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		<title>LeafLabs Garden &#187; Topic: New Maple ... SerialUSB print problem</title>
		<link>http://forums.leaflabs.com/topic.php?id=71</link>
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		<pubDate>Fri, 22 Jan 2016 00:12:40 +0000</pubDate>
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		<item>
			<title>gsentlin on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=3#post-22070</link>
			<pubDate>Tue, 22 Jan 2013 10:30:40 +0000</pubDate>
			<dc:creator>gsentlin</dc:creator>
			<guid isPermaLink="false">22070@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;Hello, I have a similar problem and I'm wondering if anyone does, and if there is a way to fix it.  I have an Olimex STM32 board.  When I reset the board, the IDE loses the serial port it was working on and I get the error &#34;Serial port &#34;COM13&#34; not found.  Did you select the right one from the...&#34;.  I then have to do all sorts of things to get the board and the PC talking again.  If I leave an external supply on the board, and unplug and plug the USB cable, and reset the IDE, I can get COM13 back up and running.  Maybe this is just an Olimex issue, in which case I'll take it to their forum.  I saw one other post that said the serial port was buggy, which might refer to this same problem.  Any suggestions?  It's making working with this platform incredibly painful.&#60;/p&#62;
&#60;p&#62;BTW, I'm running IDE v0.0.12 on XP SP2&#60;/p&#62;
&#60;p&#62;Thanks.
&#60;/p&#62;</description>
		</item>
		<item>
			<title>hans leuthold on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=3#post-11385</link>
			<pubDate>Tue, 26 Jun 2012 15:48:40 +0000</pubDate>
			<dc:creator>hans leuthold</dc:creator>
			<guid isPermaLink="false">11385@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;thanks for your answer - I went through my directories and verified - then uninstalled the drivers and went one more time through the installation as described in the user guide - the result is still the same &#60;/p&#62;
&#60;p&#62;quoting the user guide:&#60;br /&#62;
&#38;lt;&#38;lt;&#38;lt;&#38;lt;&#38;lt;&#38;lt;&#38;lt;&#38;lt;&#60;br /&#62;
First, install DFU drivers (for uploading code to your Maple) using the following steps.&#60;/p&#62;
&#60;p&#62;    Plug your Maple into the USB port.&#60;br /&#62;
    Hit the reset button on your Maple (it’s the small button at the bottom left, labeled RESET). Notice that it blinks quickly 6 times, then blinks slowly a few more times.&#60;br /&#62;
    Hit reset again, and this time push and hold the other button during the 6 fast blinks (the button is on the top right; it is labeled BUT). You can release it once the slow blinks start.&#60;br /&#62;
    Your Maple is now in perpetual bootloader mode. This should give you a chance to install the DFU drivers.&#60;br /&#62;
    Windows should now prompt you for some drivers. In the top level directory of the Maple IDE, point Windows to drivers/mapleDrv/dfu/.&#60;/p&#62;
&#60;p&#62;Next, install serial drivers (for communicating with your Maple using serial over USB).&#60;/p&#62;
&#60;p&#62;    Reset your Maple and allow it to exit the bootloader (wait for the slow blinking to stop). The Maple will next start running whatever program was uploaded to it last. (New Maples will start running the test program we upload to them before shipping them to you).&#60;br /&#62;
