LeafLabs Garden » User Favorites: alduxvm

LeafLabs Garden » User Favorites: alduxvm 394 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:19:51 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://forums.leaflabs.com/search.php snigelen on "atof or strtod???" http://forums.leaflabs.com/topic.php?id=663#post-3759 Sun, 27 Feb 2011 03:06:15 +0000 snigelen 3759@http://forums.leaflabs.com/ I'm glad you got it to work, and sorry for the false information. alduxvm on "atof or strtod???" http://forums.leaflabs.com/topic.php?id=663#post-3758 Sun, 27 Feb 2011 02:03:45 +0000 alduxvm 3758@http://forums.leaflabs.com/ Its working!!!! i found the issue... i had the libraries in these position: #include <Servo.h> #include "contexto.h" #include <stdlib.h> and when compiling, always get that error... i change stdlib to the upper position, and it worked... #include <stdlib.h> #include <Servo.h> #include "contexto.h" thanks a lot for the help!! maple rocks!!!!! mbolivar on "atof or strtod???" http://forums.leaflabs.com/topic.php?id=663#post-3757 Sun, 27 Feb 2011 01:53:11 +0000 mbolivar 3757@http://forums.leaflabs.com/ Ok, we looked into it, and it's a bug in wirish_math.h (where we mimic the Arduino behavior by providing abs as a macro, instead of using math.h's version, which is a function). newlib's stdlib.h seems to rely on abs being a function; since it's not, you get the compile error you posted. We'll fix this in the next release. For now, does the implementation from snigelen work for you? Bugtracker reference: <a href="http://code.google.com/p/leaflabs/issues/detail?id=57" rel="nofollow">http://code.google.com/p/leaflabs/issues/detail?id=57</a> mbolivar on "atof or strtod???" http://forums.leaflabs.com/topic.php?id=663#post-3756 Sun, 27 Feb 2011 01:41:37 +0000 mbolivar 3756@http://forums.leaflabs.com/ Can you maybe post your sketch in a pastebin? <a href="http://pastebin.com" rel="nofollow">http://pastebin.com</a> alduxvm on "atof or strtod???" http://forums.leaflabs.com/topic.php?id=663#post-3755 Sat, 26 Feb 2011 23:45:57 +0000 alduxvm 3755@http://forums.leaflabs.com/ I have already test it, is my ide bad?? hehehehe, i #include <stdlib.h> , use the function, and when i compile, i get this errors: Going to build using 'armcompiler' (ARM) Compiling core... Compiling libraries: Servo Compiling the sketch... /Applications/MapleIDE.app/Contents/Resources/Java/hardware/tools/arm/bin/../lib/gcc/arm-none-eabi/4.4.1/../../../../arm-none-eabi/include/stdlib.h:72: error: expected unqualified-id before 'int' /Applications/MapleIDE.app/Contents/Resources/Java/hardware/tools/arm/bin/../lib/gcc/arm-none-eabi/4.4.1/../../../../arm-none-eabi/include/stdlib.h:72: error: expected ')' before 'int' /Applications/MapleIDE.app/Contents/Resources/Java/hardware/tools/arm/bin/../lib/gcc/arm-none-eabi/4.4.1/../../../../arm-none-eabi/include/stdlib.h:72: error: expected ')' before 'int' /Applications/MapleIDE.app/Contents/Resources/Java/hardware/tools/arm/bin/../lib/gcc/arm-none-eabi/4.4.1/../../../../arm-none-eabi/include/stdlib.h:72: error: expected ')' before 'int' What could it be??? perry on "atof or strtod???" http://forums.leaflabs.com/topic.php?id=663#post-3752 Sat, 26 Feb 2011 20:29:23 +0000 perry 3752@http://forums.leaflabs.com/ We link against newlib (a small libc variant), so atof should be available. #include <stdlib.h> should be enough. gbulmer on "atof or strtod???" http://forums.leaflabs.com/topic.php?id=663#post-3751 Sat, 26 Feb 2011 19:46:38 +0000 gbulmer 3751@http://forums.leaflabs.com/ I should add atof is deprecated, and strtof/d/ld are the recommended way to do this type of conversion. gbulmer on "atof or strtod???" http://forums.leaflabs.com/topic.php?id=663#post-3749 