PIC12F510 and PORT_B_PULLUPS()

[guy]

I'm trying to turn on the pull-ups on a PIC12F510 - I copy the command from the 12F510.H file, but the compiler doesn't recognize the command:
PORT_B_PULLUPS(TRUE);
I get the response:
Undefined identifier -- PORT_B_PULLUPS
(I also tried PORT_A_PULLUPS...)

That this is a bug, right?
I use compiler version 3.236

Thanks.

[drh]

"TRUE" is what it dosen't like. Read the 12F510 header file again.
_________________
David

[frequentguest]

Change the commands to lowercase. CCS functions are generally in all lowercase characters.

[guy]

TRUE should be ok.
I also tried 1, and also to use a value for individual pullups (although the 12F510 doesn't support it) and none works.
The header file doesn't give an example, and according to the help, TRUE is ok.
More ideas, or an example how to use the function?

[rnielsen]

The compiler help file states that you should use setup_counters() to set the weak pull-ups. I've never used them on the 12F series PIC's so I can't say if that's how it should be done. Possibly, instead of using the built-in command you might need to set a register manually.

Ronald

[Ttelmah]

This is one of those lovely ones, where you can understand CCS getting it wrong. If you look at the data sheet for the chip family, the 16F506, has a 'port B pullup' bit. However the 12F510, instead has a 'general purpose pullup' bit. Unfortunately whoever was scanning the data sheet to implement the required functions, failed to see this, so has assumed the chip does not support 'pullups'.
As another poster has said, on this chip, the bit is accessed through the same configuration register as the timer prescaler. So:

[guy]

Horribly - it works!
Thanks Ttelmah
It also means that whenever someone uses SETUP_TIMER_0 (to setup timer 0) it turns on the pullups by default!

I hope they already fixed this in newer versions. BIG BUG. BIG NO-NO.