span class="hl-number">1</span>] = (rt_uint8_t)(GT911_READ_STATUS &amp; <span class="hl-number">0xFF</span>);
<strong class="hl-keyword">if</strong> (gt911_read_regs(&amp;gt911_client, cmd, &amp;point_status, <span class="hl-number">1</span>) != RT_EOK) {
LOG_D(<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">if</strong> (point_status == <span class="hl-number">0</span>) <em class="hl-comment">/* no data */</em>
{
read_num = <span class="hl-number">0</span>;
<strong class="hl-keyword">goto</strong> exit_;
}
<strong class="hl-keyword">if</strong> ((point_status &amp; <span class="hl-number">0x80</span>) == <span class="hl-number">0</span>) <em class="hl-comment">/* data is not ready */</em>
{
read_num = <span class="hl-number">0</span>;
<strong class="hl-keyword">goto</strong> exit_;
}
<em class="hl-comment">//触摸点个数赋值</em>
touch_num = point_status &amp; <span class="hl-number">0x0f</span>; <em class="hl-comment">/* get point num */</em>
<strong class="hl-keyword">if</strong> (touch_num &gt; GT911_MAX_TOUCH) <em class="hl-comment">/* point num is not correct */</em>
{
read_num = <span class="hl-number">0</span>;
<strong class="hl-keyword">goto</strong> exit_;
}
cmd[<span class="hl-number">0</span>] = (rt_uint8_t)((GT911_POINT1_REG &gt;&gt; <span class="hl-number">8</span>) &amp; <span class="hl-number">0xFF</span>);
cmd[<span class="hl-number">1</span>] = (rt_uint8_t)(GT911_POINT1_REG &amp; <span class="hl-number">0xFF</span>);
<em class="hl-comment">//读取坐标数据</em>
<strong class="hl-keyword">if</strong> (gt911_read_regs(&amp;gt911_client, cmd, read_buf,
read_num * GT911_POINT_INFO_NUM) != RT_EOK) {
LOG_D(<span class="hl-string">"read point failed\n"</span>);
read_num = <span class="hl-number">0</span>;
<strong class="hl-keyword">goto</strong> exit_;
}
<em class="hl-comment">/*
* 下面是对坐标事件的处理，一般可以直接照抄，更换一下信息即可
*/</em>
<strong class="hl-keyword">if</strong> (pre_touch &gt; touch_num) <em class="hl-comment">/* point up */</em>
{
<strong class="hl-keyword">for</strong> (read_index = <span class="hl-number">0</span>; read_index &lt; pre_touch; read_index++) {
rt_uint8_t j;
<strong class="hl-keyword">for</strong> (j = <span class="hl-number">0</span>; j &lt; touch_num; j++) <em class="hl-comment">/* this time touch num */</em>
{
<em class="hl-comment">//坐标 ID 这里是需要更换的，要按照规格书来赋值</em>
read_id = read_buf[j * <span class="hl-number">8</span>] &amp; <span class="hl-number">0x0F</span>;
<strong class="hl-keyword">if</strong> (pre_id[read_index] == read_id) <em class="hl-comment">/* this id is not free */</em>
<strong class="hl-keyword">break</strong>;
<strong class="hl-keyword">if</strong> (j &gt;= touch_num - <span class="hl-number">1</span>) {
rt_uint8_t up_id;
up_id = pre_id[read_index];
gt911_touch_up(buf, up_id);
}
}
}
}
<strong class="hl-keyword">if</strong> (touch_num) <em class="hl-comment">/* point down */</em>
{
rt_uint8_t off_set;
<strong class="hl-keyword">for</strong> (read_index = <span class="hl-number">0</span>; read_index &lt; touch_num; read_index++) {
