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Mixed HID descriptors

DISCUSSION Nuno Santos 3 participants 3 messages Feb 20, 2014 – Feb 25, 2014 HID

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#0 lore raw

Hi,

We are developing an HID multitouch device and we want to make it fully compatible with Linux and Windows.

The device descriptor describes a mouse, keyboard and multitouch digitizer as well as a set of features. When we have mouse or keyboard descriptor along the touch device I can no longer get or set features. It gives me a timeout error:

ioctl (GFEATURE): Connection timed out

This only happens in Linux.

I would like to know if this is normal, or if there is anyway of getting more information about the parsing itself in order to understand the problem.

Below is the device report descriptor

__ALIGN_BEGIN
static uint8_t HID_ReportDesc[]
__ALIGN_END =

{
    #if 0 // IS MESSING HID ON LINUX
    0x05, 0x01,                            // Usage Page (Generic Desktop)
    0x09, 0x06,                            // Usage (Keyboard)
    0xA1, 0x01,                            // Collection (Application)
    0x85, REPORTID_KEYBOARD,               //   REPORT_ID (Mouse)
    0x05, 0x07,                            //   Usage page (Key Codes)
    0x19, 0xE0,                            //   Usage minimum (224)
    0x29, 0xE7,                            //   Usage maximum (231)
    0x15, 0x00,                            //   Logical minimum (0)
    0x25, 0x01,                            //   Logical maximum (1)
    0x75, 0x01,                            //   Report size (1)
    0x95, 0x08,                            //   Report count (8)
    0x81, 0x02,                            //   Input (data, variable, 
absolute)
    0x95, 0x01,                            //   Report count (1)
    0x75, 0x08,                            //   Report size (8)
    0x81, 0x01,                            //   Input (constant)
    0x95, 0x06,                            //   Report count (6)
    0x75, 0x08,                            //   Report size (8)
    0x15, 0x00,                            //   Logical minimum (0)
    0x25, 0x65,                            //   Logical maximum (101)
    0x05, 0x07,                            //   Usage page (key codes)
    0x19, 0x00,                            //   Usage minimum (0)
    0x29, 0x65,                            //   Usage maximum (101)
    0x81, 0x00,                            //   Input (data, array)
    0xC0,
    #endif

    #if 0 // IS MESSING HID ON LINUX
    0x05, 0x01,                         // USAGE_PAGE (Generic Desktop)
    0x09, 0x01,                         // USAGE (Pointer)
    0xa1, 0x01,                         // COLLECTION (Application)
    0x85, REPORTID_MOUSE,               //   REPORT_ID (Mouse)
    0x09, 0x01,                         //   USAGE (Pointer)
    0xa1, 0x00,                         //   COLLECTION (Physical)
    0x05, 0x09,                         //     USAGE_PAGE (Buttons)
    0x09, 0x01,                         //     USAGE (Button 1)
    0x95, 0x01,                         //     REPORT_COUNT (1)
    0x75, 0x01,                         //     REPORT_SIZE (1)
    0x15, 0x00,                         //     LOGICAL_MINIMUM (0)
    0x25, 0x01,                         //     LOGICAL_MAXIMUM (1)
    0x81, 0x02,                         //     INPUT (Data,Var,Abs)
    0x95, 0x07,                         //     REPORT_COUNT (7)
    0x75, 0x01,                         //     REPORT_SIZE (1)
    0x81, 0x03,                         //     INPUT (Const,Var,Abs)
    0x95, 0x08,                         //     REPORT_COUNT (8)
    0x75, 0x01,                         //     REPORT_SIZE (1)
    0x81, 0x03,                         //     INPUT (Const,Var,Abs)
    0x05, 0x01,                         //     USAGE_PAGE (Generic Desktop)
    0x09, 0x30,                         //     USAGE (X)
    0x09, 0x31,                         //     USAGE (Y)
    0x15, 0x00,                         //     LOGICAL_MINIMUM (0)
    0x26, 0xff, 0x7f,                   //     LOGICAL_MAXIMUM (32767)
    0x35, 0x00,                         //     PHYSICAL_MINIMUM (0)
    0x46, 0x00, 0x00,                   //     PHYSICAL_MAXIMUM (0)
    0x95, 0x02,                         //     REPORT_COUNT (2)
    0x75, 0x10,                         //     REPORT_SIZE (16)
    0x81, 0x02,                         //     INPUT (Data,Var,Abs)
    0xc0,                               //   END_COLLECTION
    0xa1, 0x02,                         //   COLLECTION (Logical)
    0x15, 0x00,                         //     LOGICAL_MINIMUM (0)
    0x26, 0xff, 0x00,                   //     LOGICAL_MAXIMUM (255)
    0x09, 0x01,                         //     USAGE (Pointer)
    0x95, 0x39,                         //     REPORT_COUNT (57)
    0x75, 0x08,                         //     REPORT_SIZE (8)
    0x81, 0x01,                         //     INPUT (Data,Var,Abs)
    0xc0,                               //   END_COLLECTION
    0xc0,                               // END_COLLECTION
    #endif

