16位HID Gamepad报告描述符在android中的分辨率类似于8位描述符

Question

我正在为我的项目使用MEMS传感器。我正在研究16位HID游戏手柄报告描述符，它有8个按钮和4个轴(数据来自MEMS传感器)。

首先，我使用了8位HID Gamepad报告描述符，并通过BLE发送数据。它已经与windows和安卓HTML5游戏手柄测试仪(http://html5gamepad.com/)进行了检查，这两个操作系统都给出了游戏手柄测试仪中的预期数据。为了更好地解决问题，我更改了报告描述符，并制作了2个字节的HID描述符，附在下面。此报告描述符在windows中给出了预期的数据和分辨率，但在android端没有得到相同的输出。

输出：

Windows 16位数据分辨率: 0.147723、0.148028、0.149737、0.150103、0.152056、0.154070、0.154957、0.156087、0.156146

Android 16位数据分辨率: 0.144566、0.153294、0.165441、0.170080、0.183691、0.191595、0.199957

在这里，我附上了html5游戏面板测试器的屏幕截图(铬)。enter image description here

结果表明，我从传感器发送的四元数数据在初始状态下给出了4个轴值(X，Y，Z，W)，即(0，0，0，1)。因此，在gamepad测试仪中，数据在-1到1的范围内。在16位中，我使用逻辑最小值：-32767到逻辑最大值: 32767

所以我怀疑android端对HID报告描述符有什么限制吗？

enter image description here

0x05, 0x01, //USAGE_PAGE (Generic Desktop) 0x09, 0x05, //USAGE (Game Pad) 0xa1, 0x01, //COLLECTION (APPLICATION) 0xa1, 0x00, // COLLECTION (Physical) 0x05, 0x09, //USAGE_PAGE (Button) 0x19, 0x01, //USAGE_MINIMUM (Button1) 0x29, 0x08, //USAGE_MAXIMUM (Button 8) 0x15, 0x00, //LOGICAL_MINIMUM (0) 0x25, 0x01, //LOGICAL_MAXIMUM(1) 0x95, 0x08, //REPORT_COUNT (8) 0x75, 0x01, //REPORT_SIZE (1) 0x81, 0x02, //INPUT(Data, Var, Abs) 0x05, 0x01, //USAGE_PAGE (Generic Desktop) 0x09, 0x30, //USAGE (X) 0x09, 0x31, //USAGE (Y) 0x09, 0x32, //USAGE (Z) 0x09, 0x35, //USAGE (Rz) 0x16, 0x01, 0x80 //LOGICAL_MINIMUM(-32767) 0x26, 0xff, 0x7f //LOGICAL_MAXIMUM(32767) 0x75, 0x10, //REPORT_SIZE(16) 0x95, 0x04, //REPORT_COUNT(4) 0x81, 0x02, //INPUT(Data,Var,Abs) 0xc0, //END_Collection 0xc0 //END_Collection

我希望有人能帮助解决这个问题。

谢谢,

达维娅。

Answer 1

我认为您可能意外地更新了注释，而不是实际的报告描述符字节。当我解码你的描述符时，我得到：

//--------------------------------------------------------------------------------
// Decoded Application Collection
//--------------------------------------------------------------------------------

