Re: [Sdcc-user] PIC 14 Config Word

[Raphael N. <RN...@we...>]

Ok, I just fixed this issue in SDCC r4119. Config words now work 
(nearly) as previously: You define a variable at a config word
location and initialize it with the desired value, e.g. using

unsigned int __at(0x2007) foo = 0x0815;

Different from before the modifications, config words need not be
defined in the main()-file but may be defined anywhere. Behaviour
on duplicate definition in multiple source files is "undefined" ;-).

Sorry for the confusion,
Raphael

> Hi Simon,
> 
> 
>>>I'm trying to port some sdcc code that used to build fine on sdcc 
>>>(2005 versions).  It's a build for the 16F628.  One problem I'm having 
>>>is changing the config word.
> 
> 
> Hmm, sorry. I broke this (accidentally) when I added support for extern
> declared SFRs. I am already trying to fix it to make it work as
> previously.
> 
> 
>>I notice that if I declare something like this:
>>
>>volatile unsigned int __at(0x2007) CONFIG;
>>
>>And then assign to CONFIG somewhere inside main() then it seems to do 
>>the right thing.  Doing this inside code seems strange to me, but it 
>>works okay.
> 
> 
> Glad you found a workaround; still this is a bug that needs to be fixed.
> The "old way" is the recommended one as soon it works again.