Just to correct a misconception - the serial cable replacement mode provides full 2-way communication and may even be more efficient than API mode as it lacks the address data and other protocol overhead. The buffer sizes and timeouts can be configured on Maxstream and other modems for better efficiency with some trial/error or clever analysis wether it is in API mode or not. The best approach to modem efficency has already begun with the implementation of hardware flow control on the Tiny 2.x.
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http://thirdpartyoffers.juno.com/TGL2141/fc/Ioyw6i3ohxc7A4lCsAgnzVXLO9jshDT0LD45n9BTeK6VNesnv6HMId/Pascal,
did you update the cvs with Roman´s Aerocomm API files ? If so which files are affected and what will be the changes in the airframe file ?
thx
volker
> I was trying to use the whole modem buffer so that modem does not spend
> time on
> encoding small messages of only 4-12 bytes which is average message size in
> paparazzi. Also, it determines end of message by a delay in transmission host
> to modem and it adds up to very slow overall speed.
> On the same note, I found out that Pascal havent put my files on the CVS. I will
> do that tomorrow.
> Roman
-------- Original-Nachricht --------
Datum: Mon, 9 Jun 2008 10:13:47 -0700
Von: "Roman Krashanitsa" <address@hidden>
An: address@hidden
Betreff: RE: [Paparazzi-devel] modem question
Hi Chen,
In current implementation MaxStream's Xbee-type modems and Aerocomm modems
can work in two modes: 1/ serial extension mode when modem acts as a serial
cable replacement; and 2/ as an active tranceiver where it uses its own
protocol to efficiently transmit autopilot telemetry wrapped in its own
protocol. Using serial cable replacement mode you will not be able to
transmit any data on to the airplane, only receive telemetry from it.
So, to answer your question, any modem (I think) will work as a serial cable
replacement. But if you want efficiency and fault proof, and to be able to
change parameters in flight you have to implement its own protocol with
adressed packets.
Sincerely,
Roman Krashanitsa
> -----Original Message-----
> From:
> paparazzi-devel-bounces+ryk=email.arizona.edu@nongnu.org
> [mailto:paparazzi-devel-bounces+ryk=email.arizona.edu@nongnu.o
> rg] On Behalf Of C Kuo
> Sent: Monday, June 09, 2008 2:45 AM
> To: address@hidden
> Subject: [Paparazzi-devel] modem question
>
> Hi guys
>
>
> I have some question about the modem selection, I hope you
> guys can give me some help on this.
>
>
> I currently thinking about using the WI232EUR, and I was
> wondering, how do I declear this modem in the airframe xml
> file? The curretly example file I used is the funjet, which
> it declear XBee for the modem.
>
>
> I was wondering, does WI232EUR also ok with this? or I need
> a different code for it?
>
>
> Regards
>
>
> Chen
>
>
>
> _______________________________________________
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> address@hidden
> http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>
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