I have sent three emails to the Trimble's sales manager, Brad Lynch,
with no answer. Does anybody know where I can buy the Lassen iQ gps
module and antennas in the USA?

thanks in advance,
Vital

Sipke de Leeuw wrote:

>Hello,
>
>I am looking for a RS232 cable that can connect the gameboy advance serial
>port to a PC RS232 port. I think that the voltages must be converted from
>0 - +3V to something like -5V - +5V. Does anyone know where a can buy such a
>cable with level shifter?
>
>Any help will be greatly appreciated.
>
>
>
http://darkfader.net/gba/main.html#GbaTool

i have never seen such a cable in a shop,
but you can easliy build one:


http://darkfader.net/gba/files/UART.gif

greetz david
On Thursday 31 March 2005 09:32, Sipke de Leeuw wrote:
> Hello,
>
> I am looking for a RS232 cable that can connect the gameboy advance serial
> port to a PC RS232 port. I think that the voltages must be converted from
> 0 - +3V to something like -5V - +5V. Does anyone know where a can buy such
> a cable with level shifter?
>
> Any help will be greatly appreciated.
>
>
> Best regards,
> Sipke
>
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>

>    Date: Wed, 30 Mar 2005 14:44:19 -0000
>    From: "Vital" <vitalhb@...>
> Subject: Re: GPS module
>
> Thanks for the information. I will use the Lassen iQ module, that
> consumes a little less power than the SQ and will use an external
> antenna. I was looking for a module with an integrated antenna but,
> as you told, the metal shield would cause problems. Anyway, I would
> need an external antenna for use in vehicles.

Please let me know how it works out - I have used the SQ module
externally connected to the link port in uart mode with the trimble
compact patch antenna. I found that I could not get an initial fix on
moving cold start. It took several minutes for initial fix on
stationary cold start, and after that was Ok. I did not implement warm
start functionality, so do not know how that improves the situation.

check out www.pixelproc.net - gives idea of the rough dimensions of the
sq module and the patch antenna relative to the GBA SP dimensions

regards
Hari




__________________________________
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Yahoo! Small Business - Try our new resources site!
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Hello,

I am looking for a RS232 cable that can connect the gameboy advance serial
port to a PC RS232 port. I think that the voltages must be converted from
0 - +3V to something like -5V - +5V. Does anyone know where a can buy such a
cable with level shifter?

Any help will be greatly appreciated.


Best regards,
Sipke

>The first issue I see is the voltage difference - midi is a 5V interface
>whereas the GBA comm system is 3V.  While this isn't necessarily a problem
>(as the nocash xboot cable works fine), it could potentially hurt the GBA's
>comm system.

Yes. I was hestitating over this. I was aiming
for a really-simply-system®, so that people off
the web could just hack open a midi cable and
plug it into the GBA without a PIC. But even with
a couple of resistors and whatnot we're already
talking about soldering, i.e. for
people-in-the-know, so I might as well go with a
PIC solution: cleaner, easier to program (just
use the 38400 UART mode and let the PIC do all
the work).

>An external hardware system that buffers and retransmits data is
>relatively simple to create, and much less of a pain to code for. It is also
>possible to do the communicaitions on the gba itself. When in general
>purpose comms mode, the GBA can be instructed to interrupt when SI
>transitions from high to low, which will detect the beginning of an incoming
>UART transmission.

Yes. I was just going through the skimpy docs
on-line on interrupts just for this purpose. I
think I've got it down now.

>   After that, at 31250bps, the gba has approximately 537
>cycles per bit to deal with incoming data, so many means of collecting the
>data (timer interrupts, or just wait loops) could be used.
>
>In my opinion it doesn't really make much difference whether the
>transmission and receiving is done in hardware or software... hardware has
>the potential to be a bit more stable, but software won't require as much
>external work.

Not everyone has access to some sort of external
programmable circuit. I'll see with my time-frame
what's the easiest. Thanx for the info.

