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How to create a nRF8001 configuration for touch device with nRFgo

Quark

According to Microsoft's instruction on HID touch device, msdn.microsoft.com/.../dn672271(v=vs.85).aspx, a HID touch device should create a report (descriptor) as below,

0x05, 0x0d,                         // USAGE_PAGE (Digitizers)          
0x09, 0x04,                         // USAGE (Touch Screen)             
0xa1, 0x01,                         // COLLECTION (Application)         
0x85, 0x01,                        //   REPORT_ID (Touch)              
0x09, 0x22,                         //   USAGE (Finger)                 
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) 
0x95, 0x07,                         //       REPORT_COUNT (7)  
0x81, 0x03,                         //       INPUT (Cnst,Ary,Abs)
0x75, 0x08,                         //       REPORT_SIZE (8)
0x09, 0x51,                         //       USAGE (Contact Identifier)
0x95, 0x01,                         //       REPORT_COUNT (1)             
0x81, 0x02,                         //       INPUT (Data,Var,Abs) 
0x05, 0x01,                         //       USAGE_PAGE (Generic Desk..
0x26, 0xff, 0x0f,                   //       LOGICAL_MAXIMUM (4095)         
0x75, 0x10,                         //       REPORT_SIZE (16)             
0x55, 0x0e,                         //       UNIT_EXPONENT (-2)           
0x65, 0x13,                         //       UNIT(Inch,EngLinear)                  
0x09, 0x30,                         //       USAGE (X)                    
0x35, 0x00,                         //       PHYSICAL_MINIMUM (0)         
0x46, 0xb5, 0x04,                   //       PHYSICAL_MAXIMUM (1205)
0x95, 0x02,                         //       REPORT_COUNT (2)         
0x81, 0x02,                         //       INPUT (Data,Var,Abs)         
0x46, 0x8a, 0x03,                   //       PHYSICAL_MAXIMUM (906)
0x09, 0x31,                         //       USAGE (Y)                    
0x81, 0x02,                         //       INPUT (Data,Var,Abs)
0x05, 0x0d,                         //       USAGE_PAGE (Digitizers)
0x09, 0x48,                         //       USAGE (Width)                
0x09, 0x49,                         //       USAGE (Height)               
0x81, 0x02,                         //       INPUT (Data,Var,Abs)
0x95, 0x01,                         //       REPORT_COUNT (1)
0x55, 0x0C,                         //       UNIT_EXPONENT (-4)           
0x65, 0x12,                         //       UNIT (Radians,SIROtation)        
0x35, 0x00,                         //       PHYSICAL_MINIMUM (0)         
0x47, 0x6f, 0xf5, 0x00, 0x00,        //      PHYSICAL_MAXIMUM (62831)      
0x15, 0x00,                         //       LOGICAL_MINIMUM (0)      
0x27, 0x6f, 0xf5, 0x00, 0x00,       //       LOGICAL_MAXIMUM (62831)        
0x09, 0x3f,                         //       USAGE (Azimuth[Orientation]) 
0x81, 0x02,                         //       INPUT (Data,Var,Abs)  
0xc0,                               //    END_COLLECTION
0x09, 0x22,                         //   USAGE (Finger)                 
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) 
0x95, 0x07,                         //       REPORT_COUNT (7)  
0x81, 0x03,                         //       INPUT (Cnst,Ary,Abs)
0x75, 0x08,                         //       REPORT_SIZE (8)
0x09, 0x51,                         //       USAGE (Contact Identifier)
0x95, 0x01,                         //       REPORT_COUNT (1)             
0x81, 0x02,                         //       INPUT (Data,Var,Abs) 
0x05, 0x01,                         //       USAGE_PAGE (Generic Desk..
0x26, 0xff, 0x0f,                   //       LOGICAL_MAXIMUM (4095)         
0x75, 0x10,                         //       REPORT_SIZE (16)             
0x55, 0x0e,                         //       UNIT_EXPONENT (-2)           
0x65, 0x13,                         //       UNIT(Inch,EngLinear)                  
0x09, 0x30,                         //       USAGE (X)                    
0x35, 0x00,                         //       PHYSICAL_MINIMUM (0)         
0x46, 0xb5, 0x04,                   //       PHYSICAL_MAXIMUM (1205)
0x95, 0x02,                         //       REPORT_COUNT (2)         
0x81, 0x02,                         //       INPUT (Data,Var,Abs)         
0x46, 0x8a, 0x03,                   //       PHYSICAL_MAXIMUM (906)
0x09, 0x31,                         //       USAGE (Y)                    
0x81, 0x02,                         //       INPUT (Data,Var,Abs)
0x05, 0x0d,                         //       USAGE_PAGE (Digitizers)
0x09, 0x48,                         //       USAGE (Width)                
0x09, 0x49,                         //       USAGE (Height)               
0x81, 0x02,                         //       INPUT (Data,Var,Abs)
0x95, 0x01,                         //       REPORT_COUNT (1)
0x55, 0x0C,                         //       UNIT_EXPONENT (-4)           
0x65, 0x12,                         //       UNIT (Radians,SIROtation)        
0x35, 0x00,                         //       PHYSICAL_MINIMUM (0)         
0x47, 0x6f, 0xf5, 0x00, 0x00,        //      PHYSICAL_MAXIMUM (62831)      
0x15, 0x00,                         //       LOGICAL_MINIMUM (0)      
0x27, 0x6f, 0xf5, 0x00, 0x00,       //       LOGICAL_MAXIMUM (62831)        
0x09, 0x3f,                         //       USAGE (Azimuth[Orientation]) 
0x81, 0x02,                         //       INPUT (Data,Var,Abs)  
0xc0,                               //    END_COLLECTION
0x05, 0x0d,                         //    USAGE_PAGE (Digitizers)
0x55, 0x0C,                         //     UNIT_EXPONENT (-4)           
0x66, 0x01, 0x10,                   //     UNIT (Seconds)        
0x47, 0xff, 0xff, 0x00, 0x00,      //       PHYSICAL_MAXIMUM (65535)
0x27, 0xff, 0xff, 0x00, 0x00,         //   LOGICAL_MAXIMUM (65535) 
0x75, 0x10,                           //   REPORT_SIZE (16)             
0x95, 0x01,                           //   REPORT_COUNT (1) 
0x09, 0x56,                         //   USAGE (Scan Time)    
0x81, 0x02,                           //   INPUT (Data,Var,Abs)         
0x09, 0x54,                         //   USAGE (Contact count)
0x25, 0x7f,                           //   LOGICAL_MAXIMUM (127) 
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(Contact Count Maximum)
0x95, 0x01,                         //   REPORT_COUNT (1)
0x25, 0x02,                         //   LOGICAL_MAXIMUM (2)
0xb1, 0x02,                         //   FEATURE (Data,Var,Abs)
0x85, 0x44,                      //   REPORT_ID (Feature)
0x06, 0x00, 0xff,                   //   USAGE_PAGE (Vendor Defined)  
0x09, 0xC5,                         //   USAGE (Vendor Usage 0xC5)    
0x15, 0x00,                         //   LOGICAL_MINIMUM (0)          
0x26, 0xff, 0x00,                   //   LOGICAL_MAXIMUM (0xff) 
0x75, 0x08,                         //   REPORT_SIZE (8)             
0x96, 0x00,  0x01,                  //   REPORT_COUNT (0x100 (256))             
0xb1, 0x02,                         //   FEATURE (Data,Var,Abs) 
0xc0,                               // END_COLLECTIONÂ  Â Â

