Re: Slider with Checksum

It won't be possible currently, as our math expressions are not able
to produce a hex byte as required for the checksum.
I will look at adding this option in a future release, but I can't
promise when this will work.

In the meantime, you will either have to leave out the ability to
control via a slider, or use an intermediary product to do the hard
work (like a Crestron processor or PC running EventGhost as Fiasco has
mentioned).

Jarrod

On Feb 14, 7:47 pm, stbluesrul <paul.l.cra...@gmail.com> wrote:
> Jarrod,
>
> Will the update be able to support this?
>
> On Feb 13, 11:50 pm, Fiasco <dgvoll...@gmail.com> wrote:
>
>
>
> > If you have eventghost (free) and download my Samsung plugin it will
> > generate the checksums for you in the log
>
> > On Feb 13, 3:26 am, "Karl Addrison" <k...@addrison.co.uk> wrote:
>
> > > It could do, as 2's Complement is the way to display negative numbers
>
> > > -----Original Message-----
> > > From: commandfusion@googlegroups.com [mailto:commandfusion@googlegroups.com]
>
> > > On Behalf Of stbluesrul
> > > Sent: 12 February 2010 20:57
> > > To: CommandFusion
> > > Subject: Re: Slider with Checksum
>
> > > Karl,
> > > The steps I listed for the windows scientific calculator will return
> > > the correct checksum.  Could the "+/-" button be taking the inverse
> > > then adding 1 to it?
>
> > > The manual for the TV has it down like this:
> > > CS = ~(08+22+01+00+00+10)+1
>
> > > Fiasco,
> > > It is a Samsung TV.
>
> > > On Feb 12, 7:06 am, Fiasco <dgvoll...@gmail.com> wrote:
> > > > What kind of TV is it?   I just recently wrote a plugin for eventghost
> > > > for mitsubishi and a samsung, one of which required a twos compliment
> > > > checksum.
>
> > > > On Feb 12, 3:20 am, "Karl Addrison" <k...@addrison.co.uk> wrote:
>
> > > > > You are forgetting to add 1
>
> > > > > The inverse of 3B is C4 you then need to add one
>
> > > > > You will also have to be carefully when it goes over 255 if the checksum
> > > is
> > > > > only 1 byte
>
> > > > > In finding the two's complement of a binary number, the bits are
> > > inverted,
> > > > > or "flipped", by using the bitwise NOT operation; the value of 1 is then
> > > > > added to the resulting value.
>
> > > > > -----Original Message-----
> > > > > From: commandfusion@googlegroups.com
> > > [mailto:commandfusion@googlegroups.com]
>
> > > > > On Behalf Of stbluesrul
> > > > > Sent: 12 February 2010 08:22
> > > > > To: CommandFusion
> > > > > Subject: Re: Slider with Checksum
>
> > > > > For the string \x08\x22\x01\x00\x00\x10 the checksum is C5
>
> > > > > It's the 2's complement of the sum of all the values (That's what the
> > > > > manual says).  Now the way I understand this, is that it is basically
> > > > > the sum of
> > > > > (08+22+01+00+00+10) = 3B
> > > > > Then take the inverse of 3B which is C5
>
> > > > > I have an excel spreadsheet that can calculate this.  You can also do
> > > > > this in the windows scientific calculator.  I can email you
> > > > > spreadsheet if you like.
>
> > > > > Here are the steps in the windows scientific calculator:
> > > > > 1)  Scientific mode
> > > > > 2)  Set to Hex
> > > > > 3)  Set to Byte
> > > > > 4)  Add up 08+22+01+00+00+10
> > > > > 5)  Should = 3B
> > > > > 6)  To get the inverse simply click the "+/-" button and the output
> > > > > should be C5
>
> > > > > On Feb 11, 6:27 pm, Jarrod Bell <jar...@guilink.com> wrote:
> > > > > > I believe this will be possible in an upcoming release that allows for
> > > > > > math expressions within commands.
>
> > > > > > Could you post how to mathematically calculate the checksum for the
> > > > > > protocol above? Then I can ensure our math system (which is already
> > > > > > working in our beta builds) will be able to do this.
>
> > > > > > Jarrod
>
> > > > > > On Feb 12, 12:00 pm, stbluesrul <paul.l.cra...@gmail.com> wrote:
>
> > > > > > > Is it possible to use the slider with a hex command that requires a
> > > > > > > checksum at the end of it?
>
> > > > > > > This will be for direct volume on a TV.
>
> > > > > > > Examples:
> > > > > > > \x08\x22\x01\x00\x00\x00\x2B  - Volume to 0
> > > > > > > \x08\x22\x01\x00\x00\x10\xC5 -  Volume to 10
> > > > > > > \x08\x22\x01\x00\x00\x64\x71 -  Volume to 100
>
> > > > > > > The sixth byte would be replaced with [sliderval].
> > > > > > > Since that number will change to where ever the slider is moved to,
> > > it
> > > > > > > is going need a different checksum for each different volume level.
> > > > > > > The checksum is two's complement and is the seventh byte as shown.
> > > > > > > Will this be possible?
>
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