<em class="hl-comment">//这个 offset 是一个坐标信息的偏移，8 代表一个坐标要读取 8 个 byte，具体是多少按照规格书来</em>
off_set = read_index * <span class="hl-number">8</span>;
<em class="hl-comment">//坐标 ID 这里是需要更换的，要按照规格书来赋值</em>
read_id = read_buf[off_set] &amp; <span class="hl-number">0x0f</span>;
pre_id[read_index] = read_id;
<em class="hl-comment">//下面的 xyw 也是需要按照规格书重新组合 buf</em>
input_x =
read_buf[off_set + <span class="hl-number">1</span>] | (read_buf[off_set + <span class="hl-number">2</span>] &lt;&lt; <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>] &lt;&lt; <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>] &lt;&lt; <span class="hl-number">8</span>); <em class="hl-comment">/* size */</em>
gt911_touch_down(buf, read_id, input_x, input_y, input_w);
}
} <strong class="hl-keyword">else</strong> <strong class="hl-keyword">if</strong> (pre_touch) {
<strong class="hl-keyword">for</strong> (read_index = <span class="hl-number">0</span>; read_index &lt; pre_touch; read_index++) {
gt911_touch_up(buf, pre_id[read_index]);
}
}
<em class="hl-comment">//将当前的触摸点个数赋值给 pre_touch</em>
pre_touch = touch_num;
exit_:
<em class="hl-comment">//这里是 gt911 特有的每次读取完数据要发送 0x00 完成同步，没有这个要求的不需要实现</em>
write_buf[<span class="hl-number">0</span>] = (rt_uint8_t)((GT911_READ_STATUS &gt;&gt; <span class="hl-number">8</span>) &amp; <span class="hl-number">0xFF</span>);
write_buf[<span class="hl-number">1</span>] = (rt_uint8_t)(GT911_READ_STATUS &amp; <span class="hl-number">0xFF</span>);
write_buf[<span class="hl-number">2</span>] = <span class="hl-number">0x00</span>;
gt911_write_reg(&amp;gt911_client, write_buf, <span class="hl-number">3</span>);
<em class="hl-comment">//返回触摸点个数</em>
<strong class="hl-keyword">return</strong> read_num;
}
<em class="hl-comment">/*
* TP 的控制函数，一般来说只需要实现 RT_TOUCH_CTRL_GET_INFO，其他的可以不管
*/</em>
<strong class="hl-keyword">static</strong> rt_err_t gt911_control(<strong class="hl-keyword">struct</strong> rt_touch_device *touch, <strong class="hl-keyword">int</strong> cmd, <strong class="hl-keyword">void</strong> *arg)
{
<strong class="hl-keyword">if</strong> (cmd == RT_TOUCH_CTRL_GET_ID) {
<strong class="hl-keyword">return</strong> gt911_get_product_id(&amp;gt911_client, arg, <span class="hl-number">6</span>);
}
<strong class="hl-keyword">if</strong> (cmd == RT_TOUCH_CTRL_GET_INFO) {
<strong class="hl-keyword">return</strong> gt911_get_info(&amp;gt911_client, arg);
}
rt_uint8_t buf[<span class="hl-number">4</span>];
rt_uint8_t i = <span class="hl-number">0</span>;
rt_uint8_t *config;
config =
(rt_uint8_t *)rt_calloc(<span class="hl-number">1</span>, <strong class="hl-keyword">sizeof</strong>(GT911_CFG_TBL) + GT911_REGITER_LEN);
<strong class="hl-keyword">if</strong> (config == RT_NULL) {
LOG_D(<span class="hl-string">"malloc config memory failed\n"</span>);
<strong class="hl-keyword">return</strong> -RT_ERROR;
}
config[<span class="hl-number">0</span>] = (rt_uint8_t)((GT911_CONFIG_REG &gt;&gt; <span class="hl-number">8</span>) &amp; <span class="hl-number">0xFF</span>);