    Once Maple is running some user code, Windows should prompt you for more drivers. Point windows to driver/mapleDrv/serial.&#60;/p&#62;
&#60;p&#62;You can now run the Maple IDE by double-clicking on the maple-ide program from within the extracted IDE directory.&#60;br /&#62;
&#38;gt;&#38;gt;&#38;gt;&#38;gt;&#38;gt;&#38;gt;&#38;gt;&#38;gt;&#60;br /&#62;
end of quote - all of this seems to work just fine - but I still do not get any functional serial port - the only port shown in IDE&#38;gt;Tools&#38;gt;SerialPort is COM3 which is checked&#60;/p&#62;
&#60;p&#62;driver/mapleDrv/serial contains 4 files:&#60;br /&#62;
maple_serial.inf&#60;br /&#62;
msports.dll&#60;br /&#62;
serenum.sys&#60;br /&#62;
usbser.sys&#60;/p&#62;
&#60;p&#62;when poked by the device driver window, I point the directory to drivers/mapleDrv/serial and assume that it would pick the appropriate files&#60;/p&#62;
&#60;p&#62;I dump maple_serial.inf below&#60;br /&#62;
&#38;lt;&#38;lt;&#38;lt;&#38;lt;&#38;lt;&#38;lt;&#38;lt;&#38;lt;&#60;br /&#62;
;&#60;br /&#62;
; STMicroelectronics Comunication Device Class driver instalation file&#60;br /&#62;
; (C)2006 Copyright STMicroelectronics&#60;br /&#62;
; &#60;/p&#62;
&#60;p&#62;[Version]&#60;br /&#62;
Signature=&#34;$Windows NT$&#34;&#60;br /&#62;
Class=Ports&#60;br /&#62;
ClassGuid={4D36E978-E325-11CE-BFC1-08002BE10318}&#60;br /&#62;
Provider=%STM%&#60;br /&#62;
LayoutFile=layout.inf&#60;/p&#62;
&#60;p&#62;[Manufacturer]&#60;br /&#62;
%MFGNAME%=VirComDevice,NT,NTamd64&#60;/p&#62;
&#60;p&#62;[DestinationDirs]&#60;br /&#62;
DefaultDestDir = 12&#60;/p&#62;
&#60;p&#62;[VirComDevice.NT]&#60;br /&#62;
%DESCRIPTION%=DriverInstall,USB\VID_1EAF&#38;amp;PID_0004&#60;br /&#62;
%DESCRIPTION%=DriverInstall,USB\VID_1EAF&#38;amp;PID_0004&#60;/p&#62;
&#60;p&#62;[VirComDevice.NTamd64]&#60;br /&#62;
%DESCRIPTION%=DriverInstall,USB\VID_1EAF&#38;amp;PID_0004&#60;br /&#62;
%DESCRIPTION%=DriverInstall,USB\VID_1EAF&#38;amp;PID_0004&#60;/p&#62;
&#60;p&#62;[DriverInstall.NT]&#60;br /&#62;
Include=mdmcpq.inf&#60;br /&#62;
CopyFiles=FakeModemCopyFileSection&#60;br /&#62;
AddReg=DriverInstall.NT.AddReg&#60;/p&#62;
&#60;p&#62;[DriverInstall.NT.AddReg]&#60;br /&#62;
HKR,,DevLoader,,*ntkern&#60;br /&#62;
HKR,,NTMPDriver,,usbser.sys&#60;br /&#62;
HKR,,EnumPropPages32,,&#34;MsPorts.dll,SerialPortPropPageProvider&#34;&#60;/p&#62;
&#60;p&#62;[DriverInstall.NT.Services]&#60;br /&#62;
AddService=usbser, 0x00000002, DriverServiceInst&#60;/p&#62;
&#60;p&#62;[DriverServiceInst]&#60;br /&#62;
DisplayName=%SERVICE%&#60;br /&#62;
ServiceType=1&#60;br /&#62;
StartType=3&#60;br /&#62;
ErrorControl=1&#60;br /&#62;
ServiceBinary=%12%\usbser.sys &#60;/p&#62;
&#60;p&#62;;------------------------------------------------------------------------------&#60;br /&#62;
;  String Definitions&#60;br /&#62;
;------------------------------------------------------------------------------&#60;/p&#62;
&#60;p&#62;[Strings]&#60;br /&#62;
STM         = &#34;LeafLabs&#34;&#60;br /&#62;
MFGNAME     = &#34;LeafLabs&#34;&#60;br /&#62;
DESCRIPTION = &#34;Maple R3&#34;&#60;br /&#62;
SERVICE     = &#34;USB Virtual COM port&#34;&#60;br /&#62;
&#38;gt;&#38;gt;&#38;gt;&#38;gt;&#38;gt;&#38;gt;&#38;gt;&#38;gt;&#60;br /&#62;
end of dump&#60;/p&#62;
&#60;p&#62;the device manager shows &#34;libusb-win32 devices&#34; as &#34;Maple R3&#34; which is the description given in the file maple_serial.inf - based on this I assume that the inf file was read but that one of the parameters in it is wrong for Windows XP SP3&#60;/p&#62;
