I have usb cash drawer. I can get status of the
device with usb_get_report function. It works fine.
In docs of the device I can read:
-------
... to open a cash drawer till, your application must send
a pulse of a minimum duration to the cash drawer ... the pulse time
is 80 milliseconds.
-------
The question is how to open the cash drawer till with
linux usb interface? I tried with code:
-----
purb=usb_alloc_urb(0);
buff[0]='1';
buff[1]='0';
buff[2]='1';
buff[3]='O';
FILL_INT_URB(purb, drawer_data.dev, usb_sndintpipe(drawer_data.dev, 0),
buff, 4, drawer_complete, &drawer_data, 32*HZ);
usb_submit_urb(purb);
usb_free_urb(purb);
-----
but I get -EINVAL (-22) from usb_submit_urb function. Why?
This is output from usbview utility:
---------------
Speed: 12Mb/s
USB Version: 1.10
Device Class: 00(>ifc )
Device Subclass: 00
Device Protocol: 00
Maximum Default Endpoint Size: 16
Number of Configurations: 1
Vendor Id: 04b3
Product Id: 4554
Revision Number: 1.06
Config Number: 1
Number of Interfaces: 2
Attributes: c0
MaxPower Needed: 2mA
Interface Number: 0
Name: sp750_cash_drawer
Alternate Number: 0
Class: 03(HID )
Sub Class: 0
Protocol: 0
Number of Endpoints: 1
Endpoint Address: 81
Direction: in
Attribute: 3
Type: Int.
Max Packet Size: 8
Interval: 32ms
Interface Number: 2
Name: sp750_cash_drawer
Alternate Number: 0
Class: 03(HID )
Sub Class: 0
Protocol: 0
Number of Endpoints: 1
Endpoint Address: 83
Direction: in
Attribute: 3
Type: Int.
Max Packet Size: 8
Interval: 16ms
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wrobell <[EMAIL PROTECTED]>
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