config[<span class="hl-number">1</span>] = (rt_uint8_t)(GT911_CONFIG_REG &amp; <span class="hl-number">0xFF</span>);
memcpy(&amp;config[<span class="hl-number">2</span>], GT911_CFG_TBL, <strong class="hl-keyword">sizeof</strong>(GT911_CFG_TBL));
<strong class="hl-keyword">switch</strong> (cmd) {
<strong class="hl-keyword">case</strong> RT_TOUCH_CTRL_SET_X_RANGE: {
rt_uint16_t x_range;
x_range = *(rt_uint16_t *)arg;
config[<span class="hl-number">4</span>] = (rt_uint8_t)(x_range &gt;&gt; <span class="hl-number">8</span>);
config[<span class="hl-number">3</span>] = (rt_uint8_t)(x_range &amp; <span class="hl-number">0xff</span>);
GT911_CFG_TBL[<span class="hl-number">2</span>] = config[<span class="hl-number">4</span>];
GT911_CFG_TBL[<span class="hl-number">1</span>] = config[<span class="hl-number">3</span>];
<strong class="hl-keyword">break</strong>;
}
<strong class="hl-keyword">case</strong> RT_TOUCH_CTRL_SET_Y_RANGE: {
rt_uint16_t y_range;
y_range = *(rt_uint16_t *)arg;
config[<span class="hl-number">6</span>] = (rt_uint8_t)(y_range &gt;&gt; <span class="hl-number">8</span>);
config[<span class="hl-number">5</span>] = (rt_uint8_t)(y_range &amp; <span class="hl-number">0xff</span>);
GT911_CFG_TBL[<span class="hl-number">4</span>] = config[<span class="hl-number">6</span>];
GT911_CFG_TBL[<span class="hl-number">3</span>] = config[<span class="hl-number">5</span>];
<strong class="hl-keyword">break</strong>;
}
<strong class="hl-keyword">case</strong> RT_TOUCH_CTRL_SET_X_TO_Y: {
config[<span class="hl-number">8</span>] ^= (<span class="hl-number">1</span> &lt;&lt; <span class="hl-number">3</span>);
<strong class="hl-keyword">break</strong>;
}
<strong class="hl-keyword">case</strong> RT_TOUCH_CTRL_SET_MODE: {
rt_uint16_t trig_type;
trig_type = *(rt_uint16_t *)arg;
<strong class="hl-keyword">switch</strong> (trig_type) {
<strong class="hl-keyword">case</strong> RT_DEVICE_FLAG_INT_RX:
config[<span class="hl-number">8</span>] &amp;= <span class="hl-number">0xFC</span>;
<strong class="hl-keyword">break</strong>;
<strong class="hl-keyword">case</strong> RT_DEVICE_FLAG_RDONLY:
config[<span class="hl-number">8</span>] &amp;= <span class="hl-number">0xFC</span>;
config[<span class="hl-number">8</span>] |= <span class="hl-number">0x02</span>;
<strong class="hl-keyword">break</strong>;
<strong class="hl-keyword">default</strong>:
<strong class="hl-keyword">break</strong>;
}
<strong class="hl-keyword">break</strong>;
}
<strong class="hl-keyword">default</strong>: {
<strong class="hl-keyword">break</strong>;
}
}
<strong class="hl-keyword">if</strong> (gt911_write_reg(&amp;gt911_client, config,
<strong class="hl-keyword">sizeof</strong>(GT911_CFG_TBL) + GT911_ADDR_LEN) != RT_EOK) {
LOG_D(<span class="hl-string">"send config failed"</span>);
<strong class="hl-keyword">return</strong> -<span class="hl-number">1</span>;
}
buf[<span class="hl-number">0</span>] = (rt_uint8_t)((GT911_CHECK_SUM &gt;&gt; <span class="hl-number">8</span>) &amp; <span class="hl-number">0xFF</span>);
buf[<span class="hl-number">1</span>] = (rt_uint8_t)(GT911_CHECK_SUM &amp; <span class="hl-number">0xFF</span>);
