Re: [avr-chat] Serial Numbers with avrdude (or other?)

[Andy Warner]

David Kelly wrote:
> I can see the need in the near future to embed a sequential serial  
> number in either EEPROM or FLASH. Avrdude appears to be a good choice  
> but doesn't list an explicit option to do this. It does have a means  
> of counting erase cycles which is close but not quite what I'm after.
> 
> The -U option might work without having to generate a hex or srec  
> file for each and every serial number, but in the "m" immediate mode  
> I don't see any means of specifying an address?

Here is an approach I use, consisting of two parts:

1. A perl script that formats my eeprom area (in my case this
   was the _entire_ eeprom, consisting of a serial #, some default
   parameter values and some manufacturing data (date, time, host etc))

   This script uses pack to directly format a binary record of the
   required size (after suitable argument cooking.) Serial # is
   extracted directly from MySQL database, which is then updated
   with manufacturing data.

2. pipe that directly to avrdude using this command:

        -U eeprom:w:-:r

Works great, lasts a long time.

If I wanted to do something other than write from the beginning of
the eeprom, I'd use objcopy or a similar tool to locate the
binary data structure somewhere other than 0 and let avrdude
do it's thing.
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Andy Warner             Voice: (612) 801-8549   Fax: (208) 575-5634