gumstix

Just an update,
	I got the serial console nearly working via the robostix.
Only problem now is that it dosn't appear to accept keyborad input from
minicom.I have had this working on the tweener and only change it to my
usb serial device port.
I have tried the suggested 10K pull up on the RX, but that didn't work,
any suggestions?

Jason


On Wed, 2007-07-04 at 18:59 +1000, Jason Cox wrote:
> Hi all,
> 	as I just killed my tweener (3.3v reg is in thermal run away), is it
> posible to get the console of the robostix? I have a 3.3v rs232 serial
> cable and a plug that i use for the "gumstix" port on the robostix.
> 
> Jason
> 
> 
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Hi Jason,

>         I got the serial console nearly working via the robostix.
> Only problem now is that it dosn't appear to accept keyborad input from
> minicom.I have had this working on the tweener and only change it to my
> usb serial device port.
> I have tried the suggested 10K pull up on the RX, but that didn't work,
> any suggestions?

So the tweener is out the picture now? Just the robostix and gumstix?

The other problem is where are you getting the +5 for the rs232
converter. The newer robostix have been fixed (R1131), but the older
versions but the older versions provide VCC5 on the gumstix connector
rather than V_BATT.
See: <http://docswiki.gumstix.com/Robostix_modifications#Getting_the_console_to_work_during_boot_.28General_Description.29>
for all of the gory details.

If you grab your power from the UARTS connector, then it uses V_BATT
on all 4 +5 locations.

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

David,
	I have a R1131 robostix and the problem is that it boots,but I dont
seam to be able to log into the  gumstix once the login prompt appears.
I am running a usb 5v rs232 converter using just 3 wirers to the console
port. I havent connect up the +5v from the converter to the gumstix as i
thought i wouldn't need to. Adding in the 10K pull up just seem to lock
it up ( also tried 15K, but it made no diff ).

The tweener is compleatly out unless there is 3.3v on the conector to
try and power up the rs232 ( last resort as I don't know the condition
of the  converter ).

Jason



On Wed, 2007-07-04 at 07:10 -0700, Dave Hylands wrote:
> Hi Jason,
> 
> >         I got the serial console nearly working via the robostix.
> > Only problem now is that it dosn't appear to accept keyborad input from
> > minicom.I have had this working on the tweener and only change it to my
> > usb serial device port.
> > I have tried the suggested 10K pull up on the RX, but that didn't work,
> > any suggestions?
> 
> So the tweener is out the picture now? Just the robostix and gumstix?
> 
> The other problem is where are you getting the +5 for the rs232
> converter. The newer robostix have been fixed (R1131), but the older
> versions but the older versions provide VCC5 on the gumstix connector
> rather than V_BATT.
> See: <http://docswiki.gumstix.com/Robostix_modifications#Getting_the_console_to_work_during_boot_.28General_Description.29>
> for all of the gory details.
> 
> If you grab your power from the UARTS connector, then it uses V_BATT
> on all 4 +5 locations.
>

Hi Jason,

>        I have a R1131 robostix and the problem is that it boots,but I dont
> seam to be able to log into the  gumstix once the login prompt appears.
> I am running a usb 5v rs232 converter using just 3 wirers to the console
> port. I havent connect up the +5v from the converter to the gumstix as i
> thought i wouldn't need to. Adding in the 10K pull up just seem to lock
> it up ( also tried 15K, but it made no diff ).
>
> The tweener is compleatly out unless there is 3.3v on the conector to
> try and power up the rs232 ( last resort as I don't know the condition
> of the  converter ).

The rs232 converter needs to get its power from somewhere.

If it's one of the USB-to-logic-level serial varities then they
normally power themselves from the USB bus. RS232-to-logic-level
convertes typically need to get their power from some other source
(like the V_BATT pin on the 4-pin GUMSTIX connector).

