16LF1824 strange problem

[midali]

@ Amoque - Also, I tried with () but no effect

@ Alain - 1000X thx for your example. I'm a begginer and I see in my eyes more fog ....but was a inspiration for me and I solved . I think that is a unusually code, but work !

Code :

init:
pulsin portc.2 , 1, varb
for i = 1 to 50
pulsin portc.2 , 1, varb
varb = varb +1
next i
if varb > 60 then
goto init2
else
goto init
endif
goto init

init2:
pulsin portc.2 , 1, varb
if varb > 160 or varb <140 then goto init
if varb > 140 and varb < 160 then goto beep
goto init2

beep:
...code...
goto beep

Thx to all for help!

[EarlyBird2]

@ Amoque - Also, I tried with () but no effect

In your code () will have no effect because the simple comparisons work as expected. But using () makes the code easier to read and it is good practice to always use them.

@ Alain - 1000X thx for your example.

Alain's code is almost the same as yours

varb var byte
 varb = 0
 pause 200

 init:
 pulsin portc.2 , 1, varb
 if varb < 140 or varb > 160 then init
 if varb > 140 and varb < 160 then goto beep
 goto init

Except he added a pause 100 and a retry just to make sure

varb var byte
 varb = 0
 pause 200

 init:
 pulsin portc.2 , 1, varb
 if (varb < 140) or (varb > 160) then init
 pause 100
 pulsin portc.2 , 1, varb
 if (varb < 140) or (varb > 160) then init
 if (varb > 140) and (varb < 160) then goto beep
 goto init

Your code that works is adding delays in a complicated way and also has a retry.

init:
pulsin portc.2 , 1, varb
for i = 1 to 50
    pulsin portc.2 , 1, varb
    varb = varb +1
next i
if varb  > 60 then
    goto init2
 else                                                                        
    goto init
endif
goto init

init2:
pulsin portc.2 , 1, varb
if varb > 160 or varb <140 then goto init
if varb > 140 and varb < 160 then goto beep
goto init2

beep:
...code...
goto beep

It looks to me that on starting the RC a "false signal" is received that satisfies the "if varb > 140 and varb < 160 then goto beep" condition and by adding the delay and retry these "false signals" are trapped. Can you try your modified code above, the one with the added pause 100 and retry in red?