&#60;p&#62;I hope I don't annoy you guys with my ignorance in pc-medicine&#60;/p&#62;
&#60;p&#62;thanks&#60;br /&#62;
Hans
&#60;/p&#62;</description>
		</item>
		<item>
			<title>crenn on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=2#post-11382</link>
			<pubDate>Tue, 26 Jun 2012 05:34:11 +0000</pubDate>
			<dc:creator>crenn</dc:creator>
			<guid isPermaLink="false">11382@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;According to Windows XP, the drivers for the com port is:&#60;/p&#62;
&#60;blockquote&#62;&#60;p&#62;&#60;code&#62;C:\Windows\system32\Drivers\usbser.sys&#60;/code&#62;&#60;/p&#62;&#60;/blockquote&#62;
&#60;p&#62;What you've listed is for the DFU mode.&#60;/p&#62;
&#60;p&#62;I'd recommend using an external program such as Putty to view the serial output of the Maple. Also ensure that you've selected the correct device and serial port in the Tools menu.
&#60;/p&#62;</description>
		</item>
		<item>
			<title>hans leuthold on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=2#post-11375</link>
			<pubDate>Mon, 25 Jun 2012 16:07:38 +0000</pubDate>
			<dc:creator>hans leuthold</dc:creator>
			<guid isPermaLink="false">11375@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;I got a new Maple r5 and try to get acquainted....&#60;br /&#62;
in the process I seem to repeat all the errors anybody else ever has posted in this forum about - so reading the posts is very helpful&#60;/p&#62;
&#60;p&#62;HOWEVER - I seem to have hit a snag trying to check the usb / serial port&#60;/p&#62;
&#60;p&#62;on a lenovo T60 with Windows XP, service pack 3&#60;br /&#62;
Maple R3 shows in the device driver list&#60;br /&#62;
and I have reloaded them following the instructions&#60;br /&#62;
driver details show as&#60;br /&#62;
c:\windows\system32\drivers\libusb0.sys&#60;br /&#62;
c:\windows\system32\libusb0.dll&#60;/p&#62;
&#60;p&#62;at this point I am certain that the serial link does not do its job because:&#60;br /&#62;
&#38;gt; if I let the IDE &#34;resetting to bootloader via DTR pulse&#34; etc - the feedback ends with&#60;br /&#62;
&#34;Couldn't find the DFU device: [lEAF:0003]&#60;br /&#62;
&#38;gt; if I set to bootloader using RESET &#38;amp; BUT, the sketch loads perfectly&#60;/p&#62;
&#60;p&#62;the sketch I run is a modified blink&#60;/p&#62;
&#60;p&#62;void setup() {&#60;br /&#62;
    pinMode(BOARD_LED_PIN, OUTPUT);&#60;br /&#62;
}&#60;/p&#62;
&#60;p&#62;void loop() {&#60;br /&#62;
    toggleLED();&#60;br /&#62;
    delay(200);&#60;br /&#62;
    toggleLED();&#60;br /&#62;
    delay(200);&#60;br /&#62;
    toggleLED();&#60;br /&#62;
    delay(1000);&#60;br /&#62;
}&#60;/p&#62;
&#60;p&#62;I open Examples&#38;gt;Communication&#38;gt;ASCIITable which loads under the same constraints than the modified blink - but does not serve the Serial Monitor at all&#60;/p&#62;
&#60;p&#62;I am pretty certain that to most of you I must have made a really trivial error and need some help&#60;/p&#62;
&#60;p&#62;thanks&#60;br /&#62;
Hans
&#60;/p&#62;</description>
		</item>
		<item>
			<title>poslathian on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=2#post-687</link>
			<pubDate>Thu, 05 Aug 2010 23:28:23 +0000</pubDate>
			<dc:creator>poslathian</dc:creator>
			<guid isPermaLink="false">687@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;ok, I will! (note: disregard this post. I only posted it so that I could clear out the open thread....we like to have leaflabs people have the last say in the threads so we can make sure everyone questions have been answered!)
