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Potential issues with NetBSD uhid backend #797

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opened 2026-04-25 23:27:56 -05:00 by mcuee · 8 comments
mcuee commented 2026-04-25 23:27:56 -05:00 (Migrated from github.com)

From the testing results here NetBSD uhid example does not work for me with the FX2HID example even if I force it to full speed USB mode.

From the testing results here NetBSD uhid example does not work for me with the FX2HID example even if I force it to full speed USB mode. * https://github.com/libusb/hidapi/pull/780
mcuee commented 2026-04-25 23:28:59 -05:00 (Migrated from github.com)
  1. Bulding hidapi under NetBSD with the uhid backend is okay
netbsdvm$ cmake .. -D HIDAPI_BUILD_HIDTEST=1  -D CMAKE_C_FLAGS=-I/usr/pkg/include -D CMAKE_EXE_LINKER_FLAGS=-R/usr/pkg/lib -DCMAKE_INSTALL_PREFIX=/usr/pkg
-- The C compiler identification is GNU 10.5.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- hidapi: v0.16.0
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Performing Test HIDAPI_ICONV_CONST
-- Performing Test HIDAPI_ICONV_CONST - Failed
-- Found PkgConfig: /usr/pkg/bin/pkg-config (found version "2.4.3")
-- Checking for module 'libusb-1.0>=1.0.9'
--   Found libusb-1.0, version 1.0.29
-- Check for Iconv
-- Performing Test Iconv_IS_BUILT_IN
-- Performing Test Iconv_IS_BUILT_IN - Success
-- Found Iconv: built in to C library
-- Building hidtest
-- Configuring done (5.3s)
-- Generating done (0.3s)
-- Build files have been written to: /home/mcuee/build/hidapi/build_cmake
netbsdvm$ make
[ 16%] Building C object src/netbsd/CMakeFiles/hidapi_netbsd.dir/hid.c.o
[ 33%] Linking C shared library libhidapi-netbsd.so
[ 33%] Built target hidapi_netbsd
[ 50%] Building C object src/libusb/CMakeFiles/hidapi_libusb.dir/hid.c.o
[ 66%] Linking C shared library libhidapi-libusb.so
[ 66%] Built target hidapi_libusb
[ 83%] Building C object hidtest/CMakeFiles/hidtest.dir/test.c.o
[100%] Linking C executable hidtest
[100%] Built target hidtest
netbsdvm$ sudo make install
Password:
[ 33%] Built target hidapi_netbsd
[ 66%] Built target hidapi_libusb
[100%] Built target hidtest
Install the project...
-- Install configuration: "Release"
-- Installing: /usr/pkg/lib/libhidapi-netbsd.so.0.16.0
-- Up-to-date: /usr/pkg/lib/libhidapi-netbsd.so.0
-- Up-to-date: /usr/pkg/lib/libhidapi-netbsd.so
-- Up-to-date: /usr/pkg/include/hidapi/hidapi.h
-- Installing: /usr/pkg/lib/pkgconfig/hidapi-netbsd.pc
-- Installing: /usr/pkg/lib/libhidapi-libusb.so.0.16.0
-- Up-to-date: /usr/pkg/lib/libhidapi-libusb.so.0
-- Set non-toolchain portion of runtime path of "/usr/pkg/lib/libhidapi-libusb.so.0.16.0" to ""
-- Up-to-date: /usr/pkg/lib/libhidapi-libusb.so
-- Up-to-date: /usr/pkg/include/hidapi/hidapi.h
-- Up-to-date: /usr/pkg/include/hidapi/hidapi_libusb.h
-- Installing: /usr/pkg/lib/pkgconfig/hidapi-libusb.pc
-- Installing: /usr/pkg/lib/cmake/hidapi/libhidapi.cmake
-- Installing: /usr/pkg/lib/cmake/hidapi/libhidapi-release.cmake
-- Installing: /usr/pkg/lib/cmake/hidapi/hidapi-config-version.cmake
-- Installing: /usr/pkg/lib/cmake/hidapi/hidapi-config.cmake
-- Installing: /usr/pkg/bin/hidtest
-- Set non-toolchain portion of runtime path of "/usr/pkg/bin/hidtest" to ""

netbsdvm$ sudo /usr/pkg/bin/hidtest
hidapi test/example tool. Compiled with hidapi version 0.16.0, runtime version 0.16.0.
Compile-time version matches runtime version of hidapi.