/*
05 01        (GLOBAL) USAGE_PAGE         0x0001 Generic Desktop Page 
09 05        (LOCAL)  USAGE              0x00010005 Game Pad (Application Collection)  
A1 01        (MAIN)   COLLECTION         0x01 Application (Usage=0x00010005: Page=Generic Desktop Page, Usage=Game Pad, Type=Application Collection)
A1 00          (MAIN)   COLLECTION         0x00 Physical (Usage=0x0: Page=, Usage=, Type=) <-- Error: COLLECTION must be preceded by a USAGE <-- Warning: USAGE type should be CP (Physical Collection)
05 09            (GLOBAL) USAGE_PAGE         0x0009 Button Page 
19 01            (LOCAL)  USAGE_MINIMUM      0x00090001 Button 1 Primary/trigger (Selector, On/Off Control, Momentary Control, or One Shot Control)  
29 10            (LOCAL)  USAGE_MAXIMUM      0x00090010 Button 16 (Selector, On/Off Control, Momentary Control, or One Shot Control)  
15 00            (GLOBAL) LOGICAL_MINIMUM    0x00 (0)  <-- Info: Consider replacing 15 00 with 14
25 01            (GLOBAL) LOGICAL_MAXIMUM    0x01 (1)  
95 10            (GLOBAL) REPORT_COUNT       0x10 (16) Number of fields  
75 01            (GLOBAL) REPORT_SIZE        0x01 (1) Number of bits per field  
81 02            (MAIN)   INPUT              0x00000002 (16 fields x 1 bit) 0=Data 1=Variable 0=Absolute 0=NoWrap 0=Linear 0=PrefState 0=NoNull 0=NonVolatile 0=Bitmap 
05 01            (GLOBAL) USAGE_PAGE         0x0001 Generic Desktop Page 
09 30            (LOCAL)  USAGE              0x00010030 X (Dynamic Value)  
09 31            (LOCAL)  USAGE              0x00010031 Y (Dynamic Value)  
09 32            (LOCAL)  USAGE              0x00010032 Z (Dynamic Value)  
09 33            (LOCAL)  USAGE              0x00010033 Rx (Dynamic Value)  
15 81            (GLOBAL) LOGICAL_MINIMUM    0x81 (-127)  
25 7F            (GLOBAL) LOGICAL_MAXIMUM    0x7F (127)  
75 08            (GLOBAL) REPORT_SIZE        0x08 (8) Number of bits per field  
95 04            (GLOBAL) REPORT_COUNT       0x04 (4) Number of fields  
81 02            (MAIN)   INPUT              0x00000002 (4 fields x 8 bits) 0=Data 1=Variable 0=Absolute 0=NoWrap 0=Linear 0=PrefState 0=NoNull 0=NonVolatile 0=Bitmap 
C0             (MAIN)   END_COLLECTION     Physical 
C0           (MAIN)   END_COLLECTION     Application 
*/

//--------------------------------------------------------------------------------
// Button Page inputReport (Device --> Host)
//--------------------------------------------------------------------------------

typedef struct
{
                                                     // No REPORT ID byte
                                                     // Collection: GamePad
  uint8_t  BTN_GamePadButton1 : 1;                   // Usage 0x00090001: Button 1 Primary/trigger, Value = 0 to 1
  uint8_t  BTN_GamePadButton2 : 1;                   // Usage 0x00090002: Button 2 Secondary, Value = 0 to 1
  uint8_t  BTN_GamePadButton3 : 1;                   // Usage 0x00090003: Button 3 Tertiary, Value = 0 to 1
  uint8_t  BTN_GamePadButton4 : 1;                   // Usage 0x00090004: Button 4, Value = 0 to 1
  uint8_t  BTN_GamePadButton5 : 1;                   // Usage 0x00090005: Button 5, Value = 0 to 1
  uint8_t  BTN_GamePadButton6 : 1;                   // Usage 0x00090006: Button 6, Value = 0 to 1
  uint8_t  BTN_GamePadButton7 : 1;                   // Usage 0x00090007: Button 7, Value = 0 to 1
  uint8_t  BTN_GamePadButton8 : 1;                   // Usage 0x00090008: Button 8, Value = 0 to 1
  uint8_t  BTN_GamePadButton9 : 1;                   // Usage 0x00090009: Button 9, Value = 0 to 1
  uint8_t  BTN_GamePadButton10 : 1;                  // Usage 0x0009000A: Button 10, Value = 0 to 1
  uint8_t  BTN_GamePadButton11 : 1;                  // Usage 0x0009000B: Button 11, Value = 0 to 1
  uint8_t  BTN_GamePadButton12 : 1;                  // Usage 0x0009000C: Button 12, Value = 0 to 1
  uint8_t  BTN_GamePadButton13 : 1;                  // Usage 0x0009000D: Button 13, Value = 0 to 1
  uint8_t  BTN_GamePadButton14 : 1;                  // Usage 0x0009000E: Button 14, Value = 0 to 1
  uint8_t  BTN_GamePadButton15 : 1;                  // Usage 0x0009000F: Button 15, Value = 0 to 1
  uint8_t  BTN_GamePadButton16 : 1;                  // Usage 0x00090010: Button 16, Value = 0 to 1
  int8_t   GD_GamePadX;                              // Usage 0x00010030: X, Value = -127 to 127
  int8_t   GD_GamePadY;                              // Usage 0x00010031: Y, Value = -127 to 127
  int8_t   GD_GamePadZ;                              // Usage 0x00010032: Z, Value = -127 to 127
  int8_t   GD_GamePadRx;                             // Usage 0x00010033: Rx, Value = -127 to 127
} inputReport_t;

试着使用下面的代码：

    //--------------------------------------------------------------------------------
// Decoded Application Collection
//--------------------------------------------------------------------------------