    #if 1
    0x05, 0x0d,                            // USAGE_PAGE (Digitizers)
    0x09, 0x0E,                         // USAGE (Configuration)
    0xa1, 0x01,                         // COLLECTION (Application)
    0x85, REPORTID_MODE,                 //   REPORT_ID (Feature)
    0x09, 0x23,                         //   USAGE (Device Settings)
    0xa1, 0x02,                         //   COLLECTION (logical)
    0x09, 0x52,                         //     USAGE (Device Mode)
    0x09, 0x53,                         //     USAGE (Device Index)
    0x15, 0x00,                         //     LOGICAL_MINIMUM (0)
    0x25, 0x28,                         //     LOGICAL_MAXIMUM (40)
    0x75, 0x08,                         //     REPORT_SIZE (8)
    0x95, 0x02,                         //     REPORT_COUNT (2)
    0xb1, 0x02,                         //     FEATURE (Data,Var,Abs)
    0xc0,                               //   END_COLLECTION
    0xc0,                               // END_COLLECTION

    0x09, 0x04,                            // USAGE (Touch Screen)
    0xa1, 0x01,                         // COLLECTION (Application)
    0x85, REPORTID_TOUCH,               //      REPORT_ID (Touch)
    0x09, 0x22,                         //   USAGE (Finger)

    0x05, 0x0d,                         /*     USAGE_PAGE 
(Digitizers)          */
    0xa1, 0x02,                         /*     COLLECTION 
(Logical)             */
    0x09, 0x42,                         /*       USAGE (Tip 
Switch)             */
    0x15, 0x00,                         /*       LOGICAL_MINIMUM 
(0)            */
    0x25, 0x01,                         /*       LOGICAL_MAXIMUM 
(1)            */
    0x75, 0x01,                         /*       REPORT_SIZE 
(1)                */
    0x95, 0x01,                         /*       REPORT_COUNT 
(1)               */
    0x81, 0x02,                         /*       INPUT 
(Data,Var,Abs)           */
    0x09, 0x32,                         /*       USAGE (In 
Range)               */
    0x81, 0x02,                         /*       INPUT 
(Data,Var,Abs)           */
    0x09, 0x47,                         /*       USAGE 
(Confidence)             */
    0x81, 0x02,                         /*       INPUT 
(Data,Var,Abs)           */
    0x95, 0x05,                         /*       REPORT_COUNT 
(5)               */
    0x81, 0x03,                         /*       INPUT 
(Cnst,Ary,Abs)           */
    0x09, 0x51,                         /*       USAGE (Contact 
Identifier)     */
    0x75, 0x08,                         /*       REPORT_SIZE 
(8)                */
    0x95, 0x01,                         /*       REPORT_COUNT 
(1)               */
    0x81, 0x02,                         /*       INPUT 
(Data,Var,Abs)           */
    0xa1, 0x00,                         /*       COLLECTION 
(Physical)          */
    0x05, 0x01,                         /*         USAGE_PAGE (Generic 
Desktop) */
    0x15, 0x00,                         /*         LOGICAL_MINIMUM 
(0)          */
    0x26, 0x3A, 0x20,                   /*         LOGICAL_MAXIMUM 
(8200)       */
    0x75, 0x10,                         /*         REPORT_SIZE 
(16)             */
    0x09, 0x30,                         /*         USAGE 
(X)                    */
    0x81, 0x02,                         /*         INPUT 
(Data,Var,Abs)         */
    0x15, 0x00,                         /*         LOGICAL_MINIMUM 
(0)          */
    0x26, 0x5C, 0x12,                   /*         LOGICAL_MAXIMUM 
(4700)       */
    0x09, 0x31,                         /*         USAGE 
(Y)                    */
    0x81, 0x02,                         /*         INPUT 
(Data,Var,Abs)         */
    0x05, 0x0d,                         /*         USAGE_PAGE 
(Digitizers)      */
    0x09, 0x30,                         /*         USAGE 
(X)                    */
    0x75, 0x10,                         /*         REPORT_SIZE 
(16)             */
    0x95, 0x01,                         /*         REPORT_COUNT 
(1)             */
    0x81, 0x02,                         /*         INPUT 
(Data,Var,Abs)         */
    0xc0,                               /* 
END_COLLECTION                  */
    0xc0,                               /* 

