Multiple IF-THEN statements

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  1. - 19th June 2007, 09:56 #1
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    Default Multiple IF-THEN statements

    I know it is late and maybe that is the problem. I am trying to run multiple IF-THEN statements. Individually they work fine, but combining them does not. The combined statements assemble fine. BTW, I am reading a clock chip and after every minute rollover, I cycle a cooling fan approx 7 seconds at the 0 second point and 30 second point. I may have to adjust this time (or increase the number of cycles) so I want to be flexible. Where am I missing it?

    IF (rtcsec >= $00) AND (rtcsec <= $07) THEN
    portb.7 = 1
    IF (rtcsec >= $30) AND (rtcsec <= $37) THEN
    portb.7 = 1
    ELSE
    portb.7 = 0
    ENDIF
    ENDIF
  2. - 19th June 2007, 10:10 #2
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    try this;

    Code:
    IF rtcsec <= $07 OR (rtcsec >= $30 AND rtcsec <= $37) THEN
   portb.7 = 1
ELSE
   portb.7 = 0
ENDIF

    -----------------------------
    "If the Earth were a single state, Istanbul would be its capital." Napoleon Bonaparte
  3. - 19th June 2007, 10:36 #3
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    Smile

    Quote Originally Posted by DavidK View Post
    I know it is late and maybe that is the problem. I am trying to run multiple IF-THEN statements. Individually they work fine, but combining them does not. The combined statements assemble fine. BTW, I am reading a clock chip and after every minute rollover, I cycle a cooling fan approx 7 seconds at the 0 second point and 30 second point. I may have to adjust this time (or increase the number of cycles) so I want to be flexible. Where am I missing it?

    IF (rtcsec >= $00) AND (rtcsec <= $07) THEN
    portb.7 = 1
    IF (rtcsec >= $30) AND (rtcsec <= $37) THEN
    portb.7 = 1
    ELSE
    portb.7 = 0
    ENDIF
    ENDIF
    Here is why yours did not work - all I did was format your IF-Thens

    Code:
    IF (rtcsec >= $00) AND (rtcsec <= $07) THEN
	portb.7 = 1
	IF (rtcsec >= $30) AND (rtcsec <= $37) THEN 
		portb.7 = 1
	ELSE
		portb.7 = 0
	ENDIF
ENDIF
    As you can see in order for the code to reach your between 30-37 check, the first condition must be true (between 0-7) - go with Jerson's version or two separate checks like you said you had working.
    Paul Borgmeier
    Salt Lake City, UT
    USA
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  4. - 19th June 2007, 11:27 #4
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    Quote Originally Posted by paul borgmeier
    .... - go with Jerson's version ...
    Who is Jerson ?


    --------------
    "If the Earth were a single state, Istanbul would be its capital." Napoleon Bonaparte
  5. - 19th June 2007, 12:40 #5
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    Post one test only version ...

    Hi,

    May be we could simplify ...

    RTCSEC is ALWAYS >= 0 with PbP ... huh ...


    IF ( RTCSEC & $F0) = 0 or 3 ... AND
    IF RTCSEC & $0F < 8 ... PortB.7 = 1

    Else Portb.7 = 0

    so,

    IF (( rtcsec & $F0 = 0 ) OR (rtcsec & $F0 = $30 )) AND ( rtcsec & $0F < 8 ) THEN
    PORTB.7 = 1
    ELSE
    PORTB.7 = 0
    ENDIF

    ...


    Alain

    PS: Hi Sayzer ... you've also got one point !!!
    Last edited by Acetronics2; - 19th June 2007 at 12:52.
    ************************************************** ***********************
    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
    *****************************************
  6. - 19th June 2007, 15:38 #6
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    Talking

    WOW !! That simple. I was real foggy last night. Tried the code suggestion and it works perfect. Now hopefully I can get by with just two cooling’s otherwise I have to install a temperature sensor, wich I might do anyway. Fans make noise.

    Thanks everyone for your help and explanations
  7. - 19th June 2007, 17:25 #7
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    Red face

    Quote Originally Posted by sayzer View Post
    Who is Jerson ?


    --------------
    MY apologies - Please substitute Sayzer for Jerson. That is what staying up to 4AM gets me. Jerson regularly contributes and for some reason, I mixed you up when I was writing my reply? (I hope neither of you are offended by that - if you are, next time either of you are in SLC, UT, I will by you a beer or a beverage of your choice).

    Paul
    Last edited by paul borgmeier; - 19th June 2007 at 17:27.
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  8. - 20th June 2007, 05:45 #8
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    Who is Jerson ?
    Hey, that's me. No offence taken Paul. I am in a way lucky to be entitled to one of your free beers/beverages. Thanks.

    Jerson
    Embedded Systems Designer
    http://jerson.co.in
  9. - 20th June 2007, 10:37 #9
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    Quote Originally Posted by paul borgmeier View Post
    ...Please substitute Sayzer for Jerson. ...

    Paul
    Which one is correct ?

    "Please substitute Sayzer for Jerson" OR "Please substitute Jerson for Sayzer ".


    I am confused a little there.

    Is it something with my English or my understanding?

    P.S. - Not offended of any kind...
    --------------------
    "If the Earth were a single state, Istanbul would be its capital." Napoleon Bonaparte
  10. - 20th June 2007, 18:09 #10
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    IF A=B... will B=A ?
    Steve

    It's not a bug, it's a random feature.
    There's no problem, only learning opportunities.
  11. - 20th June 2007, 18:17 #11
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    Talking

    Hi, Steve

    You're Wrong ...

    Here you will find ALL "SAYZER" or ALL "JERSON" ...

    no "equality" between them anywhere ...

    Let's say ...

    Give back to Sayzer what's Jule's ... ( Approximate joke ... but I really love it ... ever heard of Jules Sayzer ??? ... "tu quoque mi fili, "etc,etc ...)

    and give back to Jerson ... What's jerson's ...

    Alain
    ************************************************** ***********************
    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
    *****************************************
  12. - 20th June 2007, 18:28 #12
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    LMAO! Jule Sayzer
    Steve

    It's not a bug, it's a random feature.
    There's no problem, only learning opportunities.
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