Device Found
  type: 0925 1234
  path: uhidev1
  serial_number:
  Manufacturer: CYPRESS
  Product:      EZ-USB FX2 HID USBHIDIO
  Release:      0
  Interface:    -1
  Usage (page): 0x1 (0xffa0)
  Bus type: 1 (USB)

  Report Descriptor: (52 bytes)
0x06, 0xa0, 0xff, 0x09, 0x01, 0xa1, 0x01, 0x09, 0x02, 0xa1,
0x00, 0x06, 0xa1, 0xff, 0x09, 0x03, 0x09, 0x04, 0x15, 0x80,
0x25, 0x7f, 0x35, 0x00, 0x45, 0xff, 0x75, 0x08, 0x95, 0x80,
0x81, 0x02, 0x09, 0x05, 0x09, 0x06, 0x15, 0x80, 0x25, 0x7f,
0x35, 0x00, 0x45, 0xff, 0x75, 0x08, 0x95, 0x80, 0x91, 0x02,
0xc0, 0xc0,
unable to open device
1) Bulding hidapi under NetBSD with the uhid backend is okay ``` netbsdvm$ cmake .. -D HIDAPI_BUILD_HIDTEST=1 -D CMAKE_C_FLAGS=-I/usr/pkg/include -D CMAKE_EXE_LINKER_FLAGS=-R/usr/pkg/lib -DCMAKE_INSTALL_PREFIX=/usr/pkg -- The C compiler identification is GNU 10.5.0 -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working C compiler: /usr/bin/cc - skipped -- Detecting C compile features -- Detecting C compile features - done -- hidapi: v0.16.0 -- Performing Test CMAKE_HAVE_LIBC_PTHREAD -- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed -- Looking for pthread_create in pthreads -- Looking for pthread_create in pthreads - not found -- Looking for pthread_create in pthread -- Looking for pthread_create in pthread - found -- Found Threads: TRUE -- Performing Test HIDAPI_ICONV_CONST -- Performing Test HIDAPI_ICONV_CONST - Failed -- Found PkgConfig: /usr/pkg/bin/pkg-config (found version "2.4.3") -- Checking for module 'libusb-1.0>=1.0.9' -- Found libusb-1.0, version 1.0.29 -- Check for Iconv -- Performing Test Iconv_IS_BUILT_IN -- Performing Test Iconv_IS_BUILT_IN - Success -- Found Iconv: built in to C library -- Building hidtest -- Configuring done (5.3s) -- Generating done (0.3s) -- Build files have been written to: /home/mcuee/build/hidapi/build_cmake netbsdvm$ make [ 16%] Building C object src/netbsd/CMakeFiles/hidapi_netbsd.dir/hid.c.o [ 33%] Linking C shared library libhidapi-netbsd.so [ 33%] Built target hidapi_netbsd [ 50%] Building C object src/libusb/CMakeFiles/hidapi_libusb.dir/hid.c.o [ 66%] Linking C shared library libhidapi-libusb.so [ 66%] Built target hidapi_libusb [ 83%] Building C object hidtest/CMakeFiles/hidtest.dir/test.c.o [100%] Linking C executable hidtest [100%] Built target hidtest netbsdvm$ sudo make install Password: [ 33%] Built target hidapi_netbsd [ 66%] Built target hidapi_libusb [100%] Built target hidtest Install the project... -- Install configuration: "Release" -- Installing: /usr/pkg/lib/libhidapi-netbsd.so.0.16.0 -- Up-to-date: /usr/pkg/lib/libhidapi-netbsd.so.0 -- Up-to-date: /usr/pkg/lib/libhidapi-netbsd.so -- Up-to-date: /usr/pkg/include/hidapi/hidapi.h -- Installing: /usr/pkg/lib/pkgconfig/hidapi-netbsd.pc -- Installing: /usr/pkg/lib/libhidapi-libusb.so.0.16.0 -- Up-to-date: /usr/pkg/lib/libhidapi-libusb.so.0 -- Set non-toolchain portion of runtime path of "/usr/pkg/lib/libhidapi-libusb.so.0.16.0" to "" -- Up-to-date: /usr/pkg/lib/libhidapi-libusb.so -- Up-to-date: /usr/pkg/include/hidapi/hidapi.h -- Up-to-date: /usr/pkg/include/hidapi/hidapi_libusb.h -- Installing: /usr/pkg/lib/pkgconfig/hidapi-libusb.pc -- Installing: /usr/pkg/lib/cmake/hidapi/libhidapi.cmake -- Installing: /usr/pkg/lib/cmake/hidapi/libhidapi-release.cmake -- Installing: /usr/pkg/lib/cmake/hidapi/hidapi-config-version.cmake -- Installing: /usr/pkg/lib/cmake/hidapi/hidapi-config.cmake -- Installing: /usr/pkg/bin/hidtest -- Set non-toolchain portion of runtime path of "/usr/pkg/bin/hidtest" to "" netbsdvm$ sudo /usr/pkg/bin/hidtest hidapi test/example tool. Compiled