Thanks everyone for the advice, some good ideas to keep me busy. Will try and 
look at over weekend/next week as tied up the rest of today.

I've used pyserial several times  - many thanks to Chris Liechti for that module

Hmmmmm must be loosing it, forgot about stdin/out!

I've also used CUnit before and it's nice an easy and small. Problem is I've 
only 500 bytes code space left on the micro-controller so by the time CUnit 
gone in with the various tests I'm gonna run of room. I have to keep the RS232 
driver in as well as it's the only way to talk to the controller.

Python + pyserial enables me to run the tests with the C compiled and run on 
the PC as well as compiled to run on the micro-controller. Python is a great 
environment for doing this sort of thing and, as has been mentioned, a GUI can 
be added easily (time permitting).

Thanks again all,
John
 
On 8 Nov 2013, at 15:00, Grant Edwards <invalid@invalid.invalid> wrote:

> On 2013-11-08, John Pote <johnhp...@o2.co.uk> wrote:
>> Hi all,
>> 
>> I have the task of testing some embedded 'C' code for a small
>> micro-controller. Thought it would be a good idea to test it on the
>> PC first to make sure the algorithm is correct then perhaps test it
>> on the controller via RS232 and an appropriate wrapper round the 'C'
>> functions.
>> 
>> On the PC I can use Python's unit test library module and logging to
>> create a nice and easy to use environment (I like Python). So my
>> question is how to communicate from Python to the C module on the PC.
>> What I'd like is simplicity and ease of setting up. All I can think
>> of myself is to use sockets.
> 
> Sockets are nice and simple.  Depending on what you're doing,
> stdin/stdout may be even simpler.
> 
> For the RS232 part of the problem, don't forget about pyserial:
> 
>  http://pyserial.sourceforge.net/pyserial.html
> 
>> Any ideas on how to do this would be gratefully appreciated.
>> 
>> Also as I don't have any microsoft offerings of a C compiler any
>> suggestions as to a suitable C compiler for a PC appreciated as well.
>> llvm? mingw? gcc?
> 
> I've occasionaly used mingw (which _is_ gcc), and it worked well.
> Cygwin (also gcc) works well, but it's a bit more involved.
> 
> I do all my embedded development on a Linux host.  I find Linux to be
> far more suitable for the task -- the entire Unix system basically
> evolved as a software development platform.  I've yet to figure out
> what MS-Windows is suited for other than lining Bill Gates' pockets.
> 
> Before Linux, I used Solaris/SunOS, and before that I used Unix V7.
> Everytime I've been involved in a Microsoft-hosted embedded
> development project, I just end up walking a way afterwards shaking my
> head in puzzlement.
> 
> -- 
> Grant Edwards               grant.b.edwards        Yow! I'm having a
>                                  at               tax-deductible experience!
>                              gmail.com            I need an energy crunch!!
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