jinglixixi 发表于 2020-8-10 17:09

【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:&quot;微软雅黑&quot;,&quot;sans-serif&quot;"><span style="color:#444444"><span style="letter-spacing:.4pt">4. </span></span></span><span style="font-family:&quot;微软雅黑&quot;,&quot;sans-serif&quot;"><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">&nbsp;</p>

<p style="text-align:justify"></p>

<p style="text-align:justify">&nbsp;</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">&nbsp; u32 xid = 0;</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp; u32 ImgAdds = 0;</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp; u32 yid = 0;</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp; 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">&nbsp; xid = X_Location;</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp; yid = Y_Location;</span></span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp; LCD_StarterSet(xid, yid);</span></span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp; for (i = 0; i &lt; Height; i++)&nbsp;&nbsp; &nbsp;// &lt;240</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp; {</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp;&nbsp;&nbsp; LCD_WriteRAMPrior();&nbsp; </span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp;&nbsp;&nbsp; for (j = 0; j &lt; Width; j++)&nbsp; // &lt;320</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp;&nbsp;&nbsp; {</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 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">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; color = Pptr &lt;&lt; 8 | (Pptr);</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; LCD_WriteRAM(color);</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp;&nbsp;&nbsp; }</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp;&nbsp; &nbsp; xid++;</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp;&nbsp;&nbsp; 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">&nbsp; }</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">&nbsp;</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>&nbsp;&nbsp; </span></span></p>

<p style="text-align:justify">&nbsp;</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">&nbsp;</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">&nbsp; LCD_Init();</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp; LCD_Config();</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp; LCD_Clear(0x2c5c); </span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp; LCD_BackColorSet(0x2c5c);</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp; LCD_TextColorSet(Yellow);</span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp; LCD_CharDisplayA(Line1, 70, 0);&nbsp; </span></span></p>

<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">&nbsp; 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">&nbsp; 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">&nbsp; 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">&nbsp; 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">&nbsp; 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">&nbsp; 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">&nbsp;</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">&nbsp;</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:&quot;Calibri&quot;,&quot;sans-serif&quot;">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>

freebsder 发表于 2020-8-10 18:52

<p>是不是下载参数没配对,比实际flash大小设大了</p>

宋元浩 发表于 2020-8-10 20:22

<p>下载失败的时候,Bulid output窗口还提示什么</p>

jinglixixi 发表于 2020-8-11 08:50

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>

jinglixixi 发表于 2020-8-11 08:52

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>

freebsder 发表于 2020-8-11 20:54

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 2020-8-11 22:50

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>

jinglixixi 发表于 2020-8-12 10:02

<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>

jinglixixi 发表于 2020-8-12 10:06

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>

damiaa 发表于 2020-8-12 11:29

<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>

freebsder 发表于 2020-8-12 11:33

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>

jinglixixi 发表于 2020-8-12 16:19

<div class="quote">
<blockquote><font size="2"><a href="forum.php?mod=redirect&amp;goto=findpost&amp;pid=3001301&amp;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>&nbsp;</p>

jinglixixi 发表于 2020-8-12 16:22

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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