END_COLLECTION */

    0x05, 0x0d,                         //   USAGE_PAGE (Digitizers)
    0x09, 0x54,                         //   USAGE (Actual count)
    0x15, 0x00,                         //   LOGICAL_MAXIMUM (0)
    0x25, 0x14,                         //   LOGICAL_MAXIMUM (20)
    0x95, 0x01,                         //   REPORT_COUNT (1)
    0x75, 0x08,                         //   REPORT_SIZE (8)
    0x81, 0x02,                         //   INPUT (Data,Var,Abs)
    0x85, REPORTID_MAX_COUNT,           //   REPORT_ID (Feature)
    0x09, 0x55,                         //   USAGE(Maximum Count)
    0x15, 0x00,                         //   LOGICAL_MINIMUM (0)
    0x25, 0x14,                         //   LOGICAL_MAXIMUM (20)
    0x95, 0x01,                         //   REPORT_COUNT (1)
    0x75, 0x08,                         //   REPORT_SIZE (8)
    0xb1, 0x02,                         //   FEATURE (Data,Var,Abs)
    0xc0,                               // END_COLLECTION
    #endif

    #if 1
    0x09, 0x00,                            // USAGE (Undefined)
    0xa1, 0x01,                         // COLLECTION (Application)
    0x85, REPORTID_ENABLE,              //   REPORT_ID (Feature)
    0x09, 0x00,                         //   USAGE(Undefined)
    0x95, 0x01,                         //   REPORT_COUNT (1)
    0x75, 0x08,                         //   REPORT_SIZE (8)
    0xb1, 0x02,                         //   FEATURE (Data,Var,Abs)
    0x85, REPORTID_GAIN,                //   REPORT_ID (Feature)
    0x09, 0x00,                         //   USAGE(Undefined)
    0x15, 0x00,                         //   LOGICAL_MINIMUM (0)
    0x25, 0x07,                         //   LOGICAL_MAXIMUM (7)
    0x95, 0x01,                         //   REPORT_COUNT (1)
    0x75, 0x08,                         //   REPORT_SIZE (8)
    0xb1, 0x02,                         //   FEATURE (Data,Var,Abs)
    0xc0,                               // END_COLLECTION
    #endif
};

With my best regards,

Nuno Santos
www.displax.com

#1 lore raw

Hi

CC Jiri, Benjamin and Henrik

Quoted 12 lines · Nuno Santos

Hi,

We are developing an HID multitouch device and we want to make it fully compatible with Linux and Windows.

The device descriptor describes a mouse, keyboard and multitouch digitizer as well as a set of features. When we have mouse or keyboard descriptor along the touch device I can no longer get or set features. It gives me a timeout error:

ioctl (GFEATURE): Connection timed out

Quoted 7 lines

This only happens in Linux.

I would like to know if this is normal, or if there is anyway of getting more information about the parsing itself in order to understand the problem.

Below is the device report descriptor

I don't have much time to test it myself, but you can get a lot of debug information via debugfs. Most distros enable it by default. Try looking into /sys/kernel/debug/hid/<dev>/
These debugfs files contain runtime information about HID internals.

Thanks
David

Quoted 214 lines

__ALIGN_BEGIN
static uint8_t HID_ReportDesc[]
__ALIGN_END =

{
    #if 0 // IS MESSING HID ON LINUX
    0x05, 0x01,                            // Usage Page (Generic Desktop)
    0x09, 0x06,                            // Usage (Keyboard)
    0xA1, 0x01,                            // Collection (Application)
    0x85, REPORTID_KEYBOARD,               //   REPORT_ID (Mouse)
    0x05, 0x07,                            //   Usage page (Key Codes)
    0x19, 0xE0,                            //   Usage minimum (224)
    0x29, 0xE7,                            //   Usage maximum (231)
    0x15, 0x00,                            //   Logical minimum (0)
    0x25, 0x01,                            //   Logical maximum (1)
    0x75, 0x01,                            //   Report size (1)
    0x95, 0x08,                            //   Report count (8)
    0x81, 0x02,                            //   Input (data, variable,
absolute)
    0x95, 0x01,                            //   Report count (1)
    0x75, 0x08,                            //   Report size (8)
    0x81, 0x01,                            //   Input (constant)
    0x95, 0x06,                            //   Report count (6)
    0x75, 0x08,                            //   Report size (8)
    0x15, 0x00,                            //   Logical minimum (0)
    0x25, 0x65,                            //   Logical maximum (101)
    0x05, 0x07,                            //   Usage page (key codes)
    0x19, 0x00,                            //   Usage minimum (0)
    0x29, 0x65,                            //   Usage maximum (101)
    0x81, 0x00,                            //   Input (data, array)
    0xC0,
    #endif

