Instant Interrupts - Revisited

[sougata]

Hi,

It works. Your II rules. I am using it to 100Hz and thanks for your concern.

[Normnet]

Interrupt for 18F's works fine.
How to write assembly to set a variable instead of toggle led?

Norm

'---[TMR1_INT - interrupt handler]------------------------------------------
ASM
ToggleLED1
    btg  _LED1               ; toggle the pin
    INT_RETURN
ENDASM

[Darrel Taylor]

That depends on the type of variable, and what you want to set it too.
<br>

[Normnet]

That depends on the type of variable, and what you want to set it too.

INTERRUPT_SET VAR BIT
set to 1

Norm

[Darrel Taylor]

'---[TMR1_INT - interrupt handler]------------------------------------------
ASM
ToggleLED1
    MOVE?CT   1, _INTERRUPT_SET
    INT_RETURN
ENDASM

[Normnet]

Works good. Thank you.

I would like to reload timer 1 on each interrupt from a variable.

Something like:

wTIMER1 var TMR1L      ' access 16 bits of TMR1 
wTimerPreload VAR WORD
wTimerPreload  = 65211  'adjust in program

  
'---[TMR1_INT - interrupt handler]------------------------------------------
ASM
ToggleLED1
    MOVE?CT   1, _INTERRUPT_SET    ; SET FLAG
    INT_RETURN

wTIMER1 = wTimerPreload  ; in assembly

ENDASM

Norm

[Darrel Taylor]

See this page...
DT_INTS-14 (Timer Template)
http://darreltaylor.com/DT_INTS-14/TimerTemplate.html

It's in the 14-bit section, but it's pretty much the same for 18F's
<br>