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Subject: RE: cvs: firmware/drivers button.c,1.14,1.15
From: Benoit Midy (bmidy_at_guddland.lu)
Date: 2002-07-01


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Hi, Linus

I've another idea (it still be an idea) about the way to communicate between 2 Rockboxs !
Is it possible to use a cable with 2 Jack-connector and plug it into the Line-in connector of the "Receiver" RockBox (acts as Salve) and
in the Ear connector of the "Transmitter" RockBox (acts as Master).
And then write a little UI to tranmit some files.
I'know that its usage will still resticted to people who'd we restricted, indeed most user have only one AJ, but me for example I've one and I'd like to transmit some
file from mine to the AJs of my friends (4 of them have will buy one).
So it could be usefull when we are on holliday for wexample on we have no PC with us !

To achieve this there are somes questions :
        - are the line-in , ear connectors (and also the others) only useable by the Audio chip ?
        - if yes, could we use it to pass throgh the data received "as they are" we could use a kind of encapsulation ? define a protocol to transport data through this
         audio chip and then pass it to(or from for the AJ in "master" mode) the uProcessor/ Ata drivers to write(or read for the "master") it .

I'd know it could become complicated, but I'm conviced it could be usefull !!
So I wait for any comments about the possibility to implement it ? and about the potential users, appliations ?

On Mon, 1 Jul 2002 10:21:55 +0200, Nielsen Linus (ext) wrote:

>> What is the aim of the usb support by Rockbox :
>> - simply detect the plugging ossthe USB cable and then
>> use it to transmit file between the RockBox HD and the PC
>
>Yes. That is the only thing that can be done with the ISDx00 chips.
>
>> - or is it planned to used this cable to make possible
>> to transmit file between 2 Players (also Recorder) !!
>
>That is not possible. The ISDx00 chips don't support peering. They can only
>function as a USB slave ATA device, nothing else. Our only intention with
>the USB support is to detect the USB connection and give the ATA bus to the
>ISDx00 chip.
>
>/Linus
>
>

Benoit Midy
Guddland Digital S.A.
Luxembourg
Tel: (352) 50 35 21 / 360
mailto:bmidy_at_guddland.lu
http://www.guddland.lu

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