    #if 0 // IS MESSING HID ON LINUX
    0x05, 0x01,                         // USAGE_PAGE (Generic Desktop)
    0x09, 0x01,                         // USAGE (Pointer)
    0xa1, 0x01,                         // COLLECTION (Application)
    0x85, REPORTID_MOUSE,               //   REPORT_ID (Mouse)
    0x09, 0x01,                         //   USAGE (Pointer)
    0xa1, 0x00,                         //   COLLECTION (Physical)
    0x05, 0x09,                         //     USAGE_PAGE (Buttons)
    0x09, 0x01,                         //     USAGE (Button 1)
    0x95, 0x01,                         //     REPORT_COUNT (1)
    0x75, 0x01,                         //     REPORT_SIZE (1)
    0x15, 0x00,                         //     LOGICAL_MINIMUM (0)
    0x25, 0x01,                         //     LOGICAL_MAXIMUM (1)
    0x81, 0x02,                         //     INPUT (Data,Var,Abs)
    0x95, 0x07,                         //     REPORT_COUNT (7)
    0x75, 0x01,                         //     REPORT_SIZE (1)
    0x81, 0x03,                         //     INPUT (Const,Var,Abs)
    0x95, 0x08,                         //     REPORT_COUNT (8)
    0x75, 0x01,                         //     REPORT_SIZE (1)
    0x81, 0x03,                         //     INPUT (Const,Var,Abs)
    0x05, 0x01,                         //     USAGE_PAGE (Generic Desktop)
    0x09, 0x30,                         //     USAGE (X)
    0x09, 0x31,                         //     USAGE (Y)
    0x15, 0x00,                         //     LOGICAL_MINIMUM (0)
    0x26, 0xff, 0x7f,                   //     LOGICAL_MAXIMUM (32767)
    0x35, 0x00,                         //     PHYSICAL_MINIMUM (0)
    0x46, 0x00, 0x00,                   //     PHYSICAL_MAXIMUM (0)
    0x95, 0x02,                         //     REPORT_COUNT (2)
    0x75, 0x10,                         //     REPORT_SIZE (16)
    0x81, 0x02,                         //     INPUT (Data,Var,Abs)
    0xc0,                               //   END_COLLECTION
    0xa1, 0x02,                         //   COLLECTION (Logical)
    0x15, 0x00,                         //     LOGICAL_MINIMUM (0)
    0x26, 0xff, 0x00,                   //     LOGICAL_MAXIMUM (255)
    0x09, 0x01,                         //     USAGE (Pointer)
    0x95, 0x39,                         //     REPORT_COUNT (57)
    0x75, 0x08,                         //     REPORT_SIZE (8)
    0x81, 0x01,                         //     INPUT (Data,Var,Abs)
    0xc0,                               //   END_COLLECTION
    0xc0,                               // END_COLLECTION
    #endif

    #if 1
    0x05, 0x0d,                            // USAGE_PAGE (Digitizers)
    0x09, 0x0E,                         // USAGE (Configuration)
    0xa1, 0x01,                         // COLLECTION (Application)
    0x85, REPORTID_MODE,                 //   REPORT_ID (Feature)
    0x09, 0x23,                         //   USAGE (Device Settings)
    0xa1, 0x02,                         //   COLLECTION (logical)
    0x09, 0x52,                         //     USAGE (Device Mode)
    0x09, 0x53,                         //     USAGE (Device Index)
    0x15, 0x00,                         //     LOGICAL_MINIMUM (0)
    0x25, 0x28,                         //     LOGICAL_MAXIMUM (40)
    0x75, 0x08,                         //     REPORT_SIZE (8)
    0x95, 0x02,                         //     REPORT_COUNT (2)
    0xb1, 0x02,                         //     FEATURE (Data,Var,Abs)
    0xc0,                               //   END_COLLECTION
    0xc0,                               // END_COLLECTION

