How can I protect a part of a source code ?

markuster

I have developed a Source code for BS2.

The source code is simple , move some servos
and the source turns on and off an speaker alarm from one minute
to five minutes just changing a Pause.


I will send this Source code to a frind.
My friend doesn't know anything about Basic Stamps
and I am afraid she could modify all the Source code.

My question is how can I protect the souce code and show
the Pause only , or blocked some Source lines .

Or show a part of the source code.

( I don't know)


Thanks , Mark
PS: Generate a single executable is not a solution.

pwillard

Migrate your application to an SX/28 maybe?

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There's nothing like a new idea and a warm soldering iron.

Jonathan

It sounds like you are not worried about her stealing your code, just modifying it so it won't work, right?

If this is the case, she can always re-load the original code, or you can resend it. As long as she saves the code with a different name, there should be no problem.

If you are worried about code protection from theft, it is impossible to *completely* protect the program. But, if your friend can't even modify the code corecctly, she sure won't be able to steal it. If this is the case, just send her a pre-programmed Stamp.

Jonathan

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www.madlabs.info - Home of the Hydrogen Fuel Cell Robot

LilDi

You could also write protect the file in Windows

kb2hap

What about· "File->Generate Object Code" in the PBasic software?

She wont be able to see any of the source and if you really want here to be able to change

timers an such just set some serin/debugin commands and have her enter them through a terminal viewer.


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DTQ

allanlane5

+1 to the "File->Generate Object Code".

Tracy Allen

+2 to the "File->Generate Object Code". You say thought that a single executable is not a solution. Why not? You can write your program to include a menu that would allow your friend to modify certain parameters, like the Pause.

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Tracy Allen
www.emesystems.com

markuster

Thanks Tracy and DTQ


I would like to use a menu and
Generate Object Code
but I how can I add a menu ?

Do you know where can I find this information
or an example ?

Thanks Mark.

Tracy Allen

MArk, Here is a sample menu. It runs when the program starts up, so if the user has a terminal attached, the UI the interaction can take place. There is a timeout on the SERIN command so that the program won't lock up if no terminal is attached or if the user simply walks away. The program simpy continues after 30 seconds into the main program, using the existing pause parameter read from the eeprom. Here there are only two active choices but there is a template for additional choices.

pauseLoc  DATA 1000  ' default pause of 1 second is stored in eeprom as DATA
choice VAR byte
zzz VAR Word   ' this variable will hold the active pause value
wy VAR Word

top:
 ' intitialization goes here
menu:
  SEROUT 16, $54, [noparse][[/noparse] CR, "1)set_PAUSE   9)run_Program",CR,">"]
  SERIN 16,$54, 30000, main, [noparse][[/noparse] dec1 choice]
  ON choice GOTO menu, set_Pause, menu, menu, menu, menu, menu, menu, menu, main
  ' choices 1 & 9 are implemented

main:
  READ pauseLoc, WORD zzz   ' fetch the pause value, here, or read it in later when needed
  ' rest of program goes here.
  END

set_Pause:
  READ pauseLoc, WORD zzz
  SEROUT 16,$54, [noparse][[/noparse] CR,"Pause value=", DEC wx ]
  SEROUT 16,$54, [noparse][[/noparse] CR,"enter new Pause value, 0 to leave as is> "]
  SERIN 16,$54,30000, menu, [noparse][[/noparse]DEC wy]
  IF wy>0 AND wy<>zzz THEN WRITE pauseLoc, WORD wy
  GOTO menu

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Tracy Allen
www.emesystems.com

Post Edited (Tracy Allen) : 9/14/2007 6:02:56 AM GMT

markuster

Thanks Tracy ,


Mark.