[TI-H] Re: Connecting a gps tracking mouse to the Ti-89


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[TI-H] Re: Connecting a gps tracking mouse to the Ti-89



Sami used a pic chip and oscillator to get IR comms working... Maybe that
would work to get a good data stream.
----- Original Message -----
From: "Tristan Schaap" <tristanschaap60@hotmail.com>
To: <ti-hardware@lists.ticalc.org>
Sent: Thursday, January 30, 2003 3:43 PM
Subject: [TI-H] Re: Connecting a gps tracking mouse to the Ti-89


> Ofcourse the connection speed has to be constant, first of all, a
processor
> needs a set frequency, this is usually done using either an internal
> oscillator, or external crystal or RC circuit. Also, the speed you send at
> automatticly becomes the speed the TI receives at. (There is ofcourse a
> certain limit, 9600 Baud or something). Read the information about the
> protocols on ti-calc.org.
>
>
>
>
>
>
> >From: Olle Hedman <alh@home.se>
> >Reply-To: ti-hardware@lists.ticalc.org
> >To: ti-hardware@lists.ticalc.org
> >Subject: [TI-H] Re: Connecting a gps tracking mouse to the Ti-89
> >Date: Thu, 30 Jan 2003 21:14:04 +0100
> >
> >Mark Blome wrote:
> >
> >>Hi everybody!
> >>  some days ago I read an article about the way one can connect a simple
> >>gps-receiver to a pda via the serial port. I thought: this should be
> >>possible with the Ti-89 as well!
> >>As I am a novice either in Ti89 hardware as well as in its assembly
> >>programing, I am not sure if Ti-89s hardware in generell is cabable of
> >>receiving gps-data via its link cable! For example: the gps serial port
> >>will send the data with 4800 bits per sec. Is there a way to tell the
> >>Ti-89 to receive data with a specific transfer rate? Is there a kind of
a
> >>time counter in the calculator (eg for speed calculations etc.)?
> >>  Thanks for any help!
> >>  Mark
> >
> >Unfortunatly there is no way of getting true real time on most calcs.
> >They all drift in speed depending on battry and temperature.
> >I think some calcs like the 83+ (maybe silver edition is needed) and v200
> >has some kind of realtime circuit in it.
> >I don't  know how usable it is though.
> >
> >--Olle
>
>
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>
>




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