mcuee
commented
1 year ago USB HID Device : Microchip PICKit 4
It seems to me the WIndows reconstruction is correct (logically equivalent). So this may not be a real issue. Just want to double check here. Input report size --> 64 Bytes Output report size --> 64 Bytes Feature report size --> 4 Bytes
hidtest output under Linux.
Device Found
type: 03eb 2177
path: /dev/hidraw4
serial_number: BUR200973052
Manufacturer: Microchip Technology Incorporated
Product: MPLAB PICkit 4 CMSIS-DAP
Release: 100
Interface: 0
Usage (page): 0x1 (0xff00)
Bus type: 1 (USB)
Report Descriptor: (35 bytes)
0x06, 0x00, 0xff, 0x09, 0x01, 0xa1, 0x01, 0x15, 0x00, 0x26,
0xff, 0x00, 0x75, 0x08, 0x96, 0x40, 0x00, 0x09, 0x01, 0x81,
0x02, 0x96, 0x40, 0x00, 0x09, 0x01, 0x91, 0x02, 0x95, 0x04,
0x09, 0x01, 0xb1, 0x02, 0xc0,Feed the above through an online HID report parser https://eleccelerator.com/usbdescreqparser/
0x06, 0x00, 0xFF, // Usage Page (Vendor Defined 0xFF00)
0x09, 0x01, // Usage (0x01)
0xA1, 0x01, // Collection (Application)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x96, 0x40, 0x00, // Report Count (64)
0x09, 0x01, // Usage (0x01)
0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x96, 0x40, 0x00, // Report Count (64)
0x09, 0x01, // Usage (0x01)
0x91, 0x02, // Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0x95, 0x04, // Report Count (4)
0x09, 0x01, // Usage (0x01)
0xB1, 0x02, // Feature (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0xC0, // End Collection
// 35 byteshidtest output under Windows.
Device Found
type: 03eb 2177
path: \\?\HID#VID_03EB&PID_2177&MI_00#8&36594c76&0&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}
serial_number: BUR200973052
Manufacturer: Microchip Technology Incorporated
Product: MPLAB PICkit 4 CMSIS-DAP
Release: 100
Interface: 0
Usage (page): 0x1 (0xff00)
Bus type: 1 (USB)
Report Descriptor: (47 bytes)
0x06, 0x00, 0xff, 0x09, 0x01, 0xa1, 0x01, 0x09, 0x01, 0x15,
0x00, 0x26, 0xff, 0x00, 0x75, 0x08, 0x95, 0x40, 0x81, 0x02,
0x09, 0x01, 0x15, 0x00, 0x26, 0xff, 0x00, 0x75, 0x08, 0x95,
0x40, 0x91, 0x02, 0x09, 0x01, 0x15, 0x00, 0x26, 0xff, 0x00,
0x75, 0x08, 0x95, 0x04, 0xb1, 0x02, 0xc0,Feed the above through an online HID report parser https://eleccelerator.com/usbdescreqparser/
0x06, 0x00, 0xFF, // Usage Page (Vendor Defined 0xFF00)
0x09, 0x01, // Usage (0x01)
0xA1, 0x01, // Collection (Application)
0x09, 0x01, // Usage (0x01)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x40, // Report Count (64)
0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x09, 0x01, // Usage (0x01)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x40, // Report Count (64)
0x91, 0x02, // Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0x09, 0x01, // Usage (0x01)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x04, // Report Count (4)
0xB1, 0x02, // Feature (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0xC0, // End Collection
// 47 bytes
249 has been closed with the merge of PR #451 into git master.
249
451
However, we know the Windows implementation (which is a great job done by @JoergAtGithub) is a best effort impelmentation because of the limitation of Windows HID driver. This means that there may be potential issues.
Using this thread to discuss potential issues with some HID devices.