Any idea how to implement serial number to each uC?(18F24J11

[Eduardo__]

Any idea how to implement a serial number to each uC?
Detail: My uC has no EEPROM (PIC18F24J11)

Is it possible to write it in some flash location while programming PIC?
I need to write a unique 32bit serial number to each PIC I program. It will be used as a MAC address.

Thanks for any ideas.
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Eduardo Guilherme Brandt

[SherpaDoug]

Check to see if your programmer can auto-increment a location as it programs. Some of the fancier ones can for just this purpose.

Dallas Semiconductor sells a serial number chip. Each chip is manufactured with a unique read only number.

Years ago I did this by writing a program to read the .S19 file, increment a location and make multiple copies.
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[Eduardo__]

I think not. I´m Using Microchip ICD2.

But thanks for IDEA.
Eduardo
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Eduardo Guilherme Brandt

[Ttelmah]

This is the 'point' of the #SERIALISE operator.
Whether ICD2 supports this, I don't know, but give it a try. Generate a file 'serials.txt', in the directory with your code, and the programmer is meant to read the number from the file, increment it, and write it back, so gives the auto increment required. :-)

Best Wishes

[Douglas Kennedy]

Another advantage to the CCS IDE and ICD-U64....not only do you get lightening speed and superior debugging but via #SERIALIZE you get a production programmer..sure it isn't a gang programmer. You can't do better (for a single chip at a time programmer) than the price performance features of a CCS U-64 programmer.

[Eduardo__]

Yes, I´m going to buy a ICD-U64 on the future for this project.

But, I would like to know whether #serialize works with the flash of the uC or only eeprom?

My uC has no eeprom.
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Eduardo Guilherme Brandt

[Ttelmah]

By default EEPROM

It'll work with your programmer if you use the CCS ICD.

However you can also use it to set a value into a CONST, which is then stored in the flash memory.

Best Wishes

[Eduardo__]

Ttelmah, so if I understood correctly, #serialize can work with uCs without eeprom(only flash).
Do you confirm it?
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Eduardo Guilherme Brandt

[jeremiah]

If you look at the #serialize section of the compiler manual you will see you have two sets of options to pick from:

Flash:
id=<const variable name>

EEPROM
dataee=<address>,binary=<num bytes>

You can use string=<num bytes> instead of binary, but I am not familiar with what that does differently. If you don't want to use EEPROM or have a chip without it, then use the flash option.

[Eduardo__]

Pretty good! Thank you a lot!

Solved!!
Regards
Eduardo
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Eduardo Guilherme Brandt