&#60;/p&#62;</description>
		</item>
		<item>
			<title>Nate on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=2#post-685</link>
			<pubDate>Thu, 05 Aug 2010 20:17:51 +0000</pubDate>
			<dc:creator>Nate</dc:creator>
			<guid isPermaLink="false">685@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;disregard this post.
&#60;/p&#62;</description>
		</item>
		<item>
			<title>bnewbold on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=2#post-665</link>
			<pubDate>Tue, 03 Aug 2010 00:33:43 +0000</pubDate>
			<dc:creator>bnewbold</dc:creator>
			<guid isPermaLink="false">665@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;As follow up, these SerialUSB and external power woes should have been fixed (or at least &#34;worked-arounded&#34;) in the IDE version 0.0.6. If you are still having critical problems or identical symptoms please let us know. We intend to implement additional buffering for faster throughput and more fine grained timeout and blocking behavioral codes to the SerialUSB object in the future.
&#60;/p&#62;</description>
		</item>
		<item>
			<title>leaflabsandy on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=2#post-450</link>
			<pubDate>Fri, 02 Jul 2010 06:22:29 +0000</pubDate>
			<dc:creator>leaflabsandy</dc:creator>
			<guid isPermaLink="false">450@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;Not to confuse the other board members... but could someone move this sub topic to &#34;Maple power jumper confusion&#34; topic? &#60;/p&#62;
&#60;p&#62;(Cut and paste from the point &#34;see below&#34; to the end.) &#60;/p&#62;
&#60;p&#62;These short paragraphs has nothing to do with the main topic of SerialUSB print problem.
&#60;/p&#62;</description>
		</item>
		<item>
			<title>leaflabsandy on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=2#post-449</link>
			<pubDate>Fri, 02 Jul 2010 04:30:19 +0000</pubDate>
			<dc:creator>leaflabsandy</dc:creator>
			<guid isPermaLink="false">449@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;There are serveral sources of power for the Maple:&#60;br /&#62;
	1. USB connector&#60;br /&#62;
        2. Lithium battery&#60;br /&#62;
        3. Power from Barrel Jack&#60;br /&#62;
        4. Power from two pads under the barrel jack - not marked&#60;br /&#62;
        5. Power from Vin short 6 pin connector. (special alt. method)&#60;/p&#62;
&#60;p&#62;From day one, &#34;MY&#34; Maple ran on USB power but did not run on external&#60;br /&#62;
power. To be more specific, power was there but the ARM did not run&#60;br /&#62;
the flash program. The reset switch did not force the ARM to run&#60;br /&#62;
from its halted state.  &#60;/p&#62;
&#60;p&#62;I tried, first, a Lithium cell (from sparkfun) to power the Maple.&#60;br /&#62;
Then I tried to power the unit with a bench power supply and then a&#60;br /&#62;
9 vdc power supply (regulated). In all cases, I only used one jumper.&#60;/p&#62;
&#60;p&#62;If the Maple ran on USB power but did not run on external power&#60;br /&#62;
there are only two things different, one is the reset and two is&#60;br /&#62;
the USB components. Only out of desperation, did I backfeed the&#60;br /&#62;
Maple and made sure that I did not exceed any supply and logic levels.&#60;/p&#62;
&#60;p&#62;The answer to your question, is the diode burnt out near the&#60;br /&#62;
barrel connector? - no it is not. The power always worked from&#60;br /&#62;
the barrel connector with no problems except the Maple did not&#60;br /&#62;
run from external power! This diode protects from reverse polarity and&#60;br /&#62;
at no time reversed power was never applied to the Maple by me.&#60;br /&#62;
Further inspection of this diode ... I can still see the N3 lettering and the&#60;br /&#62;
cathode lines on the diode.&#60;/p&#62;
&#60;p&#62;I can send you back this Maple so you can further inspect why it does not work&#60;br /&#62;
on external power? Just let me know. &#38;lt;----- ?????????&#60;/p&#62;