    0x09, 0x04,                            // USAGE (Touch Screen)
    0xa1, 0x01,                         // COLLECTION (Application)
    0x85, REPORTID_TOUCH,               //      REPORT_ID (Touch)
    0x09, 0x22,                         //   USAGE (Finger)

    0x05, 0x0d,                         /*     USAGE_PAGE (Digitizers)
*/
    0xa1, 0x02,                         /*     COLLECTION (Logical)
*/
    0x09, 0x42,                         /*       USAGE (Tip Switch)
*/
    0x15, 0x00,                         /*       LOGICAL_MINIMUM (0)
*/
    0x25, 0x01,                         /*       LOGICAL_MAXIMUM (1)
*/
    0x75, 0x01,                         /*       REPORT_SIZE (1)
*/
    0x95, 0x01,                         /*       REPORT_COUNT (1)
*/
    0x81, 0x02,                         /*       INPUT (Data,Var,Abs)
*/
    0x09, 0x32,                         /*       USAGE (In Range)
*/
    0x81, 0x02,                         /*       INPUT (Data,Var,Abs)
*/
    0x09, 0x47,                         /*       USAGE (Confidence)
*/
    0x81, 0x02,                         /*       INPUT (Data,Var,Abs)
*/
    0x95, 0x05,                         /*       REPORT_COUNT (5)
*/
    0x81, 0x03,                         /*       INPUT (Cnst,Ary,Abs)
*/
    0x09, 0x51,                         /*       USAGE (Contact Identifier)
*/
    0x75, 0x08,                         /*       REPORT_SIZE (8)
*/
    0x95, 0x01,                         /*       REPORT_COUNT (1)
*/
    0x81, 0x02,                         /*       INPUT (Data,Var,Abs)
*/
    0xa1, 0x00,                         /*       COLLECTION (Physical)
*/
    0x05, 0x01,                         /*         USAGE_PAGE (Generic
Desktop) */
    0x15, 0x00,                         /*         LOGICAL_MINIMUM (0)
*/
    0x26, 0x3A, 0x20,                   /*         LOGICAL_MAXIMUM (8200)
*/
    0x75, 0x10,                         /*         REPORT_SIZE (16)
*/
    0x09, 0x30,                         /*         USAGE (X)
*/
    0x81, 0x02,                         /*         INPUT (Data,Var,Abs)
*/
    0x15, 0x00,                         /*         LOGICAL_MINIMUM (0)
*/
    0x26, 0x5C, 0x12,                   /*         LOGICAL_MAXIMUM (4700)
*/
    0x09, 0x31,                         /*         USAGE (Y)
*/
    0x81, 0x02,                         /*         INPUT (Data,Var,Abs)
*/
    0x05, 0x0d,                         /*         USAGE_PAGE (Digitizers)
*/
    0x09, 0x30,                         /*         USAGE (X)
*/
    0x75, 0x10,                         /*         REPORT_SIZE (16)
*/
    0x95, 0x01,                         /*         REPORT_COUNT (1)
*/
    0x81, 0x02,                         /*         INPUT (Data,Var,Abs)
*/
    0xc0,                               /* END_COLLECTION
*/
    0xc0,                               /* END_COLLECTION

*/

    0x05, 0x0d,                         //   USAGE_PAGE (Digitizers)
    0x09, 0x54,                         //   USAGE (Actual count)
    0x15, 0x00,                         //   LOGICAL_MAXIMUM (0)
    0x25, 0x14,                         //   LOGICAL_MAXIMUM (20)
    0x95, 0x01,                         //   REPORT_COUNT (1)
    0x75, 0x08,                         //   REPORT_SIZE (8)
    0x81, 0x02,                         //   INPUT (Data,Var,Abs)
    0x85, REPORTID_MAX_COUNT,           //   REPORT_ID (Feature)
    0x09, 0x55,                         //   USAGE(Maximum Count)
    0x15, 0x00,                         //   LOGICAL_MINIMUM (0)
    0x25, 0x14,                         //   LOGICAL_MAXIMUM (20)
    0x95, 0x01,                         //   REPORT_COUNT (1)
    0x75, 0x08,                         //   REPORT_SIZE (8)
    0xb1, 0x02,                         //   FEATURE (Data,Var,Abs)
    0xc0,                               // END_COLLECTION
    #endif

