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Windows/デバイスドライバ

Windows/デバイスドライバ/マルチタッチ

Top / Windows / デバイスドライバ / マルチタッチ

ドライバの提供方法

HIDデバイスの場合

• Windows 7でWindows Touchをサポートする場合、HIDデバイスならば、Windows 7標準のデバイスドライバが動くので、デバイスドライバを開発/提供しなくても良い。
• The report descriptor for a multiple input device must include at least one top-level collection for the primary device and a separate top-level collection for the mouse.

非HIDデバイスの場合

• デバイスがHIDをサポートしない場合、HIDをシミュレートするドライバを含めなければならない。
• ドライバを提供する場合、KMDFでLowerフィルタドライバを提供するのがオススメ。
  • Your driver should provide the same functionality as a HID minidriver, but register as a filter driver under a minimal WDM driver (also known as a shim driver). A shim driver is necessary because KMDF 1.9 does not natively support HID minidrivers. In Windows 7 and later versions of Windows, you can use the system-supplied Mshidkmdf.sys driver as a shim.
• The report descriptor for a multiple input device must include at least one top-level collection for the primary device and a separate top-level collection for the mouse.

どちらにせよ

• ドライバを提供する/しないにかかわらず、INFファイルでセレクティブサスペンドをサポートし無くてはならない

MSDN

• http://msdn.microsoft.com/en-us/library/windows/hardware/hh406720(v=vs.85).aspx

Windows 8

• Windows Pointer Device Data Delivery Protocol
  • https://msdn.microsoft.com/en-us/library/windows/hardware/dn672287.aspx

• Touch design and development in Windows 8 and Windows 8.1
  • http://msdn.microsoft.com/library/windows/hardware/dn383609.aspx

Windows 7

• Windows Touch Overview (Windows 7)
  • http://msdn.microsoft.com/en-us/library/ff553747(VS.85).aspx

• Supporting Usages in Multitouch Digitizer Drivers (Windows 7)
  • http://msdn.microsoft.com/en-us/library/ff553734(VS.85).aspx

• Selecting Packet Reporting Modes in Multitouch Drivers (Windows 7)
  • http://msdn.microsoft.com/en-us/library/ff553732(VS.85).aspx

ドキュメント

• How to Design and Test Multitouch Hardware Solutions for Windows 7
  • http://msdn.microsoft.com/en-us/library/windows/hardware/gg487461.aspx

• Multi-touch Driver Development
  • http://download.microsoft.com/download/5/e/6/5e66b27b-988b-4f50-af3a-c2ff1e62180f/mbl-t528_wh08.pptx

• Digitizer Drivers for Windows Touch and Pen-Based Computers
  • http://msdn.microsoft.com/en-us/windows/hardware/gg487437.aspx

メモ

ドライバフレームワーク

• KMDF:Elotouch Driverサンプル
• UMDF:HIDのミニポートドライバは書けない。
• WDM:新しいドライバ開発には推奨しない。

Windowsへの認識のさせ方

• Multi-touch devices are a superset of HID touch devices
• Use existing HID touch usages, but additionally report HID contact id and max number of supported contacts

レポートディスクリプタ

関連するUsage Page

• Usage Page/Generic Desktop (0x01)
• Usage Page/Digitizer (0x0D)

デバイスクラス

• Multitouch digitizers appear to the operating system as HID digitizers and not as a mouse or other proprietary device
• Windows Touch is not available to devices that are not identified as HID digitizers. As defined in the USB HID Usage Tables specification, this identification consists of the digitizer page (0x0D), along with usage ID 0x04 to specify the Collection Application for touch screens.

Required HID Usages

• Usage ID	Name	Description	Page
  0x30	X		0x01 Generic Desktop
  0x31	Y		0x01 Generic Desktop
  0x51	Contact identifier		0x0D Digitizer
  0x42	Tip switch	タッチしているかどうか	0x0D Digitizer
  0x32	In-range	距離	0x0D Digitizer
  0x55	Contact count maximum		0x0D Digitizer

Optional usages

• Confidence (0x0D, 0x47)　- 意図されたタッチかどうか
• Width and height(0x0D, 0x48 and 0x49)
• Pressure (page 0x0D, usage 0x30)

HID Additions to Support Multitouch

• The HID Usage Tables define the following usages for multitouch input from digitizers. Windows 7 supports these multitouch usages, and vendors should implement them in devices and drivers.

  Usage ID	Name	Description	Page	Type
  0x51	Contact identifier	Contact identifier	0x0D Digitizer	Dynamic Value (DV)
  0x0E	Configuration	Configuration	0x0D Digitizer	Collection Application (CA)
  0x52	Device mode	Input mode	0x0D Digitizer	DV
  0x23	Device settings	Device setting	0x0D Digitizer	Collection Logical (CL)
  0x53	Device identifier	Device index	0x0D Digitizer	DV
  0x54	Contact count	Actual contact count	0x0D Digitizer	DV
  0x55	Contact count maximum	Maximum number of contacts supported	0x0D Digitizer	DV

• http://msdn.microsoft.com/en-us/library/ff553734(VS.85).aspx

例

• The feature report must be in its own top-level collection and must include the multiple input configuration usages.

      0x09, 0x0E,                         // USAGE (Device Configuration)
      0xa1, 0x01,                         // COLLECTION (Application)
      0x85, REPORTID_FEATURE,             //   REPORT_ID (Configuration)
      0x09, 0x23,                         //   USAGE (Device Settings)
      0xa1, 0x02,                         //   COLLECTION (logical)    
      0x09, 0x52,                         //    USAGE (Device Mode)         
      0x09, 0x53,                         //    USAGE (Device Identifier)
      0x15, 0x00,                         //    LOGICAL_MINIMUM (0)      
      0x25, 0x0a,                         //    LOGICAL_MAXIMUM (10)
      0x75, 0x08,                         //    REPORT_SIZE (8)         
      0x95, 0x02,                         //    REPORT_COUNT (2)         
      0xb1, 0x02,                         //   FEATURE (Data,Var,Abs    
      0xc0,                               //   END_COLLECTION
      0xc0,                               // END_COLLECTION

Device Mode (0x52)

• 0x00 - Mouse (recommended default)
• 0x01 - Single-Input (Single touch or stylus)
• 0x02 - Multiple input
• http://msdn.microsoft.com/en-us/library/ff553734(VS.85).aspx

レポーティングモード

Serial mode

• Each packet contains a single contact update.

Parallel mode

• Each packet is “wide” enough to support reporting the maximum number of contacts that the device can detect.

Hybrid mode

• Each packet contains a fixed number of contacts (less than the total number that the device can detect), and multiple packets are sent to convey all the contact data.

デバイスモード

• Mouse (recommended default) 0x00
• Single-input (single touch or stylus) 0x01
• Multi-input 0x02

Windows Driver Kit/サンプル

Windows Touch Samples

HIDに対応してない場合のサンプル(シリアル接続なのをドライバでHIDに変換)。

• Elotouch Driver

関連

• デジタイザ
• Windows Touch API
• Touch Pack for Windows 7?
• マルチタッチ
• Windows 7/マルチタッチ

参考

• http://blogs.msdn.com/b/jpwdkblog/archive/2009/12/28/windows-touch.aspx
• http://touch-base.com/documentation/Windows 7 Touch Implementation.htm