http://talk.jeelabs.net/tags/arduino Discussion about Jee Labs projects en-US Sat, 11 Sep 2010 02:57:06 +0000 http://bbpress.org/?v=1.0.2 q http://talk.jeelabs.net/search.php http://talk.jeelabs.net/topic/483/page/2#post-2707 Mon, 06 Sep 2010 22:02:31 +0000 andras 2707@http://talk.jeelabs.net/ <p>I use 0018 on Ubuntu 10.04. The /tmp/buildxxxxxx.tmp is cleaned up here only after the IDE is closed.</p> http://talk.jeelabs.net/topic/483/page/2#post-2706 Mon, 06 Sep 2010 20:51:52 +0000 raalst 2706@http://talk.jeelabs.net/ <p>just for the record, in (my) Ubuntu the IDE creates "anonymous" directories in the /tmp directory but deletes them after the compile. hopefully version 0019 does it differently.</p> <p>That shift-trick is very useful ! thanks !</p> http://talk.jeelabs.net/topic/483#post-2704 Sun, 05 Sep 2010 20:05:38 +0000 Jean-Claude 2704@http://talk.jeelabs.net/ <p>Press the SHIFT key when clicking on the leftmost Run button, and you'll get more info on what the compile does, including where the files end up. This too was added in 0018, IIRC.</p> http://talk.jeelabs.net/topic/483#post-2702 Sun, 05 Sep 2010 18:08:25 +0000 tankslappa 2702@http://talk.jeelabs.net/ <p>0018 introduced some "tidying up", which made it a complete pain if you wanted to get to any of the generate files (.hex for example). In windows they turn up in %temp%, but you have to copy them out before you close arduino, or it'll delete them all.</p> <p>No idea where they end up in ubuntu, sorry.</p> http://talk.jeelabs.net/topic/483#post-2701 Sun, 05 Sep 2010 15:50:02 +0000 raalst 2701@http://talk.jeelabs.net/ <p>avr-size is what I was looking for. Thanks.</p> <p>but now I do not seem to be able to find my .o files. I looked in /tmp and my sketch directories. Also the preferences file does not provide more clues (at least to my untrained eye). Does the IDE clean them up after use ? I did compile one of the sketches without uploading, thinking it would have to keep the file. I did a find from my home directory, but alas. Arduino 0018 on ubuntu.</p> <p>anybody any pointers?</p> http://talk.jeelabs.net/topic/483#post-2700 Sun, 05 Sep 2010 10:49:26 +0000 Jean-Claude 2700@http://talk.jeelabs.net/ <p>You can google for "avr-size" and check <a href="http://www.nongnu.org/avr-libc/user-manual/malloc.html">http://www.nongnu.org/avr-libc/user-manual/malloc.html</a> for some info.</p> <p>Here's a sketch which prints out the free memory at run time:</p> <pre><code>static word memFree() { extern char* __brkval; char a; return __brkval ? &amp;a - __brkval : 0; } void setup () { Serial.begin(57600); Serial.println("\n[memFree]"); // forces loading, adds approx 500 bytes to code footprint malloc(65535); Serial.println(memFree()); } </code></pre> <p>Note that there has to be a call to malloc() somewhere for this calculation to work. I added one to make sure (which always fails, and therefore doesn't consume memory, but it still sets things up).</p> http://talk.jeelabs.net/topic/483#post-2699 Sun, 05 Sep 2010 09:32:55 +0000 raalst 2699@http://talk.jeelabs.net/ <p>Just quick question (because I'm lazy etc.)</p> <p>It seems that the GCC underlying the Arduino IDE reports on memory use, how do you guys get that information out ?</p> <p>I have had a few discussions with my arduino where it simply stopped functioning after I added new coding (with a large array declaration..).</p> <p>Trimming the array persuaded the Arduino to take up it's job again, but I would have loved to be able to check up-front whether the array would fit the memory.</p> http://talk.jeelabs.net/topic/483#post-2698 Sat, 04 Sep 2010 19:12:44 +0000 Jean-Claude 2698@http://talk.jeelabs.net/ <p>The trouble is not C or C++ ... it's the severely limited RAM, and hence heap &amp; stack space.</p> http://talk.jeelabs.net/topic/483#post-2697 Sat, 04 Sep 2010 18:59:01 +0000 tankslappa 2697@http://talk.jeelabs.net/ <p>@edwardhorsford</p> <p>Aye - Such is the joy of C... Someone please remind me how it became the dominant language, it still makes me shake my head is disbelief!</p> http://talk.jeelabs.net/topic/483#post-2695 Sat, 04 Sep 2010 17:43:17 +0000 edwardhorsford 2695@http://talk.jeelabs.net/ <p>@steve be careful with the string class. Although it brings wonderful features, there's also great chance for overflows and such if you're not careful.</p>