K22 ANSEL query

[Francis]

I've been 'away' doing all hardware for a couple of years and have returned to SF. I have discovered I have gone rusty.

Setup: 18F45K22 sitting on a Mikroelektronika EasyPICV7 using their latest programmer.
I have updated to latest SF (thanks David).

My question:-
If I want a 'mixture' of Analogue and Digital inputs on a port (say PORTB) do I have to use the write_sfr() Macro as used in the SetDigitalIO routine?
And call it when setting up ANSEL?

So, in my code, instead of:
ANSELB = $F0 (a random example)
I'd use...
ADCByte=$F0
write_sfr(ANSELB, ADCByte) // the 'write_sfr()' routine would be above somewhere in my code.


Or do I simply Include "SetdigitalIO.bas" and call the Macro from my code?
Or something totally different?
I'm not sure of the proper way of doing this, so I'd appreciate advice.


Thanks.

[Jerry Messina]

You only need to use the 'write_sfr' macro if you're using the SE version compiler. The full version inserts the proper bank select instructions, so you can directly access the ANSELx registers...

ANSELB = $F0

If you're using the SE version, then here's an example of how to use SetDigitalIO and the macro

Code: Select all

device = 18F45K22

// option statement required for setdigitalio V1.6 and SE version
#option SWORDFISH_SE = true
include "setdigitalio.bas"

dim adcbyte as byte

// if using full version, then you can just set register directly
'ANSELB = $55

// if using SE version (no bank instructions), then you need the macro
// you can set the value using a constant...
write_sfr(ANSELB, $55)

// or by using a variable...
adcbyte = $55
write_sfr(ANSELB, adcbyte)

Make sure you update SetDigitalIO to the latest (v1.7): http://www.sfcompiler.co.uk/wiki/pmwiki ... tDigitalIO

[Francis]

Thanks Jerry, yes I use full version.

And I've downloaded V1.7 as you suggested ... and put it in the library.

I appreciate that.
All is happy now.

Francis.