Then how can I reduce it if there interrupt without using decrement ?
thanks
On 7/07/2013 12:16 AM, Byron Jeff wrote:
> On Sat, Jul 06, 2013 at 10:03:27PM +0800, Electronic Consultation wrote:
>> after
>> LedTimer RES 1
>>
>> How can I set it to 20 decimal ?
> Exactly the same way you did it with COUNT:
>
> 	MOVLW	.20	; Note I normally change my default Radix to decimal
> 	MOVWF	LedTimer
>
>> thanks
>> On 6/07/2013 9:42 PM, Byron Jeff wrote:
>>> On Sat, Jul 06, 2013 at 07:08:16PM +0800, Electronic Consultation wrote=
:
>>>> Guys,
>>>>
>>>> I want to reduce LedTimer after interrupt but it returned to 20 again
>>>> after interrupt,
>>>> Do you have idea how handle it ?
>>> The Equate (EQU) you have below fixes the value of LedTimer to 20. Sinc=
e
>>> you were moving it to COUNT, I figured you wanted a constant 20 counts =
to
>>> count down in COUNT (which I do not see a definition for).
>>>
>>> Your code uses the RES directive to declare variables. If you want LedT=
imer
>>> to change, then it needs to be a variable too.
>>>
>>> BAJ
>>>
>>>> thanks
>>>> [CODE]LedTimer EQU .20 ;10 decimal (for content of the counter to get =
100ms)
>>>>
>>>>        led_state_1
>>>>                    bcf     INTCON,T0IF             ;clear the interrup=
t flag
>>>>                    bsf      PORTB, POWERLED         ;Turn on LED
>>>>                movlw LedTimer
>>>>                    movwf COUNT
>>>>
>>>>
>>>>              ;counting
>>>>
>>>>             check_counter
>>>>                            btfss INTCON,T0IF
>>>>                goto  check_counter
>>>>
>>>>
>>>>                         sublw .1
>>>>                         btfss STATUS, Z        ;Is the result 0, clear=
 COUNT
>>>>
>>>>
>>>>               goto  check_counter     ;if false check the COUNTER agai=
n
>>>>                         goto  next_state        ;if true  go to this s=
tatement
>>>>
>>>>
>>>>
>>>>            next_state
>>>>                        clrf    COUNT             ;if false go to this
>>>> statement
>>>>                        incf    LedState,1            ; if 00 increase =
the
>>>> state, for the next state
>>>>
>>>>                        return[/CODE]
>>>> --=20
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