Stuffing Serial Bluetooth Module Inside C1k Casing, share your success stories ... Options

[Lurker]

Albertr,
Sorry, just one more thing...

On your project page, under the USB OTG Power Domain section, it states:

....
This limit could be lifted to:
# ~400-450mA with a 2K resistor
# ~500mA with a 1.6K resistor
# ~600-650mA with a 1K resistor
....
According to the following post by Boris, it should be safe to draw ~500mA from this regulator. I'm using it with a 1K resistor on the PCL pin, and it's able to provide sufficient current to power both internal Wi-Fi and bluetooth modules at the same time.

You have stated several times that you are using a 1k resistor. Has this proven to be safe? Or are you simply making sure your device's total power draw does not exceed 500mA?
My local RadioShack only stocked 1k and 1.5k resistors (in the range that I need). Which would you recommend?

[albertr]

I'm not sure I understand your question... Yes, I'm using a 1K resistor. It works fine for me. What kind of proof you are looking for? With a 1K resistor on PCL pin, TK3850 is delivering enough juice to power both wi-fi and bt modules inside my C1K. But if I connect the external usb ethernet dongle at the same time, it shuts itself off (overcurrent protection kicks in). I didn't really want to have a possibility of three usb devices powered up at the same time, so it's fine with me. Most of the time, I use either bt or wi-fi or external ethernet only.
-albertr

[Lurker]

<deleted>

Sorry, I wrote that after a long day. When I went back and re-read it just now, I finally saw how little sense it made.

[Da_Blitz]

Sounds like it should work to me as a lower val means more current and 500mA < 600mA, even if 1.6K is 500mA you can only get 1K or 1.5K so your limit should be above 500mA

[speculatrix]

wpasupplicant doesn't require Prism chipset drivers. In fact, it can work with a broad range of hardware if appropriate WE support is implemented in the drivers. I.e. on my C1K, I have a ZD1211-based usb module doing WPA just fine...
-albertr

hmm, so how can we get WPA working on the 6000 which is a usb prism chipset for which there only appear to be wlan-ng? maybe take this to the 6000 section?

[Zuse]

Hi Modders,

just found this one here

Suncore Wireless LAN / Bluetooth USB Kombi-Stick
http://www.suncore.com.tw/

I do not know it was discussed already here or not (the thread got to long to remember all).
Just need to find out whether it works under Linux or not, and if so together with WPA.
Maybe someone can open one to check the chipssets.
I can contact the suncore people if it might be from more interest.

Best regards

Zuse

[Da_Blitz]

anyone got a copy of albertr site, cant seem to get a response from the server (it accepts the connection but dosent send any data back)

[Jon_J]

I copied this page, (by albertr), awhile ago, and zipped it up. It includes 27 pics and a schematic.
"Exploring built-in wireless networking on PXA270-based Sharp Zaurus" (1.4mb)

Attached File(s)

 Exploring_built_in_wireless_on_PXA270_based_Sharp_Zaurus.zip ( 1.49MB ) Number of downloads: 178

 

[Da_Blitz]

thanks for that, i deleated my local copy by accident.

if anyone needs it i will put it on my site until asked to take it down

bluetooth'd

[edit] fixed the link, had an extra E in it

[scholbert]

Hi there,

i'd like to connect a very small bluetooth module to my C3100 to the I/O port on the back (very nice work albertr) .
After having some tests i will try to find a little space to put it inside.

I just edited this message because the serial I/O at the back is supported in cacko 1.23, so everything is fine now.

I made a mistake maesuring the serial lines on the I/O.

The rest is hardware stuff.

scholbert

[louigi600]

thanks for that, i deleated my local copy by accident.

if anyone needs it i will put it on my site until asked to take it down

bluetooth'd

[edit] fixed the link, had an extra E in it

Da_Blitz ... your link got broken too ;-)

Anyway I've a USB HUB very much similar to the onbe you described
lsusb reports:
Bus 001 Device 005: ID 03eb:0902 Atmel Corp.
Is this the same as the one you were talking about ?

Mine seems to have trouble with USB-STORAGE devices (everything elese seems to work).
Is this some trouble just with mine or is your's afflicted by the same trouble ?

[Da_Blitz]

looking at lsusb (i have trouble making sense of it at the best of times even with -t) i can see that i have a diffrent manufacter. it could be the same with diffrent firmware

with USB storage was it selfpowered, perhaps it could not deal with power spikes well or didnt provide enough power

[louigi600]

looking at lsusb (i have trouble making sense of it at the best of times even with -t) i can see that i have a diffrent manufacter. it could be the same with diffrent firmware

with USB storage was it selfpowered, perhaps it could not deal with power spikes well or didnt provide enough power

I tryed bothe powering separetely the device and using low power devices (like usb mem sticks) that can power off the OTG anyway ... nither was was a success.

Did you complete the internal HUB in your Z ?

[Da_Blitz]

neer had a chance, connected 5v backwards and blew the power supploy.

i did manage to buy a c3100 but i havent done anything on it at all. its low on my list of priorities however i did dremel the case

as i stated earlier in this topic the hub i have is no bigger than a CF card so with some filingi managed to make it fit in the MD slot. however i would not do that again as it destroys the mechanical intregrity of the case along taht edge.
what i would do instead is take the CF blakning plate and use that as the frame for the SUB hub (no gaps and hold everything in place

i did manage to find room for a wifi card however i had to remove the SD slot PCB and dremel the MD retention plastic. with a bit of creativity and tape you could remove the plastic in its entirety however it seemed like a good idea to keep it

the last thin i did was dremel the pen well so that a wif antenna socket could be put there instead (dont use the touch screen much). basically you feed the cable down the tube then glue the socket at the end. when fitted it looked quite nice.

i might practice on the dead one and try and fix the power supply (i have plans for it as "the complete tagger") before ruining the finish on the c3100

[louigi600]

I want to do 2 things ... one relatively soon and the other later on.

The first thing I'd do is to pickyback on the 5.7K Ohm OTG regulator a 2.2K Ohm or even a 1.2K Ohm. This would rase the OTG output current to equal or exeed standard usb current specifications thus allowing me to acheive the following:
keep the usb client capabilities,
drive my zd1211 directly from Z (without externally powered hub)
drive a small hub with bothe buetooth and zd1211 dongles plugged in without need external power,
drive a 2.5" usb HDU without the need of external power.

At a later stage I'd use the port1 datalines (along with a 5V power domain yet to be defined but separate from the OTG) to hook up the tiny hub I have with the zd1211 and bluetooth modules connected to it.
I'd do this later because of the following difficulties:
finding another safe 5V power domain,
the port1 are not functional with the default 2.6 kernel untill the port2 detectd that it's used as a host (you can see lsusb detects nothing if nothing is connected to the OTG ... while it detects whatever is connected to OTG + an empty port when the OTG is used as HOST {true at least on pdaxrom r198}),
having to modify kernel to reuse some free gpio pins to power controll power on the internally placed dongles.

I know that Albertr already has done part of the job .... but he completely removed the USB client capabilities.

I also looked closely at where the hub's standard USB plugs would come out of the case and I agree with you that the cases structural integrity would be compromised if one would cut holes for standard usb plugs. Actually I think that even 2 mini plugs wouls still have bad effects on structural integrity ... so I'd just be happy with the internal wireless.