737 lines
33 KiB
C
737 lines
33 KiB
C
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/*
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* UHID Example
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* This example emulates a basic 3 buttons mouse with wheel over UHID. Run this
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* program as root and then use the following keys to control the mouse:
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* q: Quit the application
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* 1: Toggle left button (down, up, ...)
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* 2: Toggle right button
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* 3: Toggle middle button
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* a: Move mouse left
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* d: Move mouse right
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* w: Move mouse up
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* s: Move mouse down
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* r: Move wheel up
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* f: Move wheel down
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*
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* Additionally to 3 button mouse, 3 keyboard LEDs are also supported (LED_NUML,
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* LED_CAPSL and LED_SCROLLL). The device doesn't generate any related keyboard
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* events, though. You need to manually write the EV_LED/LED_XY/1 activation
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* input event to the evdev device to see it being sent to this device.
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*
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* If uhid is not available as /dev/uhid, then you can pass a different path as
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* first argument.
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* If <linux/uhid.h> is not installed in /usr, then compile this with:
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* gcc -o ./uhid_test -Wall -I./include ./samples/uhid/uhid-example.c
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* And ignore the warning about kernel headers. However, it is recommended to
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* use the installed uhid.h if available.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include <linux/uhid.h>
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/*
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* HID Report Desciptor
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* We emulate a basic 3 button mouse with wheel and 3 keyboard LEDs. This is
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* the report-descriptor as the kernel will parse it:
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*
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* INPUT(1)[INPUT]
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* Field(0)
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* Physical(GenericDesktop.Pointer)
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* Application(GenericDesktop.Mouse)
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* Usage(3)
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* Button.0001
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* Button.0002
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* Button.0003
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* Logical Minimum(0)
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* Logical Maximum(1)
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* Report Size(1)
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* Report Count(3)
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* Report Offset(0)
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* Flags( Variable Absolute )
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* Field(1)
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* Physical(GenericDesktop.Pointer)
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* Application(GenericDesktop.Mouse)
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* Usage(3)
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* GenericDesktop.X
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* GenericDesktop.Y
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* GenericDesktop.Wheel
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* Logical Minimum(-128)
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* Logical Maximum(127)
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* Report Size(8)
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* Report Count(3)
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* Report Offset(8)
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* Flags( Variable Relative )
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* OUTPUT(2)[OUTPUT]
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* Field(0)
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* Application(GenericDesktop.Keyboard)
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* Usage(3)
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* LED.NumLock
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* LED.CapsLock
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* LED.ScrollLock
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* Logical Minimum(0)
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* Logical Maximum(1)
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* Report Size(1)
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* Report Count(3)
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* Report Offset(0)
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* Flags( Variable Absolute )
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*
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* This is the mapping that we expect:
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* Button.0001 ---> Key.LeftBtn
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* Button.0002 ---> Key.RightBtn
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* Button.0003 ---> Key.MiddleBtn
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* GenericDesktop.X ---> Relative.X
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* GenericDesktop.Y ---> Relative.Y
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* GenericDesktop.Wheel ---> Relative.Wheel
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* LED.NumLock ---> LED.NumLock
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* LED.CapsLock ---> LED.CapsLock
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* LED.ScrollLock ---> LED.ScrollLock
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*
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* This information can be verified by reading /sys/kernel/debug/hid/<dev>/rdesc
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* This file should print the same information as showed above.
