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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://aicdocco/taskstopics/sdk/bringup/lite-bringup-display_mipi-dbi.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">MIPI-DBI</h1>
v1.2.1
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<div class="date inPage">16 May 2025</div><div style="color: gray;">
v1.2.0
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Read time: 3 minute(s)
</div>
<div class="- topic/body body">
v1.2.1
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<p class="- topic/p p" data-ofbid="d202087e28__20250519091528">本节介绍了开发一款新的 ArtInChip MIPI-DBI 屏驱动的流程，以确保驱动能够正确初始化并工作。</p>
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<p class="- topic/p p" data-ofbid="d202087e31__20250519091528">ArtInChip 平台支持以下 MIPI-DBI 类型：</p>
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<ul class="- topic/ul ul" id="section_t5h_xxn_42c__ul_ujc_w5y_p2c" data-ofbid="section_t5h_xxn_42c__ul_ujc_w5y_p2c">
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<li class="- topic/li li" data-ofbid="d202087e36__20250519091528">Type C: SPI</li>
<li class="- topic/li li" data-ofbid="d202087e39__20250519091528">Type B: I8080</li>
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</ul>
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<div class="- topic/p p" data-ofbid="d202087e43__20250519091528">MIPI-DBI 屏幕通常需要初始化，调试时需根据屏厂提供的资料，开发一款专用的驱动。开发步骤如下：<ol class="- topic/ol ol" id="section_t5h_xxn_42c__ol_wbs_h14_42c" data-ofbid="section_t5h_xxn_42c__ol_wbs_h14_42c">
<li class="- topic/li li" data-ofbid="d202087e47__20250519091528">新增一款屏驱动。<p class="- topic/p p" data-ofbid="d202087e49__20250519091528">根据屏幕的接口类型（Type B: I8080 或 Type C: SPI），从现有的参考文件中复制代码。</p><div class="- topic/p p" data-ofbid="d202087e51__20250519091528">
v1.2.0
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<ul class="- topic/ul ul" id="section_t5h_xxn_42c__ul_jpb_m14_42c" data-ofbid="section_t5h_xxn_42c__ul_jpb_m14_42c">
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<li class="- topic/li li" data-ofbid="d202087e55__20250519091528">Type B I8080 接口可参考：<span class="+ topic/ph sw-d/filepath ph filepath">panel_dbi_st7789.c</span></li>
<li class="- topic/li li" data-ofbid="d202087e60__20250519091528">Type C SPI 接口可参考：<span class="+ topic/ph sw-d/filepath ph filepath">panel_dbi_st7789t3.c</span></li>
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</ul>
</div></li>
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<li class="- topic/li li" data-ofbid="d202087e67__20250519091528">
<p class="- topic/p p" data-ofbid="d202087e69__20250519091528">将新文件重命名为 <span class="+ topic/ph sw-d/filepath ph filepath">panel_dbi_xxx.c</span>，其中 xxx 为屏驱 IC 型号。</p>
<p class="- topic/p p" data-ofbid="d202087e75__20250519091528">例如，屏驱 IC 型号为 st77903，则新文件名称为 <span class="+ topic/ph sw-d/filepath ph filepath">panel_dbi_st77903.c</span>。以下均以
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st77903 屏驱 IC 型号为例。</p>
</li>
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<li class="- topic/li li" data-ofbid="d202087e82__20250519091528">注册新驱动文件。<ul class="- topic/ul ul" id="section_t5h_xxn_42c__ul_i4n_514_42c" data-ofbid="section_t5h_xxn_42c__ul_i4n_514_42c">
<li class="- topic/li li" data-ofbid="d202087e86__20250519091528">修改 <span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/drv/display/panel/Kconfig</span>
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文件，添加配置项，让新驱动在 menuconfig
界面可见：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="section_t5h_xxn_42c__codeblock_j3n_cb4_42c" data-ofbid="section_t5h_xxn_42c__codeblock_j3n_cb4_42c">config AIC_PANEL_DBI_ST77903
bool <span class="hl-string">"ArtInChip MIPI DBI ST77903 panel"</span>
depends on AIC_DISP_MIPI_DBI</pre></li>
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<li class="- topic/li li" data-ofbid="d202087e94__20250519091528">修改 <span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/SConscript</span>