with hidapi version 0.16.0, runtime version 0.16.0. Compile-time version matches runtime version of hidapi. Device Found type: 0925 1234 path: uhidev1 serial_number: Manufacturer: CYPRESS Product: EZ-USB FX2 HID USBHIDIO Release: 0 Interface: -1 Usage (page): 0x1 (0xffa0) Bus type: 1 (USB) Report Descriptor: (52 bytes) 0x06, 0xa0, 0xff, 0x09, 0x01, 0xa1, 0x01, 0x09, 0x02, 0xa1, 0x00, 0x06, 0xa1, 0xff, 0x09, 0x03, 0x09, 0x04, 0x15, 0x80, 0x25, 0x7f, 0x35, 0x00, 0x45, 0xff, 0x75, 0x08, 0x95, 0x80, 0x81, 0x02, 0x09, 0x05, 0x09, 0x06, 0x15, 0x80, 0x25, 0x7f, 0x35, 0x00, 0x45, 0xff, 0x75, 0x08, 0x95, 0x80, 0x91, 0x02, 0xc0, 0xc0, unable to open device ```
mcuee commented 2026-04-25 23:30:30 -05:00 (Migrated from github.com)
  1. building hidapitester using Makefile does not work, but using CMake works.
netbsdvm$ mkdir build
netbsdvm$ cd build/
netbsdvm$ cmake ..
-- The C compiler identification is GNU 10.5.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- hidapitester version: v0.5
-- Using local HIDAPI from: /home/mcuee/build/hidapitester/../hidapi
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Performing Test HIDAPI_ICONV_CONST
-- Performing Test HIDAPI_ICONV_CONST - Failed
-- Found PkgConfig: /usr/pkg/bin/pkg-config (found version "2.4.3")
-- Checking for module 'libusb-1.0>=1.0.9'
--   Found libusb-1.0, version 1.0.29
-- Check for Iconv
-- Performing Test Iconv_IS_BUILT_IN
-- Performing Test Iconv_IS_BUILT_IN - Success
-- Found Iconv: built in to C library
-- Configuring done (1.8s)
-- Generating done (0.2s)
-- Build files have been written to: /home/mcuee/build/hidapitester/build
netbsdvm$ make
[ 25%] Building C object hidapi/src/netbsd/CMakeFiles/hidapi_netbsd.dir/hid.c.o
[ 50%] Linking C static library libhidapi-netbsd.a
[ 50%] Built target hidapi_netbsd
[ 75%] Building C object CMakeFiles/hidapitester.dir/hidapitester.c.o
[100%] Linking C executable hidapitester
[100%] Built target hidapitester
2) building hidapitester using Makefile does not work, but using CMake works. ``` netbsdvm$ mkdir build netbsdvm$ cd build/ netbsdvm$ cmake .. -- The C compiler identification is GNU 10.5.0 -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working C compiler: /usr/bin/cc - skipped -- Detecting C compile features -- Detecting C compile features - done -- hidapitester version: v0.5 -- Using local HIDAPI from: /home/mcuee/build/hidapitester/../hidapi -- Performing Test CMAKE_HAVE_LIBC_PTHREAD -- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed -- Looking for pthread_create in pthreads -- Looking for pthread_create in pthreads - not found -- Looking for pthread_create in pthread -- Looking for pthread_create in pthread - found -- Found Threads: TRUE -- Performing Test HIDAPI_ICONV_CONST -- Performing Test HIDAPI_ICONV_CONST - Failed -- Found PkgConfig: /usr/pkg/bin/pkg-config (found version "2.4.3") -- Checking for module 'libusb-1.0>=1.0.9' -- Found libusb-1.0, version 1.0.29 -- Check for Iconv -- Performing Test Iconv_IS_BUILT_IN -- Performing Test Iconv_IS_BUILT_IN - Success -- Found Iconv: built in to C library -- Configuring done (1.8s) -- Generating done (0.2s) -- Build files have been written to: /home/mcuee/build/hidapitester/build netbsdvm$ make [ 25%] Building C object hidapi/src/netbsd/CMakeFiles/hidapi_netbsd.dir/hid.c.o [ 50%] Linking C static library libhidapi-netbsd.a [ 50%] Built target hidapi_netbsd [ 75%] Building C object CMakeFiles/hidapitester.dir/hidapitester.c.o [100%] Linking C executable hidapitester [100%] Built target hidapitester ```
mcuee commented 2026-04-25 23:33:17 -05:00 (Migrated from github.com)

