do you mean LedTimer RES 1 ?
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. Since
> 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 LedTim=
er
> 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 10=
0ms)
>>
>>       led_state_1
>>                   bcf     INTCON,T0IF             ;clear the interrupt f=
lag
>>                   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 CO=
UNT
>>
>>
>>              goto  check_counter     ;if false check the COUNTER again
>>                        goto  next_state        ;if true  go to this stat=
ement
>>
>>
>>
>>           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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--=20
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