18F26K42 TMR1 Interrupt troubles

[HenrikOlsson]

Hi,
I don't have a definitive answer for you but here's a couple of things.

First, if you haven't already, make SURE that you have Control of the pin where you have the LED connected. Make it blink a couple of times at startup or whatever.

In case there's something weird with the .BIT modifier I'd try the "standard" PIR4.0 syntax. I'm not sure it's even any difference under the hood but just to make sure.

In your main code, do:

IF PIR4.0 = 1 THEN
  TOGGLE LED
   PIR4.0 = 0
ENDIF

That'll tell you if the interrupt flag gets set or not.

/Henrik.

[richard]

your code would toggle led @32mS intervals , its a bit hard to see .
I can't compile pbp3 for this chip but can say that these settings work in xc8

#CONFIG
    CONFIG FEXTOSC = OFF               
    CONFIG RSTOSC = HFINTOSC_64MHZ       
    CONFIG CLKOUTEN = OFF                
    CONFIG PR1WAY = OFF                    
    CONFIG CSWEN = ON                    
    CONFIG FCMEN = OFF                    
    CONFIG MCLRE = INTMCLR               
    CONFIG PWRTS = PWRT_OFF                
    CONFIG MVECEN = OFF                   
    CONFIG IVT1WAY = OFF                
    CONFIG LPBOREN = OFF               
    CONFIG BOREN = OFF                    
    CONFIG BORV = VBOR_245                
    CONFIG ZCD = OFF                    
    CONFIG PPS1WAY = OFF               
    CONFIG STVREN = OFF                    
    CONFIG DEBUG = OFF                  
    CONFIG XINST = OFF                    
    CONFIG WDTCPS = WDTCPS_31            
    CONFIG WDTE = OFF                   
    CONFIG WDTCWS = WDTCWS_7            
    CONFIG WDTCCS = LFINTOSC           
    CONFIG BBSIZE = BBSIZE_512            
    CONFIG BBEN = OFF                    
    CONFIG SAFEN = OFF                    
    CONFIG WRTAPP = OFF                    
    CONFIG WRTB = OFF                   
    CONFIG WRTC = OFF                    
    CONFIG WRTD = OFF                    
    CONFIG WRTSAF = OFF                    
    CONFIG LVP = OFF                    
    CONFIG CP = OFF                        
#ENDCONFIG
  
'Defines, Includes, and Constants-----------------------------------------------
DEFINE OSC 64                                   ' Calibrate PBP to 64MHz clock
OSCFRQ = 8                              ' Set system clock to 64MHz internal
OSCCON1 = $60
on interrupt goto INC_TICK
'Direction----------------------------------------------------------------------
TRISA.1 = 0
'Alias---------------------------------------------------------------------------
LED    VAR LATA.1
'Variables----------------------------------------------------------------------
'Initialize Registers----------------------------------------------------------------------
Initilize:  
    ANSELA   = 0                      ' Set digital
    
     LED = 0
   
    INTCON0.7 = 1                                      'Enable global int
    T1CON = $35                                          'Prescale 1:8; enable the TMR1
   
    T1CLK = 1                                           'Clock Source Fosc/4
    
    
    PIR4.0 = 0                                             'Clear the Int flag
    PIE4.0 = 1                                             'Enable timer int
    
                                        'Start the timer 
C0UNTER VAR BYTE   
   
'Code---------------------------------------------------------------------------  
Main:  
    pause 1 
    Goto Main
'----- INTERRUPT CODE -------------------
Disable
INC_TICK:
         COUNTER=COUNTER+1
         IF COUNTER==31 THEN
         LED=!LED           ;TOGGLE LED ONCE PER SEC
         COUNTER=0
         ENDIF
         
         PIR4.0 = 0
         
         Resume
enable