[Discuss-gnuradio] OOT Module & Epiphany SDK (Parallella Board)

[Ivan Santa]

Hi list.

I started the journey of trying to write an OOT module containing functions of the Epiphany SDK.  So over my parallella board I compiled GNU Radio and I created an OOT module called Epiphany and then I created a block called toggle, with the idea of turn on and off a led from an epiphany core.

gr_modtool newmod epiphany

cd gr_epiphany

gr_modtool add -t sync toggle_led

Then I did a few changes on toggle_impl.cc (To start, I only added the function e_init(NULL))

.....

#include "toggle_impl.h"

#include <e-hal.h>

#include <e-loader.h>

namespace gr {

namespace epiphany {

.....

      : gr::sync_block("toggle",

              gr::io_signature::make(1, 1, sizeof(int)),

              gr::io_signature::make(0, 0, 0))

....

        const int *in = (const int *) input_items[0];

        // Do <+signal processing+>

        e_platform_t platform;

        e_epiphany_t dev;

        e_mem_t emem;

        char emsg[1024];

        unsigned int row, col;

        unsigned int data, led_state;

        int i;

        e_init(NULL);

....

Then I added a line in the CMakeLists.txt in the lib folder:

...

include_directories(/opt/adapteva/esdk.2015.1/tools/host.armv7l/include)

add_executable(test-epiphany ${test_epiphany_sources})

...

I put almost all the sources and headers of eSDK on the module folders.

When I compile I don't get any error, but when I run the top block I obtain an AttributeError: 'module' object has no attribute.

If I run it on python, I observe that SWIG didn't wrap all the code: 

import epiphany

>>> dir(epiphany)

['__builtins__', '__doc__', '__file__', '__name__', '__package__', '__path__']

If I comment the line e_init(NULL); and recompile I obtain:

>>> dir(epiphany)

['__builtins__', '__doc__', '__file__', '__name__', '__package__', '__path__', 'epiphany_swig', 'high_res_timer_epoch', 'high_res_timer_now', 'high_res_timer_now_perfmon', 'high_res_timer_tps', 'toggle', 'toggle_make', 'toggle_sptr', 'toggle_sptr_swigregister', 'toggle_swigregister']

It is logic because in this case I didn't use real functions of e-hal, only objects.

So, additionally I changed the file epiphany_swig.i trying to understand the functionality of SWIG (inventing):

%{

#include "epiphany/toggle.h"

#include <e-hal.h>

#include <e-loader.h>

%}

%include "epiphany/toggle.h"

%include <e-hal.h>

%include <e-loader.h>

GR_SWIG_BLOCK_MAGIC2(epiphany, toggle);

GR_SWIG_BLOCK_MAGIC2(epiphany, e-hal);

GR_SWIG_BLOCK_MAGIC2(epiphany, e-loader);

But I got an epiphany_swig.i:22: Error: Syntax error in input(1).

So here I'm stucked and I'm not a GNU Radio expert, and I know that trying to put external functions in an OOT block is not easy for a newbie.

Aditional information:

Linux parallella 3.14.12-parallella-xilinx-g40a90c3 #1 SMP PREEMPT Fri Jan 23 22:01:51 CET 2015 armv7l armv7l armv7l GNU/Linux

GNU Radio  3.7.8

swig 2.0.11-1ubuntu2 armhf

eSDK 2015.1

Many thanks in advance for any information, or suggestion.

Best Regards.