http://forums.leaflabs.com/topic.php?id=1218 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:24:19 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=1218#post-7370 Fri, 16 Dec 2011 17:35:31 +0000 poslathian 7370@http://forums.leaflabs.com/ <p>thanks for the pointers, we will incorporate the fixes!</p> <p>that serialx.read() always returns actually got me earlier today. SerialUSB.read() is blocking, but Serialx.read() is not. Apparently there is a good technical reason for this, but I dont know what it is... mbolivar? </p> http://forums.leaflabs.com/topic.php?id=1218#post-7352 Wed, 14 Dec 2011 19:26:54 +0000 cyberia 7352@http://forums.leaflabs.com/ <p>hey<br /> i've made a little robot that is controlled via xbee using the maple r5 and as well as the serialx.read() problems identified in <a href="http://forums.leaflabs.com/topic.php?id=1174" rel="nofollow">http://forums.leaflabs.com/topic.php?id=1174</a> i have also discovered an error in the documentation for char.<br /> -------------------------------------------------------------------------</p> <pre><code>loop(){ char cmd = serialx.read() ....... }</code></pre> <p>does not block but iterates through the whole buffer, meaning the data recieved from the xbee is repeatedly read every minute or so, it just mostly reads out empty bytes.</p> <p><code>while(serialx.available==0);</code></p> <p>fixes it, but it took me a long time to work out what the issue was.<br /> -------------------------------------------------------------------------<br /> In the language reference, it says that char is a signed byte and "unsigned char" is the unsigned version, but unless "signed char" is used it is in fact unsigned. took me a while to work that out too, but should be fairly easy to fix.</p> <p>t </p>