--
/*

// Douglas Edric Stanley
<destanley@...>

// Artiste
http://www.abstractmachine.net

// Professeur d'Arts numeriques, L'école supérieure d'art d'Aix-en-provence
http://www.ecole-art-aix.fr/hypermedia/

// Chercheur, Laboratoire Esthétique de l'interactivité, Université de Paris 8
http://www.ciren.org

*/

Thanks for the information. I will use the Lassen iQ module, that
consumes a little less power than the SQ and will use an external
antenna. I was looking for a module with an integrated antenna but,
as you told, the metal shield would cause problems. Anyway, I would
need an external antenna for use in vehicles.

The Lassen iQ seens to be easy to buy samples.
The only thing that would be better than the Lassen iQ would be a
module with a SPI interface. It would save me of implementing an UART
in my CPLD.

thank you
Vital

--- In gbadev@yahoogroups.com, Hari Nair <harinnair@y...> wrote:
>
> > I recently put a Trimble Lassen SQ module onto
> > to link socket of a Gameboy DS.
> >
> > I found that when the screen was folded right
> > back it masked the signal from the embedded antenna.
> >
> > So... where is your antenna going to be? The cartridge
> > slot is shielded with a metal screen on at least one
> > of the GBA's.
> >
>
> The Trimble Lassen SQ (or newer IQ model) does not have an embedded
> antenna. Check it out (www.google.com)  :-)
>
> regards
> Hari

There are a few things that will need to be addressed when connecting a midi
system to the GBA...
The first issue I see is the voltage difference - midi is a 5V interface
whereas the GBA comm system is 3V.  While this isn't necessarily a problem
(as the nocash xboot cable works fine), it could potentially hurt the GBA's
comm system.
As far as whether the communications should be handled in software or
hardware, the only difference is what kind of a challenge the implementation
is.  An external hardware system that buffers and retransmits data is
relatively simple to create, and much less of a pain to code for. It is also
possible to do the communicaitions on the gba itself. When in general
purpose comms mode, the GBA can be instructed to interrupt when SI
transitions from high to low, which will detect the beginning of an incoming
UART transmission.  After that, at 31250bps, the gba has approximately 537
cycles per bit to deal with incoming data, so many means of collecting the
data (timer interrupts, or just wait loops) could be used.

In my opinion it doesn't really make much difference whether the
transmission and receiving is done in hardware or software... hardware has
the potential to be a bit more stable, but software won't require as much
external work.
-Stephen

----- Original Message -----
From: "douglas edric stanley" <destanley@...>
To: <gbadev@yahoogroups.com>
Sent: Tuesday, March 29, 2005 8:59 AM
Subject: [gbadev] MIDI->GBA interface




I'm trying to get MIDI into the GBA through the
serial interface. I've done lots of experimenting
with this serial port (cf.
http://hypermedia.loeil.org/playmobile/user/douglas/)
but getting MIDI in looks like it's going to be a
little uncomfortable. Has anyone already done
this? (I already know of all the GBC MIDI
projects -- pushpin & firestarter -- I'm
interested in a GBA-specific solution).

The main problem is that MIDI working at 31250
baud whereas the GBA supports only 9600, 38400,
57600, and 115200.

I was thinking of using the serial port in
General-Purpose mode, and trying to figure out
all the timing. This is cleaner than building a
PIC-based MIDI->UART converter, but I don't
really have any experience with General-Purpose
so I wanted to get someone's (anyone's?) opinion
on this matter before getting my hands dirty.
--
/*

// Douglas Edric Stanley
<destanley@...>

// Artiste
http://www.abstractmachine.net

// Professeur d'Arts numeriques, L'école supérieure d'art d'Aix-en-provence
http://www.ecole-art-aix.fr/hypermedia/

// Chercheur, Laboratoire Esthétique de l'interactivité, Université de Paris
8
http://www.ciren.org

*/






Yahoo! Groups Links

I'm trying to get MIDI into the GBA through the
serial interface. I've done lots of experimenting
with this serial port (cf.
http://hypermedia.loeil.org/playmobile/user/douglas/)
but getting MIDI in looks like it's going to be a
little uncomfortable. Has anyone already done
this? (I already know of all the GBC MIDI
projects -- pushpin & firestarter -- I'm
interested in a GBA-specific solution).