&#60;p&#62;My theory is the software looks through the 1.5K resistor divider network at the&#60;br /&#62;
bit USB_P and sees that it is a logic 1 or high. When the USB power is removed the&#60;br /&#62;
logic level is a low or pulled down. That is why it doesn't run on ext. power?&#60;br /&#62;
By &#34;backfeeding&#34; the USB logic, this bit allows the Maple to run? Of course, there&#60;br /&#62;
is other USB logic components that could cause this problem?&#60;br /&#62;
In the end, I still think it software problem which will be resolved in due time?
&#60;/p&#62;</description>
		</item>
		<item>
			<title>okie on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=2#post-448</link>
			<pubDate>Fri, 02 Jul 2010 03:05:18 +0000</pubDate>
			<dc:creator>okie</dc:creator>
			<guid isPermaLink="false">448@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;leaflabsandy, I was unable to reproduce your problem with Maple using an external power supply....it worked for me. Is it possible that you burned out the protection diode next to the barrel jack? I could have happened if you plugged in two jumpers at the same time. If so, you can probably tell by looking at it. If you can't see markings on the top, then it's burned out. If it's burned out, you can short it with a wire to make things working with external power or replace it to keep protection.
&#60;/p&#62;</description>
		</item>
		<item>
			<title>leaflabsandy on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=2#post-445</link>
			<pubDate>Thu, 01 Jul 2010 20:10:54 +0000</pubDate>
			<dc:creator>leaflabsandy</dc:creator>
			<guid isPermaLink="false">445@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;Quote: &#34;If there is confusion over headers, which does cause a pin to be pulled beyond specified voltage, maybe a resistor component value change might be sufficient to neutralise probable effects?&#34;&#60;/p&#62;
&#60;p&#62;Really there is no confusion on the power select header ---&#38;gt; only ONE jumper is allowed&#60;br /&#62;
to be inserted at one time! &#38;lt;------- &#60;/p&#62;
&#60;p&#62;What I did, is to fool the software into thinking it was still connected to the USB instead of an external power supply. The problem was that the Maple did not work or reset when using the external power supply. This problem will/should be resolved by new software for the  Windows XP SP3 platform.
&#60;/p&#62;</description>
		</item>
		<item>
			<title>gbulmer on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=2#post-430</link>
			<pubDate>Thu, 01 Jul 2010 02:44:50 +0000</pubDate>
			<dc:creator>gbulmer</dc:creator>
			<guid isPermaLink="false">430@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;Accepting that there is still some analysis to be done ...&#60;/p&#62;
&#60;p&#62;If there is confusion over headers, which does cause a pin to be pulled beyond specified voltage, maybe a resistor component value change might be sufficient to neutralise probable effects?&#60;/p&#62;
&#60;p&#62;I use Arduino's with school children to make robots and stuff in after school technology clubs. In our enthusiasm, we sometimes plug more than one power source in, and fumble with the jumper. So far we have only used 9V batteries to power things, so it sounds like we wouldn't have a problem (but I'll read the schematic and have a ponder). One of the students is now interested in LiPo batteries, which are over 12V fully charged, and I know that some folks use NiCad or NiMH RC car batteries which are 14.4V. If the issue is restricted to one input pin, maybe adjust the voltage divider to accept 15V?&#60;/p&#62;
&#60;p&#62;I haven't thought this through, but it just occurred to me that adjusting the neighbouring headers so that are NOT on a 0.1&#34; pitch might be helpful. That would increase the manufacturing costs, and consume board 'real estate' but might reduce one dimension of possible problems. Again I need to have a ponder, but I thought I'd throw out out there as I am out all day.
