http://forums.leaflabs.com/topic.php?id=1971 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:23:50 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=1971#post-11436 Thu, 28 Jun 2012 00:39:01 +0000 mbolivar 11436@http://forums.leaflabs.com/ <blockquote><p> If I create an empty main.cpp, I end up with an ELF file that is about 59K in size</p> </blockquote> <p>That's also curious. When I leave main.cpp empty, I get link errors, since <code>main()</code> (which <code>start_c()</code> calls) is undefined. Did you really mean an empty main.cpp? Perhaps you meant a "trivial" main.cpp, which still does things like call <code>init()</code>, like all of our example code does. If you call <code>init()</code>, you have to pay for it. </p> http://forums.leaflabs.com/topic.php?id=1971#post-11435 Wed, 27 Jun 2012 22:44:59 +0000 mbolivar 11435@http://forums.leaflabs.com/ <blockquote><p> What's all the code if I'm calling none of it?</p> </blockquote> <p>Interesting question. Off the top of my head: IRQ handlers, _start, start_c(). Check the disassembly in build/maple.disas to find out more!</p> <p>If you're interested in stripping the library down, it sounds like you're already well along in getting the tools together to figure out what's going on inside the final binary. Try building in verbose mode and reading the binutils documentation to find out more. </p> http://forums.leaflabs.com/topic.php?id=1971#post-11428 Wed, 27 Jun 2012 20:13:12 +0000 barrybrown 11428@http://forums.leaflabs.com/ <p>Somewhere in the docs, I thought I saw that the libraries needed to be statically compiled. I may be misremembering, however.</p> <p>If I create an empty main.cpp, I end up with an ELF file that is about 59K in size, of which about 46K is executable code:</p> <p><code><br /> Final Size:<br /> text data bss dec hex filename<br /> 46876 3004 9216 59096 e6d8 build/maple.elf<br /> </code></p> <p>What's all the code if I'm calling none of it? </p> http://forums.leaflabs.com/topic.php?id=1971#post-11426 Wed, 27 Jun 2012 18:10:22 +0000 ala42 11426@http://forums.leaflabs.com/ <p>Unused libmaple code is not added to the linked binary file.<br /> What makes you think your code will not fit into the available flashrom ? </p> http://forums.leaflabs.com/topic.php?id=1971#post-11425 Wed, 27 Jun 2012 16:09:08 +0000 barrybrown 11425@http://forums.leaflabs.com/ <p>Hi all,</p> <p>New to Maple. I'm interested in using the Maple as a generic computer: just a processor, RAM, ROM, and console I/O. I've been starting out with the libmaple examples using the command-line toolchain.</p> <p>How much storage does libmaple use? How much will be left over for my own programs?</p> <p>For my experiments, I don't need most of libmaple; I just need the SerialUSB routines (or their C library equivalents, such as putchar, getchar, and printf). Where can I find information about stripping down libmaple to just the essentials?</p> <p>That probably leaves me with one final question: do I even need libmaple at all? Can I do console I/O through the USB serial port without it?</p> <p>Thanks for your help! I look forward to reporting on what I'm up to when I get it working. :) </p>