Is it possible to interpret non-standard serial data with PicBasic (sample attached)

[pedja089]

If you need only ENABLE use count to count pulses.
Try something like this:

COUNT Pin, Period, Var
If Var<xxx then
    enable=1
else 
    enable=0
endif

[CuriousOne]

But pulses are of different width in series, will it work?

[CuriousOne]

Just checked, it works, but not as it should - even on same sequence, it always reads different values.

taki:
COUNT PORTC.4, 70, LABEL
if label=0 then
goto taki
endif
LCDOUT $FE,$c0, DEC(LABEL), "          "
PAUSE 5
GOTO TAKI

[pedja089]

try this:
taki:
While PORTC.4=0
WEND
COUNT PORTC.4, 70, LABEL
LCDOUT $FE,$c0, DEC5 LABEL
PAUSE 5
GOTO TAKI

[CuriousOne]

The actual issue is different I guess.

The system used is IDPPM - Differential Pulse Position Modulation.
Now I changed algorithm, and it detects pulses, there are 34 pulses, and it does it properly. But quantity of pulses is always 34, only pauses between them change, so COUNT is not proper implementation I guess.

P.S. above code displays only 00000

[pedja089]

I was thinking that 1 is represented with missing pulse.
You can try something like this

DEFINE PULSIN_MAX 65535 ' Limit wait-for-pulse and maximum-pulse count
While PORTC.4=0 'wait for rising edge of start pulse
WEND
FOR I=0 TO 33
PULSIN PORTC.4,0,W3
IF W3>XXX THEN GOTO GotData
NEXT I

[CuriousOne]

A side note, a statement like

IF PORTC.4=1 THEN

actually sets PORTC.4 high.

Is this bug or feature?

I've added 1 transistor signal inverter, but no help. Also, your code does not work.

OK, I will give up with this idea.