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*/
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static unsigned char rdesc[] = {
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0x05, 0x01, /* Usage Page (Desktop), */
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0x09, 0x05, /* Usage (Gamepad), */
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0xA1, 0x01, /* Collection (Application), */
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0x85, 0x01, /* Report ID (1), */
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0x09, 0x30, /* Usage (X), */
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0x09, 0x31, /* Usage (Y), */
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0x09, 0x32, /* Usage (Z), */
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0x09, 0x35, /* Usage (Rz), */
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0x15, 0x00, /* Logical Minimum (0), */
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0x26, 0xFF, 0x00, /* Logical Maximum (255), */
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0x75, 0x08, /* Report Size (8), */
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0x95, 0x04, /* Report Count (4), */
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0x81, 0x02, /* Input (Variable), */
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0x09, 0x39, /* Usage (Hat Switch), */
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0x15, 0x00, /* Logical Minimum (0), */
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0x25, 0x07, /* Logical Maximum (7), */
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0x35, 0x00, /* Physical Minimum (0), */
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0x46, 0x3B, 0x01, /* Physical Maximum (315), */
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0x65, 0x14, /* Unit (Degrees), */
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0x75, 0x04, /* Report Size (4), */
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0x95, 0x01, /* Report Count (1), */
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0x81, 0x42, /* Input (Variable, Null State), */
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0x65, 0x00, /* Unit, */
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0x05, 0x09, /* Usage Page (Button), */
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0x19, 0x01, /* Usage Minimum (01h), */
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0x29, 0x0E, /* Usage Maximum (0Eh), */
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0x15, 0x00, /* Logical Minimum (0), */
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0x25, 0x01, /* Logical Maximum (1), */
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0x75, 0x01, /* Report Size (1), */
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0x95, 0x0E, /* Report Count (14), */
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0x81, 0x02, /* Input (Variable), */
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0x06, 0x00, 0xFF, /* Usage Page (FF00h), */
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0x09, 0x20, /* Usage (20h), */
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0x75, 0x06, /* Report Size (6), */
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0x95, 0x01, /* Report Count (1), */
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0x15, 0x00, /* Logical Minimum (0), */
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0x25, 0x3F, /* Logical Maximum (63), */
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0x81, 0x02, /* Input (Variable), */
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0x05, 0x01, /* Usage Page (Desktop), */
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0x09, 0x33, /* Usage (Rx), */
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0x09, 0x34, /* Usage (Ry), */
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0x15, 0x00, /* Logical Minimum (0), */
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0x26, 0xFF, 0x00, /* Logical Maximum (255), */
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0x75, 0x08, /* Report Size (8), */
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0x95, 0x02, /* Report Count (2), */
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0x81, 0x02, /* Input (Variable), */
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0x06, 0x00, 0xFF, /* Usage Page (FF00h), */
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0x09, 0x21, /* Usage (21h), */
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0x95, 0x03, /* Report Count (3), */
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0x81, 0x02, /* Input (Variable), */
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0x05, 0x01, /* Usage Page (Desktop), */
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0x19, 0x40, /* Usage Minimum (40h), */
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0x29, 0x42, /* Usage Maximum (42h), */
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0x16, 0x00, 0x80, /* Logical Minimum (-32768), */
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0x26, 0x00, 0x7F, /* Logical Maximum (32767), */
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0x75, 0x10, /* Report Size (16), */
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0x95, 0x03, /* Report Count (3), */
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0x81, 0x02, /* Input (Variable), */
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0x19, 0x43, /* Usage Minimum (43h), */
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0x29, 0x45, /* Usage Maximum (45h), */
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0x16, 0x00, 0xE0, /* Logical Minimum (-8192), */
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0x26, 0xFF, 0x1F, /* Logical Maximum (8191), */
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0x95, 0x03, /* Report Count (3), */
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0x81, 0x02, /* Input (Variable), */
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0x06, 0x00, 0xFF, /* Usage Page (FF00h), */
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0x09, 0x21, /* Usage (21h), */
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0x15, 0x00, /* Logical Minimum (0), */
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0x26, 0xFF, 0x00, /* Logical Maximum (255), */
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0x75, 0x08, /* Report Size (8), */
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0x95, 0x27, /* Report Count (39), */
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0x81, 0x02, /* Input (Variable), */
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0x85, 0x05, /* Report ID (5), */
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0x09, 0x22, /* Usage (22h), */
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0x95, 0x1F, /* Report Count (31), */
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0x91, 0x02, /* Output (Variable), */
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0x85, 0x04, /* Report ID (4), */
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0x09, 0x23, /* Usage (23h), */
