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12F675 configure ports

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peterl

Joined: 09 Oct 2009
Posts: 13
Location: SF,BG

12F675 configure ports

Posted: Fri Oct 09, 2009 2:28 pm

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hi guys,
I use PIC-C compiler version 4.074. I want to make PIN_A0, PIN_A2 as input and PIN_A1 as output. To enable PULLUPS resistor of PIN_A0, PIN_A2, I wrote this :

Code:

#include "D:\Dimer V.2\main.h"

void main()
{
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_comparator(NC_NC);
setup_vref(FALSE);
set_tris_A(0b10110000);
port_a_pullups(TRUE);
}

Am I right? Because I tried it, but pullups resistor does not work. My second question is: if I use INPUT() function in this way is it necessary to use set_tris_x to configure which pin is input/output?
Thank's a lot !

PCM programmer

Joined: 06 Sep 2003
Posts: 21708


Posted: Fri Oct 09, 2009 3:35 pm

On this PIC (and others like it), port_a_pullups() does not use TRUE/FALSE as the parameter. It uses a bit mask. Example: http://www.ccsinfo.com/forum/viewtopic.php?t=40194&start=1

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