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文件，添加编译规则：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="section_t5h_xxn_42c__codeblock_ocz_db4_42c" data-ofbid="section_t5h_xxn_42c__codeblock_ocz_db4_42c"><strong class="hl-keyword">if</strong> GetDepend(<span class="hl-string">'AIC_PANEL_DBI_ST77903):
</span> src += Glob(<span class="hl-string">'drv/display/panel/panel_dbi_st77903.c'</span>)</pre></li>
</ul></li>
v1.2.1
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<li class="- topic/li li" data-ofbid="d202087e103__20250519091528">注册新 struct aic_panel 结构体。<ul class="- topic/ul ul" id="section_t5h_xxn_42c__ul_nlh_gb4_42c" data-ofbid="section_t5h_xxn_42c__ul_nlh_gb4_42c">
<li class="- topic/li li" data-ofbid="d202087e107__20250519091528">修改 <span class="+ topic/ph sw-d/filepath ph filepath">panel_dbi_st77903.c</span> 的 struct aic_panel 命名，重命名为
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dbi_st77903。</li>
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<li class="- topic/li li" data-ofbid="d202087e113__20250519091528">在 <span class="+ topic/ph sw-d/filepath ph filepath">panel_com.h</span> 中添加 <code class="+ topic/ph pr-d/codeph ph codeph">extern struct aic_panel
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dbi_st77903</code>：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="section_t5h_xxn_42c__codeblock_o34_4b4_42c" data-ofbid="section_t5h_xxn_42c__codeblock_o34_4b4_42c"><em class="hl-comment">// panel_com.h</em>
<strong class="hl-keyword">extern</strong> <strong class="hl-keyword">struct</strong> aic_panel dbi_xxx;</pre></li>
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<li class="- topic/li li" data-ofbid="d202087e124__20250519091528">将 dbi_st77903 添加到 <span class="+ topic/ph sw-d/filepath ph filepath">panel_com.c</span> 文件的 panels[]
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指针数组中：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="section_t5h_xxn_42c__codeblock_ts5_pb4_42c" data-ofbid="section_t5h_xxn_42c__codeblock_ts5_pb4_42c"><em class="hl-comment">// panel_com.c</em>
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">struct</strong> aic_panel *panels[] = {
...
#ifdef AIC_PANEL_DBI_st77903
&amp;dbi_st77903,
#endif
};</pre></li>
</ul></li>
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<li class="- topic/li li" data-ofbid="d202087e133__20250519091528">设置屏幕时序和接口参数。<ul class="- topic/ul ul" id="section_t5h_xxn_42c__ul_yqq_rb4_42c" data-ofbid="section_t5h_xxn_42c__ul_yqq_rb4_42c">
<li class="- topic/li li" data-ofbid="d202087e137__20250519091528">修改 struct display_timing 结构体，根据 LCD
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屏幕规格书修改时序参数。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="section_t5h_xxn_42c__codeblock_u1j_wb4_42c" data-ofbid="section_t5h_xxn_42c__codeblock_u1j_wb4_42c"><strong class="hl-keyword">static</strong> <strong class="hl-keyword">struct</strong> display_timing st77903_timing = {
.pixelclock = <span class="hl-number">130000000</span>,
.hactive = <span class="hl-number">1080</span>,
.hfront_porch = <span class="hl-number">160</span>,
.hback_porch = <span class="hl-number">160</span>,
.hsync_len = <span class="hl-number">40</span>,
.vactive = <span class="hl-number">1920</span>,
.vfront_porch = <span class="hl-number">10</span>,
.vback_porch = <span class="hl-number">20</span>,
.vsync_len = <span class="hl-number">8</span>,
};</pre></li>
v1.2.1
2025-07-22 11:15:46 +08:00
<li class="- topic/li li" data-ofbid="d202087e142__20250519091528">修改 struct panel_dbi 结构体，根据 LCD
v1.2.0
2025-04-23 17:54:31 +08:00
屏幕规格书修改显示接口类型并添加初始化命令。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="section_t5h_xxn_42c__codeblock_zcd_yb4_42c" data-ofbid="section_t5h_xxn_42c__codeblock_zcd_yb4_42c"><strong class="hl-keyword">static</strong> <strong class="hl-keyword">struct</strong> panel_dbi dbi = {
.type = SPI,
.format = SPI_<span class="hl-number">4L</span>INE_RGB565,
.commands = {
.buf = st7789t3_commands,
.len = ARRAY_SIZE(st7789t3_commands),
}
};</pre></li>
</ul></li>
v1.2.1
2025-07-22 11:15:46 +08:00
