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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/display/display_debug_lite.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">调试指南</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
                    Read time: 2 minute(s)
                </div><div class="- topic/body body"><div class="- topic/p p" data-ofbid="d76997e19__20250121171524">
            <div class="- topic/note note note note_note" id="id__note_ftt_jjx_ddc" data-ofbid="id__note_ftt_jjx_ddc"><span class="note__title">注：</span> DE colorbar 优先级最高，进行其他测试前需要禁用 DE colorbar。</div>
        </div><section class="- topic/section section" id="id__section_zvf_lfx_ddc" data-ofbid="id__section_zvf_lfx_ddc"><h2 class="- topic/title title sectiontitle">打开调试开关</h2>
            
            <div class="- topic/div div section" id="id__id2">
                <div class="- topic/p p" data-ofbid="d76997e31__20250121171524">在 <span class="- topic/ph ph">Luban-Lite</span> 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">scons --menuconfig</span>，进入
                    menuconfig 的功能配置界面，按如下选择，启用显示驱动的调试信息输出 <span class="+ topic/keyword pr-d/apiname keyword apiname">pr_debug()</span>
                    ，并编译显示驱动测试用例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_d44_kfx_ddc" data-ofbid="id__codeblock_d44_kfx_ddc">Drivers options  ---&gt;
    Drivers debug  ---&gt;
        [*] Enable Display driver debug</pre></div>
                
            </div>
        </section><section class="- topic/section section" id="id__section_awf_lfx_ddc" data-ofbid="id__section_awf_lfx_ddc"><h2 class="- topic/title title sectiontitle">启动显示纯色矩形</h2>
            
            <div class="- topic/div div">
                <div class="- topic/p p" data-ofbid="d76997e53__20250121171524">在 <span class="- topic/ph ph">Luban-Lite</span> 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">scons --menuconfig</span>，进入 menuconfig
                    的功能配置界面，按如下选择：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_gvd_mfx_ddc" data-ofbid="id__codeblock_gvd_mfx_ddc">Board options  ---&gt;
   Graphics Support  ---&gt;
       [*] Display color block</pre></div>
                <p class="- topic/p p" data-ofbid="d76997e64__20250121171524">系统启动时，CPU 在 framebuffer 上绘制红，绿，蓝，黑和白五种纯色矩形，矩形大小为 100x100。</p>
                <div class="- topic/div div figure align-default">
                    <br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_utt_3fx_ddc" src="../../../images/display/lite_color_block.jpg" width="576" alt="/lite_color_block"/></div><br/>
                </div>
            </div>
        </section><section class="- topic/section section" id="id__section_pp5_mfx_ddc" data-ofbid="id__section_pp5_mfx_ddc"><h2 class="- topic/title title sectiontitle">调试 DE Color Bar 模式</h2>
            
            <div class="- topic/div div">
                <div class="- topic/p p" data-ofbid="d76997e82__20250121171524">显示引擎 Color Bar 模式，忽略 framebuffer 数据，直接向显示接口传输 Color Bar 数据。Color Bar
                        模式仅供调试使用。<div class="- topic/note note note note_note" id="id__note_ezn_qn3_ddc" data-ofbid="id__note_ezn_qn3_ddc"><span class="note__title">注：</span> 
                        <p class="- topic/p p" data-ofbid="d76997e86__20250121171524">DE Color Bar 优先级最高，进行其他测试前需要禁用 DE Color Bar。</p>
                    </div></div>
                
                <ul class="- topic/ul ul" id="id__ul_dwv_fjx_ddc" data-ofbid="id__ul_dwv_fjx_ddc"><li class="- topic/li li" data-ofbid="d76997e91__20250121171524">
                        <div class="- topic/p p" data-ofbid="d76997e93__20250121171524">使能 Color Bar
                            模式命令:<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_alw_xgx_ddc" data-ofbid="id__codeblock_alw_xgx_ddc">m <span class="hl-number">0x18a00004</span> <span class="hl-number">1</span>
m <span class="hl-number">0x18a00008</span> <span class="hl-number">1</span></pre></div>
                    </li><li class="- topic/li li" data-ofbid="d76997e98__20250121171524">
                        <div class="- topic/p p" data-ofbid="d76997e100__20250121171524">禁用 Color Bar
                            模式命令:<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_fkt_ygx_ddc" data-ofbid="id__codeblock_fkt_ygx_ddc">m <span class="hl-number">0x18a00004</span> <span class="hl-number">0</span>
m <span class="hl-number">0x18a00008</span> <span class="hl-number">1</span></pre></div>
                    </li></ul>
                