The main problem is that MIDI working at 31250
baud whereas the GBA supports only 9600, 38400,
57600, and 115200.

I was thinking of using the serial port in
General-Purpose mode, and trying to figure out
all the timing. This is cleaner than building a
PIC-based MIDI->UART converter, but I don't
really have any experience with General-Purpose
so I wanted to get someone's (anyone's?) opinion
on this matter before getting my hands dirty.
--
/*

// Douglas Edric Stanley
<destanley@...>

// Artiste
http://www.abstractmachine.net

// Professeur d'Arts numeriques, L'école supérieure d'art d'Aix-en-provence
http://www.ecole-art-aix.fr/hypermedia/

// Chercheur, Laboratoire Esthétique de l'interactivité, Université de Paris 8
http://www.ciren.org

*/

> I recently put a Trimble Lassen SQ module onto
> to link socket of a Gameboy DS.
>
> I found that when the screen was folded right
> back it masked the signal from the embedded antenna.
>
> So... where is your antenna going to be? The cartridge
> slot is shielded with a metal screen on at least one
> of the GBA's.
>

The Trimble Lassen SQ (or newer IQ model) does not have an embedded
antenna. Check it out (www.google.com)  :-)

regards
Hari

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around
http://mail.yahoo.com

Of course I meant to say GBA SP (not DS)

--- In gbadev@yahoogroups.com, "gb_feedback" <gb_feedback@y...> wrote:
>
>
> I recently put a Trimble Lassen SQ module onto
> to link socket of a Gameboy DS.
>
> I found that when the screen was folded right
> back it masked the signal from the embedded antenna.
>
> So... where is your antenna going to be? The cartridge
> slot is shielded with a metal screen on at least one
> of the GBA's.

Hey, has anybody done any RTC programming with an EFA cart?  If so how
and what did you do? Does anybody out there know where I could get
some info on this? EFA's website has no info.  If I want to get the
RTC data from a memaddress, does it even matter which cart I use, do
various flash carts have this in different places or same places?

Any info would be great, Thanks!

The only way to get to use one without having official developer status is
join a Nintendo approved games programmning course as far as I'm aware..

----- Original Message -----
From: "R. W. Schneider" <xcentrix_2@...>
To: <gbadev@yahoogroups.com>
Sent: Friday, March 25, 2005 2:02 AM
Subject: Re: [gbadev] Official ProDG GBA Devkit For Sale At Bargain Price


>
>
> Hello.  My name is William.
> Question,  I read the requirements in order to
> purchase the ProDG for GameBoy Advance.  I am
> interested in getting one but do not want to go
> throught thier hassel.  Is there another way for
> programmers that are do not have the developers status
> get one?
> Thanks
> William
>
> --- Marcus Lynn <marcusl@...> wrote:
> >
> > Hi
> >
> > I've got a ProDG GBA Kit
> > (http://www.snsys.com/GameBoyAdvance/ProDG.htm) ,
> > boxed as new to sell..
> >
> > Offers welcome
> >
> > Marcus Lynn
> > 4x4 Offroaders/Shaun Murray Wakeboarding
> >
> >
> >
> >
>
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! Small Business - Try our new resources site!
> http://smallbusiness.yahoo.com/resources/
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>

I recently put a Trimble Lassen SQ module onto
to link socket of a Gameboy DS.

I found that when the screen was folded right
back it masked the signal from the embedded antenna.

So... where is your antenna going to be? The cartridge
slot is shielded with a metal screen on at least one
of the GBA's.

Hey, I'm thinking about making a clock for GBA that would display FF
XI Vana'diel time (Ferry, Airship, Guild schedules, etc.) Anybody
out there interested in somethin like this? Does anybody out there
know of any good time libraries (prefereably to work with HAM, that
has funcs like one that will give me the difference of two dates in
seconds, etc?