    #if 1
    0x09, 0x00,                            // USAGE (Undefined)
    0xa1, 0x01,                         // COLLECTION (Application)
    0x85, REPORTID_ENABLE,              //   REPORT_ID (Feature)
    0x09, 0x00,                         //   USAGE(Undefined)
    0x95, 0x01,                         //   REPORT_COUNT (1)
    0x75, 0x08,                         //   REPORT_SIZE (8)
    0xb1, 0x02,                         //   FEATURE (Data,Var,Abs)
    0x85, REPORTID_GAIN,                //   REPORT_ID (Feature)
    0x09, 0x00,                         //   USAGE(Undefined)
    0x15, 0x00,                         //   LOGICAL_MINIMUM (0)
    0x25, 0x07,                         //   LOGICAL_MAXIMUM (7)
    0x95, 0x01,                         //   REPORT_COUNT (1)
    0x75, 0x08,                         //   REPORT_SIZE (8)
    0xb1, 0x02,                         //   FEATURE (Data,Var,Abs)
    0xc0,                               // END_COLLECTION
    #endif
};

With my best regards,

Nuno Santos
www.displax.com
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#2 lore raw
Quoted 22 lines · David Herrmann

Hi

CC Jiri, Benjamin and Henrik

Quoted 17 lines · Nuno Santos

Hi,

We are developing an HID multitouch device and we want to make it fully compatible with Linux and Windows.

The device descriptor describes a mouse, keyboard and multitouch digitizer as well as a set of features. When we have mouse or keyboard descriptor along the touch device I can no longer get or set features. It gives me a timeout error:

ioctl (GFEATURE): Connection timed out

This only happens in Linux.

I would like to know if this is normal, or if there is anyway of getting more information about the parsing itself in order to understand the problem.

The only reason I can think of is that the driver at init used to call GET_REPORT on all the input reports, and this is known to be broken on many devices.
I added in v3.12 a quirk which is default for win 8 certified multitouch devices: HID_QUIRK_NO_INIT_INPUT_REPORTS.
If you force your device to use this quirk, the behavior at connect should be the same across all platforms, and hopefully, you will not encounter this error anymore.
If you are running an older kernel, you can try using HID_QUIRK_NO_INIT_REPORTS, but that means that the features will not be called at plug (it all depend if you need to access the values of these features at plug or not).

Cheers,
Benjamin

Quoted 225 lines
Quoted 2 lines

Below is the device report descriptor

I don't have much time to test it myself, but you can get a lot of debug information via debugfs. Most distros enable it by default. Try looking into /sys/kernel/debug/hid/<dev>/
These debugfs files contain runtime information about HID internals.

Thanks
David

Quoted 214 lines

__ALIGN_BEGIN
static uint8_t HID_ReportDesc[]
__ALIGN_END =

{
    #if 0 // IS MESSING HID ON LINUX
    0x05, 0x01,                            // Usage Page (Generic Desktop)
    0x09, 0x06,                            // Usage (Keyboard)
    0xA1, 0x01,                            // Collection (Application)
    0x85, REPORTID_KEYBOARD,               //   REPORT_ID (Mouse)
    0x05, 0x07,                            //   Usage page (Key Codes)
    0x19, 0xE0,                            //   Usage minimum (224)
    0x29, 0xE7,                            //   Usage maximum (231)
    0x15, 0x00,                            //   Logical minimum (0)
    0x25, 0x01,                            //   Logical maximum (1)
    0x75, 0x01,                            //   Report size (1)
    0x95, 0x08,                            //   Report count (8)
    0x81, 0x02,                            //   Input (data, variable,
absolute)
    0x95, 0x01,                            //   Report count (1)
    0x75, 0x08,                            //   Report size (8)
    0x81, 0x01,                            //   Input (constant)
    0x95, 0x06,                            //   Report count (6)
    0x75, 0x08,                            //   Report size (8)
    0x15, 0x00,                            //   Logical minimum (0)
    0x25, 0x65,                            //   Logical maximum (101)
    0x05, 0x07,                            //   Usage page (key codes)
    0x19, 0x00,                            //   Usage minimum (0)
    0x29, 0x65,                            //   Usage maximum (101)
    0x81, 0x00,                            //   Input (data, array)
    0xC0,
    #endif

