TMR0 as counter

[sayzer]

Thanks for yours answer.
My default PIC is pic16f88.
Maybe i change with pic18f1330 which have timer0 16bit.

Savnik,

16F88 already has 16-bit timer.

Why change the whole car while you can change one tire and get going?


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[savnik]

Savnik,

16F88 already has 16-bit timer.

Why change the whole car while you can change one tire and get going?


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From datasheet:
---------------------------
The Timer0 module timer/counter has the following
features:
• 8-bit timer/counter
• Readable and writable
• 8-bit software programmable prescaler
• Internal or external clock select
• Interrupt-on-overflow from FFh to 00h
• Edge select for external clock

[Acetronics2]

Hi, Savnik

Sayzer was only telling there's a 16 Bits timer in 16F88 : Timer 1 ...

but, if you want to use RA.4 and keep the same pinout ( must we understand PC board is already made ??? ) ... you'll have to turn to 18F1320 !

Alain

[savnik]

Hi, Savnik

Sayzer was only telling there's a 16 Bits timer in 16F88 : Timer 1 ...

but, if you want to use RA.4 and keep the same pinout ( must we understand PC board is already made ??? ) ... you'll have to turn to 18F1320 !

Alain

Ok , i understand
Yes PC board is already made, so i turn to 18F1320.

Thanks

[Darrel Taylor]

Or you could just count the Overflows from timer0 and make it a 16-bit or larger counter.

DT

[savnik]

Or you could just count the Overflows from timer0 and make it a 16-bit or larger counter.

DT

Now count the TMR0 and also count the prescaler (256)

result var word ' 16 bit result of count, high from tmr0 low from prescaler
TMR0 = result.Byte1
prescaler = result.Byte0

But i cann't take the decimal numbers , only the integer

[sayzer]

Savnik,

I understood that you already have a PCB and can not change it.

Then, if you are not using RB6, then just short it to RA4 manually with a tiny cable and use Timer1.

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[Acetronics2]

Now count the TMR0 and also count the prescaler (256)

result var word ' 16 bit result of count, high from tmr0 low from prescaler
TMR0 = result.Byte1
prescaler = result.Byte0

But i cann't take the decimal numbers , only the integer

Hi, Savnik,

so, you want to use a ... 24 bits counter !!!

One more good reason to turn to 18F1320 AND use PBPL ... instead of PBPW !

But, once more ... will you tell us the PIC Osc frequency and the frequency range you intend to measure at PORTA.4

... as I smell something really interesting ...

Alain

[skimask]

But i cann't take the decimal numbers , only the integer

And yet AGAIN!!!
PBP doesn't do fractional numbers by default!!!!! NEVER has, NEVER will!!!
You have to create your own method to extract any fractions you need.
Multiply the number your dealing with by 100, the 2 rightmost digits are your fraction....simple as that!
Or maybe not...