                
                
                <div class="- topic/div div figure align-default">
                    <br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_vtt_3fx_ddc" src="../../../images/display/lite_color_bar.jpg" width="576" alt="/lite_color_bar"/></div><br/>
                </div>
                
            </div>
        </section><section class="- topic/section section" id="id__section_p5w_4fx_ddc" data-ofbid="id__section_p5w_4fx_ddc"><h2 class="- topic/title title sectiontitle">测试背景色输出</h2>
            
            <div class="- topic/div div">
                <p class="- topic/p p" data-ofbid="d76997e121__20250121171524">显示引擎忽略 framebuffer 数据，输出特定背景色 。背景色测试可用于检测 RGB pin 的输出状态是否正确。</p>
                <div class="- topic/p p" data-ofbid="d76997e124__20250121171524">
                    <ul class="- topic/ul ul" id="id__ul_ltc_pjx_ddc" data-ofbid="id__ul_ltc_pjx_ddc"><li class="- topic/li li" data-ofbid="d76997e127__20250121171524">
                            <div class="- topic/p p" data-ofbid="d76997e129__20250121171524">设置背景色命令：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_tk2_zgx_ddc" data-ofbid="id__codeblock_tk2_zgx_ddc">bg_color -m <span class="hl-number">1</span> -r <span class="hl-number">128</span> -g <span class="hl-number">0</span> -b <span class="hl-number">0</span></pre></div>
                            <p class="- topic/p p" data-ofbid="d76997e134__20250121171524">上述命令生效后，仅 R7 引脚为高电平，其余数据 pin 为低电平。</p>
                        </li><li class="- topic/li li" data-ofbid="d76997e137__20250121171524">禁用背景色命令：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_jrp_zgx_ddc" data-ofbid="id__codeblock_jrp_zgx_ddc">bg_color -m <span class="hl-number">0</span></pre></li></ul>
                </div>
                <div class="- topic/div div figure align-default">
                    <br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_wtt_3fx_ddc" src="../../../images/display/lite_bg_red_128.jpg" width="576" alt="/lite_bg_red_128"/></div><br/>
                </div>
            </div>
        </section><section class="- topic/section section" id="id__section_s3t_pfx_ddc" data-ofbid="id__section_s3t_pfx_ddc"><h2 class="- topic/title title sectiontitle">获取 framebuffer 渐变色块</h2>
            
            <div class="- topic/div div">
                <p class="- topic/p p" data-ofbid="d76997e158__20250121171524">CPU 在 framebuffer 上绘制红，绿，蓝，白四种矩形渐变色块。色块高度自适应屏幕，宽度固定 256，颜色从 0-255
                    进行渐变，并在对角处附带标定信息。</p>
                <div class="- topic/p p" data-ofbid="d76997e161__20250121171524">framebuffer
                    绘制渐变色块命令：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_qs1_1hx_ddc" data-ofbid="id__codeblock_qs1_1hx_ddc">test_fb -b</pre></div>
                <div class="- topic/div div figure align-default">
                    <br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_xtt_3fx_ddc" src="../../../images/display/lite_testfb_color_block.jpg" width="576" alt="/lite_testfb_color_block"/></div><br/>
                </div>
                <ul class="- topic/ul ul simple" id="id__ul_ytt_3fx_ddc" data-ofbid="id__ul_ytt_3fx_ddc"><li class="- topic/li li" data-ofbid="d76997e174__20250121171524">
                        <p class="- topic/p p" data-ofbid="d76997e176__20250121171524"><span class="+ topic/keyword sw-d/cmdname keyword cmdname">test_fb-b</span> 命令直接修改 framebuffer 内容，显示效果不可逆。</p>
                    </li><li class="- topic/li li" data-ofbid="d76997e181__20250121171524">
                        <p class="- topic/p p" data-ofbid="d76997e183__20250121171524">支持 ARGB8888 和 RGB565 格式 framebuffer。</p>
                    </li><li class="- topic/li li" data-ofbid="d76997e186__20250121171524">
                        <p class="- topic/p p" data-ofbid="d76997e188__20250121171524">RGB565 格式，色块从 0-255 进行渐变，RGB 只有 32/64 色，每 4/8 个像素点共用一个颜色，会存在色阶现象。</p>
                    </li></ul>
            </div>
        </section></div></article></main></div>
                        
                        
                        
                        
                        
                        
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