two BCD switches

[Archangel]

Hi Mugel,
IF you have enough ports THEN . . .

MyVar var byte
If PortA.0 != 0 Then
my var = 0
else If portA.1 != 0 then
myvar = 1 . . . . and so on

here is another way using analog inputs
http://www.romanblack.com/keypad.htm

[mister_e]

If i'm right, the following may be something to play 'round of

Switch1 Var Byte ' let's say it's connected on PORTB<7:4>
Switch2 var Byte ' let's say it's connected on PORTA<4:0>
Result var byte

start:
    Switch1=PORTB>>4
    Switch2=PORTA & $0F
    Result=(Switch1*10)+Switch2

[Mugel]

Hi guys!

thanks for your help, everything works fine for me Pic related of course, haha.

got to measure engine speed, rev limit with two BCD switches AND ignition shutoff while engine stands still to save the coil. WOW never thought this goes that easy, meaning: I am able to build that.

Ok youre right, this is just the lab version on a veroboard with a frequency counter as "test engine". But i´m shure it will work in Reality too because I´m experienced in spike pested engine electrics

I´ll tell more!

Mugel

[Archangel]

Hi Mugel,
Glad you got it working.
If it's not top secret I would like to eyeball that code
JS