UM0851 datasheet(65/245 Pages) STMICROELECTRONICS

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UM0851

Communication device drivers

Doc ID 16604 Rev 2

65/245

USB human interface device (HID) class

The USB HID class describes human interface devices such as keyboard and mice.

●

USB mouse

Compile and then boot up the kernel with the options relevant to the USB mouse

enabled. The options are covered in the configuration section below.

Plug in the USB mouse. You can then see print output messages that are similar to the

following:

$ hub 1-0:1.0: over-current change on prot 1

usb 3-1:new low speed USB device using spear-ohci and address 3

usb-3.1: configuration #1 chosen from 1 choice

input: USB Optical Mouse as /class/input/input2

input: USB HID v1.11 Mouse[USB Optical Mouse] on usb-spear-ohci.0-1

/* Type in the following command to check if device has been recognized.*/

$ cat /proc/bus/usb/devices

Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=

3 Spd=1.5 MxCh= 0

Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=

Vendor=0461 ProdID=4d15 Rev= 2.00

Product=USB Optical Mouse

C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=100mA

I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID

) Sub=01 Prot=02 Driver=usbhid

Ad=81(I) Atr=03(Int.) MxPS=

4 Ivl=10ms

●

USB keyboard

Compile and then boot up the kernel with the options relevant to the USB keyboard

enabled. The options are covered in the configuration section below.

Plug in the USB keyboard. You can then see print output messages that are similar to

the following:

$ hub 1-0:1.0: over-current change on prot 1

usb 3-1:new full speed USB device using spear-ohci and address 4

usb-3.1: configuration #1 chosen from 1 choice

input: Dell Dell Smart Card Reader Keyboard as /class/input/input3

input: USB HID v1.11 Keyboard [Dell Dell Smart Card Reader Keyoard] on usb-

spear-ohci.0-1

$cat /proc/bus/usb/devices

Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=

4 Spd=12

MxCh= 0

Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=

Vendor=413c ProdID=2101 Rev= 1.00

Manufacturer=Dell

Product=Dell Smart Card Reader Keyboard

C:* #Ifs= 2 Cfg#= 1 Atr=a0 MxPwr=100mA

I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID

) Sub=01 Prot=01 Driver=usbhid

Ad=81(I) Atr=03(Int.) MxPS=

8 Ivl=24ms

I:* If#= 1 Alt= 0 #EPs= 3 Cls=0b(scard) Sub=00 Prot=00 Driver=(none)

Ad=02(O) Atr=02(Bulk) MxPS=

64 Ivl=0ms

Ad=82(I) Atr=02(Bulk) MxPS=

64 Ivl=0ms

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