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

Dave,
	Yes its a usb powered converter. 
I ahve tested he usb serial apter with a GPS and all seems to work.I
just dont  seem to be able to get the conole to echo back:(
the pl2303 will show the console but dosn't seem to send daa to it.
Jason


On Wed, 2007-07-04 at 16:23 -0700, Dave Hylands wrote:
> Hi Jason,
> 
> >        I have a R1131 robostix and the problem is that it boots,but I dont
> > seam to be able to log into the  gumstix once the login prompt appears.
> > I am running a usb 5v rs232 converter using just 3 wirers to the console
> > port. I havent connect up the +5v from the converter to the gumstix as i
> > thought i wouldn't need to. Adding in the 10K pull up just seem to lock
> > it up ( also tried 15K, but it made no diff ).
> >
> > The tweener is compleatly out unless there is 3.3v on the conector to
> > try and power up the rs232 ( last resort as I don't know the condition
> > of the  converter ).
> 
> The rs232 converter needs to get its power from somewhere.
> 
> If it's one of the USB-to-logic-level serial varities then they
> normally power themselves from the USB bus. RS232-to-logic-level
> convertes typically need to get their power from some other source
> (like the V_BATT pin on the 4-pin GUMSTIX connector).
>

Hi Jason,

>        Yes its a usb powered converter.
> I ahve tested he usb serial apter with a GPS and all seems to work.I
> just dont  seem to be able to get the conole to echo back:(
> the pl2303 will show the console but dosn't seem to send daa to it.

OK - so just to be really clear, you don't have the tweener connected
when you're doing this?

Which version of buildroot are you using?

Which version of u-boot do you have?

Do you have the verdex or connex? (or basix?)

I'm trying to figure out if the values that u-boot initializes the
GPIO pins to could be affecting your behaviour.

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

Hi Jason,

> I'm trying to figure out if the values that u-boot initializes the
> GPIO pins to could be affecting your behaviour.

So, looking at the u-boot settings, it seems that u-boot 1.2.0
initializes things differently from 1.1.4.

In order for the console to work on the robostix, we need LDD14 to be
an output which is driven low.

In u-boot-1.2.0, it seems that LDD14 (aka GPIO 72) is configured as an
input. Since the robostix provides a pullup resistor on the LDD14
line, this means that the 3.3v to 5v voltage converter will be
disabled, which means that the console shouldn't work at all.

I need to do some tests when I get home and try a few things out.

So, if you're using a verdex, then this probably explains what you're seeing.

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

Dave,
	I was a default image off the web from sf.net and the u-boot is 1.1.4.
problem is that i cannot upgrade it to the latest without a serial port.
RMA/ re flash is out as I am in Australia and freight back would be
high.
Jason

On Wed, 2007-07-04 at 18:59 -0700, Dave Hylands wrote:
> Hi Jason,
> 
> > I'm trying to figure out if the values that u-boot initializes the
> > GPIO pins to could be affecting your behaviour.
> 
> So, looking at the u-boot settings, it seems that u-boot 1.2.0
> initializes things differently from 1.1.4.
> 
> In order for the console to work on the robostix, we need LDD14 to be
> an output which is driven low.
> 
> In u-boot-1.2.0, it seems that LDD14 (aka GPIO 72) is configured as an
> input. Since the robostix provides a pullup resistor on the LDD14
> line, this means that the 3.3v to 5v voltage converter will be
> disabled, which means that the console shouldn't work at all.
> 
> I need to do some tests when I get home and try a few things out.
> 
> So, if you're using a verdex, then this probably explains what you're seeing.
>

Dave,
	turns out it was usb odd balls :)
I just built a MAX232 converter with out problems and now i am moving
onto setting up my MA701 wifi.The doc's dont realy help by the looks of
it
Jason


On Thu, 2007-07-05 at 12:26 +1000, Jason Cox wrote:
> Dave,
> 	I was a default image off the web from sf.net and the u-boot is 1.1.4.
> problem is that i cannot upgrade it to the latest without a serial port.
> RMA/ re flash is out as I am in Australia and freight back would be
> high.
> Jason
> 
> On Wed, 2007-07-04 at 18:59 -0700, Dave Hylands wrote:
> > Hi Jason,
> > 
> > > I'm trying to figure out if the values that u-boot initializes the
> > > GPIO pins to could be affecting your behaviour.
> > 
> > So, looking at the u-boot settings, it seems that u-boot 1.2.0
> > initializes things differently from 1.1.4.
> > 
> > In order for the console to work on the robostix, we need LDD14 to be
> > an output which is driven low.
> > 
> > In u-boot-1.2.0, it seems that LDD14 (aka GPIO 72) is configured as an
> > input. Since the robostix provides a pullup resistor on the LDD14
> > line, this means that the 3.3v to 5v voltage converter will be
> > disabled, which means that the console shouldn't work at all.
> > 
> > I need to do some tests when I get home and try a few things out.
> > 
> > So, if you're using a verdex, then this probably explains what you're seeing.
> > 
> 
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by DB2 Express
> Download DB2 Express C - the FREE version of DB2 express and take
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>

Hi Jason,

>         I was a default image off the web from sf.net and the u-boot is 1.1.4.
> problem is that i cannot upgrade it to the latest without a serial port.
> RMA/ re flash is out as I am in Australia and freight back would be
> high.