    #if 0 // IS MESSING HID ON LINUX
    0x05, 0x01,                         // USAGE_PAGE (Generic Desktop)
    0x09, 0x01,                         // USAGE (Pointer)
    0xa1, 0x01,                         // COLLECTION (Application)
    0x85, REPORTID_MOUSE,               //   REPORT_ID (Mouse)
    0x09, 0x01,                         //   USAGE (Pointer)
    0xa1, 0x00,                         //   COLLECTION (Physical)
    0x05, 0x09,                         //     USAGE_PAGE (Buttons)
    0x09, 0x01,                         //     USAGE (Button 1)
    0x95, 0x01,                         //     REPORT_COUNT (1)
    0x75, 0x01,                         //     REPORT_SIZE (1)
    0x15, 0x00,                         //     LOGICAL_MINIMUM (0)
    0x25, 0x01,                         //     LOGICAL_MAXIMUM (1)
    0x81, 0x02,                         //     INPUT (Data,Var,Abs)
    0x95, 0x07,                         //     REPORT_COUNT (7)
    0x75, 0x01,                         //     REPORT_SIZE (1)
    0x81, 0x03,                         //     INPUT (Const,Var,Abs)
    0x95, 0x08,                         //     REPORT_COUNT (8)
    0x75, 0x01,                         //     REPORT_SIZE (1)
    0x81, 0x03,                         //     INPUT (Const,Var,Abs)
    0x05, 0x01,                         //     USAGE_PAGE (Generic Desktop)
    0x09, 0x30,                         //     USAGE (X)
    0x09, 0x31,                         //     USAGE (Y)
    0x15, 0x00,                         //     LOGICAL_MINIMUM (0)
    0x26, 0xff, 0x7f,                   //     LOGICAL_MAXIMUM (32767)
    0x35, 0x00,                         //     PHYSICAL_MINIMUM (0)
    0x46, 0x00, 0x00,                   //     PHYSICAL_MAXIMUM (0)
    0x95, 0x02,                         //     REPORT_COUNT (2)
    0x75, 0x10,                         //     REPORT_SIZE (16)
    0x81, 0x02,                         //     INPUT (Data,Var,Abs)
    0xc0,                               //   END_COLLECTION
    0xa1, 0x02,                         //   COLLECTION (Logical)
    0x15, 0x00,                         //     LOGICAL_MINIMUM (0)
    0x26, 0xff, 0x00,                   //     LOGICAL_MAXIMUM (255)
    0x09, 0x01,                         //     USAGE (Pointer)
    0x95, 0x39,                         //     REPORT_COUNT (57)
    0x75, 0x08,                         //     REPORT_SIZE (8)
    0x81, 0x01,                         //     INPUT (Data,Var,Abs)
    0xc0,                               //   END_COLLECTION
    0xc0,                               // END_COLLECTION
    #endif

    #if 1
    0x05, 0x0d,                            // USAGE_PAGE (Digitizers)
    0x09, 0x0E,                         // USAGE (Configuration)
    0xa1, 0x01,                         // COLLECTION (Application)
    0x85, REPORTID_MODE,                 //   REPORT_ID (Feature)
    0x09, 0x23,                         //   USAGE (Device Settings)
    0xa1, 0x02,                         //   COLLECTION (logical)
    0x09, 0x52,                         //     USAGE (Device Mode)
    0x09, 0x53,                         //     USAGE (Device Index)
    0x15, 0x00,                         //     LOGICAL_MINIMUM (0)
    0x25, 0x28,                         //     LOGICAL_MAXIMUM (40)
    0x75, 0x08,                         //     REPORT_SIZE (8)
    0x95, 0x02,                         //     REPORT_COUNT (2)
    0xb1, 0x02,                         //     FEATURE (Data,Var,Abs)
    0xc0,                               //   END_COLLECTION
    0xc0,                               // END_COLLECTION

    0x09, 0x04,                            // USAGE (Touch Screen)
    0xa1, 0x01,                         // COLLECTION (Application)
    0x85, REPORTID_TOUCH,               //      REPORT_ID (Touch)
    0x09, 0x22,                         //   USAGE (Finger)