buf[<span class="hl-number">2</span>] = <span class="hl-number">0</span>;
<strong class="hl-keyword">for</strong> (i = GT911_ADDR_LEN; i &lt; <strong class="hl-keyword">sizeof</strong>(GT911_CFG_TBL) + GT911_ADDR_LEN; i++) {
buf[GT911_ADDR_LEN] += config[i];
}
buf[<span class="hl-number">2</span>] = (~buf[<span class="hl-number">2</span>]) + <span class="hl-number">1</span>;
buf[<span class="hl-number">3</span>] = <span class="hl-number">1</span>;
gt911_write_reg(&amp;gt911_client, buf, <span class="hl-number">4</span>);
rt_free(config);
<strong class="hl-keyword">return</strong> RT_EOK;
}
<em class="hl-comment">/*
* rt_touch_ops，主要是完成对读坐标和控制 TP 的函数注册
*/</em>
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">struct</strong> rt_touch_ops gt911_touch_ops = {
.touch_readpoint = gt911_read_point,
.touch_control = gt911_control,
};
<em class="hl-comment">/*
* 这个函数主要实现对 TP 的初始操作
*/</em>
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">int</strong> rt_hw_gt911_init(<strong class="hl-keyword">const</strong> <strong class="hl-keyword">char</strong> *name, <strong class="hl-keyword">struct</strong> rt_touch_config *cfg)
{
<strong class="hl-keyword">struct</strong> rt_touch_device *touch_device = RT_NULL;
touch_device =
(<strong class="hl-keyword">struct</strong> rt_touch_device *)rt_malloc(<strong class="hl-keyword">sizeof</strong>(<strong class="hl-keyword">struct</strong> rt_touch_device));
<strong class="hl-keyword">if</strong> (touch_device == RT_NULL) {
LOG_E(<span class="hl-string">"touch device malloc fail"</span>);
<strong class="hl-keyword">return</strong> -RT_ERROR;
}
rt_memset((<strong class="hl-keyword">void</strong> *)touch_device, <span class="hl-number">0</span>, <strong class="hl-keyword">sizeof</strong>(<strong class="hl-keyword">struct</strong> rt_touch_device));
<em class="hl-comment">//这里是对 TP 一些上下电的操作，具体根据规格书来</em>
<em class="hl-comment">/* hw init*/</em>
<em class="hl-comment">// rst output 0</em>
rt_pin_mode(*(rt_uint8_t *)cfg-&gt;user_data, PIN_MODE_OUTPUT);
rt_pin_write(*(rt_uint8_t *)cfg-&gt;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-&gt;irq_pin.pin, PIN_MODE_OUTPUT);
rt_pin_write(cfg-&gt;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-&gt;user_data, PIN_MODE_OUTPUT);
rt_pin_write(*(rt_uint8_t *)cfg-&gt;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-&gt;user_data, PIN_MODE_INPUT);
<em class="hl-comment">//irq output 0</em>
rt_pin_mode(cfg-&gt;irq_pin.pin, PIN_MODE_OUTPUT);
rt_pin_write(cfg-&gt;irq_pin.pin, PIN_LOW);
rt_thread_delay(<span class="hl-number">50</span>);
<em class="hl-comment">//最后必须要对 IRQ 引脚设置回输入模式，不然会影响中断信号的获取</em>
rt_pin_mode(cfg-&gt;irq_pin.pin, PIN_MODE_INPUT);
gt911_client.bus =
(<strong class="hl-keyword">struct</strong> rt_i2c_bus_device *)rt_device_find(cfg-&gt;dev_name);
<strong class="hl-keyword">if</strong> (gt911_client.bus == RT_NULL) {
LOG_E(<span class="hl-string">"Can't find %s device"</span>, cfg-&gt;dev_name);
<strong class="hl-keyword">return</strong> -RT_ERROR;
