DT Instant Interrupts help

[Acetronics2]

Hi,

W/ no interrupts using ...

....


    while 1
     TOGGLE LED1
     COUNT rpmIn, 100, rpm 
     LCDOUT $FE,2, "PULS/S ", DEC(RPM ), "            "
     LCDOUT $FE, $C0, "RPM ", DEC(rpm)*60 , "                 "
    wend

END

so simple as that ... ( LCDOUT spaces avoid resetting the LCD ... which is toooooooo long ! )

... BTW : How many pulses per rev. ???

Alain

[perides]

Hi...

Working fine now. Thanks for the directions.

I know I don´t need interrupts to just blink a led (and don´t need for most of things). Just to see how it works.

In future I expect this code will read some sensors (pressure, air temp, rpm and a pot), do some calculation and provide near exact extra fuel needed for an aftermarkt turbo charged engine runing at high revs. At this time I think that I´ll need interrups, since in this case, time is critical

... BTW : How many pulses per rev. ???

Don´t know yet... need to check. Using 1 at this time.

[perides]

Can´t figure by myself .
Can someone explain me tachometer maths??
Engine will run up to 5500 revs. 1 pulse for revolution.