http://forums.leaflabs.com/topic.php?id=833 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:18:24 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=833#post-12749 Tue, 21 Aug 2012 03:14:24 +0000 Anonymous 12749@http://forums.leaflabs.com/ <p>I think that it is safe to disregard my comment. My apology for the thread necromancy. After building my circuit on the new prototyping board, I have been unable to reproduce the problem. I suspect that I was getting noise on my data lines. </p> http://forums.leaflabs.com/topic.php?id=833#post-12701 Sun, 19 Aug 2012 21:01:28 +0000 Anonymous 12701@http://forums.leaflabs.com/ <p>Unsure if this is related, however on a Maple r5, I run into problems using a 20x2 VFD when using 4-bit mode with the following:</p> <p>RS: 23<br /> E: 24<br /> D4-D7: 25,26,27,28</p> <p>The display runs quite nicely for a while, then after about 15 minutes or so, I start getting gibberish on the display. If I move from using pins 23-28 and instead use 25-30, the problem manifests itself within about 10 seconds. The display runs forever without incident off of an Arduino so I am certain that it is not defective. I am perplexed as to the behavior just by switching pins, but I suspect that there may be a peripheral or option that I need to disable in order to rectify this condition. </p> http://forums.leaflabs.com/topic.php?id=833#post-6587 Sun, 25 Sep 2011 08:32:38 +0000 kalund 6587@http://forums.leaflabs.com/ <p>Hi,</p> <p>I've just made a small pcb where I've been trying to use the LiquidCrystal library in 4-bit mode with the maple mini, but I can't seem to get it to work, did you ever get it working? - Unfortunatly I can't test 8-bit mode as this would mean redesigning the pcb.</p> <p>/Kalund </p> http://forums.leaflabs.com/topic.php?id=833#post-5847 Tue, 02 Aug 2011 14:29:23 +0000 mbolivar 5847@http://forums.leaflabs.com/ <p>Hey all,</p> <p>Back to posting after a while absent!</p> <p>I was messing around with this issue today, and the fix is simple: power off the USB peripheral. You can currently do this with usbPowerOff(), from usb.h.</p> <p>Example code:</p> <pre><code>#include &quot;usb.h&quot; uint8 pins[] = {23, 24, 25}; void setup() { SerialUSB.end(); usbPowerOff(); for (int i = 0; i &lt; 3; i++) { pinMode(pins[i], OUTPUT); } } void loop() { for (int i = 0; i &lt; 3; i++) { togglePin(pins[i]); } delay(50); }</code></pre> http://forums.leaflabs.com/topic.php?id=833#post-5037 Tue, 07 Jun 2011 11:58:42 +0000 mbolivar 5037@http://forums.leaflabs.com/ <p>Feel free to choose between filing the ticket yourself and posting it here; either way is fine with me. We get email whenever anything happens on the bug tracker, so it won't get ignored. </p> http://forums.leaflabs.com/topic.php?id=833#post-4999 Mon, 06 Jun 2011 15:22:27 +0000 Xavier 4999@http://forums.leaflabs.com/ <p>Thanks Marti,<br /> Should we enter bug directly in the bug tracker or do you prefer to do it yourself ?<br /> Xavier </p> http://forums.leaflabs.com/topic.php?id=833#post-4997 Mon, 06 Jun 2011 13:59:57 +0000 mbolivar 4997@http://forums.leaflabs.com/ <p>Hi Xavier,</p> <p>Re: pins 23 and 24, I've reproduced the issue and filed a ticket:</p> <p><a href="http://code.google.com/p/leaflabs/issues/detail?id=71" rel="nofollow">http://code.google.com/p/leaflabs/issues/detail?id=71</a></p> <p>Fixing this bug blocks libmaple 0.0.12. </p> http://forums.leaflabs.com/topic.php?id=833#post-4973 Sat, 04 Jun 2011 17:04:57 +0000 Xavier 4973@http://forums.leaflabs.com/ <p>Hello,</p> <p>I just understood why i could not get My LCD (LiquidCrystal) working with my maple mini.<br /> I used pin 24 among the 10 pins.</p> <p>I saw in the doc i had to disable USBSerial to be able to use pins 23 and 24 but adding SerialUSB.end() did not change anything.</p> <p>A second problem : i cannot make the LiquidCrystal work in 4 bits mode.<br /> Simple example :<br /> "LiquidCrystal lcd(2,3,4,5,6,7,27,26,25,22);" Works.<br /> with the same hardware wiring :<br /> "LiquidCrystal lcd(2,3,4,5,6,7);" do not Work.</p> <p>Anyone else noticed that ?<br /> Thanks for any help,</p> <p>Xavier </p>