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0x95, 0x24, /* Report Count (36), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x02, /* Report ID (2), */
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0x09, 0x24, /* Usage (24h), */
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0x95, 0x24, /* Report Count (36), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x08, /* Report ID (8), */
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0x09, 0x25, /* Usage (25h), */
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0x95, 0x03, /* Report Count (3), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x10, /* Report ID (16), */
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0x09, 0x26, /* Usage (26h), */
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0x95, 0x04, /* Report Count (4), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x11, /* Report ID (17), */
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0x09, 0x27, /* Usage (27h), */
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0x95, 0x02, /* Report Count (2), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x12, /* Report ID (18), */
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0x06, 0x02, 0xFF, /* Usage Page (FF02h), */
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0x09, 0x21, /* Usage (21h), */
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0x95, 0x0F, /* Report Count (15), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x13, /* Report ID (19), */
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0x09, 0x22, /* Usage (22h), */
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0x95, 0x16, /* Report Count (22), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x14, /* Report ID (20), */
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0x06, 0x05, 0xFF, /* Usage Page (FF05h), */
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0x09, 0x20, /* Usage (20h), */
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0x95, 0x10, /* Report Count (16), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x15, /* Report ID (21), */
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0x09, 0x21, /* Usage (21h), */
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0x95, 0x2C, /* Report Count (44), */
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0xB1, 0x02, /* Feature (Variable), */
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0x06, 0x80, 0xFF, /* Usage Page (FF80h), */
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0x85, 0x80, /* Report ID (128), */
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0x09, 0x20, /* Usage (20h), */
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0x95, 0x06, /* Report Count (6), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x81, /* Report ID (129), */
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0x09, 0x21, /* Usage (21h), */
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0x95, 0x06, /* Report Count (6), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x82, /* Report ID (130), */
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0x09, 0x22, /* Usage (22h), */
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0x95, 0x05, /* Report Count (5), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x83, /* Report ID (131), */
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0x09, 0x23, /* Usage (23h), */
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0x95, 0x01, /* Report Count (1), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x84, /* Report ID (132), */
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0x09, 0x24, /* Usage (24h), */
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0x95, 0x04, /* Report Count (4), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x85, /* Report ID (133), */
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0x09, 0x25, /* Usage (25h), */
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0x95, 0x06, /* Report Count (6), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x86, /* Report ID (134), */
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0x09, 0x26, /* Usage (26h), */
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0x95, 0x06, /* Report Count (6), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x87, /* Report ID (135), */
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0x09, 0x27, /* Usage (27h), */
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0x95, 0x23, /* Report Count (35), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x88, /* Report ID (136), */
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0x09, 0x28, /* Usage (28h), */
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0x95, 0x22, /* Report Count (34), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x89, /* Report ID (137), */
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0x09, 0x29, /* Usage (29h), */
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0x95, 0x02, /* Report Count (2), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x90, /* Report ID (144), */
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0x09, 0x30, /* Usage (30h), */
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0x95, 0x05, /* Report Count (5), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x91, /* Report ID (145), */
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0x09, 0x31, /* Usage (31h), */
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0x95, 0x03, /* Report Count (3), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x92, /* Report ID (146), */
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0x09, 0x32, /* Usage (32h), */
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0x95, 0x03, /* Report Count (3), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0x93, /* Report ID (147), */
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0x09, 0x33, /* Usage (33h), */
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0x95, 0x0C, /* Report Count (12), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xA0, /* Report ID (160), */
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0x09, 0x40, /* Usage (40h), */
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0x95, 0x06, /* Report Count (6), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xA1, /* Report ID (161), */
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0x09, 0x41, /* Usage (41h), */
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0x95, 0x01, /* Report Count (1), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xA2, /* Report ID (162), */
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0x09, 0x42, /* Usage (42h), */
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0x95, 0x01, /* Report Count (1), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xA3, /* Report ID (163), */
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0x09, 0x43, /* Usage (43h), */
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0x95, 0x30, /* Report Count (48), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xA4, /* Report ID (164), */
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0x09, 0x44, /* Usage (44h), */
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0x95, 0x0D, /* Report Count (13), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xA5, /* Report ID (165), */