However, it does not seem to work with the FX2HID example.

Using the original FX2HID example from Jan Axelson.
http://janaxelson.com/hidpage.htm

  1. Under Windows, it works fine.
PS C:\work\libusb\hidapitester> .\hidapitester_git_winapi.exe --vidpid 0925:1234 --open --buflen 64 -l 3 --send-output 0,1,2  --read-input
Opening device, vid/pid: 0x0925/0x1234
Writing output report of 3-bytes...wrote 3 bytes:
 00 01 02
Reading up to 3-byte input report, 250 msec timeout...read 2 bytes:
 01 02 00
Closing device
  1. Under NetBSD, it does not seem to work.
netbsdvm$ sudo ./hidapitester  --vidpid 0925:1234 --open --buflen 64 -l 3 --send-output 0,1,2  --read-input
Opening device, vid/pid: 0x0925/0x1234
Writing output report of 3-bytes...wrote -1 bytes:
 00 01 02
Reading up to 3-byte input report, 250 msec timeout...read 0 bytes:
Closing device

netbsdvm$ sudo ./hidapitester  --vidpid 0925:1234 --open --buflen 64 -l 2 --send-output 1,2  --read-input
Opening device, vid/pid: 0x0925/0x1234
Writing output report of 2-bytes...wrote -1 bytes:
 01 02
Reading up to 2-byte input report, 250 msec timeout...read 0 bytes:
Closing device
  1. Unfortunately even forcing the device to enumerate as a full speed USB device does not work. That was the issues with PR #730 under FreeBSD.
PS C:\Program Files\Oracle\VirtualBox> .\VBoxManage modifyvm "netbsd101vm" --usb-ohci on --usb-ehci off --usb-xhci off

Run log with the FX2HID default example with two bytes HID Input/Output report.

