Reading Device ID

EdWaugh · Joined: 07 Dec 2004 Posts: 127 Location: Southampton, UK

Hi guys,

I'm having a problem to which I suspect the solution is very simple. I'd like to read the device IDs of the part I'm using and I was trying this:

#byte device_id1 = 0x3FFFFE
#byte device_id2 = 0x3FFFFF

And then reading the byte pointed at by device_idX. However I always get zero. I got the register locations from the datasheet but they seem wrong as they are more than 16bit. Can anyone point me in the right direction? I'm using the 18f6723.

cheers

ed

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

The #byte method only works with RAM, not flash.
See this thread for sample code to read the Device ID:
http://www.ccsinfo.com/forum/viewtopic.php?t=20257

EdWaugh · Joined: 07 Dec 2004 Posts: 127 Location: Southampton, UK

Cheers, that works great. I tried searching the forum for device id but got 4500 hits. I'll have to practice!

thanks

ed