Why these two descriptors, one is working, the other is not.
Posted: Thu Nov 15, 2007 1:56 pm
the working one:
the non-working one:
who can tell me why? Thank you!
the following descriptor worked once, but didn't work now
Code: Select all
char usbHidReportDescriptor[25] = {//OK//ok
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x15, 0x00, //Logical_Minimum (0)
0x09, 0x04, // USAGE (Joystick)
0xa1, 0x01, // COLLECTION (Application)
0x05, 0x02, // USAGE_PAGE (Simulation Controls)
0x09, 0xc5, // USAGE (Rudder)
0x09, 0xbb, // USAGE (Brake)
0x15, 0x81, // LOGICAL_MINIMUM (-127)
0x25, 0x7f, // LOGICAL_MAXIMUM (127)
0x75, 0x08, // REPORT_SIZE (8)
0x95, 0x02, // REPORT_COUNT (2)
0x81, 0x02, // INPUT (Data,Var,Abs)
0xc0 // END_COLLECTION
};
the non-working one:
Code: Select all
char usbHidReportDescriptor[30] = {
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x15, 0x00, //Logical_Minimum (0)
0x09, 0x04, // USAGE (Joystick)
0xa1, 0x01, // COLLECTION (Application)
0x05, 0x02, // USAGE_PAGE (Simulation Controls)
0x09, 0xc5, // USAGE (Rudder)
0x09, 0xbb, // USAGE (Brake)
0x15, 0x81, // LOGICAL_MINIMUM (-127)
0x25, 0x7f, // LOGICAL_MAXIMUM (127)
0x35, 0x00, // PHYSICAL_MINIMUM (0)
0x46, 0xff, 0x00, // PHYSICAL_MAXIMUM (255)
0x75, 0x08, // REPORT_SIZE (8)
0x95, 0x02, // REPORT_COUNT (2)
0x81, 0x02, // INPUT (Data,Var,Abs)
0xc0 // END_COLLECTION
};
who can tell me why? Thank you!
the following descriptor worked once, but didn't work now
Code: Select all
char usbHidReportDescriptor[28]= {//OK
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x09, 0x04, // USAGE (Joystick)
0xa1, 0x01, // COLLECTION (Application)
0x09, 0x01, // USAGE (Pointer)
0xa1, 0x00, // COLLECTION (Physical)
0x09, 0x30, // USAGE (X)
0x09, 0x31, // USAGE (Z)
0x15, 0x81, // LOGICAL_MINIMUM (-127)
0x25, 0x7f, // LOGICAL_MAXIMUM (127)
0x75, 0x08, // report size(8)
0x95, 0x02, // REPORT_COUNT (2)
0x81, 0x02, // INPUT (Data,Var,Abs)
0xc0, // END_COLLECTION
0xc0 // END_COLLECTION
};