Sat, 26 Feb 2011 17:37:34 +0000 gbulmer 3749@http://forums.leaflabs.com/ When I <code>#include <stdlib.h></code> both <code>atof(buf)</code> and <code>strtof(buf, NULL)</code> seem to exist. I've compiled, uploaded, seen a print statement (so the program is running), but not tested. alduxvm on "atof or strtod???" http://forums.leaflabs.com/topic.php?id=663#post-3748 Sat, 26 Feb 2011 15:50:10 +0000 alduxvm 3748@http://forums.leaflabs.com/ Very strange... i compile it, i upload it, but the D1 led starts to blink in a odd way, i never seen this... and of course, its not doing anything, what can it be??? snigelen on "atof or strtod???" http://forums.leaflabs.com/topic.php?id=663#post-3747 Sat, 26 Feb 2011 14:47:31 +0000 snigelen 3747@http://forums.leaflabs.com/ Sorry, I forgot to add <code>#include <ctype.h></code> (and to remove the unused variable dp) And to reset negative to zero if there's an exponent. Here's an updated version that also handles a leading '+'. <pre><code>#include <ctype.h> float my_atof(char *s) { float f = 0.0, fd = 0.0, d = 0.0; int fe = 0; char negative = 0; while (isspace(*s) && *s != 0) s++; if (*s == '+') s++; if (*s == '-') { s++; negative = 1; } while (isdigit(*s) && *s != 0) { f *= 10; f += (*s - '0'); s++; } // Decimals if (*s == '.') { s++; d = 1.0; while (isdigit(*s) && *s != 0) { fd *= 10; d *= 10; fd += (*s - '0'); s++; } fd /= d; } f += fd; if (negative) f = -f; // Exponent if (*s == 'e' || *s == 'E') { s++; negative = 0; if (*s == '+') { s++; } else if (*s == '-') { s++; negative = 1; } while (isdigit(*s) && *s != 0 ) { fe *= 10; fe += (*s - '0'); s++; } if (negative) fe = -fe; #if 1 f *= pow(10,fe); #else // A better way for this? for (; fe; fe--) if (negative) f /= 10; else f *= 10; #endif } return f; }</code></pre> alduxvm on "atof or strtod???" http://forums.leaflabs.com/topic.php?id=663#post-3746 Sat, 26 Feb 2011 14:27:08 +0000 alduxvm 3746@http://forums.leaflabs.com/ Thanks!! Im testing it... do you have the isspace() and isdigit() functions??? 10x!!! snigelen on "atof or strtod???" http://forums.leaflabs.com/topic.php?id=663#post-3745 Sat, 26 Feb 2011 13:45:45 +0000 snigelen 3745@http://forums.leaflabs.com/ There's no atof, but it can be done (some way I don't remember exactly how). But I wrote a quick and dirty (no fancy stuff) atof a couple of days ago. Here it is <pre><code>float my_atof(char *s) { float f = 0.0, fd = 0.0, d = 0.0; int fe = 0; char negative = 0, dp = 0; while (isspace(*s) && *s != 0) s++; if (*s == '-') { s++; negative = 1; } while (isdigit(*s) && *s != 0 ) { f *= 10; f += (*s - '0'); s++; } // Decimals if (*s == '.') { s++; d = 1.0; while (isdigit(*s) && *s != 0 ) { fd *= 10; d *= 10; fd += (*s - '0'); s++; } fd /= d; } f += fd; if (negative) f = -f; // Exponent if (*s == 'e' || *s == 'E') { s++; if (*s == '+') { s++; negative = 0; } else if (*s == '-') { s++; negative = 1; } while (isdigit(*s) && *s != 0 ) { fe *= 10; fe += (*s - '0'); s++; } #if 1 if (negative) fe = -fe; f *= pow(10,fe); #else // A better way for this? for (; fe; fe--) if (negative) f /= 10; else f *= 10; #endif } return f; }</code></pre> Not very well tested, but it seems to work for me (reading a couple of multimeters over rs232). (Changed all "*s != tick backslash zero tick" to "*s != 0") alduxvm on "atof or strtod???" http://forums.leaflabs.com/topic.php?id=663#post-3744 Sat, 26 Feb 2011 11:14:44 +0000 alduxvm 3744@http://forums.leaflabs.com/ Hi!! Im reading serial data that comes from a imu (razor 9dof, with a atmega onboard) when i read it, i store it in a char array, and in arduino, i just simply use atof, and it will be a floating variable, but, there is no atof define in the maple ide, right?? thanks!! cheers!!