Support for touchscreens with additional reports in HID descriptor

[jackhumbert]

Support for touchscreens with additional reports in HID descriptor

[rsta2]

Thank you! I found this tool: http://eleccelerator.com/usbdescreqparser/ Let me analyze this.

[rsta2]

Diving into a HID parser (again) is always a bit tricky and will need some time. Can you please send the HID report descriptor as a hex-dump, so that I can use my own tool for decoding it. Thank you, also for appreciating Circle!

[jackhumbert]

Gotcha! Here's the hex dump of the descriptor:

05 0D 09 04 A1 01 85 01 09 22 A1 02 05 0D 95 01
75 06 09 51 15 00 25 3F 81 02 09 42 25 01 75 01
95 01 81 02 75 01 95 01 81 03 05 01 75 10 55 0E
65 11 09 30 26 00 10 35 00 46 9B 14 81 42 09 31
26 00 10 46 9A 0B 81 42 C0 05 0D 09 22 A1 02 05
0D 95 01 75 06 09 51 15 00 25 3F 81 02 09 42 25
01 75 01 95 01 81 02 75 01 95 01 81 03 05 01 75
10 55 0E 65 11 09 30 26 00 10 35 00 46 9B 14 81
42 09 31 26 00 10 46 9A 0B 81 42 C0 05 0D 09 22
A1 02 05 0D 95 01 75 06 09 51 15 00 25 3F 81 02
09 42 25 01 75 01 95 01 81 02 75 01 95 01 81 03
05 01 75 10 55 0E 65 11 09 30 26 00 10 35 00 46
9B 14 81 42 09 31 26 00 10 46 9A 0B 81 42 C0 05
0D 09 22 A1 02 05 0D 95 01 75 06 09 51 15 00 25
3F 81 02 09 42 25 01 75 01 95 01 81 02 75 01 95
01 81 03 05 01 75 10 55 0E 65 11 09 30 26 00 10
35 00 46 9B 14 81 42 09 31 26 00 10 46 9A 0B 81
42 C0 05 0D 09 22 A1 02 05 0D 95 01 75 06 09 51
15 00 25 3F 81 02 09 42 25 01 75 01 95 01 81 02
75 01 95 01 81 03 05 01 75 10 55 0E 65 11 09 30
26 00 10 35 00 46 9B 14 81 42 09 31 26 00 10 46
9A 0B 81 42 C0 05 0D 09 22 A1 02 05 0D 95 01 75
06 09 51 15 00 25 3F 81 02 09 42 25 01 75 01 95
01 81 02 75 01 95 01 81 03 05 01 75 10 55 0E 65
11 09 30 26 00 10 35 00 46 9B 14 81 42 09 31 26
00 10 46 9A 0B 81 42 C0 05 0D 09 22 A1 02 05 0D
95 01 75 06 09 51 15 00 25 3F 81 02 09 42 25 01
75 01 95 01 81 02 75 01 95 01 81 03 05 01 75 10
55 0E 65 11 09 30 26 00 10 35 00 46 9B 14 81 42
09 31 26 00 10 46 9A 0B 81 42 C0 05 0D 09 22 A1
02 05 0D 95 01 75 06 09 51 15 00 25 3F 81 02 09
42 25 01 75 01 95 01 81 02 75 01 95 01 81 03 05
01 75 10 55 0E 65 11 09 30 26 00 10 35 00 46 9B
14 81 42 09 31 26 00 10 46 9A 0B 81 42 C0 05 0D
09 22 A1 02 05 0D 95 01 75 06 09 51 15 00 25 3F
81 02 09 42 25 01 75 01 95 01 81 02 75 01 95 01
81 03 05 01 75 10 55 0E 65 11 09 30 26 00 10 35
00 46 9B 14 81 42 09 31 26 00 10 46 9A 0B 81 42
C0 05 0D 09 22 A1 02 05 0D 95 01 75 06 09 51 15
00 25 3F 81 02 09 42 25 01 75 01 95 01 81 02 75
01 95 01 81 03 05 01 75 10 55 0E 65 11 09 30 26
00 10 35 00 46 9B 14 81 42 09 31 26 00 10 46 9A
0B 81 42 C0 05 0D 09 56 55 00 65 00 27 FF FF FF
7F 95 01 75 20 81 02 09 54 25 7F 95 01 75 08 81
02 85 02 09 55 25 0A B1 02 06 00 FF 09 C5 85 03
15 00 26 FF 00 75 08 96 00 01 B1 02 C0 06 00 FF
09 01 A1 01 85 09 09 01 15 00 26 FF 00 95 3F 75
08 81 02 09 01 15 00 26 FF 00 95 04 75 08 91 02
C0

What tool do you use for decoding?

[rsta2]

There is an update on the develop branch, only slightly different from the one, you have suggested. It only considers the first found Report ID and ignores all others. The touchscreen driver was only able to handle one Report ID already, but did not ignore the other ones. Can you please test this again with your touchscreen. Thank you!

[jackhumbert]

Just tested it out - that works perfectly. Thanks!

[rsta2]

You are welcome, and thanks for the comprehensive report!

[rsta2]

This modification is in Circle 46.