<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><div>Kicking it around in the back of my head at work today...<br><br>I tried doing a compile to assembly language for the stellaris - and it choked giving the error from t_embed.pas. The error comes from the portion of the program trying to generate a linker script.<br><br>Looking at t_embed.pas, it looks like every single flavor of ARM controller will require it's own subsection of the case() statement. This can easily get long and ugly. As the only thing that changes between most of the arm variants is the memory layout - why not provide a generic "stellaris" switch - with reads in a text file containing the memory map and stack top (the rest of the link file remains the same for all variants of ARM) ? <br><br>This way - switching to a new variant of stellaris only
requires tweaking a memory map file - rather than a re-build and patch of t_embed.pas ? For that matter - entirely foreign Cortex M3 parts could be easily supported without requiring changes to the compiler.<br><br>Just pondering how to make it easier and more flexible ...<br></div><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><br><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Geoffrey Barton <mrb@periphon.net><br><b><span style="font-weight: bold;">To:</span></b> FPC developers' list <fpc-devel@lists.freepascal.org><br><b><span style="font-weight: bold;">Sent:</span></b> Mon, August 8, 2011 12:17:03 PM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [fpc-devel] Arm Thumb2 - Stellaris status<br></font><br>
<meta http-equiv="x-dns-prefetch-control" content="off"><base><br><div><div>On 7 Aug 2011, at 11:14, John Clymer wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse:separate;font-family:Verdana;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;orphans:2;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-spacing:0px;font-size:medium;"><div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:times, serif;font-size:12pt;">Ok. Give me a week or so (very hectic schedule right now...) And I will see if I can't patch it up some. </div></div></span></blockquote><div><br></div><div><br></div><div>To save you some time perhaps, the following was for lm3s9b92 and rtl/embedded/arm/stellaris.pas; I only tested with that device:-</div><div><br></div><div>1<span
class="Apple-tab-span" style="white-space:pre;"> </span>in cpuinfo.pas, tcontrollertype should include, ct_lm3s9b92 rather than stellaris</div><div>2<span class="Apple-tab-span" style="white-space:pre;"> </span>also 'stellaris' in controllerunitstr should be 'lm3s9b92</div><div><br></div><div>3<span class="Apple-tab-span" style="white-space:pre;"> </span>in compiler/systems/t_embed.pas add:-</div><div><br></div><div><div>ct_lm3s9b92:</div><div> with linkres do</div><div> begin</div><div> Add('ENTRY(_START)');</div><div> Add('MEMORY');</div><div> Add('{');</div><div> Add(' flash : ORIGIN = 0x00000000, LENGTH = 256K');</div><div> Add(' ram : ORIGIN = 0x20000000, LENGTH = 96K');</div><div>
Add('}');</div><div> Add('_stack_top = 0x20017FFC;');</div><div> end;</div><div><br></div><div>I also found I needed to comment out the controller types other than stellaris in rtl/embedded/makefile.fpc.</div><div><br></div></div><div>Then remake make,and make the compiler.</div><div><br></div><blockquote type="cite"><div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:times, serif;font-size:12pt;">New to this - what is procedure to generate and submit patch set ?<br></div></div></blockquote><div><br></div>+1</div><div><br></div><div>but Florian did offer to integrate any updates himself :)</div><div><br></div><div>Geoffrey<br><blockquote type="cite"><div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:times, serif;font-size:12pt;"><br>Thanks !<br><div
style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:times, serif;font-size:12pt;"><br><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:arial, helvetica, sans-serif;font-size:10pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight:bold;">From:</span></b><span class="Apple-converted-space"> </span>Florian Klämpfl <<a rel="nofollow" ymailto="mailto:florian@freepascal.org" target="_blank" href="mailto:florian@freepascal.org">florian@freepascal.org</a>><br><b><span style="font-weight:bold;">To:</span></b><span class="Apple-converted-space"> </span>FPC developers' list <<a rel="nofollow" ymailto="mailto:fpc-devel@lists.freepascal.org" target="_blank" href="mailto:fpc-devel@lists.freepascal.org">fpc-devel@lists.freepascal.org</a>><br><b><span
style="font-weight:bold;">Sent:</span></b><span class="Apple-converted-space"> </span>Sun, August 7, 2011 12:15:02 AM<br><b><span style="font-weight:bold;">Subject:</span></b><span class="Apple-converted-space"> </span>Re: [fpc-devel] Arm Thumb2 - Stellaris status<br></font><br>Am 06.08.2011 13:35, schrieb John Clymer:<br>> Ok, maybe I'm missing something...<br>><span class="Apple-converted-space"> </span><br>> I can compile and get a binary for an STM32F103RE. However, if I<br>> attempt for the STELLARIS target, I get an error. I see where the error<br>> is coming from in t_embed.pas. It looks like the t_embed.pas file is<br>> missing linking information for the Stellaris. <span class="Apple-converted-space"> </span><br><br>Yes. arm embedded devices are only supported as far as somebody<br>contributed the compiler and rtl support. Problem is: we don't have any<br>chance to test it, so only
users of these devices can contribute the<br>support.<br><br>> Can someone confirm this<br>> is the case before I go on a wild chase changing things ?<br><br><br><br>_______________________________________________<br>fpc-devel maillist - <span class="Apple-converted-space"> </span><a rel="nofollow" ymailto="mailto:fpc-devel@lists.freepascal.org" target="_blank" href="mailto:fpc-devel@lists.freepascal.org">fpc-devel@lists.freepascal.org</a><br><span><span><a target="_blank" href="http://lists.freepascal.org/mailman/listinfo/fpc-devel">http://lists.freepascal.org/mailman/listinfo/fpc-devel</a></span></span><br></div></div></div>_______________________________________________<br>fpc-devel maillist - <a rel="nofollow" ymailto="mailto:fpc-devel@lists.freepascal.org" target="_blank" href="mailto:fpc-devel@lists.freepascal.org">fpc-devel@lists.freepascal.org</a><br><a rel="nofollow" target="_blank"
href="http://lists.freepascal.org/mailman/listinfo/fpc-devel">http://lists.freepascal.org/mailman/listinfo/fpc-devel</a><br></div></blockquote></div><br><meta http-equiv="x-dns-prefetch-control" content="on"></div></div>
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