gumstix

Hi Brian,

On 5/31/07, Brian Gregory <bgregory@...> wrote:
> I've noticed that whenever I send an i2c-io command to my robostix the blue
> LED toggles. The strange thing is that I can't find where this happens in
> either the i2c-io code or the i2c-Bootloader code. The only place that I can
> find it is in Config-LED.h where it is commented out.

So, as long as CFG_I2C_LED_PORT and CFG_I2C_LED_MASK are defined when
the i2c-slave.c was built for the bootloader, then that's what causes
the blue LED to flash.

Did you build and program your own bootloader? Or use one of the prebuilt ones?

I know I went back and forth on whether to use it, and its possible
that one of the precompiled bootloaders had the option set even though
the checked in source code doesn't.

-- 
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/

Well i got my Verdex in today.  i also got my GPSStix and Console-vx.  My 
netCF-vx is still in route.

I've been reading over the docs on the Wiki.  it looks like i need to 
establish a USBNet connection in order to connect via SSH.  I see that with 
the console-vx I can power it and the verdex.  I also saw that initially the 
USBNet on the verdex is not running so I'll need to get that started.  To do 
that I assume i'll connect via HyperTerminal and do something?  Will that 
provide me the ability to log in and interact remote with the board?

Also I see that 3.3 to 5 volts is required.  What sort of power are you all 
providing these things?  Which is better?

I bet that it what happened, I think I loaded one on the prebuilt hex files
a while back and never replaced it. My mistake. I'll try loading one built
from source. 

BTW, I'm currently working on code to bit-bang the interface to the parallax
HM55B compass. It turns out I'd have to anyway considering it uses 4-bit
commands and a 2 11bit responses, from what I understand SPI requires 8-bit
groups. When I get it working I'll post it on here or the wiki.



 
Brian Gregory
 

-----Original Message-----
From: gumstix-users-bounces@...
[mailto:gumstix-users-bounces@...] On Behalf Of Dave
Hylands
Sent: Thursday, May 31, 2007 4:07 PM
To: General mailing list for gumstix users.
Subject: Re: [Gumstix-users] i2c-io and the blue LED

Hi Brian,

On 5/31/07, Brian Gregory <bgregory@...> wrote:
> I've noticed that whenever I send an i2c-io command to my robostix the
blue
> LED toggles. The strange thing is that I can't find where this happens in
> either the i2c-io code or the i2c-Bootloader code. The only place that I
can
> find it is in Config-LED.h where it is commented out.

So, as long as CFG_I2C_LED_PORT and CFG_I2C_LED_MASK are defined when
the i2c-slave.c was built for the bootloader, then that's what causes
the blue LED to flash.

Did you build and program your own bootloader? Or use one of the prebuilt
ones?

I know I went back and forth on whether to use it, and its possible
that one of the precompiled bootloaders had the option set even though
the checked in source code doesn't.

-- 
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/

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Hi Brian,

On 5/31/07, Brian Gregory <bgregory@...> wrote:
> I bet that it what happened, I think I loaded one on the prebuilt hex files
> a while back and never replaced it. My mistake. I'll try loading one built
> from source.
>
> BTW, I'm currently working on code to bit-bang the interface to the parallax
> HM55B compass. It turns out I'd have to anyway considering it uses 4-bit
> commands and a 2 11bit responses, from what I understand SPI requires 8-bit
> groups. When I get it working I'll post it on here or the wiki.

SPI actually doesn't specify how many bits are transferred. 8 is quite
common, but by no means the only one used. The hardware SPI on the
robostix will only do 8 bits, but if you bitbang you can do anytyhing
you want.

The sample code I gave you only transfers whole bytes, but it would be
pretty easy to modify such that you pass in uint16_t and also tell it
how many bits to read/write.

Traditional SPI is full duplex, but the HM55B is only half duplex, so
you can write a routine that sends 4 bits and reads 22 into 2 separate
16-bit variables.

-- 
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/

I would use the RS232 console to get started.  USBnet's a little harder to
get working out of the box, although not by much.  Using the console is
100%, there's almost no way to screw it up, as long as you remember to use a
null-modem cable.  As for the power supply, take a look at the Wiki, it
should answer all your questions.

On 5/31/07, Michael Caughey <michael@...> wrote:
>
> Well i got my Verdex in today.  i also got my GPSStix and Console-vx.  My
> netCF-vx is still in route.
>
> I've been reading over the docs on the Wiki.  it looks like i need to
> establish a USBNet connection in order to connect via SSH.  I see that
> with
> the console-vx I can power it and the verdex.  I also saw that initially
> the
> USBNet on the verdex is not running so I'll need to get that started.  To
> do
> that I assume i'll connect via HyperTerminal and do something?  Will that
> provide me the ability to log in and interact remote with the board?
>
> Also I see that 3.3 to 5 volts is required.  What sort of power are you
> all
> providing these things?  Which is better?
>
>
>
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by DB2 Express
> Download DB2 Express C - the FREE version of DB2 express and take
> control of your XML. No limits. Just data. Click to get it now.
> http://sourceforge.net/powerbar/db2/
> _______________________________________________
> gumstix-users mailing list
> gumstix-users@...
> https://lists.sourceforge.net/lists/listinfo/gumstix-users
>