LeafLabs Garden » Topic: A direct challenge to the Maple A Team ... Scanf

LeafLabs Garden » Topic: A direct challenge to the Maple A Team ... Scanf http://forums.leaflabs.com/topic.php?id=65 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:17:45 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://forums.leaflabs.com/search.php perry on "A direct challenge to the Maple A Team ... Scanf" http://forums.leaflabs.com/topic.php?id=65#post-348 Fri, 25 Jun 2010 14:38:26 +0000 perry 348@http://forums.leaflabs.com/ There are newlib-supplied iprintf/iscanf functions that do not support floating point specifiers are are approximately half the size of their larger brothers. I'll try to do the plumbing needed today to let you read out/into the serial port. If you look at syscalls.c, it already used to do that--I commented those lines out after I removed the stm32 peripheral library. poslathian on "A direct challenge to the Maple A Team ... Scanf" http://forums.leaflabs.com/topic.php?id=65#post-345 Fri, 25 Jun 2010 13:56:17 +0000 poslathian 345@http://forums.leaflabs.com/ be prepared to burn a non negligible amount of your flash! I managed to get by with atoi and int2str that were hand coded and came in at only an extra k. Pull in printf and be prepared to spend 25k of program rom. Of course, that might not be a huge deal for a lot of projects. leaflabsandy on "A direct challenge to the Maple A Team ... Scanf" http://forums.leaflabs.com/topic.php?id=65#post-321 Thu, 24 Jun 2010 09:35:56 +0000 leaflabsandy 321@http://forums.leaflabs.com/ Having both scanf and printf would be even better! If both functions are already in the "library-libc" and only the "hooks" are needed to attached to the Uart(s) then by having both commands, would it greatly increase the Maple's overhead? perry on "A direct challenge to the Maple A Team ... Scanf" http://forums.leaflabs.com/topic.php?id=65#post-317 Wed, 23 Jun 2010 20:55:48 +0000 perry 317@http://forums.leaflabs.com/ 'Real' scanf. printf/scanf are already implemented and come as part of newlib (libc). all that really needs to be done is to implement a handful of lower level newlib syscall stubs to read/write out a uart. see libmaple/syscalls.c for where they are in the libmaple tree. I can put it on my stack, or if somebody wants to implement it, patches are welcome. leaflabsandy on "A direct challenge to the Maple A Team ... Scanf" http://forums.leaflabs.com/topic.php?id=65#post-315 Wed, 23 Jun 2010 19:20:28 +0000 leaflabsandy 315@http://forums.leaflabs.com/ 'real' C standard scanf - would make serial input easy. gbulmer on "A direct challenge to the Maple A Team ... Scanf" http://forums.leaflabs.com/topic.php?id=65#post-314 Wed, 23 Jun 2010 18:43:44 +0000 gbulmer 314@http://forums.leaflabs.com/ Do you mean 'real' C standard scanf (or fscanf) functionality? Like this: <a href="http://www.opengroup.org/onlinepubs/009695399/functions/scanf.html" rel="nofollow">http://www.opengroup.org/onlinepubs/009695399/functions/scanf.html</a> or would you be happy with a subset of that functionality? perry on "A direct challenge to the Maple A Team ... Scanf" http://forums.leaflabs.com/topic.php?id=65#post-313 Wed, 23 Jun 2010 18:10:22 +0000 perry 313@http://forums.leaflabs.com/ Can do, shouldn't be too hard. Mostly the hard part is coming up with a friendly API for doing so. leaflabsandy on "A direct challenge to the Maple A Team ... Scanf" http://forums.leaflabs.com/topic.php?id=65#post-312 Wed, 23 Jun 2010 16:50:06 +0000 leaflabsandy 312@http://forums.leaflabs.com/ A direct challenge to the Maple A Team ... Scanf Since the Maple has many more comports than the standard Arduino there is one command/function that the Arduino design team refused or could not or would not implement - Scanf. This command/funtion is badly needed on any microcontroller with multiple serial ports. The scanf() function reads input from stdin, according to the given format, and stores the data in the other arguments. It works a lot like printf(). ... Is the Maple A Team up to this task?