http://forums.leaflabs.com/topic.php?id=715 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:26:30 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=715#post-4211 Thu, 07 Apr 2011 12:07:33 +0000 gbulmer 4211@http://forums.leaflabs.com/ <p>mbolivar - Thanks for the detailed answer. Very helpful.<br /> I'm very pleased it is nice and low cost :-) </p> http://forums.leaflabs.com/topic.php?id=715#post-4201 Thu, 07 Apr 2011 10:40:08 +0000 mbolivar 4201@http://forums.leaflabs.com/ <p>gbulmer,</p> <p>They live in Flash when they are used. We call GCC with -fdata-sections -ffunction-sections, and call the linker with --gc-sections, so unless those arrays are used (directly or indirectly) by functions you call, the linker should be able to optimize them out. </p> http://forums.leaflabs.com/topic.php?id=715#post-4189 Wed, 06 Apr 2011 18:28:38 +0000 gbulmer 4189@http://forums.leaflabs.com/ <p>mbolivar - that is a very helpful page, thanks.</p> <p>I have a small concern about the space consumed by the supporting tables.<br /> Should I assume it is very cheap, or I don't "pay" (in space) if I don't use them?<br /> Do they live in Flash if I do use them?</p> <p>(full disclosure: I am not a member of the LeafLabs staff) </p> http://forums.leaflabs.com/topic.php?id=715#post-4187 Wed, 06 Apr 2011 18:10:51 +0000 mbolivar 4187@http://forums.leaflabs.com/ <p>gbulmer,</p> <blockquote><p> mbolivar - presumably the processor frequency is factored out to a 'well known' constant label so that code can use a libmaple exported value rather than wiring in 72000000L?</p> </blockquote> <p>Yes, the constant CYCLES_PER_MICROSECOND can be used for this purpose; see e.g.</p> <p><a href="https://github.com/leaflabs/libmaple/blob/refactor/wirish/boards/maple.h#L38" rel="nofollow">https://github.com/leaflabs/libmaple/blob/refactor/wirish/boards/maple.h#L38</a></p> <p>Edit: These sorts of values are documented under the "board-specific values" page, which will be included with the regular HTML docs under leaflabs.com/docs. Here is that page as it stands in the current refactor tree:</p> <p><a href="https://github.com/leaflabs/libmaple/blob/refactor/docs/source/lang/api/board-values.rst" rel="nofollow">https://github.com/leaflabs/libmaple/blob/refactor/docs/source/lang/api/board-values.rst</a> </p> http://forums.leaflabs.com/topic.php?id=715#post-4168 Wed, 06 Apr 2011 04:24:22 +0000 Fadis 4168@http://forums.leaflabs.com/ <p>&gt; <a href="https://github.com/leaflabs/libmaple/blob/refactor/libmaple/timer.h" rel="nofollow">https://github.com/leaflabs/libmaple/blob/refactor/libmaple/timer.h</a><br /> The new libmaple looks interesting!<br /> I'm busy these 2 days, but I'll try to write a patch for the development code after that. </p> http://forums.leaflabs.com/topic.php?id=715#post-4164 Tue, 05 Apr 2011 20:48:31 +0000 gbulmer 4164@http://forums.leaflabs.com/ <p>mbolivar - presumably the processor frequency is factored out to a 'well known' constant label so that code can use a libmaple exported value rather than wiring in 72000000L?</p> <p>(It would be preferable for the value to be a visible value, rather than simply a global name, so that things like (float)MAPLE_FREQUENCY get done at compile time) </p> http://forums.leaflabs.com/topic.php?id=715#post-4145 Mon, 04 Apr 2011 16:16:57 +0000 mbolivar 4145@http://forums.leaflabs.com/ <p>Hi Fadis,</p> <p>Thanks for the patch! Unfortunately, it won't apply to the current development libmaple development code (which is the "refactor" github branch). Much has changed in libmaple since the last release, and the low-level timer API you are using no longer exists.</p> <p>For now, preliminary information on how libmaple is being restructured is available here:</p> <p><a href="http://static.leaflabs.com/mbolivar/libmaple_design/index.html" rel="nofollow">http://static.leaflabs.com/mbolivar/libmaple_design/index.html</a></p> <p>The old file timers.h became the new timer.h; the new version has been made public, and is available here:</p> <p><a href="https://github.com/leaflabs/libmaple/blob/refactor/libmaple/timer.h" rel="nofollow">https://github.com/leaflabs/libmaple/blob/refactor/libmaple/timer.h</a></p> <p>I am trying to finish the work going on in the refactor branch by the end of the week; we are doing it in order to provide you and the growing number of other community contributors with a stable API to work against. The new libmaple interfaces are not expected to change for the foreseeable future.</p> <p>We would love to see this patch redone in terms of the new timer API. Thanks again! </p> http://forums.leaflabs.com/topic.php?id=715#post-4122 Mon, 04 Apr 2011 00:56:37 +0000 Fadis 4122@http://forums.leaflabs.com/ <p>Hello.<br /> I made a patch to add Arduino style tone() and notone() functions for MapleIDE 0.0.9.<br /> Now the Maple can BEEP using hardware PWM.</p> <p>patch:<br /> <a href="http://ideone.com/45dy7" rel="nofollow">http://ideone.com/45dy7</a></p> <p>demo:<br /> <a href="http://youtu.be/MjRLknXoCDc" rel="nofollow">http://youtu.be/MjRLknXoCDc</a></p> <p>Since tone(pin, frequency, duration) looks pretty complex to implement, it is not supported yet. </p>