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0x09, 0x45, /* Usage (45h), */
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0x95, 0x15, /* Report Count (21), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xA6, /* Report ID (166), */
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0x09, 0x46, /* Usage (46h), */
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0x95, 0x15, /* Report Count (21), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xF0, /* Report ID (240), */
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0x09, 0x47, /* Usage (47h), */
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0x95, 0x3F, /* Report Count (63), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xF1, /* Report ID (241), */
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0x09, 0x48, /* Usage (48h), */
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0x95, 0x3F, /* Report Count (63), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xF2, /* Report ID (242), */
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0x09, 0x49, /* Usage (49h), */
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0x95, 0x0F, /* Report Count (15), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xA7, /* Report ID (167), */
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0x09, 0x4A, /* Usage (4Ah), */
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0x95, 0x01, /* Report Count (1), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xA8, /* Report ID (168), */
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0x09, 0x4B, /* Usage (4Bh), */
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0x95, 0x01, /* Report Count (1), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xA9, /* Report ID (169), */
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0x09, 0x4C, /* Usage (4Ch), */
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0x95, 0x08, /* Report Count (8), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xAA, /* Report ID (170), */
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0x09, 0x4E, /* Usage (4Eh), */
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0x95, 0x01, /* Report Count (1), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xAB, /* Report ID (171), */
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0x09, 0x4F, /* Usage (4Fh), */
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0x95, 0x39, /* Report Count (57), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xAC, /* Report ID (172), */
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0x09, 0x50, /* Usage (50h), */
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0x95, 0x39, /* Report Count (57), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xAD, /* Report ID (173), */
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0x09, 0x51, /* Usage (51h), */
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0x95, 0x0B, /* Report Count (11), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xAE, /* Report ID (174), */
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0x09, 0x52, /* Usage (52h), */
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0x95, 0x01, /* Report Count (1), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xAF, /* Report ID (175), */
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0x09, 0x53, /* Usage (53h), */
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0x95, 0x02, /* Report Count (2), */
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0xB1, 0x02, /* Feature (Variable), */
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0x85, 0xB0, /* Report ID (176), */
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0x09, 0x54, /* Usage (54h), */
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0x95, 0x3F, /* Report Count (63), */
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0xB1, 0x02, /* Feature (Variable), */
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0xC0 /* End Collection */
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};
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static int uhid_write(int fd, const struct uhid_event *ev)
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{
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ssize_t ret;
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ret = write(fd, ev, sizeof(*ev));
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if (ret < 0) {
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fprintf(stderr, "Cannot write to uhid: %m\n");
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return -errno;
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} else if (ret != sizeof(*ev)) {
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fprintf(stderr, "Wrong size written to uhid: %zd != %zu\n",
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ret, sizeof(ev));
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return -EFAULT;
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} else {
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return 0;
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}
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}
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static int create(int fd)
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{
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struct uhid_event ev;
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memset(&ev, 0, sizeof(ev));
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ev.type = UHID_CREATE;
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strcpy((char*)ev.u.create.name, "Sony Corp. DualShock 4 [CUH-ZCT2x]");
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ev.u.create.rd_data = rdesc;
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ev.u.create.rd_size = sizeof(rdesc);
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ev.u.create.bus = BUS_USB;
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ev.u.create.vendor = 0x054C;
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ev.u.create.product = 0x09CC;
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ev.u.create.version = 0;
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ev.u.create.country = 0;
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return uhid_write(fd, &ev);
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}
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static void destroy(int fd)
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{
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struct uhid_event ev;
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memset(&ev, 0, sizeof(ev));
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ev.type = UHID_DESTROY;
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uhid_write(fd, &ev);
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}
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/* This parses raw output reports sent by the kernel to the device. A normal
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* uhid program shouldn't do this but instead just forward the raw report.