}
<em class="hl-comment">//打开设备中断模式用 RT_DEVICE_FLAG_RDWR</em>
<strong class="hl-keyword">if</strong> (rt_device_open((rt_device_t)gt911_client.bus, RT_DEVICE_FLAG_RDWR) !=
RT_EOK) {
LOG_E(<span class="hl-string">"open %s device failed"</span>, cfg-&gt;dev_name);
<strong class="hl-keyword">return</strong> -RT_ERROR;
}
<em class="hl-comment">//从机设备地址赋值</em>
gt911_client.client_addr = GT911_ADDRESS_HIGH;
<em class="hl-comment">/* register touch device */</em>
<em class="hl-comment">//赋值芯片的型号和类型</em>
touch_device-&gt;info.type = RT_TOUCH_TYPE_CAPACITANCE;
touch_device-&gt;info.vendor = RT_TOUCH_VENDOR_GT;
rt_memcpy(&amp;touch_device-&gt;config, cfg, <strong class="hl-keyword">sizeof</strong>(<strong class="hl-keyword">struct</strong> rt_touch_config));
touch_device-&gt;ops = &amp;gt911_touch_ops;
<strong class="hl-keyword">if</strong> (RT_EOK != rt_hw_touch_register(touch_device, name, RT_DEVICE_FLAG_INT_RX, RT_NULL)) {
LOG_E(<span class="hl-string">"touch device gt911 init failed !!!"</span>);
<strong class="hl-keyword">return</strong> -RT_ERROR;
}
LOG_I(<span class="hl-string">"touch device gt911 init success"</span>);
<strong class="hl-keyword">return</strong> RT_EOK;
}
<em class="hl-comment">/*
* 这个函数主要实现对 GPIO 的初始化，这个函数只需修改函数名即可复用
*/</em>
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">int</strong> rt_gt911_gpio_cfg()
{
<strong class="hl-keyword">unsigned</strong> <strong class="hl-keyword">int</strong> g, p;
<strong class="hl-keyword">long</strong> pin;
<em class="hl-comment">// AIC_TOUCH_PANEL_RST_PIN 是公用参数里面的复位引脚</em>
pin = drv_pin_get(AIC_TOUCH_PANEL_RST_PIN);
g = GPIO_GROUP(pin);
p = GPIO_GROUP_PIN(pin);
hal_gpio_direction_input(g, p);
<em class="hl-comment">// AIC_TOUCH_PANEL_INT_PIN 是公用参数里面的中断引脚</em>
pin = drv_pin_get(AIC_TOUCH_PANEL_INT_PIN);
g = GPIO_GROUP(pin);
p = GPIO_GROUP_PIN(pin);
hal_gpio_direction_input(g, p);
hal_gpio_set_irq_mode(g, p, <span class="hl-number">0</span>);
<strong class="hl-keyword">return</strong> <span class="hl-number">0</span>;
}
<em class="hl-comment">/*
* 这个函数主要注册整个设备，改个名字即可复用
*/</em>
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">int</strong> rt_hw_gt911_port(<strong class="hl-keyword">void</strong>)
{
<strong class="hl-keyword">struct</strong> rt_touch_config cfg;
rt_uint8_t rst_pin;
rt_gt911_gpio_cfg();
rst_pin = drv_pin_get(AIC_TOUCH_PANEL_RST_PIN);
cfg.dev_name = AIC_TOUCH_PANEL_I2C_CHAN;
cfg.irq_pin.pin = drv_pin_get(AIC_TOUCH_PANEL_INT_PIN);
cfg.irq_pin.mode = PIN_MODE_INPUT;
cfg.user_data = &amp;rst_pin;
#ifdef AIC_PM_DEMO
rt_pm_set_pin_wakeup_source(cfg.irq_pin.pin);
#endif
<em class="hl-comment">// AIC_TOUCH_PANEL_NAME 这个是公用参数里面设备名字，也可以直接复用</em>
rt_hw_gt911_init(AIC_TOUCH_PANEL_NAME, &amp;cfg);
<strong class="hl-keyword">return</strong> <span class="hl-number">0</span>;
}
<em class="hl-comment">//通过宏 ``INIT_DEVICE_EXPORT``，驱动在系统启动时自动加载,即可轻松适配不同型号的触控芯片</em>
INIT_DEVICE_EXPORT(rt_hw_gt911_port);</pre></div></div></article></main></div>
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