qi_avt2 v1.0 board status
Adam Wang
adam at qi-hardware.com
Sat Oct 3 12:06:31 EDT 2009
Hi Carlos,
But I do like your explanation and teach me about the impedance of usb
host EMI filter and terminations. I'll find this USBDF01W5 or compatible
part here.
I was wrong in this.
Adam
Carlos Camargo wrote:
> 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
> <mailto: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
>> <mailto: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 <mailto: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 <mailto: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
>>> <mailto:andres.calderon at emqbit.com>
>>> > Web: www.emqbit.com <http://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 <mailto: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 <mailto: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
>>> > >>>
>>> > >>>
>>> > >>> _______________________________________________
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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
>>> <mailto: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 <mailto:cicamargoba at unal.edu.co>
>>> > >
>>> > > ________________________________
>>> > > _______________________________________________
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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 <mailto:cicamargoba at unal.edu.co>
>>> ------------------------------------------------------------------------
>>> _______________________________________________ Qi Developer
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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 <mailto:cicamargoba at unal.edu.co>
>> ------------------------------------------------------------------------
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>
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> Subscribe or Unsubscribe:
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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 <mailto:cicamargoba at unal.edu.co>
> ------------------------------------------------------------------------
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