|
|
* However, for ducomentational purposes, we try to detect LED events here and
|
|
* print debug messages for it. */
|
|
static void handle_output(struct uhid_event *ev)
|
|
{
|
|
/* LED messages are adverised via OUTPUT reports; ignore the rest */
|
|
if (ev->u.output.rtype != UHID_OUTPUT_REPORT) {
|
|
|
|
|
|
return;
|
|
}
|
|
|
|
/* LED reports have length 2 bytes */
|
|
if (ev->u.output.size != 2)
|
|
return;
|
|
/* first byte is report-id which is 0x02 for LEDs in our rdesc */
|
|
if (ev->u.output.data[0] != 0x2)
|
|
return;
|
|
|
|
/* print flags payload */
|
|
fprintf(stderr, "LED output report received with flags %x\n",
|
|
ev->u.output.data[1]);
|
|
}
|
|
|
|
static int event(int fd)
|
|
{
|
|
struct uhid_event ev;
|
|
ssize_t ret;
|
|
|
|
memset(&ev, 0, sizeof(ev));
|
|
ret = read(fd, &ev, sizeof(ev));
|
|
if (ret == 0) {
|
|
fprintf(stderr, "Read HUP on uhid-cdev\n");
|
|
return -EFAULT;
|
|
} else if (ret < 0) {
|
|
fprintf(stderr, "Cannot read uhid-cdev: %m\n");
|
|
return -errno;
|
|
} else if (ret != sizeof(ev)) {
|
|
fprintf(stderr, "Invalid size read from uhid-dev: %zd != %zu\n",
|
|
ret, sizeof(ev));
|
|
return -EFAULT;
|
|
}
|
|
|
|
switch (ev.type) {
|
|
case UHID_START:
|
|
fprintf(stderr, "UHID_START from uhid-dev\n");
|
|
break;
|
|
case UHID_STOP:
|
|
fprintf(stderr, "UHID_STOP from uhid-dev\n");
|
|
break;
|
|
case UHID_OPEN:
|
|
fprintf(stderr, "UHID_OPEN from uhid-dev\n");
|
|
break;
|
|
case UHID_CLOSE:
|
|
fprintf(stderr, "UHID_CLOSE from uhid-dev\n");
|
|
break;
|
|
case UHID_OUTPUT:
|
|
fprintf(stderr, "UHID_OUTPUT from uhid-dev\n");
|
|
handle_output(&ev);
|
|
break;
|
|
case UHID_OUTPUT_EV:
|
|
fprintf(stderr, "UHID_OUTPUT_EV from uhid-dev\n");
|
|
break;
|
|
case UHID_GET_REPORT:
|
|
fprintf(stderr, "UHID_GET_REPORT from uhid-dev, report=%d\n", ev.u.get_report.rnum);
|
|
if (ev.u.get_report.rnum == 18) {
|
|
const struct uhid_event mac_addr_response = {
|
|
.type = UHID_GET_REPORT_REPLY,
|
|
.u = {
|
|
.get_report_reply = {
|
|
.size = 16,
|
|
.id = ev.u.get_report.id,
|
|
.err = 0,
|
|
.data = {
|
|
0x12, 0xf2, 0xa5, 0x71, 0x68, 0xaf, 0xdc, 0x08, 0x25, 0x00, 0x4c, 0x46, 0x49, 0x0e, 0x41, 0x00
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
uhid_write(fd, &mac_addr_response);
|
|
} else if (ev.u.get_report.rnum == 0xa3) {
|
|
const struct uhid_event firmware_info_response = {
|
|
.type = UHID_GET_REPORT_REPLY,
|
|
.u = {
|
|
.get_report_reply = {
|
|
.size = 49,
|
|
.id = ev.u.get_report.id,
|
|
.err = 0,
|
|
.data = {
|
|
/*0x40, 0x5d, 0xb0, 0xc4, 0xaa, 0x9c, 0xff, 0xff, 0x43, 0x02, 0x80, 0x08, 0x05, 0x00, 0x2d, 0x00,
|
|
0x93, 0x7b, 0x56, 0x65, 0x00, 0x00, 0x00, 0x00, 0x2c, 0x19, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x31, 0x00, 0x00, 0x00, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,*/
