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Somebody in the thread at some point said:
| Hi,
|
| I have a microcontroller based USB device and want to connect it to the
| Freerunner (in host mode). Now I need some clarifications on the resistor
| trick:
|
| The two 15k Ohm resistors are
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Somebody in the thread at some point said:
| Paul Fertser wrote:
| Following information is based on AN107 [1] (CSR, 2002, describes SCO
| configuration for BC-01b and BC-02-External) and experience.
|
| Please let me reveal myself as the total BT
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Somebody in the thread at some point said:
| On Wed, Feb 18, 2009 at 4:37 AM, Andy Green a...@openmoko.com wrote:
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|
| Somebody in the thread at some point said:
|
| | Hmm, I didn't expect that GTA03
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Somebody in the thread at some point said:
| | aware. Further, in this approach we at least double the framebuffer
| | memory consumption (likely more than double depending on what happens
| | with timing). So 800x600x3bytesx2 = 4MB just for
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Somebody in the thread at some point said:
| On Fri, Feb 20, 2009 at 12:45 AM, Andy Green a...@openmoko.com wrote:
| Blue4= write
| Blue5= chipselect ==
|
| I believe we already ate that for the main course, RGB664=16-bits
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Somebody in the thread at some point said:
| Hmm, I didn't expect that GTA03 would still require fb-encoded gpio
| (for lack of a better term). I had thought that S3C6410 would allow
| remapping of VD pins to GPIO. I don't have the actual S3C6410
|
with zero
power.
| On Mon, Feb 16, 2009 at 1:12 AM, Andy Green a...@openmoko.com wrote:
| Glamo only issues 18 bits of pixel data, it's all there is from it. But
| often it's possible to leave one or more of the control signals at a
| static level during the transfer.
|
| Ok, I see now. I see
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Somebody in the thread at some point said:
| To try and see if the interference is still happening with kernel version
| 2.6.28, I got the old Kingston card back out of the drawer and tried to
| reproduce the problem before updating. Starting
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Somebody in the thread at some point said:
| You need those 22 gpio *in addition* to the LCM data lines from glamo
to lcm?
|
| Ah, I think I see what you mean. I could convert the LCD data lines,
| VD0..23 into gpio and then I would have enough pins.
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Somebody in the thread at some point said:
| so what I am looking for is 22 pins that I can treat in that way, ie:
| use as regular GPIO, and are in some way exposed on a connector or a
| surface trace that can then be wired to an interface board
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Somebody in the thread at some point said:
| Hi Werner,
|
| I just wanted to congratulate you on your work. As we both know, those
| detailed current measurements should have been done years ago. Good to
| see they finally get done.
I do not think
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Somebody in the thread at some point said:
| Again, thank you very much. Didn't know that, probably didn't
understand it
| while reading. Good to know what's the matter of this, and even better
that
| GTA03 solves it. :)
It's true, but actually
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Somebody in the thread at some point said:
| I plan on making a generator for my bicycle. It will power some LEDS,
| but if I can make enough current, I could charge the phone as well.
|
| According to documentation, the freerunner wants 100mA, 500mA
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Somebody in the thread at some point said:
| The PMU may be able to keep up with this, but I'm not sure the
| battery will like it. If you google for short charge cycles, you
| find claims that this kills Li-Ion batteries.
Actually that's another
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Somebody in the thread at some point said:
| On Sun, Jan 25, 2009 at 11:47:06AM +, Andy Green wrote:
| What I would do though is swap the order you're doing things around.
| Start with a webcam mated to a mini USB plug and see how you go
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Somebody in the thread at some point said:
| On Sat, Jan 24, 2009 at 05:39:09AM +, Andy Green wrote:
| You'd need to meddle with the mylar flex PCB that holds the BT device
| where it terminates to the PCB, that won't be simple
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Somebody in the thread at some point said:
| Setup: The GSM modem is registered to a network but otherwise idle. The
| GTA02 is connected to a PC via USB, the battery is removed and instead
| power is supplied by an external power supply. There is a
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Somebody in the thread at some point said:
| I think I understand. I built one 10 F capacitor into the adapter (at the
| mass), so the problem with the headphones should be fixed. I also
measured a
| 1,59V current at the capacitor when plugged in and
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Somebody in the thread at some point said:
| Some people have suggested that the translator is so simple that one
| should even put it into the kernel ...