/*
05 01        (GLOBAL) USAGE_PAGE         0x0001 Generic Desktop Page 
09 05        (LOCAL)  USAGE              0x00010005 Game Pad (Application Collection)  
A1 01        (MAIN)   COLLECTION         0x01 Application (Usage=0x00010005: Page=Generic Desktop Page, Usage=Game Pad, Type=Application Collection)
09 01          (LOCAL)  USAGE              0x00010001 Pointer (Physical Collection)  
A1 00          (MAIN)   COLLECTION         0x00 Physical (Usage=0x00010001: Page=Generic Desktop Page, Usage=Pointer, Type=Physical Collection)
05 09            (GLOBAL) USAGE_PAGE         0x0009 Button Page 
19 01            (LOCAL)  USAGE_MINIMUM      0x00090001 Button 1 Primary/trigger (Selector, On/Off Control, Momentary Control, or One Shot Control)  
29 08            (LOCAL)  USAGE_MAXIMUM      0x00090008 Button 8 (Selector, On/Off Control, Momentary Control, or One Shot Control)  
15 00            (GLOBAL) LOGICAL_MINIMUM    0x00 (0)  <-- Info: Consider replacing 15 00 with 14
25 01            (GLOBAL) LOGICAL_MAXIMUM    0x01 (1)  
95 08            (GLOBAL) REPORT_COUNT       0x08 (8) Number of fields  
75 01            (GLOBAL) REPORT_SIZE        0x01 (1) Number of bits per field  
81 02            (MAIN)   INPUT              0x00000002 (8 fields x 1 bit) 0=Data 1=Variable 0=Absolute 0=NoWrap 0=Linear 0=PrefState 0=NoNull 0=NonVolatile 0=Bitmap 
05 01            (GLOBAL) USAGE_PAGE         0x0001 Generic Desktop Page 
09 30            (LOCAL)  USAGE              0x00010030 X (Dynamic Value)  
09 31            (LOCAL)  USAGE              0x00010031 Y (Dynamic Value)  
09 32            (LOCAL)  USAGE              0x00010032 Z (Dynamic Value)  
09 33            (LOCAL)  USAGE              0x00010033 Rx (Dynamic Value)  
16 0180          (GLOBAL) LOGICAL_MINIMUM    0x8001 (-32767)  
26 FF7F          (GLOBAL) LOGICAL_MAXIMUM    0x7FFF (32767)  
75 10            (GLOBAL) REPORT_SIZE        0x10 (16) Number of bits per field  
95 04            (GLOBAL) REPORT_COUNT       0x04 (4) Number of fields  
81 02            (MAIN)   INPUT              0x00000002 (4 fields x 16 bits) 0=Data 1=Variable 0=Absolute 0=NoWrap 0=Linear 0=PrefState 0=NoNull 0=NonVolatile 0=Bitmap 
C0             (MAIN)   END_COLLECTION     Physical 
C0           (MAIN)   END_COLLECTION     Application 
*/

//--------------------------------------------------------------------------------
// Button Page inputReport (Device --> Host)
//--------------------------------------------------------------------------------

typedef struct
{
                                                     // No REPORT ID byte
                                                     // Collection: GamePad Pointer
  uint8_t  BTN_GamePadPointerButton1 : 1;            // Usage 0x00090001: Button 1 Primary/trigger, Value = 0 to 1
  uint8_t  BTN_GamePadPointerButton2 : 1;            // Usage 0x00090002: Button 2 Secondary, Value = 0 to 1
  uint8_t  BTN_GamePadPointerButton3 : 1;            // Usage 0x00090003: Button 3 Tertiary, Value = 0 to 1
  uint8_t  BTN_GamePadPointerButton4 : 1;            // Usage 0x00090004: Button 4, Value = 0 to 1
  uint8_t  BTN_GamePadPointerButton5 : 1;            // Usage 0x00090005: Button 5, Value = 0 to 1
  uint8_t  BTN_GamePadPointerButton6 : 1;            // Usage 0x00090006: Button 6, Value = 0 to 1
  uint8_t  BTN_GamePadPointerButton7 : 1;            // Usage 0x00090007: Button 7, Value = 0 to 1
  uint8_t  BTN_GamePadPointerButton8 : 1;            // Usage 0x00090008: Button 8, Value = 0 to 1
  int16_t  GD_GamePadPointerX;                       // Usage 0x00010030: X, Value = -32767 to 32767
  int16_t  GD_GamePadPointerY;                       // Usage 0x00010031: Y, Value = -32767 to 32767
  int16_t  GD_GamePadPointerZ;                       // Usage 0x00010032: Z, Value = -32767 to 32767
  int16_t  GD_GamePadPointerRx;                      // Usage 0x00010033: Rx, Value = -32767 to 32767
} inputReport_t;

编辑:我将按钮数量从16个减少到8个，以符合你对控制器的描述