<li class="- topic/li li" data-ofbid="d202087e149__20250519091528">在 <span class="+ topic/ph sw-d/filepath ph filepath">pinmux.c</span> 文件中添加屏幕引脚，配置屏幕引脚功能。<div class="- topic/p p" data-ofbid="d202087e154__20250519091528">以 demo128-nand 工程为例，在
v1.2.0
2025-04-23 17:54:31 +08:00
<span class="+ topic/ph sw-d/filepath ph filepath">target/d21x/demo128-nand/pinmux.c</span>
中配置屏幕引脚，根据芯片型号和接口参数添加 MIPI-DBI 信号引脚，配置功能
2：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="section_t5h_xxn_42c__codeblock_p15_gc4_42c" data-ofbid="section_t5h_xxn_42c__codeblock_p15_gc4_42c">#ifdef AIC_PANEL_DBI_XXX
{<span class="hl-number">2</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PD.16"</span>},
{<span class="hl-number">2</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PD.17"</span>},
{<span class="hl-number">2</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PD.18"</span>},
{<span class="hl-number">2</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PD.19"</span>},
{<span class="hl-number">2</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PD.20"</span>},
{<span class="hl-number">2</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PD.21"</span>},
{<span class="hl-number">2</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PD.22"</span>},
{<span class="hl-number">2</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PD.23"</span>},
{<span class="hl-number">2</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PD.24"</span>},
{<span class="hl-number">2</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PD.25"</span>},
{<span class="hl-number">2</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PD.26"</span>},
{<span class="hl-number">2</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PD.27"</span>},
#endif</pre><ul class="- topic/ul ul" id="section_t5h_xxn_42c__ul_onb_lq4_42c" data-ofbid="section_t5h_xxn_42c__ul_onb_lq4_42c">
v1.2.1
2025-07-22 11:15:46 +08:00
<li class="- topic/li li" data-ofbid="d202087e163__20250519091528">Type B I8080 引脚定义如下：<div class="- topic/p p" data-ofbid="d202087e165__20250519091528">
v1.2.0
2025-04-23 17:54:31 +08:00
<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="section_t5h_xxn_42c__image_k2h_pq4_42c" src="../../../images/bringup/lite_bringup_i8080_pin.png"/></div><br/>
</div></li>
v1.2.1
2025-07-22 11:15:46 +08:00
<li class="- topic/li li" data-ofbid="d202087e170__20250519091528">Type C SPI 引脚定义如下：<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="section_t5h_xxn_42c__image_tqc_qq4_42c" src="../../../images/bringup/lite_bringup_spi_pin.png"/></div><br/></li>
v1.2.0
2025-04-23 17:54:31 +08:00
</ul></div></li>
v1.2.1
2025-07-22 11:15:46 +08:00
<li class="- topic/li li" data-ofbid="d202087e175__20250519091528">使能新建的 panel 驱动。<p class="- topic/p p" data-ofbid="d202087e177__20250519091528">在 Luban-Lite 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">me</span>，进入 menuconfig
v1.2.0
2025-04-23 17:54:31 +08:00
的功能配置界面。</p><ul class="- topic/ul ul" id="section_t5h_xxn_42c__ul_wlz_lc4_42c" data-ofbid="section_t5h_xxn_42c__ul_wlz_lc4_42c">
v1.2.1
2025-07-22 11:15:46 +08:00
<li class="- topic/li li" data-ofbid="d202087e184__20250519091528">选择显示接口类型 Display MIPI-DBI
v1.2.0
2025-04-23 17:54:31 +08:00
interface：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="section_t5h_xxn_42c__codeblock_zjv_pc4_42c" data-ofbid="section_t5h_xxn_42c__codeblock_zjv_pc4_42c">Board options ---&gt;
[*] Using Display Engine (DE)
Display Parameter ---&gt;
select Display interface (Display MIPI-DBI interface) ---&gt;</pre></li>
v1.2.1
2025-07-22 11:15:46 +08:00
<li class="- topic/li li" data-ofbid="d202087e189__20250519091528">选择新建的 ArtInChip MIPI DBI panel 驱动，即 ArtInChip MIPI DBI st77903
v1.2.0
2025-04-23 17:54:31 +08:00
panel：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="section_t5h_xxn_42c__codeblock_rm4_rc4_42c" data-ofbid="section_t5h_xxn_42c__codeblock_rm4_rc4_42c">Board options ---&gt;
[*] Using Display Engine (DE)
Display Parameter ---&gt;
Display Panels ---&gt;
ArtInChip Panel Drivers (ArtInChip MIPI DBI st77903 panel) ---&gt;</pre></li>
</ul></li>
</ol></div>
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