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Is it possible to read a constante as high and low byte?

 
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Ivar Johnsrud
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Is it possible to read a constante as high and low byte?
PostPosted: Tue Nov 12, 2002 12:11 pm     Reply with quote

Does anyone know if it is possible to read a
constant as high and low byte, something like this:

#define COUNT 0x10FF

#asm
movlw HIGH COUNT
movwf TMR0H
movlw LOW COUNT
movwf TMR0L
#endasm

-Ivar
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Original Post ID: 8808
Neutone



Joined: 08 Sep 2003
Posts: 839
Location: Houston

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Re: Is it possible to read a constante as high and low byte?
PostPosted: Tue Nov 12, 2002 12:31 pm     Reply with quote

:=Does anyone know if it is possible to read a
:=constant as high and low byte, something like this:
:=
:=#define COUNT 0x10FF
:=
:=#asm
:= movlw HIGH COUNT
:= movwf TMR0H
:= movlw LOW COUNT
:= movwf TMR0L
:=#endasm
:=
:=-Ivar

This may be what you are looking for.

set_timer0(COUNT);
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Original Post ID: 8810
Ivar Johnsrud
Guest







Re: Is it possible to read a constante as high and low byte?
PostPosted: Tue Nov 12, 2002 12:33 pm     Reply with quote

:=:=Does anyone know if it is possible to read a
:=:=constant as high and low byte, something like this:
:=:=
:=:=#define COUNT 0x10FF
:=:=
:=:=#asm
:=:= movlw HIGH COUNT
:=:= movwf TMR0H
:=:= movlw LOW COUNT
:=:= movwf TMR0L
:=:=#endasm
:=:=
:=:=-Ivar
:=
:=This may be what you are looking for.
:=
:=set_timer0(COUNT);
:=

Yeah, I just realized, thanks.

-Ivar
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Sherpa Doug
Guest







Also check out MAKE8()
PostPosted: Tue Nov 12, 2002 12:50 pm     Reply with quote


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Original Post ID: 8813
johnpcunningham
Guest







Re: Is it possible to read a constante as high and low byte?
PostPosted: Tue Nov 12, 2002 1:31 pm     Reply with quote

<font face="Courier New" size=-1>Another idea for you (like a UNION) using 16F877:

//register locations
#byte TMR1L 0x0E
#byte TMR1H 0x0F

void main(){
int16 timer1_long;

//get 16 bit value of timer
timer1_long = make16(TMR1H, TMR1L);

//set timer values
TMR1L = 0xAA;
TMR1H = 0xBB;

while(1){};
}</font>
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Mark



Joined: 07 Sep 2003
Posts: 2838
Location: Atlanta, GA

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Re: Is it possible to read a constante as high and low byte?
PostPosted: Tue Nov 12, 2002 3:05 pm     Reply with quote

Yet another way....

using 16F877:

long TMR1;
#locate TMR1 = 0x0E

#define TIMERVALUE 0xAA55
void main(void)
{
TMR1 = TIMERVALUE;
while(1)
{
}
}
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