[PD] constructing ASCII messages

[Alexandros Drymonitis]

any2bytes from moocow

On Tue, May 5, 2015 at 12:43 AM, Derek Holzer <macumbista at googlemail.com>
wrote:

> Hi folks. Been a while.
>
> I'm working on a project where I must construct ASCII messages to the
> microcontroller inside a motor.
>
> It accepts messages in the following format:
>
> NODE COMMAND ARGUMENT CARRIAGERETURN (hereafter CR)
>
> For NODE 0 V 0 CR, in ASCII that would be:
>
> 48 86 53 48 13
>
> So, using the following objects:
>
> [num\  <----ARGUMENT GIVEN HERE
> |
> [spell] <----convert number to ASCII
> |
> [list prepend 48 86] <---- NODE 0, COMMAND V
> |
> [list append 13]  <----CR
> |
> [comport]
>
> I can construct and send ASCII messages where the ARGUMENT is a single
> digit.
>
> All well and good when working with single digits, but the problem is that
> the ARGUMENT is a dynamically changing number of a variable length in ASCII
> characters, and I am banging my head against the keyboard trying to work
> out how to do this. [spell] spits out the ASCII of "666" (for example) in a
> sequence, rather than as a list of three elements.
>
> 54
> 54
> 54
>
> What kind of object allows me to send a variable number of arguments which
> could be packed into a single message without "padding" (zeros in place of
> "missing" arguments)? It should allow "666" to appear as "54 54 54", or
> "1024" to appear as "49 48 50 52", or "44100" to appear as "52 52 49 48
> 48", rather than as each individual element at a time.
>
> Other options using objects like [sprintf] could also be considered. I am
> sure I am not the only person to have this problem to solve. Thanks for
> your thoughts!
>
> Pls CC with replies as I am not actively monitoring the list these days.
>
> Thanks!
> Derek
>
> --
> derek holzer
> noise.art.technology
> http://macumbista.net
>
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