pic16c8452 and port a

[Delene Mulley]

Please can someone help me I'm more than pulling my hair out.
I like just about everyone else, was using the f877 and have changed to the 18c452.
I use porta - a3 to calculate a value. If the line is high I add a value. This works fine on my f877 but i can't get the 452 to recognise the changes on the ports.

My code is
if (bit_tes(porta, 0))
total = total + 1;

I have also tried
if (input(pin_a0))
total = total + 1;

without any joy.

What am I missing???
___________________________
This message was ported from CCS's old forum
Original Post ID: 1191

[Eric Belanger]

Hi,

I'm not sure if this may help, but did you disable the A/D converter? If not the default uses is analog input and not Digital IO.

// A/D Disable, PORT A I/Os Numeriques seulement
SETUP_ADC( ADC_OFF );
SETUP_ADC_PORTS( NO_ANALOGS );

Eric

:=Please can someone help me I'm more than pulling my hair out.
:=I like just about everyone else, was using the f877 and have changed to the 18c452.
:=I use porta - a3 to calculate a value. If the line is high I add a value. This works fine on my f877 but i can't get the 452 to recognise the changes on the ports.
:=
:=My code is
:=if (bit_tes(porta, 0))
:= total = total + 1;
:=
:=I have also tried
:=if (input(pin_a0))
:= total = total + 1;
:=
:=without any joy.
:=
:=What am I missing???
___________________________
This message was ported from CCS's old forum
Original Post ID: 1200

[Delene Mulley]

Eric you are a genuis

THANK YOU

:=Hi,
:=
:=I'm not sure if this may help, but did you disable the A/D converter? If not the default uses is analog input and not Digital IO.
:=
:= // A/D Disable, PORT A I/Os Numeriques seulement
:= SETUP_ADC( ADC_OFF );
:= SETUP_ADC_PORTS( NO_ANALOGS );
:=
:= Eric
:=
:=:=Please can someone help me I'm more than pulling my hair out.
:=:=I like just about everyone else, was using the f877 and have changed to the 18c452.
:=:=I use porta - a3 to calculate a value. If the line is high I add a value. This works fine on my f877 but i can't get the 452 to recognise the changes on the ports.
:=:=
:=:=My code is
:=:=if (bit_tes(porta, 0))
:=:= total = total + 1;
:=:=
:=:=I have also tried
:=:=if (input(pin_a0))
:=:= total = total + 1;
:=:=
:=:=without any joy.
:=:=
:=:=What am I missing???
___________________________
This message was ported from CCS's old forum
Original Post ID: 1220