Help with TIMER1 + SLEEP

[Yodoad]

TIMER1 should be possible to still counting when the PIC is in SLEEP mode, but i dont get it to work.
I have modded DT Elapsed_INT18.bas to work with a second 32.768kHz crystal on T1OSO and T1OSI:

'****************************************************************
'*  Name    : Elapsed_INT-18.bas                                *
'*  Author  : Darrel Taylor                                     *
'*  Date    : JUL 11, 2006                                      *
'*  Version : 1.0                                               *
'*  Notes   : Must have DT_INTS-18.bas loaded first             *
'****************************************************************
DISABLE DEBUG

; syntax =     Handler  IntSource,        Label, Type, ResetFlag?
DEFINE  Elapsed_Handler  TMR1_INT,  _ClockCount,  PBP,  yes
; the above define can be used in the INT_LIST macro, if desired (optional)

Seconds  var byte
Minutes  var byte
Hours    var byte
Days     var word

SecondsChanged   var bit
MinutesChanged   var bit
HoursChanged     var bit
DaysChanged      var bit
SecondsChanged = 1
MinutesChanged = 1

Goto OverElapsed

' ------------------------------------------------------------------------------
' To calculate a constant for a different crystal frequency - see this web page
' http://www.picbasic.co.uk/forum/showthread.php?t=2031
' ------------------------------------------------------------------------------
Asm

TimerConst = 08000h  ; For 32,768 kHz
  
; -----------------  ADD TimerConst to TMR1H:TMR1L
ADD2_TIMER   macro
;    CHK?RP  T1CON
    BCF     T1CON,TMR1ON, 0        ; Turn off timer
    MOVLW   LOW(TimerConst)        ;  1
    ADDWF   TMR1L,F, 0             ;  1    ; reload timer with correct value
    BTFSC   STATUS,C               ;  1/2
    INCF    TMR1H,F, 0             ;  1
    MOVLW   HIGH(TimerConst)       ;  1
    ADDWF   TMR1H,F, 0             ;  1
    endm

; -----------------  ADD TimerConst to TMR1H:TMR1L and restart TIMER1 ----------
RELOAD_TIMER  macro
    ADD2_TIMER
    BSF     T1CON,TMR1ON, 0           ;  1    ; Turn TIMER1 back on
    endm

; -----------------  Load TimerConst into TMR1H:TMR1L --------------------------
LOAD_TIMER  macro
    MOVE?CT  0, T1CON,TMR1ON
    MOVE?CB  0, TMR1L
    MOVE?CB  0, TMR1H
    ADD2_TIMER
    endm
EndAsm

' ------[ This is the Interrupt Handler ]---------------------------------------
ClockCount:
@ RELOAD_TIMER                    ; Reload TIMER1

       Seconds = Seconds + 1
       SecondsChanged = 1
       if Seconds = 60 then
          Minutes = Minutes + 1
          MinutesChanged = 1
          Seconds = 0
       endif
       if Minutes = 60 then
          Hours = Hours + 1
          HoursChanged = 1
          Minutes = 0
       endif
       if Hours = 24 then
          Days = Days + 1
          DaysChanged = 1
          Hours = 0
       endif

@ INT_RETURN                      ; Restore context and return from interrupt

'-----====[ END OF TMR1 Interrupt Handler ]====---------------------------------

StartTimer:
    T1CON.0 = 1                   ; (TMR1ON) Start TIMER1
    T1CON.1 = 1                   ; (TMR1CS) Use External clock from RC0/T1OSO/T13CKI pin
    T1CON.2 = 1                   ; (T1SYNC) Do not synchronize external clock input
    T1CON.3 = 1                   ; (T1OSCEN) Disable External Oscillator
    T1CON.6 = 0                   ; (T1RUN) Device clock is derived from another source

return

; -----------------
StopTimer:
    T1CON.0 = 0                   ; Turn OFF Timer1
return

BitSave  VAR  BIT
; -----------------
ResetTime:
    BitSave = T1CON.0             ; Save TMR1ON bit
@   LOAD_TIMER                    ; Load TimerConst
    T1CON.0 = BitSave             ; Restore TMR1ON bit
    Seconds = 0
    Minutes = 0
    Hours = 0
    Days = 0
    SecondsChanged = 1
    MinutesChanged = 1
    HoursChanged = 1
    DaysChanged = 1
return

OverElapsed:
ENABLE DEBUG

I am not 100% sure of the T1CON settings (red in the code)
If i just send the data out without SLEEP via USART it works like a charm! But if i add:
@ SLEEP
HSEROUT [DEC2 Hours,DEC2 Minutes,DEC2 Seconds]
(WDT on, WDTPS = 128 in settings)

It don't work, i just get strange results like "Ò‚‚‚‚Ò‚‚‚‚Ò‚‚Ò‚S‚Ò‚‚Ò" in hypertrm

Any ideas?

It is PIC18F4550 and yes i have looked in the manual!

[Melanie]

Try adding a couple of Dummy statements AFTER the @ SLEEP in your PICBASIC example and see what happens...

@ SLEEP
@ NOP
@ NOP

[Yodoad]

I did switch over from primary external clock to internal clock and it works better now!
But if the PIC sleeps more then 1 second i get into trouble.
So guess the PIC cannot sleep more then 1 second to get proper result?
Because the interrupt routine is build to do a interrupt every second. And an TMR1 interrupt would not execute if the PIC is in sleep mode, right? Even if i have secondary clock source for TIMER1?