Hmm. I took my rev 1131 robostix with a connex, and loaded the 1161
factory u-boot and 1161 rootfs.

I used this adapter:
<http://www.sparkfun.com/commerce/product_info.php?products_id=718>

and connected Tx, Rx, and Gnd, and everything worked fine.

The 10k resistor patch wasn't applied, and is in fact only needed is
no serial adapter is used.

If you connect the Tx to the Rx on your usb-to-serial adapter can you
see what you type? And then disconnect the Tx from Rx and no longer
see what you type (just wanting to make sure that usb-to-serial
adapter is working properly).

If you have a problem, it's most likely to be with the robostix and
not the gumstix.

Aside: In reviewing all of this stuff, I did discover a potential
problem. The LDD11 pin is being driven by the robostix and by the
gumstix. The input to the LDD11 line comes from the robostix, but when
the robostix isn't running then that pin is floating.

So, I think we need to change a couple of the u-boot defaults, and
ideally, the ATM_IRQ line should have a pullup(or pulldown)  resistor
on it, to keep it from floating.

I see your reply came in as I was typing this, but I'm still going to
send this anyways.

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

Dave,
	I ahve the wifi now so i can pack away my serial for a while.
the only things I had to do were in
/etc/network/interfaces

auto wlan0
iface wlan0 inet dhcp
      pre-up /sbin/iwconfig $IFACE essid default power on txpower auto \
ap auto mode managed

and /etc/modprobe.conf change 
alias mwlan0 cfio
to
alias wlan0 cfio

and all is now working :)
thanks for all your help
Jason


On Thu, 2007-07-05 at 01:48 -0700, Dave Hylands wrote:
> Hi Jason,
> 
> >         I was a default image off the web from sf.net and the u-boot is 1.1.4.
> > problem is that i cannot upgrade it to the latest without a serial port.
> > RMA/ re flash is out as I am in Australia and freight back would be
> > high.
> 
> Hmm. I took my rev 1131 robostix with a connex, and loaded the 1161
> factory u-boot and 1161 rootfs.
> 
> I used this adapter:
> <http://www.sparkfun.com/commerce/product_info.php?products_id=718>
> 
> and connected Tx, Rx, and Gnd, and everything worked fine.
> 
> The 10k resistor patch wasn't applied, and is in fact only needed is
> no serial adapter is used.
> 
> If you connect the Tx to the Rx on your usb-to-serial adapter can you
> see what you type? And then disconnect the Tx from Rx and no longer
> see what you type (just wanting to make sure that usb-to-serial
> adapter is working properly).
> 
> If you have a problem, it's most likely to be with the robostix and
> not the gumstix.
> 
> Aside: In reviewing all of this stuff, I did discover a potential
> problem. The LDD11 pin is being driven by the robostix and by the
> gumstix. The input to the LDD11 line comes from the robostix, but when
> the robostix isn't running then that pin is floating.
> 
> So, I think we need to change a couple of the u-boot defaults, and
> ideally, the ATM_IRQ line should have a pullup(or pulldown)  resistor
> on it, to keep it from floating.
> 
> I see your reply came in as I was typing this, but I'm still going to
> send this anyways.
>

On Jul 5, 2007, at 2:06 AM, Jason Cox wrote:

> and /etc/modprobe.conf change
> alias mwlan0 cfio
> to
> alias wlan0 cfio

Hmm -- that's not right.  The MA701 doesn't use cfio -- that's a  
Marvell driver.

C

C,
	I will try latter with the line commented out.
Jason

On Thu, 2007-07-05 at 08:09 -0700, Craig Hughes wrote:
> On Jul 5, 2007, at 2:06 AM, Jason Cox wrote:
> 
> > and /etc/modprobe.conf change
> > alias mwlan0 cfio
> > to
> > alias wlan0 cfio
> 
> Hmm -- that's not right.  The MA701 doesn't use cfio -- that's a  
> Marvell driver.
> 
> C
> 
> -------------------------------------------------------------------------
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> Download DB2 Express C - the FREE version of DB2 express and take
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>