There's a choice about using the userland i2c stuff to access the
storage for the program or
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andrzej zaborowski wrote:
BTW It's great that Openmoko puts this much effort in having a
mainline acceptable SDK but it's very hard to catch up with the years
of support by community and vendors on OMAP meaning that every little
quirk of the
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thomasg wrote:
On Mon, Oct 6, 2008 at 10:51 PM, Andy Green [EMAIL PROTECTED]
mailto:[EMAIL PROTECTED] wrote:
Steady on, that OMAP device is marginally slower vs s3c6410 CPU, 600 vs
633MHz. And it's hard to say that Samsung doesn't care
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No -- I mean that GTA02 has risc coprocessors too like the OMAP
discussed here, they are not automatically any benefit unless they are
actually deployed to do something was the point. I don't think it's any
secret we likely won't be using the
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Somebody in the thread at some point said:
| Completely agree, but MICBIAS gets something different from HF during
| the buzz behaviour, it gets small depressions (like 100mV IIRC) in it at
| ~200Hz period. Basically it is exactly like the PSRR
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Somebody in the thread at some point said:
| Is there any way to switch the audio path to some file output?
| i.e. can I (potentially) record buzz without an active GSM connection
| ( while irradiating the phone from an external HF source )
| would be
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Somebody in the thread at some point said:
| Actually Andy explained the pin3/pin5 issue.
| From what I understand, with removed receptacle and 3-5 short, your buzz
| actually vanished, no? That's good news.
|
| For the suggested rework, that's
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Somebody in the thread at some point said:
| Our incomplete understanding does not lead to a solution for headset mic
| buzz nor any security about future designs.
| You're sure about that?
Yeah, waving hands about RF in cans is not understanding:
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Somebody in the thread at some point said:
| Andy Green wrote:
| What I like though is the Be conservative in what you do part of it.
| Because we have not seen failures in the field from GTA02 arrangements,
| I am having a hard time accepting we need
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Somebody in the thread at some point said:
| Now I know that I must've hit bug #1158, but my problems don't stop
| here. With the battery empty, the Neo won't boot, so much is clear.
| However, it doesn't even charge, it seems. Before I went to bed
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Somebody in the thread at some point said:
| Hello everybody,
|
| i have made a couple graphs of battery charging and discharging.
|
| So in case you are interested a have published my results on my blog:
|
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Somebody in the thread at some point said:
| On 8/26/08, Joerg Reisenweber [EMAIL PROTECTED] wrote:
| Am Di 26. August 2008 schrieb Uwe Klein:
|
| Hi,
| in this context:
|
| is there any (hardware) watchdog stuff that limits transmit time and
|
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Somebody in the thread at some point said:
| No I never saw it before, they mainly look like I would expect.
| CURRENT_NOW during charging is interesting it shows the transition from
| constant current mode at the start to constant voltage mode where
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Somebody in the thread at some point said:
| what worries me in plot 2+3 right now is the fact that suddenly during
night
| the decharging rate significantly increases (see 24h and and 55h
| in plot 2, 5400 min and ~5800 min in plot 3!).
...
| just
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Somebody in the thread at some point said:
| On Wed, Aug 20, 2008 at 09:39:14AM +0100, Andy Green wrote:
|
| IMO it doesn't make any harm to see MOSFET switches on the power rails
| to whole GSM side so there is no question.
|
| no, it actually causes
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Somebody in the thread at some point said:
| HI:
| I've noticed that camera driver has been merge into Andy's
| kernel branch.
| so will GTA03 support camera interface? or further question,
| is it possible to make the camera a module interface.
|
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Somebody in the thread at some point said:
| Andy Green wrote:
| No I disagree -- removing the power ensures actual power off.
| Everything else is something different than ensure actual power off
|
| We could call it a built-in power-off switch
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Somebody in the thread at some point said:
| Am Mo 25. August 2008 schrieb Werner Almesberger:
| Andy Green wrote:
| It can be prototyped and the final PA spectral performance compared to
| piece of wire, so this is something we can know rather than
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Somebody in the thread at some point said:
| Am Mo 25. August 2008 schrieb Andy Green:
| Point taken about the GTA03+ module though -- it should take care of
| power switching inside the module boundary in a reliable way or the
| module is broken, so
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Somebody in the thread at some point said:
| It's a pity I didn't ask him to watch consumption when he was quiet and
| not handling the phone. He said that it chewed through some large chunk
| of his battery when idle in this state, so the current
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Somebody in the thread at some point said:
| Ive seen this a few times on two FR phones (both up to date 2007.2).
| Yesterday, after using gps on the way to work tangogps locked up - some
| 10 minutes later when I pulled into the car park I picked the
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Somebody in the thread at some point said:
| On 8/19/08, Joerg Reisenweber [EMAIL PROTECTED] wrote:
|
| This power removal is done by U1705, and it should relyably cut power
when we
| disable IO_3V3 what is quite normal for shutoff.
| No special
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Somebody in the thread at some point said:
| On 8/20/08, Andy Green [EMAIL PROTECTED] wrote:
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|
| Somebody in the thread at some point said:
| | On 8/19/08, Joerg Reisenweber [EMAIL PROTECTED] wrote
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Somebody in the thread at some point said:
| So unless we're absolutely sure no GPIO can ever have a non-zero
| potential (or only through a very large impedance) while we're in
Have a look at the circuit and give some examples of signals that can
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Somebody in the thread at some point said:
| On 8/20/08, Werner Almesberger [EMAIL PROTECTED] wrote:
|
| That's why try to control as many signals to subsystems that are
| active in PMU.STANDBY as possible from PMU GPIOs. And yes, it would
| be
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Somebody in the thread at some point said:
| On 8/20/08, Andy Green [EMAIL PROTECTED] wrote:
| We have no control over PMU startup. It brings up various rails how it
| likes all at the same time at levels it likes.
