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Groups > comp.arch.embedded > #24536

Re: dsPIC serial number

From Les Cargill <lcargill99@comcast.com>
Newsgroups comp.arch.embedded
Subject Re: dsPIC serial number
Date 2016-07-03 12:46 -0500
Organization A noiseless patient Spider
Message-ID <nlbiq2$e7v$1@dont-email.me> (permalink)
References <nlaqnb$v9d$1@dont-email.me>

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Syd Rumpo wrote:
> Hi
>
> I want to put a serial number into a dsPIC - there's four bytes of user
> space in the flash which would be ideal.
>
> Is there any reasonably easy way of stopping this from being changed
> when new software is programmed using a PicKit programmer?  I know I
> could read it and re-write it, but I want something which moderately
> tech-savvy customers can do.
>
> Cheers


This has a table which shows the erase and write blocks for a dsPIC.

http://ww1.microchip.com/downloads/en/DeviceDoc/70152H.pdf

I dunno whether a PicKit can pick ( hah! ) and choose which blocks it 
reprograms or not. The single examples using an ICD3 I've seen used did 
not but that was on a PIC24 and on a PIC32. Serial numbers were managed 
with a barcode on the case, and there were Noi User Serviceable Parts 
Inside - upgrades were done only in an RMR facility.

-- 
Les Cargill

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Thread

dsPIC serial number Syd Rumpo <usenet@nononono.co.uk> - 2016-07-03 11:51 +0100
  Re: dsPIC serial number Syd Rumpo <usenet@nononono.co.uk> - 2016-07-03 12:01 +0100
  Re: dsPIC serial number Don Y <blockedofcourse@foo.invalid> - 2016-07-03 04:14 -0700
    Re: dsPIC serial number Syd Rumpo <usenet@nononono.co.uk> - 2016-07-03 12:46 +0100
      Re: dsPIC serial number Don Y <blockedofcourse@foo.invalid> - 2016-07-03 05:24 -0700
        Re: dsPIC serial number Don Y <blockedofcourse@foo.invalid> - 2016-07-03 05:28 -0700
          Re: dsPIC serial number Syd Rumpo <usenet@nononono.co.uk> - 2016-07-03 16:13 +0100
            Re: dsPIC serial number Don Y <blockedofcourse@foo.invalid> - 2016-07-05 17:35 -0700
              Re: dsPIC serial number Syd Rumpo <usenet@nononono.co.uk> - 2016-07-06 11:06 +0100
                Re: dsPIC serial number Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2016-07-06 13:44 +0300
                Re: dsPIC serial number Syd Rumpo <usenet@nononono.co.uk> - 2016-07-06 13:16 +0100
                Re: dsPIC serial number Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2016-07-06 16:36 +0300
                Re: dsPIC serial number Richard Damon <Richard@Damon-Family.org> - 2016-07-16 21:50 -0400
  Re: dsPIC serial number Paul Rubin <no.email@nospam.invalid> - 2016-07-03 09:46 -0700
  Re: dsPIC serial number Les Cargill <lcargill99@comcast.com> - 2016-07-03 12:46 -0500
    Re: dsPIC serial number Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2016-07-03 21:04 +0300

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