    0x05, 0x0d,                         /*     USAGE_PAGE (Digitizers)
*/
    0xa1, 0x02,                         /*     COLLECTION (Logical)
*/
    0x09, 0x42,                         /*       USAGE (Tip Switch)
*/
    0x15, 0x00,                         /*       LOGICAL_MINIMUM (0)
*/
    0x25, 0x01,                         /*       LOGICAL_MAXIMUM (1)
*/
    0x75, 0x01,                         /*       REPORT_SIZE (1)
*/
    0x95, 0x01,                         /*       REPORT_COUNT (1)
*/
    0x81, 0x02,                         /*       INPUT (Data,Var,Abs)
*/
    0x09, 0x32,                         /*       USAGE (In Range)
*/
    0x81, 0x02,                         /*       INPUT (Data,Var,Abs)
*/
    0x09, 0x47,                         /*       USAGE (Confidence)
*/
    0x81, 0x02,                         /*       INPUT (Data,Var,Abs)
*/
    0x95, 0x05,                         /*       REPORT_COUNT (5)
*/
    0x81, 0x03,                         /*       INPUT (Cnst,Ary,Abs)
*/
    0x09, 0x51,                         /*       USAGE (Contact Identifier)
*/
    0x75, 0x08,                         /*       REPORT_SIZE (8)
*/
    0x95, 0x01,                         /*       REPORT_COUNT (1)
*/
    0x81, 0x02,                         /*       INPUT (Data,Var,Abs)
*/
    0xa1, 0x00,                         /*       COLLECTION (Physical)
*/
    0x05, 0x01,                         /*         USAGE_PAGE (Generic
Desktop) */
    0x15, 0x00,                         /*         LOGICAL_MINIMUM (0)
*/
    0x26, 0x3A, 0x20,                   /*         LOGICAL_MAXIMUM (8200)
*/
    0x75, 0x10,                         /*         REPORT_SIZE (16)
*/
    0x09, 0x30,                         /*         USAGE (X)
*/
    0x81, 0x02,                         /*         INPUT (Data,Var,Abs)
*/
    0x15, 0x00,                         /*         LOGICAL_MINIMUM (0)
*/
    0x26, 0x5C, 0x12,                   /*         LOGICAL_MAXIMUM (4700)
*/
    0x09, 0x31,                         /*         USAGE (Y)
*/
    0x81, 0x02,                         /*         INPUT (Data,Var,Abs)
*/
    0x05, 0x0d,                         /*         USAGE_PAGE (Digitizers)
*/
    0x09, 0x30,                         /*         USAGE (X)
*/
    0x75, 0x10,                         /*         REPORT_SIZE (16)
*/
    0x95, 0x01,                         /*         REPORT_COUNT (1)
*/
    0x81, 0x02,                         /*         INPUT (Data,Var,Abs)
*/
    0xc0,                               /* END_COLLECTION
*/
    0xc0,                               /* END_COLLECTION

*/

    0x05, 0x0d,                         //   USAGE_PAGE (Digitizers)
    0x09, 0x54,                         //   USAGE (Actual count)
    0x15, 0x00,                         //   LOGICAL_MAXIMUM (0)
    0x25, 0x14,                         //   LOGICAL_MAXIMUM (20)
    0x95, 0x01,                         //   REPORT_COUNT (1)
    0x75, 0x08,                         //   REPORT_SIZE (8)
    0x81, 0x02,                         //   INPUT (Data,Var,Abs)
    0x85, REPORTID_MAX_COUNT,           //   REPORT_ID (Feature)
    0x09, 0x55,                         //   USAGE(Maximum Count)
    0x15, 0x00,                         //   LOGICAL_MINIMUM (0)
    0x25, 0x14,                         //   LOGICAL_MAXIMUM (20)
    0x95, 0x01,                         //   REPORT_COUNT (1)
    0x75, 0x08,                         //   REPORT_SIZE (8)
    0xb1, 0x02,                         //   FEATURE (Data,Var,Abs)
    0xc0,                               // END_COLLECTION
    #endif

    #if 1
    0x09, 0x00,                            // USAGE (Undefined)
    0xa1, 0x01,                         // COLLECTION (Application)
    0x85, REPORTID_ENABLE,              //   REPORT_ID (Feature)
    0x09, 0x00,                         //   USAGE(Undefined)
    0x95, 0x01,                         //   REPORT_COUNT (1)
    0x75, 0x08,                         //   REPORT_SIZE (8)
    0xb1, 0x02,                         //   FEATURE (Data,Var,Abs)
    0x85, REPORTID_GAIN,                //   REPORT_ID (Feature)
    0x09, 0x00,                         //   USAGE(Undefined)
    0x15, 0x00,                         //   LOGICAL_MINIMUM (0)
    0x25, 0x07,                         //   LOGICAL_MAXIMUM (7)
    0x95, 0x01,                         //   REPORT_COUNT (1)
    0x75, 0x08,                         //   REPORT_SIZE (8)
    0xb1, 0x02,                         //   FEATURE (Data,Var,Abs)
    0xc0,                               // END_COLLECTION
    #endif
};

With my best regards,

Nuno Santos
www.displax.com
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