OPTION_REG = $7f syntax error

[skimask]

Hi,

ver 2.46, MPASM 5.1

I think it is an problem with the 18F4431. I can compile code for the 16F877a with both MPASM and the default compiler and it works just fine. I have tried to compile a simple program with OPTION_REG = 1 and it gives me a syntax error.

thanks

t

Download the datasheet for the 18F4431 and do a search for the phrase 'OPTION_REG', then do a search for the word OPTION.
Get back to me on what you find...

[HenrikOlsson]

Hi,

I think it is an problem with the 18F4431.

OK, that explains it.... The 18F4431 doesn't have an OPTION_REG. What is it you are trying to do by setting it? You said that the it did work a day or so ago but never that you changed target device....

/Henrik Olsson.

[ttease]

Hi,

Thanks and I finally get it. It did work on the 16f877a but I have to remember, each PIC device has its own little kingdom of parameter and register. I mistakenly figured this was a common, like TRIS and PORT, parameter among all PIC devices (PortB pull-ups sounds common).

I started with the 16f877a and that has become my 'normalized register' set.

I'll try to pay more attention to the datasheets in the future.

thanks

t