16f1782 and 16f1783 Missing On Interrupt Definition

[kent_twt4]

Back again, can't fight my way out of a paper bag today, LOL.

Seems like I used to be able to work around this previously on a different chip, not so with the 16f1783. Needs the "PORTAChange:IOCIE,IOCIF" added to the dat file. Here is the code that makes for an "invalid interrupt event"

#chip 16f1783, 8

'*****setup IOC on RA7 with pullup*****
#define Switch PortA.7
Dir SWITCH In
Set NOT_WPUEN Off
Set WPUA7 On
SET IOCAN7 ON   'int. on neg. edge (use iocapx for pos. edge)
ON Interrupt PORTACHANGE CALL BeginLog

Main:
goto Main

sub BeginLog
  PULSEOUT PortA.5, 100 MS
  set IOCAF7 Off
  Do While switch Off
  Loop
    If Begin = True Then
      StopLog = True
      exit sub
    End If
     Begin = True
end sub

PS The 16f782/1783 also has a PortCChange also

[Anobium]

Dear person that is trapped in brown paper bag. 😃

I would recommend the following in the user program.

~~~~
#define PORTACHANGE PORTBCHANGE
~~~~

This should be forward compatible.

[Anobium]

Hugh and I have spoken about the Constant and the range IOC's,

I think we should retain what we have, in terms of PortXXChange, but add a new Constant called PortIOChange. I have reviewed the permutations.. there are 720 different options of PortA thru to PortG - so, I am thinking of PortIOChange to the generic IOC handler for all porta. Then, the interrupt handler can determine the source of the interrupt. Open to other ideas - of course.

[Anobium]

or.... you have another option to resolve this going forward - I think it is easier to maintain also.

Make these changes..

• remove the 'On Interrupt'. The complete command.
• rename your sub handler to 'sub interrupt'

• then in 'sub interrupt' test the register bit for the event.
  ~~~~
  sub interrupt

  'check the interrupt flags
  if IOCIF = 1 then  'you know it is the interrupt you are looking to handle
  
      PULSEOUT PortA.5, 100 MS
          set IOCAF7 Off
          Do While switch Off
          Loop
          If Begin = True Then
              StopLog = True
              exit sub
          End If
          Begin = True
      exit sub
  end if
  
  'more checks for more interrutpts...
  

  end sub

  ~~~~

This method justs uses the default interrupt handler and it a really good way to management interrupts.

Anobium

[kent_twt4]

Glad someone has their thinking caps on. Thanks.

The IOC interrupt has always been a little trickier to set up. I forgot about the generic Interrupt, and that looks to be the way forward, especially when handling multiple IOC interrupts.

Since I've got the solution now, I am neutral on the ON Interupt PortIOChange. That would be a lot of work on the .dat files. And, the setup questions may still not be squashed entirely either?