Pulsin to pulsout with up than 4MHZ crystal ?

[Dave]

RCtech , Yes you are correct. The commands resolution depends on the oscillator used. So you must multiply or divide the variable accordingly.

Dave Purola,
N8NTA

[Acetronics2]

Hi, RCTech

Assuming DEFINE OSC doesn't interfere with osc speed for pulsin and pulsout, result won't be the same @ 4Mhz and @ 20 MHz. ratio will be 5 , as you tell.
The Valinpulse value will be the same for Pulsin and Pulsout.

Now, as RC is in your pseudo ... RC pulses values are ~ 80 to 220 @ 4Mhz and 400 to 1100 @ 20 Mhz ... okay, but...

@ 4Mhz, you write: Valinpulse var BYTE ....and @ 20 Mhz you MUST write : Valinpulse var WORD !!!

and I didn't see that in your code ...

Also take care, if you ever use DEFINE PULSIN_MAX to allow for the full signal ( 0 AND 1 state duration = full period )

Now, a little Trick seen nowhere :

Always Write : LOW PORTX.Y before a Pulsout statement ... many ununderstandable bugs come from here !!! ( explanation is in High capacitive loads behaviour of PICs ... and the Pulsout way of work )

Alain
30 years of R/C ...

[RCtech]

Hi, RCTech

.../...The Valinpulse value will be the same for Pulsin and Pulsout.

Okay, i'm not totally wrong ;O)

@ 4Mhz, you write: Valinpulse var BYTE ....and @ 20 Mhz you MUST write : Valinpulse var WORD !!!

Whow, i didn't know that little difference !

.../...
Now, a little Trick seen nowhere :
Always Write : LOW PORTX.Y before a Pulsout statement .../...

Thanx, i'm just a little bit more intelligent than yesterday, many many thanx.
Now it's half past 3 AM : too late for me to do the tests but tomorrow probably, i'll post a feedback.

And.... Nice to see i'm not the only one froggy here !

Dave, i've tested with multiplying etc (just in case), but, today i'm sure it was a mistake because pulsin & pulsout have the same res. depending the X-tal used so if pulsin have a 5 times ratio at 20Mhz, then, the pulsout too and i don't need to do some corrections by calcs.

I'll come back on the forum tomorrow or next day to tell if it's okay.

RCTech

[RCtech]

Back to confirm everything is okay, this stupid ''BYTEs'' are changed for ''WORDs'' now !

Thanx for your help.