&#60;/p&#62;</description>
		</item>
		<item>
			<title>bnewbold on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=2#post-422</link>
			<pubDate>Wed, 30 Jun 2010 02:36:47 +0000</pubDate>
			<dc:creator>bnewbold</dc:creator>
			<guid isPermaLink="false">422@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;To clarify, the Maple &#60;strong&#62;is&#60;/strong&#62; designed to be powered from &#60;strong&#62;one&#60;/strong&#62; power source, with full functionality, and there should never be any reason to connect multiple power jumpers (not including the battery &#60;em&#62;charging&#60;/em&#62; jumper). We tested USB and Serial communications with power coming to the Maple from a battery, USB, the barrel jack, and directly to Vin and did not have any problems. &#60;/p&#62;
&#60;p&#62;We're debugging leaflabsandy's troubles and it's most likely our fault from a libmaple bug or a fabrication error. If anybody else has the same symptoms we'd definitely like to hear about it. &#60;/p&#62;
&#60;p&#62;Obviously you can do what you want with your hardware, but we really recommend not connecting more than one power header!
&#60;/p&#62;</description>
		</item>
		<item>
			<title>leaflabsandy on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=2#post-392</link>
			<pubDate>Mon, 28 Jun 2010 06:41:41 +0000</pubDate>
			<dc:creator>leaflabsandy</dc:creator>
			<guid isPermaLink="false">392@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;Danger ... folks at home do not apply more than 10 volts to the Maple and insert the USB jumper!!!! The 1.5K voltage divider would be more than 5 vdc which would put the input pin at its max voltage! This problem is looking more like a software problem?&#60;br /&#62;
Wait for Maple to resolve this problem?
&#60;/p&#62;</description>
		</item>
		<item>
			<title>leaflabsandy on "New Maple ... SerialUSB print problem"</title>
			<link>http://forums.leaflabs.com/topic.php?id=71&amp;page=2#post-387</link>
			<pubDate>Sun, 27 Jun 2010 16:44:17 +0000</pubDate>
			<dc:creator>leaflabsandy</dc:creator>
			<guid isPermaLink="false">387@http://forums.leaflabs.com/</guid>
			<description>&#60;p&#62;Found the problem: &#34;Both&#34; the &#34;USB&#34; AND &#34;External&#34; power jumpers have to be installed for the board to work on an external power supply !!!!&#60;/p&#62;
&#60;p&#62;Quote: &#34;The Maple can be powered from a USB host, a battery, the barrel jack, or voltage applied directly to a header (Vin). The power source is selected with &#34;a jumper.&#34; &#38;lt;--- ? &#34;a&#34; means  = 1&#60;/p&#62;
&#60;p&#62;You need TWO JUMPERS INSTALLED TO MAKE IT WORK WITH EXTERNAL POWER!!!!&#60;br /&#62;
You need to &#34;backfeed&#34; the USB components for the Maple to work on external power?&#60;/p&#62;
&#60;p&#62;This negates the protection of the board - powering both the USB with another source might ruin the Maple?&#60;/p&#62;
&#60;p&#62;That is why there should &#34;A&#34; jumper to select ONLY one source at a time??? &#60;/p&#62;
&#60;p&#62;A user friendly power jumper table by Leaflabs should be constructed&#60;br /&#62;
with explicit instructions!!!
&#60;/p&#62;</description>
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