Producing Embedded Controller using RealTime Workshop

Tom
2011 2 22
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更新时间：2016 12 9
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Hi,
I getting seriously stuck trying to understand Real Time Workshop.
For a project at university, I am trying to move our MATLAB/Simulink based control algorithms onto on-board processors, namely Gumstix Overo COM's. They run a version of command line Linux and are not suited to running the Simulink models within the Matlab Environment.
Currently we are having to manually translate our Simulink models into C++ code, but I understand it is possible to produce C++ source code directly from within Simulink using the RTW.
I have succeeded in doing this, but the generated source code won't compile using g++ or the 'make' command once the files are on the Overo COM's. The only thing I can reliably produce at the moment is a *.exe which isn't suitable for the target system.
I'm sure there is something really fundamental that I'm doing wrong, but I can't seem to find a good guide or help file to describe exactly how to do what I'm trying to do.
Host Environment: Windows x64 Laptop
Target Environment: Gumstix Overo Fire (Linux & ARM Cortex-A8 OMAP3530 Processor)
Thanks in Advance.

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Kaustubha Govind
Kaustubha Govind 2011-2-22

0 个投票

Did you make sure that you have transported all files for building on another target? See Relocating Code to Another Development Environment

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Tom
Tom 2011-2-22
编辑：Walter Roberson 2016-11-18
No I hadn't. But I had got around it by copying the missing files from my computer when they came up as compiling errors. Thanks for the advice, at least I know the proper way to do that and that I was heading in the right direction.
I'm still getting errors though. I'm not sure what I should be looking at to fix this. ..
root@overo:~/Test_20110222_ert_rtw# make Test_20110222
g++ Test_20110222.cpp -o Test_20110222
/usr/lib/gcc/arm-angstrom-linux-gnueabi/4.3.3/../../../crt1.o: In function `_start':
init.c:(.text+0x30): undefined reference to `main'
/tmp/ccl2H2y9.o: In function `Test_20110222_step':
Test_20110222.cpp:(.text+0x16c): undefined reference to `rt_UpdateTXYLogVars'
Test_20110222.cpp:(.text+0x2f4): undefined reference to `Test_20110222_P'
/tmp/ccl2H2y9.o: In function `Test_20110222_terminate': Test_20110222.cpp:(.text+0x614): undefined reference to `rt_StopDataLogging'
/tmp/ccl2H2y9.o: In function `Test_20110222_initialize':
Test_20110222.cpp:(.text+0x65c): undefined reference to `rt_InitInfAndNaN'
Test_20110222.cpp:(.text+0x81c): undefined reference to `rt_StartDataLoggingWithStartTime'
collect2: ld returned 1 exit status
make: * [Test_20110222] Error 1
Kaustubha Govind
Kaustubha Govind 2011-2-23
Did you modify the makefile for the Linux platform? The one generated for Windows probably uses LCC or MSVC. The compilation command that you use:
g++ Test_20110222.cpp -o Test_20110222
may not be sufficient for compilation. For example, there may be other object/library files to link against. Try and imitate how the build is done on Windows.
Tom
Tom 2011-2-28
Hi,
Thanks for the help.
I thought that the compilation command looked a little short. I've had a look through the makefile, but I'm not sure I understand a lot of it. Can you offer any advice as to what I should be changing?
Thanks
Tom
Kaustubha Govind
Kaustubha Govind 2011-2-28
编辑：Walter Roberson 2016-11-18
Set Verbose Build http://www.mathworks.com/help/toolbox/rtw/ref/bq259jx-1.html#bq26cg_-1 to 'on' on Windows, to see what the exact build command used is.
Dzung
Dzung 2014-9-3
Hi all, I'm building and Simulink block using Simulink code generator by VC++ 2010, now I have some unresolved symbols when linking. Some body could tell me how to find these symbols in which libraries: rt_StartDataLoggingWithStartTime, rt_UpdateTXYLogVars.
S An
S An 2016-11-17
Hi, I meet the same question. Have you solved your problem? Which libraries are they in?
ds li
ds li 2016-11-18
I also meet the same question, do you have the better solution?
Mar Kim
Mar Kim 2016-12-9
I too have a linking error for rt_StartDataLoggingWithStartTime, rt_UpdateTXYLogVars. Please tell us what library contains them. I actually need to compile this for ARM, so if I would prefer access to the source code.

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