Re: [Gumstix-users] Some Newbie-Questions

[Craig H. <cr...@hu...>]

On Mar 4, 2005, at 3:09 PM, ca...@t-... wrote:

> i just bought two gumstixs (one with Bluetooth (basix 400f-bt) and one=20=

> connex 400g).
>  Both boot fine and i see console output via serial port. I have a few=20=

> questions:
> =A0
> 1) The 400f-bt displays at startup:
>  U-Boot 1.1.2 (Feb 11 2005 - 12:59:06)
> *** Warning - bad CRC, using default environment
> =A0
> What does it mean ? How can i correct this ? The 400g doesn't display=20=

> this.

This means that you've never done a "saveenv" in u-boot.  It's a=20
warning not an error, and is fully expected.  The "***" probably makes=20=

it look more serious than it is -- I'll update the message to be less=20
alarming and more explanative.

> 2) To reduce costs i have not ordered any accessory. Ok, power supply,=20=

> serial cable was no problem.
> But: Bluetooth antenna and USB cable. For Bluetooth antenna i tried to=20=

> hold a short cable to the antenna pin, and it seems working, but no=20
> final solutions. Can anyone tell me the exact name of these connectors=20=

> ? USB are normal mini USB ? Type A ?

the antenna connector is an "MMCX" connector.  the USB is the normal=20
skinny USB connector.

> =A03) I tried out the delivered Etherstix. I connected it to the =
connex=20
> 400g and the waysmall STUART. But it doesn't seem to react. Gumstix=20
> requested no IP-address from my router (which has DHCP enabled). I=20
> think i even haven't seen any light (10 / 100) at my router. Anything=20=

> special with it ? Automatically enabled during startup ? Is a Ethernet=20=

> cross cable needed ?

the default configuration doesn't bring up eth0 by default.  You can=20
bring it up manually from the console using

ifup eth0

or to bring it up automatically at boot, modify /etc/network/interfaces=20=

to add the line

auto eth0

> 4) I searched for hcidump in filesystem, but haven't found it. Is it=20=

> too big ? At least only the raw debugging would be nice to have.=20
> Anyone already tried it ? Or is there another way to dump HCI data ?

It's not there, but you can build it from the buildroot and add it in=20
by adding the top-level TARGET bluez-hcidump.  It's about 66kB=20
uncompressed, looks like about 43k in the filesystem.  If you haven't=20
already done so, you should check out the buildroot from subversion and=20=

poke around in there to see what all is available to optionally=20
install.

> 5) Putting the waysmall together to connex 400g and etherstix seems to=20=

> be not very stable (mechanically). Has someone a tip how=A0to make it =
a=20
> bit more stable ? Must i put a paper between each f two board, so i=20
> get no shortcuts ?=A0

We're working on a mechanical bracket to hold cards separated, but=20
together.  For now, I'm not sure what all people out there might be=20
using.  I've seen one customer who rigged up a u-clamp with little=20
rubber pads.  Gordon tends to use these plastic clip things.  I just=20
try to breath shallowly (and keep my 18 month old daughter away from=20
grabbing them).

C