[原创]关于13IN1的内置USB使用

u235u238

刚收到机器不久，发现板子上有内置的USB接口<div>于是发扬DIY精神，不能浪费任何功能</div><div>详细报道见下文~~~</div><div><p class="MsoNormal" align="left" style="line-height: 18.75pt;"><span style="background-color: rgb(255, 255, 255);"><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">USB</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">的</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">DM</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">、</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">DP</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">的上拉电阻分析</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);"><op></op></span></span></p>
                <p class="MsoNormal" align="left" style="line-height: 18.75pt;"><span style="background-color: rgb(255, 255, 255);"><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">usb</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">有主从设备之分，主设备有：</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">pc, </span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">现在市面上的那些插</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">u-disk</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">即可播放</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">mp3</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">的</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">“mp3”</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">之类的，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);"><op></op></span></span></p>
                <p class="MsoNormal" align="left" style="line-height: 18.75pt;"><span style="background-color: rgb(255, 255, 255);"><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">usb </span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">信号是差分信号，信号线为</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">D+, D-,</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">。</span><span style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">
                                </span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">在</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">usb host </span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">端，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);"> D+</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">D- </span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">各接一个</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">15kohm </span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">的下拉电阻，</span><span style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">
                                </span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">而在</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">usb device</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">端，这时就有高速低速设备的区别了。</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">usb1.0, 1.1,2.0</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">协议中都有定义高低速设备以满足不同情况的需求，这些在硬件上的区别就是：高速设备：</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">d+ </span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">接一个</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">1.5kohm</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">的上拉电阻，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">d-</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">不接；低速设备则相反。</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);"><op></op></span></span></p>
                <p class="MsoNormal" align="left" style="line-height: 18.75pt;"><span style="background-color: rgb(255, 255, 255);"><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">这样当</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">usb device </span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">插入到</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">host</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">中时，如果是高速设备，</span><span style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">
                                </span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">则</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">d+</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">被拉高，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">d-</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">不变；低速设备则与之相反。这个上拉过程需要大概</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">2.5us</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">的时间，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">host</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">这这个时间内便检测到了该信号，即可判断有</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">device plug in</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">，和该</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">device</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">的类型，然后开始通讯，枚举。。。等。</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);"><op></op></span></span></p>
                <p class="MsoNormal" align="left" style="line-height: 18.75pt;"><span style="background-color: rgb(255, 255, 255);"><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">USB OTG</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">（</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">on the go</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">）</span><span style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">
                                </span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">就是既可以做</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">host</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">又可以做</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">client<op></op></span></span></p>
                <p class="MsoNormal" align="left" style="line-height: 18.75pt;"><span style="background-color: rgb(255, 255, 255);"><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">我们一般是作为</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">client</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">接受</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">pc</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">传输数据，作为</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">host</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">时可以接打印机直接把手机中的照片打印出来</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);"><op></op></span></span></p>
                <p class="MsoNormal" align="left" style="line-height: 18.75pt;"><span style="background-color: rgb(255, 255, 255);"><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">判别是</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">host</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">还是</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">client</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">是靠</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">USB_ID</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">这根</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">pin<op></op></span></span></p>
                <p class="MsoNormal" align="left" style="line-height: 18.75pt;"><span style="background-color: rgb(255, 255, 255);"><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">当作为</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">client</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">时，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">USB_ID</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">基本是悬空的（内部有上拉）</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);"><op></op></span></span></p>
                <p class="MsoNormal" align="left" style="line-height: 18.75pt;"><span style="background-color: rgb(255, 255, 255);"><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">如果侦测到</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">USB_ID</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">被拉低，就被认为是作为</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">host</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">，向外输出</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);"><op></op></span></span></p>
                <p class="MsoNormal" align="left" style="line-height: 18.75pt;"><span style="background-color: rgb(255, 255, 255);"><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">所以需要外部</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">client</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">设备把</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">USB_ID</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">拉低</span></span><span lang="EN-US" style="background-color: rgb(204, 206, 208); font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);"><op></op></span></p></div>

awing2012

主要干嘛用，楼主

u235u238

<div class="msgheader">QUOTE:</div><div class="msgborder"><b>以下是引用<i>awing2012</i>在2012-12-8 17:43:27的发言：</b><br/>主要干嘛用，楼主</div><div class="msgheader">QUOTE:</div><div class="msgborder">有硬盘座的同学就不用每次插拔U盘或移动硬盘了~~~</div><p></p>

DIYTY

<p><font size="5" face="宋体">这个论坛里有资料，有玩家分享过。 如果接3.5硬盘需要另接电源供电。</font><br/><br/><a href="http://www.diyty.com.cn/dispbbs.asp?boardID=12&amp;ID=4572&amp;page=2">http://www.diyty.com.cn/dispbbs.asp?boardID=12&amp;ID=4572&amp;page=2</a></p>

u235u238

<p class="MsoNormal" align="left" style="line-height: 18.75pt;"><span style="background-color: rgb(255, 255, 255);"><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">USB</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">上的：</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">VCC</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">dp</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">dm</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">GND;</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">和</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);"> USB</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">上的：</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">VCC</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">ORT-</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">ORT+</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">GND</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">分别指的是什么意思有什么关联吗？</span><span style="color: rgb(59, 59, 59); font-family: Arial, sans-serif; font-size: 10.5pt; line-height: 18.75pt;">&#160;</span></span></p>
        <p class="MsoNormal" align="left" style="line-height: 18.75pt;"><span style="background-color: rgb(255, 255, 255);"><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">VCC</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">是电源接入、</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">GND</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">为接地，</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">DP</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">、</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">DM</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">是差分信号；</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">ORT-</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">、</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">ORT+</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">是数据负、正信号。</span><span style="color: rgb(59, 59, 59); font-family: Arial, sans-serif; font-size: 10.5pt; line-height: 18.75pt;">&#160;</span></span></p>
        <p class="MsoNormal" align="left" style="line-height: 18.75pt;"><span style="background-color: rgb(255, 255, 255);"><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">USB</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">里面的</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">DP</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">等同</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">ORT+</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">；</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">DM</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">就等同</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">ORT-,</span><span style="color: rgb(59, 59, 59); font-family: Arial, sans-serif; font-size: 10.5pt; line-height: 18.75pt;">&#160;</span></span></p>
        <span style="background-color: rgb(255, 255, 255);"><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">USB</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">接口信号</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">,</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">即是</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">DP</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">与</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">DM</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">信号</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">,</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">分别对应于</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">D+</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">与</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">D-</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">信号</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">(</span><span style="font-size: 10.5pt; font-family: 宋体; color: rgb(59, 59, 59);">如下图</span><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);">)</span></span><div><span style="background-color: rgb(255, 255, 255);"><span lang="EN-US" style="font-size: 10.5pt; font-family: Arial, sans-serif; color: rgb(59, 59, 59);"><br/></span></span></div><br/>

u235u238

这是板子上的插座定义<div><br/></div><div><br/></div><div><br/></div><div>实际接线的时候只用4个就ok那个i/o不用操理</div><div><br/></div><br/>

u235u238

当然杜邦线不能直接裸露这<div>必须得热缩管保护起来</div><div><br/></div><br/><div><br/></div><div>专门买了个两边有口的HUB做集线器</div><div><br/></div><br/>

u235u238

虽然现在能用的只有俩USB口但是其中一路咱是不是能用来接硬盘了？？？<div>硬盘座这种东西可都是USB2.0的哦！！！</div><div>大家明白了么？？？</div>[em05]