How to add libraries stored on the remote target (Raspberry Pi)

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Sylvain 2023-2-27

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https://ww2.mathworks.cn/matlabcentral/answers/1919610-how-to-add-libraries-stored-on-the-remote-target-raspberry-pi

评论： Sylvain 2023-3-10

Good day !

I have developed a piece of code to read i2c buffer (32 bits) on a Raspberry Pi. It works well on the Pi, and I am trying to implement the code as a Matlab system object.

I need to add the following libraries to make it work:

#include <linux/i2c-dev.h>
#include <i2c/smbus.h>

How should this be added to the Matlab system object ?

My first guess is that it should not require any link flags.

My second guess this is: use the addLinkerFlags function, but I have no idea what argument should be added.

function updateBuildInfo(buildInfo, context)
            if context.isCodeGenTarget('rtw')
                % Update buildInfo
                srcDir = fullfile(fileparts(mfilename('fullpath')),'src'); %#ok<NASGU>
                includeDir = fullfile(fileparts(mfilename('fullpath')),'include');
                addIncludePaths(buildInfo,includeDir);
                % Use the following API's to add include files, sources and
                % linker flags
                addIncludeFiles(buildInfo,'I2C_read.h',includeDir);
                addSourceFiles(buildInfo,'I2C_read.c',srcDir);
%                 addLinkFlags(buildInfo,{'-lwiringPi'});
                %addLinkObjects(buildInfo,'sourcelib.a',srcDir);
                %addCompileFlags(buildInfo,{'-D_DEBUG=1'});
                %addDefines(buildInfo,'MY_DEFINE_1')
            end

any help ?

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Prasanth Sunkara 2023-3-10

Hi Sylvain,

I dont think you need any explicit linker flags for this header. In which case, you dont have to use addLinkFlags API. By the way, is there any specific reason as to why you are rewriting i2c block/function? There is already a MATLAB function and Simulink blocks for i2c from the Raspberry Pi Support Package

Sylvain 2023-3-10

Hi Prasanth,

thanks for your comments. I guess we have discuss this during our call last week with one of your colleague from the UK Office.

I am developping some drivers for the raspberry Pi, (fan controller) using the standard i2c blocks. The main issue are:

translation of some existing code into simulink: eg. read register > compare it to a value > update register
Addition of delay blocks
long compilation time (so that I need to use reference models)

I am happy to discuss this further if you wish.

The issue I am facing now is that some of the linux libraries are not found by the compiler. Especially: asm/rwonce.h

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How to add libraries stored on the remote target (Raspberry Pi)

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