I do not understand this result. The gist is that the pulse generating command seems to influence
the interrupt frequency. Here is exactly our same code with a PULSOUT PORTD.7, 50 inside the
interrupt routine.


Code:
OSCCON = %01100000 '4 Mhz
DEFINE OSC 4

LED1    VAR PORTD.4
wsave VAR BYTE $70 SYSTEM
INCLUDE "DT_INTS-14.bas"     ' Base Interrupt System
INCLUDE "ReEnterPBP.bas"     ' Include if using PBP interrupts

ASM
INT_LIST  macro    ; IntSource,        Label,  Type, ResetFlag?
        INT_Handler   TMR1_INT,  _ToggleLED1,   PBP,  yes
    endm
    INT_CREATE               ; Creates the interrupt processor
ENDASM
'5.0 mSec OR 200 Hz INTERRUPTS
T1CON = %00000001         'Prescaler = 1:1, TMR1ON
'PRELOAD 60543
PreLoad     VAR WORD
PreLoad =  60543
TMR1L = PreLoad.LowByte
TMR1H = PreLoad.HighByte
@ INT_ENABLE  TMR1_INT     ; enable Timer 1 interrupts

Main:      'DO WHATEVER YOU WANT HERE
'  PAUSE 1000
'  HIGH PORTD.7
'  PAUSE 1000
'  LOW PORTD.7
GOTO Main

'---[TMR1 - interrupt handler]--------------------------------------------------
ToggleLED1:
     TOGGLE LED1
     pulsout PORTD.7,50
'     PWM PORTD.7,127,1
'     TOGGLE PORTC.6    'CONNECTED TO METER
     TMR1L = PreLoad.LowByte   ' Load the timer with preload value.
     TMR1H = PreLoad.HighByte
@ INT_RETURN
And here's the LOGIC TOOL picture.

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