| The PCF50633 ?
| I have printed
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Somebody in the thread at some point said:
| On 8/20/08, Andy Green [EMAIL PROTECTED] wrote:
|
| Yes, but the datasheet does not have all the info. There are various
| mask-programmed options on our variant I don't know are listed anywhere
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Somebody in the thread at some point said:
| Am Mi 20. August 2008 schrieb Werner Almesberger:
| Joerg Reisenweber wrote:
| HUH? Please give a pointer or quote! :-(
| Phew. Instead of spending the rest of the day searching through our
| archives for
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Somebody in the thread at some point said:
| There is good support for the PIC16 series.
|
| Completely different toolchain, though.
| yes, on the other hand sdcc has worked well for me.
I also used sdcc on some nice cheap turbo 8051-based Silicon
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Somebody in the thread at some point said:
| Andy Green wrote:
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|
| Somebody in the thread at some point said:
|
| | Really USB host is very usable and flexible for these tasks.
|
| | It mandates
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Somebody in the thread at some point said:
| Ian Stirling wrote:
| Make a 'debug board' available, but much, much cheaper.
| This would be something like (in basic form)
|
| This has too many moving parts written all over it :-( Granted,
| MPU
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Somebody in the thread at some point said:
| On 8/14/08, Ian Stirling [EMAIL PROTECTED] wrote:
|
| This is part of my cunning plan to get a usable connector for expansion
| on the phone :)
|
| Fullsize SD- Card slot for SDIO ?
|
| what would you like
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Somebody in the thread at some point said:
| Andy Green wrote:
| Second ARM core... I seem to recall calling this insane and it not
| actually helping with the things we need a tiny power-friendly always-on
| MPU for,
|
| Would you consider ST's small
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Somebody in the thread at some point said:
| Joerg,
| Sorry about the wrong message.According to Len's report today, grounding
| of pin6 at JK4401 is not work.
What about grounding pin 4 directly, did it make any change?
Maybe try this during a
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Somebody in the thread at some point said:
| The chance to get caught is even higher.
| Operating on the GSM bands automatically means the basestations receive
| what you send.
| This also means they can (and do) easily recognize if there's something
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Somebody in the thread at some point said:
| We add couple documents on the section of MokoForesight wiki page.
| Of course, the more hardware-analysis documents will come. Enjoy these. :)
Hey they were a very cool read, especially iPhone
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Somebody in the thread at some point said:
| On Wed, 30 Apr 2008 20:18:45 -0300
| Werner Almesberger [EMAIL PROTECTED] wrote:
|
| Andy Green wrote:
| To my regret forcing Vcont to 3.0V or 0V when on external or
| internal antenna did not make any
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Somebody in the thread at some point said:
| Andy Green wrote:
| This is for the 500mA question? Dunno yet, there can be pins on FTDI
| that change state under this circumstance.
|
| There is :) Pin 41, PWREN# (nPWREN in Openmoko terminology
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Somebody in the thread at some point said:
| But at our normal situation with internal antenna and no load on
| external antenna, we drive VCONT to 810mV (26% Vdd).
|
| That might explain some of the things I've been seeing here, bad
| reception
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Somebody in the thread at some point said:
| By the way 2: drawing power from debug-USB also needs charger detection
| and a current limiter for 100mA vs. real power.
|
| Right. Never will happen, FTDI chip can't do this I think. :-
| So we're
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Somebody in the thread at some point said:
Hi Daniel -
| That might explain some of the things I've been seeing here, bad
| reception with the internal GPS antenna and maybe the failure of the
| antenna switch on my v4 was a result of this floating
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Somebody in the thread at some point said:
| Hello.
|
| On Tue, 2008-04-29 at 14:22, Andy Green wrote:
| Hey I like USB power in, so much so we spnt the morning trying to figure
| out how to have two of them. Preaching to the converted :-)
|
| Good
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Somebody in the thread at some point said:
| Hi there,
| we played with a number of ideas on the HW side, one of them was around
| how we can extend the lifetime of gta02, by making some fixes.
| Such as removing the glamo chip. Which would leave no
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Somebody in the thread at some point said:
| Andy Green wrote:
| We go on with MSP430FG4618.
|
| Perfect. Pheew, what a battle :-)
What battle... violent agreement broke out from the start.
| Now, on to the two remaining MPU issues:
Loads of other
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Somebody in the thread at some point said:
| On 28/04/2008, Werner Almesberger [EMAIL PROTECTED] wrote:
| Basically a form of SDIO multiplexing.
| Other options would be SPI.
|
|
| We once asked Samuel about SPI, and he said that it would be
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