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Working with digits.. how do i..... — Parallax Forums

Working with digits.. how do i.....

ArchiverArchiver Posts: 46,084
edited 2002-01-28 06:05 in General Discussion
I can't seem to find a way to combine 3 nibbles with single digit values
into one bye that hold the values of the nibbles in digits 1 2 & 3.
hopefully I can explain it better with below.

I have:
digita var nib
digitb var nib
digitc var nib
target var byte

digita = 1
digitb = 2
digitc = 5

I want target to equal 125. Can it be done with a BS2P40?

-Rob

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2002-01-28 02:55
    I am not a math wiz but this might work

    digita = digita
    digitb = digitb * 10
    digitc = digitc * 100
    target = digita + digitb + digitc

    I hope this works. keep your eyes open, the masters for math might be able to
    find a better way.

    AJ


    --- In basicstamps@y..., "Robert Staph" <rstaph@a...> wrote:
    > I can't seem to find a way to combine 3 nibbles with single digit values
    > into one bye that hold the values of the nibbles in digits 1 2 & 3.
    > hopefully I can explain it better with below.
    >
    > I have:
    > digita var nib
    > digitb var nib
    > digitc var nib
    > target var byte
    >
    > digita = 1
    > digitb = 2
    > digitc = 5
    >
    > I want target to equal 125. Can it be done with a BS2P40?
    >
    > -Rob


    [noparse][[/noparse]Non-text portions of this message have been removed]
  • ArchiverArchiver Posts: 46,084
    edited 2002-01-28 03:34
    If I understand:

    target=(digita*100)+(digitb*10)+digitc

    Right?

    Al Williams
    AWC
    * Floating point math for the Stamp, PIC, SX, or any microcontroller
    http://www.al-williams.com/awce/pak1.htm

    >
    Original Message
    > From: Robert Staph [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=XbBbrCzZozwUotARVY84rjj4VpWSy_Z4Yb82dwg5ZvB3mUpHkV_d686bLYasyI0Y3LVYP_MVDGMgbEJc]rstaph@a...[/url
    > Sent: Sunday, January 27, 2002 8:54 PM
    > To: basicstamps@yahoogroups.com
    > Subject: [noparse][[/noparse]basicstamps] Working with digits.. how do i.....
    >
    >
    > I can't seem to find a way to combine 3 nibbles with single
    > digit values into one bye that hold the values of the nibbles
    > in digits 1 2 & 3. hopefully I can explain it better with below.
    >
    > I have:
    > digita var nib
    > digitb var nib
    > digitc var nib
    > target var byte
    >
    > digita = 1
    > digitb = 2
    > digitc = 5
    >
    > I want target to equal 125. Can it be done with a BS2P40?
    >
    > -Rob
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the
    > Subject and Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to
    > http://docs.yahoo.com/info/terms/
    >
  • ArchiverArchiver Posts: 46,084
    edited 2002-01-28 04:09
    thats just what I needed.. I was messing with arrays and found a way using
    a for/next loop, but this will save code space.

    -Rob
    Original Message
    From: "Al Williams" <alw@a...>
    To: <basicstamps@yahoogroups.com>
    Sent: Sunday, January 27, 2002 10:34 PM
    Subject: RE: [noparse][[/noparse]basicstamps] Working with digits.. how do i.....


    >
    > If I understand:
    >
    > target=(digita*100)+(digitb*10)+digitc
    >
    > Right?
    >
    > Al Williams
    > AWC
    > * Floating point math for the Stamp, PIC, SX, or any microcontroller
    > http://www.al-williams.com/awce/pak1.htm
    >
    > >
    Original Message
    > > From: Robert Staph [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=urJcroRT3cWKVyuKQCwAK3HitjQkn3MtgZdSvNPwxKNgKMlptW6mBgl0p2igqioQpJtSGqHWKrN-1Fs]rstaph@a...[/url
    > > Sent: Sunday, January 27, 2002 8:54 PM
    > > To: basicstamps@yahoogroups.com
    > > Subject: [noparse][[/noparse]basicstamps] Working with digits.. how do i.....
    > >
    > >
    > > I can't seem to find a way to combine 3 nibbles with single
    > > digit values into one bye that hold the values of the nibbles
    > > in digits 1 2 & 3. hopefully I can explain it better with below.
    > >
    > > I have:
    > > digita var nib
    > > digitb var nib
    > > digitc var nib
    > > target var byte
    > >
    > > digita = 1
    > > digitb = 2
    > > digitc = 5
    > >
    > > I want target to equal 125. Can it be done with a BS2P40?
    > >
    > > -Rob
    > >
    > >
    > > To UNSUBSCRIBE, just send mail to:
    > > basicstamps-unsubscribe@yahoogroups.com
    > > from the same email address that you subscribed. Text in the
    > > Subject and Body of the message will be ignored.
    > >
    > >
    > > Your use of Yahoo! Groups is subject to
    > > http://docs.yahoo.com/info/terms/
    > >
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and
    Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2002-01-28 04:31
    This may not help you, but it does bring up a good discussion that
    may be of use.

    When nibbles are used to represent decimal digits, it's referred to
    as BCD, or Binary Coded Decimal.

    Typically, each nibble holds a value from 0 (%0000) to 15 (%1111),
    which is the basis for the hexidecimal numbering system where each
    nibble can hold a value of 0 to F.

    If the nibble value is limited to 9 max (binary 1001) each nibble
    then represents the decimal value.

    In your example if you only wanted to display the value, we could use
    the HEX modifier to display the BCD value:

    digita var nib
    digitb var nib
    digitc var nib
    target var byte

    digita = 1
    digitb = 2
    digitc = 5

    DEBUG HEX digita,HEX digitb,HEX digitc,CR


    Another thing that could be done is define a word varaible, then
    parse out its individual nibbles to other variable names alleviating
    the need to re-assemble the nibbles and saving memory.

    DIGIT Var WORD
    Digit1 var DIGIT.NIB3
    Digit2 var DIGIT.NIB2
    Digit3 var DIGIT.NIB1
    Digit4 var DIGIT.NIB0

    Digit1 = 1
    Digit2 = 2
    Digit3 = 3
    Digit4 = 4

    DEBUG HEX DIGIT,CR

    -Martin Hebel
    Care to have a GUI for your Stamp?
    http://www.selmaware.com/stampplot

    Want to learn more abot electronics?
    http://www.siu.edu/~imsasa/est



    --- In basicstamps@y..., "Robert Staph" <rstaph@a...> wrote:
    > I can't seem to find a way to combine 3 nibbles with single digit
    values
    > into one bye that hold the values of the nibbles in digits 1 2 & 3.
    > hopefully I can explain it better with below.
    >
    > I have:
    > digita var nib
    > digitb var nib
    > digitc var nib
    > target var byte
    >
    > digita = 1
    > digitb = 2
    > digitc = 5
    >
    > I want target to equal 125. Can it be done with a BS2P40?
    >
    > -Rob
  • ArchiverArchiver Posts: 46,084
    edited 2002-01-28 06:05
    Good, informative post, Martin.

    Thanks,
    Ray McArthur
    Original Message
    From: selmaware <martin@s...>
    To: <basicstamps@yahoogroups.com>
    Sent: Sunday, January 27, 2002 11:31 PM
    Subject: [noparse][[/noparse]basicstamps] Re: Working with digits.. how do i.....


    > This may not help you, but it does bring up a good discussion that
    > may be of use.
    >
    > When nibbles are used to represent decimal digits, it's referred to
    > as BCD, or Binary Coded Decimal.
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