read tris values

[guest]

Hi all.
Is it possible to "read" the tris register values of a port to determine
what pins have bees set to Inputs and what are outputs , from within your code.I can create a variable to keep track of what the port has been set to , but was wondering if there is not an easier way.
Cheers
Rob

[Ttelmah]

Just declare a byte to point to the TRIS register. So for the 18F chips:

#byte TRISA = 0xF92

Then access this when required.
Remember though, that if you are using 'standard_io', the value will be overridden by the compiler whenever the I/O register is accessed.

Best Wishes

[guest]

Thanks.
Obvious , now you tell me how it's done.
Cheers
Rob