Serial number written to hardware?

I would like to know, if the unique serial number of each Raspi is written into some registers on the Board? If so, how could I read this information out using a C-program?

[dom]

Try:
cat /proc/cpuinfo

Code: Select all

Processor   : ARMv6-compatible processor rev 7 (v6l)
BogoMIPS   : 697.95
Features   : swp half thumb fastmult vfp edsp java tls
CPU implementer   : 0x41
CPU architecture: 7
CPU variant   : 0x0
CPU part   : 0xb76
CPU revision   : 7

Hardware   : BCM2708
Revision   : 0002
Serial      : 000000000000000d

Your serial should be different.

Thx for your help. Yes this seems to be what I'm looking for.
I'm sorta newby to Linux so I gotta ask: How do I put this into C-code? This appears to be some command for the console.

Is it ok to just read the file directly from the SD-card without using any console-commands?


I wonder if there are differences between Farnell and Element 14 boards?

Thx for your help. Yes this seems to be what I'm looking for.
I'm sorta newby to Linux so I gotta ask: How do I put this into C-code? This appears to be some command for the console.


I wonder if there are differences between Farnell and Element 14 boards?

Hi

If I was doing this then I would read the file looking for the relevant tag such as Serial and read the value.

Cheers

Paul

Thx for your help. Yes this seems to be what I'm looking for.
I'm sorta newby to Linux so I gotta ask: How do I put this into C-code? This appears to be some command for the console.


I wonder if there are differences between Farnell and Element 14 boards?

Hi

If I was doing this then I would read the file looking for the relevant tag such as Serial and read the value.

Cheers

Paul

Yes this was my intention. I just didn't know that this "cat" command actually just reads out some file from the harddrive until I just tried it in a virtual machine on my PC.

Thanks alot for your help guys!

the /proc/ directory is not on the HD [more accurately the SD card] it is a device and can be read as a file
actually in linux [and unix] everything can be considered as a file and all you need is read / write access to the file for manipulation [YMMV]
...

so you just use the standard IO libraries to read the file

There's more discussion about serial numbers here: viewtopic.php?f=29&t=8985