物联创客 发表于 2021-11-11 14:27

【拓普微智能显示屏测评】1.屏幕接口介绍及上电功耗测试和串口通信测试

<div class='showpostmsg'> 本帖最后由 物联创客 于 2021-11-11 14:42 编辑

<p style="text-indent:21.0000pt; text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">&nbsp; &nbsp;有幸通过</font>&ldquo;拓普微智能显示模块</span></span><span style="font-size:10.5000pt"><span style="font-family:Calibri">HMT070ETD-1D</span></span><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">&rdquo;的测评申请,前些时日出于工作繁忙,搁置了测评,现针对此智能显示模块做功耗及接口说明,并对其部分接口做初步通信测试。</font></span></span></span></span></p>

<p style="text-indent:21.0000pt; text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">下图中标注了显示屏模块背面主要接口:</font></span></span></span></span></p>

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<p style="text-indent:21.0000pt; text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">根据模块产品手册介绍,用于用户开发的接口有</font></span></span><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">K8</font><font face="宋体">、</font><font face="Calibri">K1 </font><font face="宋体">两个同功能的</font><font face="Calibri">232</font><font face="宋体">串口,一个</font><font face="Calibri">miniUSB</font><font face="宋体">口用于加载图片界面素材,一个</font><font face="Calibri">J1</font><font face="宋体">网口用于远程升级,其接口介绍如图:</font></span></span></span></span></p>

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<p style="text-indent:21.0000pt; text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">注意:</font><font face="Calibri">K1</font><font face="宋体">接口没有焊接,我们使用</font><font face="Calibri">K8</font><font face="宋体">接口,其接口型号为</font><font face="Calibri">XH2.54mm-8P-JST</font><font face="宋体">,这里</font><font face="Calibri">JST</font><font face="宋体">代表接口带锁扣,手头没有现成的线,采用了</font><font face="Calibri">xh2.54mm-8p</font><font face="宋体">的线代替也可以使用。</font></span></span></span></span></p>

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<p style="text-indent:21.0000pt; text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">从接口说明中可看了解到,屏幕供电电压范围为</font><font face="Calibri">11-26V</font><font face="宋体">,那么采用</font><font face="Calibri">12V</font><font face="宋体">电源给屏幕上电看下电流情况(</font><font face="Calibri">12V</font><font face="宋体">,</font><font face="Calibri">0.27A</font><font face="宋体">,约</font><font face="Calibri">3.3W</font><font face="宋体">),和手册说明一致:</font></span></span></span></span></p>

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<p style="text-indent:21.0000pt; text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">采用</font><font face="Calibri">usb</font><font face="宋体">转</font><font face="Calibri">232</font><font face="宋体">串口模块与屏幕进行通信测试,打开电脑串口调试助手,对照手册,串口波特率设置为</font><font face="Calibri">115200</font><font face="宋体">,无校验,</font><font face="Calibri">8</font><font face="宋体">位数据,</font><font face="Calibri">1</font><font face="宋体">位停止位。</font></span></span></span></span></p>

<p style="text-indent:21.0000pt; text-align:justify">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</p>

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<p style="text-indent:21.0000pt; text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">向屏幕发送指令(查询屏幕固件版本):</font></span></span></span></span></p>

<p style="text-indent:21.0000pt; text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="Calibri">aa 31 cc 33 c3 3c </font></span></span></span></span></p>

<p style="text-indent:21.0000pt; text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">屏幕返回:</font></span></span></span></span></p>

<p style="text-indent:21.0000pt; text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:Calibri">AA 31 36 2E 32 35 00 CC 33 C3 3C 3A 3E 54 4F 50 57 41 59 </span></span></span></span></p>

<p style="text-indent:21.0000pt; text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">版本号为:</font><font face="Calibri">36 2e 32 35 00 &nbsp;&nbsp;</font><font face="宋体">即</font><font face="Calibri">6.25</font></span></span></span></span></p>

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<p style="text-indent:21.0000pt; text-align:justify">&nbsp;<span style="font-size:10.5pt"><span style="font-family:Calibri"><span style="font-size:10.5000pt"><span style="font-family:宋体"><font face="宋体">好的,第一篇就介绍到这里。</font></span></span></span></span></p>

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soso 发表于 2021-11-12 09:32

<p>期待后续哈</p>
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