install MRAA

[JOvie1]

Hello, I have an intel galileo gen 1 with a debian SO because I needed SDL library. How can I install MRAA API? I need mraa to use the pinout.

Thanks.

[idata]

Hello julian403,

If you are not using Yocto, you should build MRAA by following the instructions found in http://iotdk.intel.com/docs/master/mraa/building.html http://iotdk.intel.com/docs/master/mraa/building.html. If you were using Yocto it would be a lot simpler, you could simply set up the repo and download the packages as I explain in /message/393752# 393752 https://communities.intel.com/message/393752# 393752. -Peter.

[asss]

Hi,

also need to note that a debian image must have Kernel drivers for Galileo Gen1 board to control pins.

Kernel drivers are required for MRAA.

BR,

xbolshe

[JOvie1]

Well, I'm going to use Yocto but the problem with it is that I can't use SDL API. Because I need to use Sound Card's ADC and I have problem with Alsa. For example, in Intel System Studio Iot I wrote:

[code]

# include "mraa.hpp"

# include

# include

# include

# include

# include

# define PCM_DEVICE "default"

int main()

{

int rc;

snd_pcm_t *handle;

snd_pcm_hw_params_t *params;

unsigned int val, val2;

int dir;

snd_pcm_uframes_t frames;

/* Open PCM device for playback. */

rc = snd_pcm_open(&handle, "default",

SND_PCM_STREAM_PLAYBACK, 0);

[/code]

if you see, I included asoundlib.h correctly because I have not problem with the sentences:

[code]

snd_pcm_t *handle;

snd_pcm_hw_params_t *params;

snd_pcm_uframes_t frames;

[/code]

But the ide give me the next message to the sentence:

[code]

snd_pcm_open(&handle, "default",

SND_PCM_STREAM_PLAYBACK, 0);

[/code]

where Eclipse trhows: undefined reference to snd_pcm_open();

I went in Galileo with ssh, and I checks /usr/include/alsa an is all .h necesary and it's included in asoundlib.h as you can see in asounlib.h

then I go to pcm.h And there is defined snd_pcm_open()

Why can I do? Can I install SDL in Yocto? How?

I sent this question to mailto:jessica.gomez.hernandez@intel.com jessica.gomez.hernandez@intel.com and she sent this information to Brendan (that's what she said, sayin he is the mraa expert)

[asss]

Hi,

It seems that your problem does not related with MRAA.

Have you tried to change this line

# include

like shown below?

# include

What is Eclipse message in this case?

BR,

xbolshe

[idata]

I agree with @xbolshe and you can also try to install SDL from source from https://www.libsdl.org/download-2.0.php. You can see their documentation in http://wiki.libsdl.org/FrontPage including how to install it ( http://wiki.libsdl.org/Installation).

And in case you have issues installing this package you can contact them in http://forums.libsdl.org/. -Peter.

[JOvie1]

I did the change to [code]# include [/code] but it still don't work.

[quote]What is Eclipse message in this case?[/quote]

undefined reference to snd_pcm_open()

That's the eclipse message but as I said, the library is correctly included because there is not problem with the definition of [code]snd_pcm_t *handle[/code] and snd_pcm_t is a variable types defined in asoundlib.h

[asss]

julian403

Have you added the SDL library in linker options?

https://www.eclipse.org/forums/index.php/t/238028/ Eclipse Community Forums: C / C++ IDE (CDT) " How do I include easily new libraries

It may be a problem with libSDL, so you may try to add libasound.

BTW, intel_corp

"i586-poky-linux" has no libSDL

"quark-wrs-linux" has libSDL

It is strange. I use "iss-iot-win_03-24-16.7z".

BR,

xbolshe