Thanks

Travis Brown

So what the price and does it come with serial number etc.
--- In gbadev@yahoogroups.com, "Marcus Lynn" <marcusl@n...> wrote:
>
> Hi
>
> I've got a ProDG GBA Kit
(http://www.snsys.com/GameBoyAdvance/ProDG.htm) ,
> boxed as new to sell..
>
> Offers welcome
>
> Marcus Lynn
> 4x4 Offroaders/Shaun Murray Wakeboarding

Hello.  My name is William.
Question,  I read the requirements in order to
purchase the ProDG for GameBoy Advance.  I am
interested in getting one but do not want to go
throught thier hassel.  Is there another way for
programmers that are do not have the developers status
get one?
Thanks
William

--- Marcus Lynn <marcusl@...> wrote:
>
> Hi
>
> I've got a ProDG GBA Kit
> (http://www.snsys.com/GameBoyAdvance/ProDG.htm) ,
> boxed as new to sell..
>
> Offers welcome
>
> Marcus Lynn
> 4x4 Offroaders/Shaun Murray Wakeboarding
>
>
>
>



__________________________________
Do you Yahoo!?
Yahoo! Small Business - Try our new resources site!
http://smallbusiness.yahoo.com/resources/

Hi

I've got a ProDG GBA Kit (http://www.snsys.com/GameBoyAdvance/ProDG.htm) ,
boxed as new to sell..

Offers welcome

Marcus Lynn
4x4 Offroaders/Shaun Murray Wakeboarding

> I am looking for a "very" small GPS module to include in a GBA
> cartridge. So far, the smallest module I have found is the FS Oncore,
>

I know of Trimble Lassen SQ module. The current part is 12 channel,
3.3V, serial interface, NMEA ASCII or proprietary binary protocol. You
can contact Trimble directly for purchasing samples.

regards
Hari



__________________________________
Do you Yahoo!?
Yahoo! Small Business - Try our new resources site!
http://smallbusiness.yahoo.com/resources/

Jason,

Thanks for the information. This module is almost what I am looking
for, except for the supply voltage. If I do not find a 3V module, I
can use a charge pump to produce the +5V.

Best regards,
Vital

--- In gbadev@yahoogroups.com, Jason Rausch <lists@k...> wrote:
>
> The Deluo GPS Lite
> http://www.deluoelectronics.com/customer/product.php?
productid=57&tracking=bestbang
>
> Might be just what you are looking for.  A friend just
> bought one for a APRS project we're working on.  Its
> incredibly small.  About 1.5 inches square.  The case
> can be opened and the board comes out.  Serial
> interface, runs on 5VDC though.
>
> Jason KE4NYV
> www.ke4nyv.com
> RPC Electronics
> www.rpc-electronics.com
>
>
> --- Vital <vitalhb@u...> wrote:
>
> >
> >
> >
> > Hello,
> >
> > I am looking for a "very" small GPS module to
> > include in a GBA
> > cartridge. So far, the smallest module I have found
> > is the FS Oncore,
> > from Motorola
> >
> (http://www.motorola.com/ies/GPS/products_positioning.html),
> > but
> > there may be other options that I do not know. I
> > still do not know if
> > it is possible to buy the Motorola's module in
> > fairly low quantities.
> > I would like to find a module that requires only 3V
> > and low power and
> > has serial or SPI interface.
> >
> > Any help will be greatly appreciated.
> >
> > thanks,
> > Vital
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >     gbadev-unsubscribe@yahoogroups.com
> >
> >
> >
> >
> >
> >
>
>
> Jason KE4NYV
> RPC Electronics
> www.rpc-electronics.com

Hi,

----- Original Message -----
From: Vital <vitalhb@...>
Date: Wednesday, March 23, 2005 11:56 am
Subject: [gbadev] GPS module

>
>
>
> Hello,
>
> I am looking for a "very" small GPS module to include in a GBA
> cartridge. So far, the smallest module I have found is the FS
> Oncore,
> from Motorola
> (http://www.motorola.com/ies/GPS/products_positioning.html), but
> there may be other options that I do not know. I still do not know
> if
> it is possible to buy the Motorola's module in fairly low quantities.
> I would like to find a module that requires only 3V and low power
> and
> has serial or SPI interface.

