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Migrating from pic16 to pic18

 
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Skirmitt



Joined: 19 May 2009
Posts: 60

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Migrating from pic16 to pic18
PostPosted: Tue Feb 07, 2012 4:04 am     Reply with quote
I have a project that runs perfect on pic16f886. I now need the µc to work faster so I plugged a 18f2685 in I had from a previous project.
Problem now is I can't get the INT on port B working. On port B there are 3 rotary encoders that generate INT's.

Code that matters:

Code:

#include <18F2685.h>

#device ADC=10
#fuses INTRC_IO, NOWDT, BROWNOUT, PUT, NOLVP
#use delay(clock=32000000)
#use rs232(baud=31250, xmit=PIN_C6, rcv=PIN_C7, ERRORS)

int b=0;
int newencoder=0;
int lastencoder=0;

int newencoder2=0;
int lastencoder2=0;

int newencoder3=0;
int lastencoder3=0;

#include "readencs.h"

#int_rb
void int_rb_isr(void)
{
   b = input_b();
   newencoder = b & 0b00000011;
   newencoder2 = b & 0b00001100;   
   newencoder3 = b & 0b00110000;   
}

void main()
{

enable_interrupts(INT_RB);
enable_interrupts(GLOBAL);

while(1)
{
encoder1();
encoder2();
encoder3();
readbuttons();
}
}


Schematics: http://mylantec.be/upload/PICMIX.pdf

With the PIC16F I had to declare all the port B INT pins seperately but for 18f series you can't do that ?
Skirmitt



Joined: 19 May 2009
Posts: 60

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PostPosted: Tue Feb 07, 2012 4:15 am     Reply with quote
Think I found it, 18f2685 doesn't have IOC on all pins, only the last 4.
Would there be a way to still be able to read the 3 encoders on pic18f ?
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