qi_avt2 v1.0 board status

Carlos Camargo cicamargoba at gmail.com
Sat Oct 3 11:52:53 EDT 2009


Hi Adam.



You're totally right, If you remove Q6 as I done :(  The power amplifier is
enabled all the time, without signal, but enabled, so Q6 is necessary.



Carlos


On Sat, Oct 3, 2009 at 9:02 AM, Adam Wang <adam at qi-hardware.com> wrote:

>  Hi,
>
> Carlos Camargo wrote:
>
> Hi
>
> I'm testing the speaker, I add the following lines to
> arch/mips/jz4740/board-xxx.c
>
> *****************************************************
>     __gpio_disable_pull(GPIO_USB_ID);
>     __gpio_as_input(GPIO_USB_ID);
>
>     __gpio_as_output(GPIO_AMP_EN);
>     __gpio_set_pin(GPIO_AMP_EN);
>
>
>     __gpio_as_output(GPIO_SHDN_HOST);
>     __gpio_set_pin(GPIO_SHDN_HOST);
>
> *****************************************************
> and this lines to  include/asm-mips/mach-jz4740/boad-xx.c
>
>
> *****************************************************
> #define GPIO_SHDN_HOST        49   /* GPB17 Active Low*/
> #define GPIO_USB_ID        59   /* GPB27 */
> #define GPIO_AMP_EN        100  /* GPD4 Active High*/
> *****************************************************
>
>
> With this changes the speaker works, as you can see in [1]. But I think
> that the Transistor Q6 is not necessary, Q6 is always ON, so on the pin 7 of
> U10 (CE) we have the value of AMPEN. In this configuration Q6 use the GPIO
> current, so we don't need tghis transistor we can remove it and connect
> AMPEN directly to U10's pin 7 (CE)
>
>  No, the Q6 is designed as a role of either Earphone plugging or speaker
> activating at the same time. If there's no earphone inserted, the AMPIN pin
> is Low; otherwise, it is a High. So during no earphone inserted, meanwhile,
> this Low of AMPIN can activate Q6 turn on, CPU can know current condition is
> for speaker. The AMPEN can either giving a Low to MUTE speaker or giving
> HIGH to turn on speaker. But as long as earphone inserting, the AMPIN
> becomes High, this will let Q6 to be turn off (means automatically turn off
> speaker if user wants to listen via earphone). Then pin7(CE) of U10 is Low.
> So this Q6 is necessary. :-)
> Adam
>
> I'm trying to use a USB host, but the kernel don't recognize any usb device
> attached to this port, I'm continuing test this port...
>
>
> Carlos
>
>
>
> [1]http://downloads.qi-hardware.com/hardware/hacking/naruto_audio.mp4
>
>
>
>
>
>
>
> On Wed, Sep 30, 2009 at 8:03 PM, Adam Wang <adam at qi-hardware.com> wrote:
>
>> Hi Carlos,
>>
>> Congradulations!!!
>>
>> Carlos Camargo wrote:
>>
>> Hello
>>
>> Very beautiful pictures Adam!!!
>>
>> I have two boards with 64MB and works fine, I have a little problem with
>> the LCD connector, I Think that this connector change its shape in the
>> soldering process,
>>
>>  Yes, you are right. The LCD connector should be normally in mounting by
>> SMT process, but for cob process they need a smooth and flat bottom side
>> which so i cannot
>> use automatically mount machine to do it first because it will need an
>> extra expense for jig to meet the bottom side's all components' shape on cob
>> site. If having more quantities, the jig can be applied, so this condition
>> should won't be occurred. :-)
>>
>> so I replace this connector in both boards by another one (thanks Adam)
>> and I can use both LCDs. I'm starting to test the sound and USB host port.
>> I'm attaching
>>
>>  The whole new picture of Nanonote for avt2 is now same as me here. :-)
>> The sound and USB host port yeah need your help later. And the current
>> status of avt2 v2.0 is at here, you all can quickly see that.
>>
>> http://downloads.qi-hardware.com/hardware/qi_avt2/v1.0/report/qi_avt2_v1.0_report.ods
>>
>> some Nano pictures [1] New Nano show openwrt Logo  [2] Using a custom FTDI
