On Thu, 18 May 2006, vkataev wrote:

> no matter, I'm just looking  a way to create a simple LED color-show

Will the show be effective if the LEDs flicker at a rate of 12 MHz (USB 
full speed) or even 1.5 MHz (USB low speed)?

> >If you do this, you will find the computer does send data to your circuit.  
> >However the USB drivers expect every attached device to provide responses
> >to requests, which your circuit will not do.  As a result the drivers will
> >disable the USB port and you won't be able to send any useful data.
> >  
> >
> 
> you mean I have to operate with drivers, but I dought;
> the one way I see, is directly to hack Torvald's hci code in 
> linux/drivers/usb/core

Yes, that's right.  The code in linux/drivers/usb/core _is_ a driver.  So 
when you hack it, you are operating on a driver.  :-)

(By the way, not much of the code in linux/drivers/usb/core is Torvalds's
any more.  I mean, it wasn't written by him.  And it isn't HCI code
either; the HCI drivers are now in linux/drivers/usb/host.)

Alan Stern



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