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12F683 PIN_A3

 
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mmprestine



Joined: 13 Jan 2004
Posts: 29
Location: Green Bay, Wisconsin

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12F683 PIN_A3
PostPosted: Thu Oct 18, 2007 9:53 am     Reply with quote
I am looking to use PIN_A3 on a 12f683 as an output and seem to be missing somthing in the setup. When I compile the following code and run it in the MPLAB sim it never toggles. I have searched the forum and tried serval things with the register setup but to no prevail the same thing in the end. Any thoughts?

compiler version 3.249

Code:

#include <12F683.h>
#device adc=8

#FUSES NOWDT      //No Watch Dog Timer
#FUSES NOCPD      //No EE protection
#FUSES NOPROTECT   //Code not protected from reading
#FUSES NOMCLR      //Master Clear pin used for I/O
#FUSES NOPUT      //No Power Up Timer
#FUSES INTRC_IO      //Internal RC Osc, no CLKOUT
#FUSES NOBROWNOUT   //No brownout reset
#FUSES NOIESO      //Internal External Switch Over mode disabled
#FUSES NOFCMEN   //Fail-safe clock monitor disabled

#use delay(clock=8000000)

void main()
{

   setup_adc_ports(NO_ANALOGS|VSS_VDD);
   setup_adc(ADC_OFF);
   setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
   setup_timer_1(T1_DISABLED);
   setup_timer_2(T2_DISABLED,0,1);
   setup_comparator(NC_NC_NC_NC);
   setup_vref(FALSE);
   setup_oscillator(OSC_8MHZ);
   
   SET_TRIS_A(0b00000000);
   
   While(true)
   {
   
      delay_ms(100);
     
      output_high(PIN_A0);
      output_high(PIN_A1);
      output_high(PIN_A2);
      output_high(PIN_A3);
      output_high(PIN_A4);
      output_high(PIN_A5);
   
      delay_ms(100);
      output_low(PIN_A0);
      output_low(PIN_A1);
      output_low(PIN_A2);
      output_low(PIN_A3);
      output_low(PIN_A4);
      output_low(PIN_A5);
   }

}
mmprestine



Joined: 13 Jan 2004
Posts: 29
Location: Green Bay, Wisconsin

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PostPosted: Thu Oct 18, 2007 10:39 am     Reply with quote
Shocked Guess I should have read the data sheet a bit more closely. GPIO3 is only configurable as a general purpose input or as a Master Clear with weak pull-up.
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