>> USB-serial (I think that we can provide this board with a Nano developer
>> version)
>>
>>  Do you think that the serial console cable provided to you is good for
>> h/w hacker in purpose? It was made by here vendor in free. The question is
>> that I've not been used to meet the FTDI USB-serial board's female pin
>> holders, from the pictures it seems a 2.54mm or 2.00mm pitch, right? I have
>> 20 pcs about such kind of serial console cable. We can do this work by
>> ourselves to meet any board we're using. But I am not sure if this is easy
>> and reachable for s/w hacker.
>> Adam
>>
>>  [3] With usb host connector attached
>>
>>
>> [1] http://downloads.qi-hardware.com/hardware/hacking/Nano_works.jpg
>> [2] http://downloads.qi-hardware.com/hardware/hacking/usb_serial.jpg
>> [3] http://downloads.qi-hardware.com/hardware/hacking/usb_host.jpg
>>
>> Best Regards
>>
>>
>> Carlos
>>
>>
>> On Wed, Sep 30, 2009 at 5:05 AM, Wolfgang Spraul <
>> wolfgang at qi-hardware.com> wrote:
>>
>>> Andres,
>>>
>>> > The price of the jz4720  plus the bonding wire price  is competitive
>>> > against the  jz4740 price plus the BGA soldering process?
>>>
>>>  Well that's a very long story, as always with prices :-)
>>> COB is getting more popular in China (and that means in most consumer
>>> electronics), because it is cheaper. At least that's what the
>>> manufacturers
>>> are saying but I'm sure companies that are producing millions of devices
>>> each
>>> month know their numbers.
>>>
>>> For the 20 boards we produced, we paid about 30 USD / chip for the COB
>>> :-)
>>> Not exactly cheaper...
>>> See a more detailed cost breakdown for the 20 boards at
>>>
>>> http://downloads.qi-hardware.com/hardware/qi_avt2/v1.0/report/expense/avt2_v1.0_expense.ods
>>> For 500 boards the price would go down to ca. 15 USD / chip for the COB
>>> alone.
>>>
>>> Now, one problem we had was that Adam could not find COB places in
>>> northern
>>> Taiwan that could do .8mil aluminum wires (see Adam's mail that you just
>>> responded to). So in order to just 'get the boards done', he chose .7mil
>>> gold wires.
>>>
>>> Going forward we need to improve all this.
>>> Maybe for another few small runs we continue to do COB, especially since
>>> Adam has it all figured out now. But then we will probably look into
>>> QFP/QFN
>>> versions, or BGA. The problem with switching to BGA on the current
>>> NanoNote
>>> board was that Adam said because the other side of the PCB was all
>>> covered
>>> by keys, we would need to go from a 4-layer to a 6-layer PCB when using
>>> BGA.
>>>
>>> Wolfgang
>>>
>>> On Tue, Sep 29, 2009 at 10:38:44PM -0500, Andrés Calderón wrote:
>>> > On Tue, Sep 29, 2009 at 10:52 AM, Adam Wang <adam at qi-hardware.com>
>>> wrote:
>>> > > Hi Carlos,
>>> > >
>>> > > Sorry for the late, you can check those pictures of actual bonding
>>> wire
>>> > > here[1]. It's an 0.7mil golden wire. I can illustrate a little bit in
>>> report
>>> > > to show how make
>>> > > it layout right. Local vendors here are having aluminum capability
>>> but can
>>> > > not meet our die's pitch between pads, because they have only 1.0
>>> mil. Will
>>> > > not have
>>> > > good quality in aluminum process on our case. Fortunately here have
>>> 0.7 mil
>>> > > gold wire process but expensive. :-)  And most early vendors here had
>>> moved
>>> > > into China.
>>> > >
>>> > > [1]
>>> > >
>>> http://downloads.qi-hardware.com/hardware/qi_avt2/v1.0/pcb/cob/bonding_wire/
>>> > >
>>> >
>>> > Amazing pictures (the bonding_wire7.jpg  is my new desktop background
>>> :) )
>>> >
>>> > The price of the jz4720  plus the bonding wire price  is competitive
>>> > against the  jz4740 price plus the BGA soldering process?
>>> >
>>> > BR,
>>> >
>>> >     Andrés Calderón
>>> >     Cel:     +57 (300) 275 3666