Check out this one:
"http://www.sparkfun.com/shop/index.php?shop=1&cart=204518&cat=63&"

cheers,
Jamie

The Deluo GPS Lite
http://www.deluoelectronics.com/customer/product.php?productid=57&tracking=bestb\
ang

Might be just what you are looking for.  A friend just
bought one for a APRS project we're working on.  Its
incredibly small.  About 1.5 inches square.  The case
can be opened and the board comes out.  Serial
interface, runs on 5VDC though.

Jason KE4NYV
www.ke4nyv.com
RPC Electronics
www.rpc-electronics.com


--- Vital <vitalhb@...> wrote:

>
>
>
> Hello,
>
> I am looking for a "very" small GPS module to
> include in a GBA
> cartridge. So far, the smallest module I have found
> is the FS Oncore,
> from Motorola
>
(http://www.motorola.com/ies/GPS/products_positioning.html),
> but
> there may be other options that I do not know. I
> still do not know if
> it is possible to buy the Motorola's module in
> fairly low quantities.
> I would like to find a module that requires only 3V
> and low power and
> has serial or SPI interface.
>
> Any help will be greatly appreciated.
>
> thanks,
> Vital
>
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>     gbadev-unsubscribe@yahoogroups.com
>
>
>
>
>
>


Jason KE4NYV
RPC Electronics
www.rpc-electronics.com

Hello,

I am looking for a "very" small GPS module to include in a GBA
cartridge. So far, the smallest module I have found is the FS Oncore,
from Motorola
(http://www.motorola.com/ies/GPS/products_positioning.html), but
there may be other options that I do not know. I still do not know if
it is possible to buy the Motorola's module in fairly low quantities.
I would like to find a module that requires only 3V and low power and
has serial or SPI interface.

Any help will be greatly appreciated.

thanks,
Vital

Yeah they accept composite inputs so there shouldn't be a problem.

amitpal singh wrote:

>
> Hi there,
>        Can I use a GBA Tv Tuner to connect to a
> wireless camera receiver and display the video on the
> gameboy?
>
> Amitpal
>
>
>
> __________________________________
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> Yahoo! Small Business - Try our new resources site!
> http://smallbusiness.yahoo.com/resources/
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>
>     * Your use of Yahoo! Groups is subject to the Yahoo! Terms of
>       Service <http://docs.yahoo.com/info/terms/>.
>
>

yah, my gba tv tuner comes with an adapter for
standard RCA video in, as long as your recevier has
that, your good to go.

travis
--- amitpal singh <lhayher@...> wrote:
>
> Hi there,
>        Can I use a GBA Tv Tuner to connect to a
> wireless camera receiver and display the video on
> the
> gameboy?
>
> Amitpal
>
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! Small Business - Try our new resources site!
> http://smallbusiness.yahoo.com/resources/
>
>
>
>

__________________________________________________
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Hi there,
        Can I use a GBA Tv Tuner to connect to a
wireless camera receiver and display the video on the
gameboy?

Amitpal



__________________________________
Do you Yahoo!?
Yahoo! Small Business - Try our new resources site!
http://smallbusiness.yahoo.com/resources/

From what I can see, it communicates with the GameBoy in some sort of
digital-analog mix, and the image is interlaced.  However, the voltages
to the actual LCD cells are fed in by the main board.  These voltages
must be preceisly right (to an acccuracy somewhere below 0.1 mV; I
measured the min and max possible settings and they read as the same
value) or the LCD will flicker a lot, produce a terrible image and wear
out more quickly.  There's a potentiometer on the main board that
controls this voltage.  I'm not sure but I think it's kind of a DC
offset.  I would think that this connects to the LCD as sort of a
driving current, which is modulated with the signal and sent to the cells.

I've never seen a good description of the GBA LCD circuitry, but it's
almost certainly based on the old GameBoy one.  The original GB and GB
Pocket LCD communication is based in part on TV signal standards
(interlaced, refresh rate).  Those screens could show 4 shades of grey,
which were encoded in two seperate signals, as a 2-bit digital value for
each pixel.  The GBA can display color at 16 bit color depth.  I doubt
that it sends 16 bits of data to the screen per pixel; my best guess is
that it uses something like RGB component video.