|
|
0xa3, 0x53, 0x65, 0x70, 0x20, 0x32, 0x31, 0x20, 0x32, 0x30, 0x31, 0x38, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x30, 0x34, 0x3a, 0x35, 0x30, 0x3a, 0x35, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x01, 0x0c, 0xb4, 0x01, 0x00, 0x00, 0x00, 0x0a, 0xa0, 0x10, 0x20, 0x00, 0xa0, 0x02,
|
|
0x00
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
uhid_write(fd, &firmware_info_response);
|
|
} else if (ev.u.get_report.rnum == 0x02) { // dualshock4_get_calibration_data
|
|
const struct uhid_event firmware_info_response = {
|
|
.type = UHID_GET_REPORT_REPLY,
|
|
.u = {
|
|
.get_report_reply = {
|
|
.size = 37,
|
|
.id = ev.u.get_report.id,
|
|
.err = 0,
|
|
.data = {
|
|
/*0x40, 0x5d, 0xb0, 0xc4, 0xaa, 0x9c, 0xff, 0xff, 0x43, 0x02, 0x80, 0x08, 0x05, 0x00, 0x2d, 0x00,
|
|
0x93, 0x7b, 0x56, 0x65, 0x00, 0x00, 0x00, 0x00, 0xe4, 0x24, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x25, 0x00, 0x00, 0x00, 0x25, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,*/
|
|
0x02, 0xf9, 0xff, 0x09, 0x00, 0xf9, 0xff, 0xfe, 0x22, 0xf4, 0xdc, 0xbb, 0x22, 0x59, 0xdd, 0x89,
|
|
0x22, 0x68, 0xdd, 0x1c, 0x02, 0x1c, 0x02, 0xd3, 0x20, 0x07, 0xdf, 0xbf, 0x20, 0xaa, 0xe0, 0xbc,
|
|
0x1e, 0x86, 0xe0, 0x06, 0x00,
|
|
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
uhid_write(fd, &firmware_info_response);
|
|
}
|
|
|
|
|
|
|
|
|
|
break;
|
|
default:
|
|
fprintf(stderr, "Invalid event from uhid-dev: %u\n", ev.type);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool btn1_down;
|
|
static bool btn2_down;
|
|
static bool btn3_down;
|
|
static signed char abs_hor;
|
|
static signed char abs_ver;
|
|
static signed char wheel;
|
|
|
|
static int send_event(int fd)
|
|
{
|
|
struct uhid_event ev;
|
|
|
|
memset(&ev, 0, sizeof(ev));
|
|
ev.type = UHID_INPUT;
|
|
ev.u.input.size = 5;
|
|
|
|
ev.u.input.data[0] = 0x1;
|
|
if (btn1_down)
|
|
ev.u.input.data[1] |= 0x1;
|
|
if (btn2_down)
|
|
ev.u.input.data[1] |= 0x2;
|
|
if (btn3_down)
|
|
ev.u.input.data[1] |= 0x4;
|
|
|
|
ev.u.input.data[2] = abs_hor;
|
|
ev.u.input.data[3] = abs_ver;
|
|
ev.u.input.data[4] = wheel;
|
|
|
|
return uhid_write(fd, &ev);
|
|
}
|
|
|
|
static int keyboard(int fd)
|
|
{
|
|
char buf[128];
|
|
ssize_t ret, i;
|
|
|
|
ret = read(STDIN_FILENO, buf, sizeof(buf));
|
|
if (ret == 0) {
|
|
fprintf(stderr, "Read HUP on stdin\n");
|
|
return -EFAULT;
|
|
} else if (ret < 0) {
|
|
fprintf(stderr, "Cannot read stdin: %m\n");
|
|
return -errno;
|
|
}
|
|
|
|
for (i = 0; i < ret; ++i) {
|
|
switch (buf[i]) {
|
|
case '1':
|
|
btn1_down = !btn1_down;
|
|
ret = send_event(fd);
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
case '2':
|
|
btn2_down = !btn2_down;
|
|
ret = send_event(fd);
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
case '3':