How can I create a nRF8001 configuration with nRFgo which meets the above requirements? I tried days but still could not get it right. Please help! Thanks!

Parents
  • 0 in reply to Hung Bui

    Further to this question, in hid_keyboard_template, the HID_Report data size is set to 8 bytes, however, if I count the total bytes in the descriptor it should be 11 bytes, so it means the last 3 bytes is not used? And please kindly help me to understand how to interpret the data format in the report (as in below example). Is the data segmented by Usage Page? (Please see my notes in the example) If my understanding was wrong, please kindly correct me. Thank you very much!

    0xA1, 0x01,                         // Collection (Application)
0x05, 0x07,                         //     Usage Page (Key Codes)  <== first data starts here?
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) reserved byte(1)

0x95, 0x05,                         //     Report Count (5)
0x75, 0x01,                         //     Report Size (1)    <== first data ends here? what are the 5 bits means?
0x05, 0x08,                         //     Usage Page (Page# for LEDs) <== second data starts here?
0x19, 0x01,                         //     Usage Minimum (1)
0x29, 0x05,                         //     Usage Maximum (5)
0x91, 0x02,                         //     Output (Data, Variable, Absolute), Led report
0x95, 0x01,                         //     Report Count (1)
0x75, 0x03,                         //     Report Size (3)
0x91, 0x01,                         //     Output (Data, Variable, Absolute), Led report padding
Reply
  • 0 in reply to Hung Bui

    Further to this question, in hid_keyboard_template, the HID_Report data size is set to 8 bytes, however, if I count the total bytes in the descriptor it should be 11 bytes, so it means the last 3 bytes is not used? And please kindly help me to understand how to interpret the data format in the report (as in below example). Is the data segmented by Usage Page? (Please see my notes in the example) If my understanding was wrong, please kindly correct me. Thank you very much!

    0xA1, 0x01,                         // Collection (Application)
0x05, 0x07,                         //     Usage Page (Key Codes)  <== first data starts here?
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) reserved byte(1)

0x95, 0x05,                         //     Report Count (5)
0x75, 0x01,                         //     Report Size (1)    <== first data ends here? what are the 5 bits means?
0x05, 0x08,                         //     Usage Page (Page# for LEDs) <== second data starts here?
0x19, 0x01,                         //     Usage Minimum (1)
0x29, 0x05,                         //     Usage Maximum (5)
0x91, 0x02,                         //     Output (Data, Variable, Absolute), Led report
0x95, 0x01,                         //     Report Count (1)
0x75, 0x03,                         //     Report Size (3)
0x91, 0x01,                         //     Output (Data, Variable, Absolute), Led report padding
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