Hi Marco,
In this case, you would not use the linker to link codec2 to to the rest of
your software. Codec2 would be uploaded to a fixed address and would have a
jump table at the start of all of the functions that you use within it.
Your proprietary software would simply access codec2 through the jump
table. The available space should be sufficient to allow codec2 to be
compiled with GCC rather than IAR, and to allow some room for improvements
and bug fixes, perhaps a 20% overhead would be sufficient.
I don't know what your proposed interface for reflashing is, if it's USB
that is simple. We also have cheap devices such as the Bus Pirate which can
handle JTAG.
It would also be important not to blow any write fuses in the
microprocessor that would prevent update of codec2 later on.
I'm sorry that this is complicated, the software is free but that doesn't
mean it's a gift.
Thanks
Bruce
On Mon, Jan 15, 2018, 08:56 Marko Milutinovic <
mmilutino...@blacklinesafety.com> wrote:
> Hi Bruce and Si,
>
>
>
> Thank you for the responses. I’ll take this info back and discuss with my
> group.
>
>
>
> Another caveat is that we use a proprietary tool chain for compilation and
> linking (IAR). Without the end user having these tools it would be almost
> impossible for them to re-link against a newer version of the library. In
> our FW it would be impossible to replace the library unless an entire FW
> update was performed.
>
>
>
> Cheers,
>
> Marko
>
> *From:* Bruce Perens [mailto:br...@perens.com]
> *Sent:* Friday, January 12, 2018 7:31 PM
> *To:* freetel-codec2@lists.sourceforge.net
> *Subject:* Re: [Freetel-codec2] Licensing question
>
>
>
> Hi Marko, sorry to do this from my phone but I won't be at my desk until
> tomorrow. Your employer is not required to distribute the binary program of
> your proprietary code but you must make it possible for the end-user to
> install a replacement of codec 2 when it's upgraded. Other manufacturers
> presently do this flexradio is an example. I can go over with you further
> on the phone what would you be compliant with the license and what
> wouldn't, no charge for the call.
>
> Thanks
>
> Bruce
>
>
>
> On Fri, Jan 12, 2018, 16:57 Marko Milutinovic <
> mmilutino...@blacklinesafety.com> wrote:
>
> Hello,
>
>
>
> My company has been testing out the CODEC2 library for potential use. Our
> application of the CODEC2 library would be in an embedded system that is
> used for lone worker safety.
>
>
>
> Going over the LGPL 2.1 license one of the clauses is potentially
> problematic for us. Sections 5 and 6 require that we provide a way for an
> end user to be able to recreate the final executable using a modified
> version of the library if they want to. I realize that we don’t have to
> provide the source code itself but my company would never allow the release
> of our binary files either. I’m not 100% clear if our final firmware
> compilation (SREC or HEX) qualifies as an executable file as it can’t run
> on a generic OS.
>
>
>
> Just wondering if anyone can comment on whether or not just linking the
> library (with 0 modifications) statically with our firmware would require
> us to release binary objects of our main firmware?
>
>
>
> Thanks,
>
> Marko
>
>
>
>
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