Re: [CDC-ACM] Linux USB "Reduced" CDC-ACM driver

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Am Dienstag 28 April 2009 13:27:19 schrieb Vincent:
> 
> > Sorry, I thought debugging was enabled ..
> > 
> > usb 1-1.3.2: configuration #1 chosen from 1 choice
> > cdc_acm 1-1.3.2:1.0: This device cannot do calls on its own. It is no modem.
> > cdc_acm 1-1.3.2:1.0: No union descriptor, testing for castrated device
> > drivers/usb/class/cdc-acm.c: interfaces are valid
> > cdc_acm 1-1.3.2:1.0: ttyACM0: USB ACM device
> > drivers/usb/class/cdc-acm.c: acm_control_msg: rq: 0x22 val: 0x0 len:
> > 0x0 result: 0
> > drivers/usb/class/cdc-acm.c: acm_control_msg: rq: 0x20 val: 0x0 len:
> > 0x7 result: 7
> > --
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> > 
> 
> And after opening the interface /dev/ttyACM0 :

That is an error. Please disregard my earlier mail. I hadn't read this mail.

> drivers/usb/class/cdc-acm.c: Entering acm_tty_open.
> drivers/usb/class/cdc-acm.c: acm_control_msg: rq: 0x22 val: 0x3 len: 0x0 result:
>  -32

It fails USB_CDC_REQ_SET_CONTROL_LINE_STATE
Does your device support this control request?

> drivers/usb/class/cdc-acm.c: acm_ctrl_irq - urb shutting down with status: -2

Expected consequence of an aborted opening.

	Regards
		Oliver
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