[Gambas-user] gambase and modbus

[Petit Eric]

http://en.wikipedia.org/wiki/Modbus
http://fr.wikipedia.org/wiki/Modbus
http://www.modbus.org/
http://www.modbus.org/tech.php
http://www.modbus.org/docs/Modbus_over_serial_line_V1_02.pdf
http://www.modbus.org/docs/Modbus_Application_Protocol_V1_1b.pdf
http://www.modbus.org/docs/PI_MBUS_300.pdf
http://www.modbus.org/docs/Modbus_Messaging_Implementation_Guide_V1_0b.pdf
http://www.modbus.org/docs/Object_Messaging_Protocol_ExtensionsVers1.1.doc

That's all pdf you need :-)

2009/10/3 Doriano Blengino <doriano.blengino at ...1909...>:
> Jean-Yves F. Barbier ha scritto:
>> Werner a écrit :
>> ...
>>
>>> Depends on what you use it for, it's not free for commercial purposes.
>>>
>>> You have propably seen
>>> http://copyleft.free.fr/wordpress/index.php/libmodbus/
>>>
>>
>> Thanks Werner, this look interesting.
>>
>> But AFAIK, GPLv3 & LGPLv3 don't forbid commercial use as far as you provide
>> a meaning to get all sources to the client (for short, it's better to supply
>> compiled AND source:) and retain the copyleft and credits to original creators.
>>
>> JY
>>
> I wrote in C, some time ago, an embedded application using modbus on RS-422.
> It is not a difficult matter, at least the part I was interested in - my
> device acted as a server, and a MMI (a touch screen LCD panel) was
> attached to it.
> If you are interested in, I can send some C source code and perhaps the
> official documentation I used to write it (available for free in the
> Internet). I don't remember if my implementation was "full" or had only
> the relevant part, but it was simple and short enough to be translated
> easily to gambas; there was only the CRC-32 (or whatever checksum) which
> was a little CPU intensive, but I suppose an i386 computer has far more
> power than a poor embedded microcontroller...
> Unfortunately this material is in the computers at work, I have not it
> here at home, but the next monday I can fetch them.
>
> Regards,
>
> --
> Doriano Blengino
>
> "Listen twice before you speak.
> This is why we have two ears, but only one mouth."
>
>
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-- 
Cordially.

Small Eric Quotations of the days:
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I have no special talents. I am only passionately curious