spbrgh on 18f2680

[lewiseley]

hello guys.
has anyone noticed that the spbrgh register is non existent on the 18f2680.

i need 1200 baud on the uart on a 8mhz internal clock + pll ( 32 mhz).
and i now find spbrgh is unavailable, so i cant get to 1200 baud.

any ideas ????

[treitmey]

I think its 0xFB0 spec pg 72
enable is baudcon bit 3 spec pg 232

[lewiseley]

yes i have baudcon bit 3 set.
but it seems to be inaccessible, from icd2 when you view spec func registers
it has '--' in the place of spbrgh.

[treitmey]

So you mean to say that the ICD doesn't show the register value where you expect to find it. I miss-understood you.

It could be the ICD or the chip def. Are you using 3.249?

I don't have one of these chips. I can't help more.
I figure you could edit a chip to have this value where you want to see it.

Or maybe you could find a simular chip(with this reg in correct spot) and compile it as that. The icd will complain a little(("i didn't find a 16F877)) but you can force it to load.

Does anyone have this chip?

[lewiseley]

thanks treitmey

it turns out to be an icd2 problem, it is there and accessible, but icd2
seems to think its a restricted memory location.
and will not display it.