Maybe you or someone else can examine the signal sent by the GBA with an
oscilloscope and try to make some sense of it.  It might be possible to
hook the camera reciever up to it directly if it has a component video
output.  The refresh rate and (presumably) signal type are basically
correct, though you'd have to remove a few lines (TV is about 480 lines,
GBA is 160 lines) and probably split the H- and V-sync signals out.

Your best bet is probably a rather roundabout solution:  Get one of
those GBA TV tuners and connect a TV format signal to the A/V in jack.
I have the old GBA TV tuner that they made before the SP was released,
and the SP won't fit in it.  I had to chisel a bit out of the case
around the top of the GB connector and cut a bit out a the connector
board.  Luckily, this only broke one trace wire, which I re-connected
with some solder and wrapping wire.

(On a side note:  Why even use a GBA SP screen?  There are plenty of
good small backlit TFT video monitors out there.  For instance, I
recently saw a protable combination GameCube controller and screen
(about GBA sized) for $40.)

-Joe


amitpal singh wrote:

>Hi everyone,
>            I'm currently working on a project for
>which i havet o connect a wireless camera receiver to
>the gameboy advance sp lcd screen. I was wondering if
>anyone could help me out with this issue. i have no
>schematic of the gameboy lcd neither the pinouts of
>it.
>i really appreciate any help i can get
>
>thanks
>Amit

That's not true. Modes 3 and 5 are paletteless, and can display all 32,768
colors, or rather Mode 3 can, because Mode 5 doesn't have that many pixels.

John Sensebe
jsensebe@...

Quantum Mechanics are God's way of making sure we never really know what's
going on.

----- Original Message -----
From: "Gary Tsang" <garytsang@...>
To: <gbadev@yahoogroups.com>
Sent: Wednesday, March 16, 2005 8:43 PM
Subject: Re: [gbadev] Converting 32k colors images




the gba is able to display 32k distinct colors, but unfortunately it
can only show 256 of the 32k different colors at the same time.  The
limit is not the gba's ability to show colors, but that its palette
memory is only 256*16bit large.

I hope this is helpful.

Gary


[moderator's note: this is not entirely true. please check:
http://www.work.de/nocash/gbatek.htm#lcdvrambitmapbgmodes
and
http://www.thepernproject.com/tutorials/gba/day_2.html#2
for information on the gba's bitmapped display modes]




On Mar 16, 2005, at 2:10 PM, Bruce wrote:

>
>  Hi folks,
>
>  Im beginning in GBA dev and saw that it supports up to 32.768
>  colors.
>  But most tools I found to convert images to raw format or C source
>  code only supports 256 colors at max.
>
>  I was wondering how to convert a full 32k color image to a GBA
>  format.
>
>  Any help on this ?
>
>  Thanks
>  Bruce
>
>  ________________________________________________
>  Message sent using
>  OpenGL.com.br Webmail 2.7.5 Beta1
>
>
>
>
>
>
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> <image.tiff>
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the gba is able to display 32k distinct colors, but unfortunately it
can only show 256 of the 32k different colors at the same time.  The
limit is not the gba's ability to show colors, but that its palette
memory is only 256*16bit large.

I hope this is helpful.

Gary


[moderator's note: this is not entirely true. please check:
http://www.work.de/nocash/gbatek.htm#lcdvrambitmapbgmodes
and
http://www.thepernproject.com/tutorials/gba/day_2.html#2
for information on the gba's bitmapped display modes]




On Mar 16, 2005, at 2:10 PM, Bruce wrote:

>
>  Hi folks,
>
>  Im beginning in GBA dev and saw that it supports up to 32.768
>  colors.
>  But most tools I found to convert images to raw format or C source
>  code only supports 256 colors at max.
>
>  I was wondering how to convert a full 32k color image to a GBA
>  format.
>
>  Any help on this ?
>
>  Thanks
>  Bruce
>
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Hi folks,

Im beginning in GBA dev and saw that it supports up to 32.768
colors.
But most tools I found to convert images to raw format or C source
code only supports 256 colors at max.

I was wondering how to convert a full 32k color image to a GBA
format.

Any help on this ?

Thanks
Bruce

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Message sent using
OpenGL.com.br Webmail 2.7.5 Beta1