Mauricio 

Could you possibly compile all source files except the one that the
customer is to modify and save it as a library file possibly.   Then
when the customer modifies the single source file you send him, he can
compile 
The whole thing by using the source file he recently modified plus the
rest of the application you provided him 
As a library file.  

Just a thought.  I don't know if this is too much trouble for the
customer or not, but I believe it would work.


	
Regards,

	
Jim




-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
Of Mauricio Jancic
Sent: Friday, March 09, 2007 1:19 PM
To: 'Microcontroller discussion list - Public.'
Subject: [PIC] Protecting firmware intellectual property

Hi,
	I need to release a firmware to a customer, and he must be
allowed to modify one of the source files (writen in C).
	I don't want to give him the whole code, but I would like to
give him a (unknown format) file + the user modificable routine.
	Anyone can give me a pointer on how to accomplish this?

Regards,

Mauricio Jancic
Janso Desarrollos
Microchip Certified Consultant
www.janso.com.ar
info@janso.com.ar
(54) 11-4502-2983
 

> -----Original Message-----
> From: piclist-bounces@mit.edu
> [mailto:piclist-bounces@mit.edu] On Behalf Of peter green
> Sent: Wednesday, March 07, 2007 15:55
> To: Microcontroller discussion list - Public.
> Subject: RE: [PIC] 16F946 AVdd / AVss
> 
> 
> > It looks PIC16F946 has separately supplies pins for AD.
> > If this is true, AVss should be connected directly to the
> supply (in
> > the same point Vss is connected). Avdd could be supplied from a 
> > separate clean  supply or from an LC filter connected
> directly to Vdd. 
> > If the environement is clean, AVdd and Vdd could be
> supplied together
> > from the same power supply.
> you could just tie them together but doing so would not be the best 
> thing from a noise perspective.
> 
> if you want best performance the analog and digital grounds in your 
> cuircuit should be connected together at one point only and there 
> should be a filter between the analog and digital power supplies.
> 
> pic adcs are iirc only 10 bit though anyway so it may be that this 
> doesn't gain you much if you already have good decoupling on the power

> supply
> 
> 
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