[Gta04-owner] GTA04A5 - was 8mW sleep for Beagle Board

Butrus Damaskus butrus.butrus at gmail.com
Thu Jan 10 00:36:49 CET 2013


On Mon, Jan 7, 2013 at 11:09 PM, NeilBrown <neilb at suse.de> wrote:
> On Mon, 7 Jan 2013 18:55:52 +0100 "Dr. H. Nikolaus Schaller"
> <hns at goldelico.com> wrote:
>
>>
>> Am 07.01.2013 um 04:56 schrieb NeilBrown:
>>
>> > On Fri, 4 Jan 2013 11:51:38 +0100 "Dr. H. Nikolaus Schaller"
>> > <hns at goldelico.com> wrote:
>> >
>> >>
>> >> Am 04.01.2013 um 10:21 schrieb Radek Polak:
>> >>
>> >>> On Thursday, January 03, 2013 01:09:53 AM NeilBrown wrote:
>> >>>
>> >>>> On Tue, 1 Jan 2013 16:29:45 +0100 Radek Polak <psonek2 at seznam.cz> wrote:
>> >>>>> Hi,
>> >>>>> i found this mail:
>> >>>>>
>> >>>>> https://groups.google.com/forum/?fromgroups=#!topic/beagleboard/GXqO9rRsy
>> >>>>> Cg
>> >>>>>
>> >>>>> Do i count right? 8mW means 2mA on 4V battery. I wonder if we could apply
>> >>>>> this also on GTA04.
>> >>>>
>> >>>> The first patch is a useful guide for writing similar code for the GTA04.
>> >>>> The remainder aren't particularly relevant I think - the relevant
>> >>>> functionality is already in mainline.
>> >>>
>> >>> I wonder about the HW changes - if they can be also applied on GTA04.
>> >>
>> >> It is on the GTA04A5 todo list. At least the "disable 26MHz oscillator" patch.
>> >>
>> >
>> > What else is on the A5 todo list?  I'm particularly hoping that inserting the
>> > headset plug will cause an interrupt.
>> > Any chance of seeing the schematics before you commit to them :-?
>>
>> Yes, that is planned to be finalized this week.
>>
>> Important (i.e. kernel relevant) changes are so far:
>> * power down 26 MHz oscillator through switching off VPLL1 (tbc.)
>> * LIS302 option removed completely
>> * LSM303 option removed completely
>> * BMA180 / HMC5883 replaced by BMC050
>> * GPS-chip has 1 second pulse - connected to GPIO114 (was connected to LIS302)
>> * IrDA can be separately enabled/disabled (GPIO175 or TGPIO7 - tbc.)
>> * TCA8418 replaced by FFC connector (for external keyboard)
>> * there will be an optional connection that a 3G wakeup can simulate pressing the power key (tbc.)
>> * switch in headset jack will pull down a GPIO if no headset is inserted (tbc.)
>> * RESET-OUT from UMTS module connected to a GPIO so that it is possible to detect if it is really running (tbc.)
>>
>
> Sounds good. thanks.
>
> Though I wonder a bit about IrDA - does anyone actually care about that?  I
> would imagine that most situations that would once have used IrDA would not
> be using bluetooth.

I think IrDA maybe easier to use with MCU's (and doesn't interfere
with WiFi in 2.4GHz)...

> The OMAP3 is capable of generating CIR (Consumer IR) signals which most
> consumer electronics remote controls use.  That might be more useful, however
> it needs to be wired differently.

In order to generate CIR a simple GPIO with PWM connected to a cheap
IR LED might
be sufficient...

> The CIR signal goes out on the uart3_cts_rctx  pin, where as IrDA goes out on
> uart3_tx_irtx - So I don't think they can use the same IrLED (???).
>
>
>> Some options are a little critical and can't be tested before building the first devices.
>> So there will be hardware options to disable/remove them if they don't work well enough.
>>
>> Non-software related changes replace some obsolete components, improve the
>> GPS antenna switch, reduce noise generated by SD card interface, and make a
>> really complete case kit possible with components from continued production.
>>
>> But at the moment it does not look as if there is any demand for a GTA04A5 board.
>> So far there is exactly 1 preorder for a GTA04A5 board...
>
> That's a shame.  Maybe demand will pick up as Christmas gets further and
> further into the past...
>

Well, for many people 555€ is a lot of money... :-/


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