http://forums.leaflabs.com/topic.php?id=159 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:12:50 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=159&page=2#post-1285 Wed, 15 Sep 2010 08:40:11 +0000 Amir Hadzic 1285@http://forums.leaflabs.com/ <p>Aww, now I can't wait to get home from work :\ (thank you, thank you!) </p> http://forums.leaflabs.com/topic.php?id=159&page=2#post-1282 Tue, 14 Sep 2010 21:09:13 +0000 perry 1282@http://forums.leaflabs.com/ <p>hi amir,</p> <p>i finally had time to look at it and it turned out to be a stupid bug. you can cherry-pick this commit, it should fix it:</p> <p><a href="http://github.com/leaflabs/libmaple/commit/1cec807e44da29c5a122e57120174f4711d95f25" rel="nofollow">http://github.com/leaflabs/libmaple/commit/1cec807e44da29c5a122e57120174f4711d95f25</a> </p> http://forums.leaflabs.com/topic.php?id=159&page=2#post-1262 Tue, 14 Sep 2010 14:59:36 +0000 poslathian 1262@http://forums.leaflabs.com/ <p>were still talking about micros() killing USB right? I have been *told* that this problem is "understood" with a patch on the way. But I wont pretend I know any more details than that. Heh. Sorry. Will keep you posted! </p> http://forums.leaflabs.com/topic.php?id=159&page=2#post-1167 Sat, 11 Sep 2010 10:33:45 +0000 Amir Hadzic 1167@http://forums.leaflabs.com/ <p>Those are all hardware workarounds, I need something that's not expensive, preferably a software workaround. Or at least some predictions when this could be fixed... </p> http://forums.leaflabs.com/topic.php?id=159&page=2#post-1141 Thu, 09 Sep 2010 17:07:06 +0000 gbulmer 1141@http://forums.leaflabs.com/ <p>An alternative, for Arduino owners, which we use ...</p> <p>Remove the USB lead, and power.<br /> GENTLY lever the ATmega from it's socket, and put somewhere safe.<br /> Some Swiss Army knives seem to have a narrow blade which works well for this.<br /> Go slow, and lever a little bit (i.e. no more than 1mm) at both ends, almost like rocking back and forth repeatedly.<br /> BE WARNED, rushing or levering one end too much may crack the chip, and kill it.<br /> Be very gently, and go slow. (No smut please, I'm British :-)</p> <p>The Arduino is now an FTDI USB to serial converter.<br /> Wire as sniglen suggests, but, of course, there is no need to load a sketch :-)</p> <p>PS - Further warning - if you think your Arduino has become sentient (and we think Nikki's 'Evil Ted' may be), then ensure there is *NO* USB or power applied to the Arduino while you are discussing this strategy, or getting ready to do it. Like HAL, 'Evil Ted' does not like to be disabled :-) </p> http://forums.leaflabs.com/topic.php?id=159&page=2#post-1135 Thu, 09 Sep 2010 09:25:28 +0000 leaflabsandy 1135@http://forums.leaflabs.com/ <p>oops </p> http://forums.leaflabs.com/topic.php?id=159&page=2#post-1133 Thu, 09 Sep 2010 09:20:34 +0000 snigelen 1133@http://forums.leaflabs.com/ <p>I just had a crazy idea! If you have an Arduino you can use that as a USB-serial port.<br /> Just put a sketch on the Arduino that doesn't use D0 or D1 (leave them as inputs) or serial communication, an empty sketch will do (empty setup and empty loop) or the "Blink" example.</p> <p>Then, to use usart1 on the maple, connect the Arduino D0 to Maple D8 and Arduino D1 to Maple D7.<br /> But <strong>be careful with the non 5V tolerant pins on the Maple</strong> if you have a 5V Arduino. (So <strong>don't</strong> use it with usart2 on the Maple). Don't forget to remove the connection if you reprogram the Arduino. </p> http://forums.leaflabs.com/topic.php?id=159&page=2#post-1070 Tue, 07 Sep 2010 10:22:30 +0000 Amir Hadzic 1070@http://forums.leaflabs.com/ <p>Oh well, I'll try to come up with something until the bug gets fixed. The real problem with buying the cable or the module (at least for me) is shipping and shipping fees. I have checked my local electronics shops and they don't know what FTDI is so... :\ </p> http://forums.leaflabs.com/topic.php?id=159&page=2#post-1067 Tue, 07 Sep 2010 09:51:06 +0000 snigelen 1067@http://forums.leaflabs.com/ <p>I don't know. The module and the cable are basically the same thing. The cable have the ftdi-chip built into the usb-connector, so it's like an even smaller module in the connector. Maybe that, and the cable itself, adds a couple of dollars. But if you have a serial port and a breadboard you can get away with a max232 and a couple of capacitors. Maybe thats ok, for development at least. </p> http://forums.leaflabs.com/topic.php?id=159&page=2#post-1065 Tue, 07 Sep 2010 09:33:46 +0000 Amir Hadzic 1065@http://forums.leaflabs.com/ <p>Is there some reason why this cable is 17$ :\ </p> http://forums.leaflabs.com/topic.php?id=159&page=2#post-1063 Tue, 07 Sep 2010 09:11:37 +0000 snigelen 1063@http://forums.leaflabs.com/ <p>You only need one of them, cable or module, not both. (With the module you need a standard USB-AB cable tough). </p> http://forums.leaflabs.com/topic.php?id=159#post-1062 Tue, 07 Sep 2010 08:53:10 +0000 Amir Hadzic 1062@http://forums.leaflabs.com/ <p>That's quite an expensive workaround. You can almost buy an maple board for that cable + module. </p> http://forums.leaflabs.com/topic.php?id=159#post-1058 Tue, 07 Sep 2010 04:26:14 +0000 snigelen 1058@http://forums.leaflabs.com/ <p>A workaround is to use one of the hardware USARTS for communication (but then we don't get important bug reports like this). I find it very handy to use a <a href="http://www.sparkfun.com/commerce/product_info.php?products_id=9115">FTDI module</a> or a <a href="http://www.sparkfun.com/commerce/product_info.php?products_id=9717">FTDI-cable</a>. Note that thay come in both 3.3V and 5V versions, so be careful with the 5V variant with USART2 which isn't on 5V tolerant pins. </p> http://forums.leaflabs.com/topic.php?id=159#post-1056 Tue, 07 Sep 2010 04:14:21 +0000 Amir Hadzic 1056@http://forums.leaflabs.com/ <p>Yup, after testing the first example I posted here (the one that uses micros()) the USB stopped working again. I thought that it's my fault (again) so I didn't want to post here :-)</p> <p>Let me know if there is a workaround. Thank you! </p> http://forums.leaflabs.com/topic.php?id=159#post-1051 Mon, 06 Sep 2010 19:24:00 +0000 bnewbold 1051@http://forums.leaflabs.com/ <p>I think your above problems may be due to a recently discovered bug where micros() kills USB... I think this is due to the new micros() toggling the global interrupt flag (which we haven't tested much yet), but we'll have to have perry look at it. </p>