External Interrupt in a pin different from RB0

[aeroboy]

Hello,

I am using a 16f877A, when you use an external interrupt you write:

#int_ext
External_Interrupt(){}

Now, that is for PORTB pin RB0, it is possible to define an external interrupt for any pin in PORTB - pins RB1 to RB7?

Thanks.
--Luis

[PCM programmer]

Pins B4-B7 can be used. See this CCS example:

[aeroboy]

Thanks,

Now I have another question, you can define a variable to use like:

unsigned char VALUE;

Can I access the individual bits in this variable?, something like

PIN_VALUE1

Obviously this is not a PIN but maybe there is a way to access the bits.

--Luis

[PCM programmer]

If you want a structure of bit variables (int1), see Mark's example:
http://www.ccsinfo.com/forum/viewtopic.php?t=20186
His example allows you to access individual bits in hardware registers.
That's why he uses the #locate directive after each structure.
If you just want to create a structure of bits in a normal variable, then
you don't need the #locate directive.

[aeroboy]

Thanks,

You mean I have to do this:

[PCM programmer]

Yes, that's correct.

You can also clear the entire structure (all bits) like this:

[aeroboy]

Thanks a lot, that's very useful.

--Luis