|
|
btn3_down = !btn3_down;
|
|
ret = send_event(fd);
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
case 'a':
|
|
abs_hor = -20;
|
|
ret = send_event(fd);
|
|
abs_hor = 0;
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
case 'd':
|
|
abs_hor = 20;
|
|
ret = send_event(fd);
|
|
abs_hor = 0;
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
case 'w':
|
|
abs_ver = -20;
|
|
ret = send_event(fd);
|
|
abs_ver = 0;
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
case 's':
|
|
abs_ver = 20;
|
|
ret = send_event(fd);
|
|
abs_ver = 0;
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
case 'r':
|
|
wheel = 1;
|
|
ret = send_event(fd);
|
|
wheel = 0;
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
case 'f':
|
|
wheel = -1;
|
|
ret = send_event(fd);
|
|
wheel = 0;
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
case 'q':
|
|
return -ECANCELED;
|
|
default:
|
|
fprintf(stderr, "Invalid input: %c\n", buf[i]);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int fd;
|
|
const char *path = "/dev/uhid";
|
|
struct pollfd pfds[2];
|
|
int ret;
|
|
struct termios state;
|
|
|
|
ret = tcgetattr(STDIN_FILENO, &state);
|
|
if (ret) {
|
|
fprintf(stderr, "Cannot get tty state\n");
|
|
} else {
|
|
state.c_lflag &= ~ICANON;
|
|
state.c_cc[VMIN] = 1;
|
|
ret = tcsetattr(STDIN_FILENO, TCSANOW, &state);
|
|
if (ret)
|
|
fprintf(stderr, "Cannot set tty state\n");
|
|
}
|
|
|
|
if (argc >= 2) {
|
|
if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
|
|
fprintf(stderr, "Usage: %s [%s]\n", argv[0], path);
|
|
return EXIT_SUCCESS;
|
|
} else {
|
|
path = argv[1];
|
|
}
|
|
}
|
|
|
|
fprintf(stderr, "Open uhid-cdev %s\n", path);
|
|
fd = open(path, O_RDWR | O_CLOEXEC);
|
|
if (fd < 0) {
|
|
fprintf(stderr, "Cannot open uhid-cdev %s: %m\n", path);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
fprintf(stderr, "Create uhid device\n");
|
|
ret = create(fd);
|
|
if (ret) {
|
|
close(fd);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
pfds[0].fd = STDIN_FILENO;
|
|
pfds[0].events = POLLIN;
|
|
pfds[1].fd = fd;
|
|
pfds[1].events = POLLIN;
|
|
|
|
fprintf(stderr, "Press 'q' to quit...\n");
|
|
while (1) {
|
|
ret = poll(pfds, 2, -1);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Cannot poll for fds: %m\n");
|
|
break;
|
|
}
|
|
if (pfds[0].revents & POLLHUP) {
|
|
fprintf(stderr, "Received HUP on stdin\n");
|
|
break;
|
|
}
|
|
if (pfds[1].revents & POLLHUP) {
|
|
fprintf(stderr, "Received HUP on uhid-cdev\n");
|
|
break;
|
|
}
|
|
|
|
if (pfds[0].revents & POLLIN) {
|
|
ret = keyboard(fd);
|
|
if (ret)
|
|
break;
|
|
}
|
|
if (pfds[1].revents & POLLIN) {
|
|
ret = event(fd);
|
|
if (ret)
|
|
break;
|
|
}
|
|
}
|
|
|
|
fprintf(stderr, "Destroy uhid device\n");
|
|
destroy(fd);
|
|
return EXIT_SUCCESS;
|
|
}
|