>>> >     Email: andres.calderon at emqbit.com
>>> >     Web:    www.emqbit.com
>>> >
>>> >
>>> > > Adam
>>> > >
>>> > > Carlos Camargo wrote:
>>> > >
>>> > > Hi Adam
>>> > >
>>> > > Can you please upload a processor close-up photo?
>>> > >
>>> > > Best Regards
>>> > >
>>> > >
>>> > > Carlos
>>> > >
>>> > >
>>> > > On Sun, Sep 13, 2009 at 8:30 AM, Carlos Camargo <
>>> cicamargoba at gmail.com>
>>> > > wrote:
>>> > >>
>>> > >> hi adam, good job. i want one new board :).
>>> > >> when finish all tests, please check the kicad brd file. we want that
>>> > >> the next board will be designed in kicad.
>>> > >> We've already uploaded pcb and footprints files, all components
>>> placed,
>>> > >> and remove a lot of test-points
>>> > >>
>>> > >> Can you please check if the placement and size are right ?
>>> > >>
>>> > >> Best Regards
>>> > >>
>>> > >>
>>> > >> Carlos
>>> > >>
>>> > >> On Sun, Sep 13, 2009 at 3:52 AM, Adam Wang <adam at qi-hardware.com>
>>> wrote:
>>> > >>>
>>> > >>> Hi All,
>>> > >>>
>>> > >>> The picture of avt2_v1.0 board with die is here[1].
>>> > >>> And it just works and shown up[2].
>>> > >>> I'll keep do more basic IO tests.
>>> > >>> Adam
>>> > >>>
>>> > >>> [1]
>>> > >>>
>>> http://downloads.qi-hardware.com/hardware/qi_avt2/v1.0/smt/pictures/top_jz4720.jpg
>>> > >>> [2]
>>> > >>>
>>> http://downloads.qi-hardware.com/hardware/qi_avt2/v1.0/report/photos/avt2_v1.0_works.JPG
>>> > >>>
>>> > >>> Adam Wang wrote:
>>> > >>>>
>>> > >>>> Hi All,
>>> > >>>>
>>> > >>>> We're now on the process to produce small run of avt2 board, here
>>> is the
>>> > >>>> top side of avt2 without jz4720 temporarily;
>>> > >>>>
>>> > >>>>
>>> http://downloads.qi-hardware.com/hardware/qi_avt2/v1.0/smt/pictures/top.jpg
>>> > >>>> Will keep you posted later.
>>> > >>>> Adam
>>> > >>>
>>> > >>>
>>> > >>> _______________________________________________
>>> > >>> Qi Developer Mailing List
>>> > >>> Mail to list (members only): developer at lists.qi-hardware.com
>>> > >>> Subscribe or Unsubscribe:
>>> > >>> http://lists.qi-hardware.com/cgi-bin/mailman/listinfo/developer
>>> > >>
>>> > >>
>>> > >>
>>> > >> --
>>> > >> Carlos Iván Camargo Bareño
>>> > >> Profesor Asistente
>>> > >> Departamento de Ingeniería Eléctrica y Electrónica
>>> > >> Universidad Nacional de Colombia
>>> > >> cicamargoba at unal.edu.co
>>> > >
>>> > >
>>> > >
>>> > > --
>>> > > Carlos Iván Camargo Bareño
>>> > > Profesor Asistente
>>> > > Departamento de Ingeniería Eléctrica y Electrónica
>>> > > Universidad Nacional de Colombia
>>> > > cicamargoba at unal.edu.co
>>> > >
>>> > > ________________________________
>>> > > _______________________________________________
>>> > > Qi Developer Mailing List
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>>> > > Subscribe or Unsubscribe:
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>>> > >
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>>
>>
>>
>> --
>> Carlos Iván Camargo Bareño
>> Profesor Asistente
>> Departamento de Ingeniería Eléctrica y Electrónica
>> Universidad Nacional de Colombia
>> cicamargoba at unal.edu.co
>>
>> ------------------------------
>>
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>>
>>
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>>
>
>
>
> --
> Carlos Iván Camargo Bareño
> Profesor Asistente
> Departamento de Ingeniería Eléctrica y Electrónica
> Universidad Nacional de Colombia
> cicamargoba at unal.edu.co
>
> ------------------------------
>
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>
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>



-- 
Carlos Iván Camargo Bareño
Profesor Asistente
Departamento de Ingeniería Eléctrica y Electrónica
Universidad Nacional de Colombia
cicamargoba at unal.edu.co
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