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Timer Issues
Correct me if i'm wrong, but I should be able to set the value of TMR0L and TMR0H to whatever I like yes?
If I do this as a test:
Code:
DEFINE OSC 48
T0CON=%10010110
TMR0L=0
TMR0H=0
pause 200
result.LowByte=TMR0L
result.HighByte=TMR0H
The result varies every time i do it. As if reseting TMR0L and TMR0H is doing nothing.
However if I do this:
Code:
DEFINE OSC 48
T0CON=%10010110
result1.LowByte=TMR0L
result1.HighByte=TMR0H
pause 200
result2.LowByte=TMR0L
result2.HighByte=TMR0H
result=result2-result1
The result is correct every time.
Does anyone know why?
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TMR0 is 8-bit.
Which PIC is it?
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Nope. Got TMR0 set to 16-bit.
18F4550
I've updated the code in the 1st post with the TMR0 settings
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Timer config is 16 bits ...
Why not write Highbyte first ... as datasheet explains ...
" Similarly, a write to the high byte of Timer0 must also
take place through the TMR0H Buffer register. The high
byte is updated with the contents of TMR0H when a
write occurs to TMR0L. This allows all 16 bits of Timer0
to be updated at once."
Alain
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That did the trick.
Thanks Acetronics.
