http://forums.leaflabs.com/topic.php?id=1118 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:17:23 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=1118#post-6986 Tue, 25 Oct 2011 17:15:16 +0000 poslathian 6986@http://forums.leaflabs.com/ <p>Its definitely worth something ;) thanks for the suggestion. </p> http://forums.leaflabs.com/topic.php?id=1118#post-6982 Tue, 25 Oct 2011 15:23:24 +0000 robertcook 6982@http://forums.leaflabs.com/ <p>OK. I'll take a stab at it. FWIW, I vote to have actual headers for the JTAG pins in the non-beta rev of the board. </p> http://forums.leaflabs.com/topic.php?id=1118#post-6971 Tue, 25 Oct 2011 10:21:47 +0000 mbolivar 6971@http://forums.leaflabs.com/ <p>CONN_5X2 is the JTAG connector. The Git commit tagged 'beta' contains the schematics used on the Beta release:</p> <p><a href="https://github.com/leaflabs/maplenative/blob/beta/schematicpdfs/conn.ps" rel="nofollow">https://github.com/leaflabs/maplenative/blob/beta/schematicpdfs/conn.ps</a></p> <p>Comparing with the layout (mapleNative.brd), viewing from the top is correct (the top left pad is connected to VCC).</p> <p>In case you can't conveniently view PostScript, I checked, and there haven't been any changes to that portion of the schematic since then.</p> <p>By the way, don't forget to disable JTAG (by calling <a href="http://leaflabs.com/docs/lang/api/disabledebugports.html">disableDebugPorts()</a>) before turning on SPI3. </p> http://forums.leaflabs.com/topic.php?id=1118#post-6961 Mon, 24 Oct 2011 17:44:37 +0000 robertcook 6961@http://forums.leaflabs.com/ <p>I just got my Maple Native and I'm trying to use SPI3. The docs suggest that I'll need to tap into the JTAG pads for some of the SPI3 lines. I don't see any docs that give me great confidence of the JTAG pinout, although I imagine that this one might be right (viewed from the top.)</p> <p><a href="https://github.com/leaflabs/maplenative/blob/master/schematicpdfs/mapleNative-conn.pdf" rel="nofollow">https://github.com/leaflabs/maplenative/blob/master/schematicpdfs/mapleNative-conn.pdf</a></p> <p>Does this represent the correct pinout? </p> http://forums.leaflabs.com/topic.php?id=1118#post-6922 Thu, 20 Oct 2011 21:59:12 +0000 mbolivar 6922@http://forums.leaflabs.com/ <p>Also, if by "leave the sram chip out" you mean "turn off the SRAM chip and use internal SRAM only", then the answer is "sort of".</p> <p>You can definitely disable the FSMC to claim those GPIOs, but the heap is on the SRAM chip by default. You'll need to tweak the linker script to do this. Here's the base linker script for the Maple Native:</p> <p><a href="https://github.com/leaflabs/libmaple/blob/v0.0.12/support/ld/maple_native/flash.ld" rel="nofollow">https://github.com/leaflabs/libmaple/blob/v0.0.12/support/ld/maple_native/flash.ld</a></p> <p>If you comment out the lines that define "_lm_heap_start" and "_lm_heap_end", then the heap will live on the internal SRAM and you can use the pins on the FSMC header as regular GPIOs.</p> <p>If that's what you mean, this would be a nice addition to the library -- maybe you'd like to send us a <a href="http://leaflabs.com/docs/libmaple/contributing.html#submitting-via-github-pull-request-preferred">pull request</a> with a "flash_no_sram.ld" linker script? </p> http://forums.leaflabs.com/topic.php?id=1118#post-6889 Mon, 17 Oct 2011 11:44:03 +0000 poslathian 6889@http://forums.leaflabs.com/ <p>I should mention that the re-flashing procedure is the same. </p> http://forums.leaflabs.com/topic.php?id=1118#post-6888 Mon, 17 Oct 2011 11:43:49 +0000 poslathian 6888@http://forums.leaflabs.com/ <p>a "new" bootloader? The bootloader for maple native does not depend on the SRAM at all, so you should be ok there. Make sure to use the Maple Native bootloader, not the Maple bootloader, as there are some key differences: <a href="http://static.leaflabs.com/pub/leaflabs/maple-bootloader/" rel="nofollow">http://static.leaflabs.com/pub/leaflabs/maple-bootloader/</a> </p> http://forums.leaflabs.com/topic.php?id=1118#post-6877 Sat, 15 Oct 2011 11:16:56 +0000 house91320 6877@http://forums.leaflabs.com/ <p>Ok cool , has anyone tried uploading a new boot loader? </p> http://forums.leaflabs.com/topic.php?id=1118#post-6874 Sat, 15 Oct 2011 01:33:20 +0000 kaipyroami 6874@http://forums.leaflabs.com/ <p>I have a native and I program it just like the standard maple without flashing the sram. </p> http://forums.leaflabs.com/topic.php?id=1118#post-6873 Fri, 14 Oct 2011 23:55:32 +0000 house91320 6873@http://forums.leaflabs.com/ <p>I am working on a project were I am embedding a maple, the problem I am having is I don't have enough i/o. Well the new maple native solves this problem. The questions I am having are, can I leave the sram chip out, I assume I can I just want to make sure, second can I program the bootloader with the same proses? </p>