【ESK32-360测评】+ TFT屏显示功能及扩展(4)
<p><span style="font-size:12pt"><span style="background:white"><span style="line-height:12.0pt"><span style="font-family:宋体"><span lang="EN-US" style="font-family:"微软雅黑","sans-serif""><span style="color:#444444"><span style="letter-spacing:.4pt">4. </span></span></span><span style="font-family:"微软雅黑","sans-serif""><span style="color:#444444"><span style="letter-spacing:.4pt">图片的显示</span></span></span></span></span></span></span></p><p><span style="font-size:12pt"><span style="background:white"><span style="line-height:12.0pt"><span style="font-family:宋体"><span style="font-size:10.5pt">在显示屏的例程中,提供图片的显示函数,那我们能否来显示自己的图片内容呢?</span></span></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">1<span style="font-family:宋体">)色彩模式的辨识</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">在我们显示自己的图片前,首先要弄清楚它所使用的色彩模式及图片格式等。</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">通过对例程中对色彩的定义,可以分析出它所使用的是</span>16<span style="font-family:宋体">位色,色彩模式为</span>R5G6B5<span style="font-family:宋体">。</span></span></span></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">2<span style="font-family:宋体">)制备图片显示的数据</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">例程中所提供的图片显示函数为:</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">void LCD_PicDraw(u8 X_Location, u16 Y_Location, u8 Height, u16 Width, uc8 *Pptr)</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">{</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> u32 xid = 0;</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> u32 ImgAdds = 0;</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> u32 yid = 0;</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> u32 i = 0, j = 0, color = 0;</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> xid = X_Location;</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> yid = Y_Location;</span></span></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_StarterSet(xid, yid);</span></span></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> for (i = 0; i < Height; i++) // <240</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> {</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_WriteRAMPrior(); </span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> for (j = 0; j < Width; j++) // <320</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> {</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> ImgAdds = (i * Width * 2) + (j * 2);</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> color = Pptr << 8 | (Pptr);</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_WriteRAM(color);</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> }</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> xid++;</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_StarterSet(xid, yid);</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> }</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">}</span></span></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">由此看出,所显示的图片是以字节为单位进行存储,每个像素点采用的色彩模式为</span>R5G6B5<span style="font-family:宋体">。</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">为此我们要显示一幅图片可以用</span>Image2Led<span style="font-family:宋体">软件来把图片转换为数组数据来存储,其转换前的参数设置如图</span>1<span style="font-family:宋体">所示,生成的文件如图</span>2<span style="font-family:宋体">所示。</span></span></span></p>
<p style="text-align:justify"></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">图</span>1 <span style="font-family:宋体">参数设置</span> </span></span></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">图</span>2 <span style="font-family:宋体">生成的文件</span></span></span></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">3<span style="font-family:宋体">)图片的显示</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">显示图</span>3<span style="font-family:宋体">所示效果的主程序为:</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">int main(void)</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">{</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_Init();</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_Config();</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_Clear(0x2c5c); </span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_BackColorSet(0x2c5c);</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_TextColorSet(Yellow);</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_CharDisplayA(Line1, 70, 0); </span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_CharDisplayA(Line1, 90, 1);</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_CharDisplayA(Line1, 110, 2);</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_CharDisplayA(Line1, 130, 3);</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_CharDisplayA(Line1, 150, 4);</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> LCD_PicDraw((100), (80), 68, 56, gImage_jsj);</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"> while (1);</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">}</span></span></p>
<p style="text-align:justify"></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">图</span>3 <span style="font-family:宋体">显示效果</span></span></span></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">值得指出的是当图片较大时,会出现异常现象,导致无法完成程序下载,见图</span>4<span style="font-family:宋体">和图</span>5<span style="font-family:宋体">所示。</span></span></span></p>
<p style="text-align:justify"></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">图</span>4<span style="font-family:宋体">通过编译</span></span></span></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"></p>
<p><span style="font-size:10.5pt"><span style="font-family:宋体">图</span></span><span lang="EN-US" style="font-size:10.5pt"><span style="font-family:"Calibri","sans-serif"">5</span></span><span style="font-size:10.5pt"><span style="font-family:宋体">下载时出现崩溃</span></span></p>
<p>是不是下载参数没配对,比实际flash大小设大了</p>
<p>下载失败的时候,Bulid output窗口还提示什么</p>
freebsder 发表于 2020-8-10 18:52
是不是下载参数没配对,比实际flash大小设大了
<p>好像不是</p>
宋元浩 发表于 2020-8-10 20:22
下载失败的时候,Bulid output窗口还提示什么
<p>没有其他提示了!</p>
jinglixixi 发表于 2020-8-11 08:52
没有其他提示了!
<p>找原厂吧,这种问题估计是bug之类的。</p>
宋元浩 发表于 2020-8-10 20:22
下载失败的时候,Bulid output窗口还提示什么
<p>看编译后的ROM好像差不多64K,合泰这块MCU的FLASH多大的</p>
<p>The devices operate at a frequency of up to 72 MHz with a Flash accelerator to obtain maximum efficiency. They provide up to 256 KB of embedded Flash memory for code/data storage and 32 KB of embedded SRAM memory for system operation and application program usage.</p>
freebsder 发表于 2020-8-11 20:54
找原厂吧,这种问题估计是bug之类的。
<p>估计是,以前类似的产品显示图片一般不成问题。还有一种可能会是调试下载工具吧,因为该开发板没有配自己的调试下载器。</p>
<p>楼主字体生成用的哪个工具。有好用的推荐吗?裸跑的时候还是要用。</p>
jinglixixi 发表于 2020-8-12 10:06
估计是,以前类似的产品显示图片一般不成问题。还有一种可能会是调试下载工具吧,因为该开发板没有配自己 ...
<p>仿真器?深圳出品?这也不好肯定说不是它的因素。。。</p>
<div class="quote">
<blockquote><font size="2"><a href="forum.php?mod=redirect&goto=findpost&pid=3001301&ptid=1136448" target="_blank"><font color="#999999">freebsder 发表于 2020-8-12 11:33</font></a></font> 仿真器?深圳出品?这也不好肯定说不是它的因素。。。</blockquote>
</div>
<p>是一款平时用起来还是不错的,不知产地。</p>
<p> </p>
damiaa 发表于 2020-8-12 11:29
楼主字体生成用的哪个工具。有好用的推荐吗?裸跑的时候还是要用。
<p>PCtoLCD2002是比较好用的</p>
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