[mcuee@netbsdvm hidapitester]$ uname -a
NetBSD netbsdvm 10.1 NetBSD 10.1 (GENERIC) #0: Mon Dec 16 13:08:11 UTC 2024  mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/amd64/compile/GENERIC amd64

[mcuee@netbsdvm hidapitester]$ sudo ./hidapitester --list
0925/1234: CYPRESS - EZ-USB FX2 HID USBHIDIO
[mcuee@netbsdvm hidapitester]$ sudo ./hidapitester  --vidpid 0925:1234 --list-detail
0925/1234: CYPRESS - EZ-USB FX2 HID USBHIDIO
  vendorId:      0x0925
  productId:     0x1234
  usagePage:     0xFFA0
  usage:         0x0001
  serial_number:
  interface:     -1
  path: uhidev1

[mcuee@netbsdvm hidapitester]$ sudo ./hidapitester  --vidpid 0925:1234 --open --buflen 64 -l 3 --send-output 0,1,2  --read-input
Opening device, vid/pid: 0x0925/0x1234
Writing output report of 3-bytes...wrote -1 bytes:
 00 01 02
Reading up to 3-byte input report, 250 msec timeout...read 0 bytes:
Closing device

[mcuee@netbsdvm hidapitester]$ sudo usbdevs
addr 1: OHCI root hub, NetBSD
 addr 2: USB Tablet, VirtualBox
 addr 3: product 1234, vendor 0925

[mcuee@netbsdvm hidapitester]$ sudo usbdevs -v
Controller /dev/usb0:
addr 1: full speed, self powered, config 1, OHCI root hub(0x0000), NetBSD(0x0000), rev 1.00(0x0100)
 port 1 addr 2: full speed, power 100 mA, config 1, USB Tablet(0x0021), VirtualBox(0x80ee), rev 1.00(0x0100)
 port 2 addr 3: full speed, power 80 mA, config 1, product 1234(0x1234), vendor 0925(0x0925), rev 0.00(0x0000)
 port 3 powered
 port 4 powered
 port 5 powered
 port 6 powered
 port 7 powered
 port 8 powered
 port 9 powered
 port 10 powered
 port 11 powered
 port 12 powered
However, it does not seem to work with the FX2HID example. Using the original FX2HID example from Jan Axelson. http://janaxelson.com/hidpage.htm 1) Under Windows, it works fine. ``` PS C:\work\libusb\hidapitester> .\hidapitester_git_winapi.exe --vidpid 0925:1234 --open --buflen 64 -l 3 --send-output 0,1,2 --read-input Opening device, vid/pid: 0x0925/0x1234 Writing output report of 3-bytes...wrote 3 bytes: 00 01 02 Reading up to 3-byte input report, 250 msec timeout...read 2 bytes: 01 02 00 Closing device ``` 2) Under NetBSD, it does not seem to work. ``` netbsdvm$ sudo ./hidapitester --vidpid 0925:1234 --open --buflen 64 -l 3 --send-output 0,1,2 --read-input Opening device, vid/pid: 0x0925/0x1234 Writing output report of 3-bytes...wrote -1 bytes: 00 01 02 Reading up to 3-byte input report, 250 msec timeout...read 0 bytes: Closing device netbsdvm$ sudo ./hidapitester --vidpid 0925:1234 --open --buflen 64 -l 2 --send-output 1,2 --read-input Opening device, vid/pid: 0x0925/0x1234 Writing output report of 2-bytes...wrote -1 bytes: 01 02 Reading up to 2-byte input report, 250 msec timeout...read 0 bytes: Closing device ``` 3) Unfortunately even forcing the device to enumerate as a full speed USB device does not work. That was the issues with PR #730 under FreeBSD. ``` PS C:\Program Files\Oracle\VirtualBox> .\VBoxManage modifyvm "netbsd101vm" --usb-ohci on --usb-ehci off --usb-xhci off ``` Run log with the FX2HID default example with two bytes HID Input/Output report. ``` [mcuee@netbsdvm hidapitester]$ uname -a NetBSD netbsdvm 10.1 NetBSD 10.1 (GENERIC) #0: Mon Dec 16 13:08:11 UTC 2024 mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/amd64/compile/GENERIC amd64 [mcuee@netbsdvm hidapitester]$ sudo ./hidapitester --list 0925/1234: CYPRESS - EZ-USB FX2 HID USBHIDIO [mcuee@netbsdvm hidapitester]$ sudo ./hidapitester --vidpid 0925:1234 --list-detail 0925/1234: CYPRESS - EZ-USB FX2 HID USBHIDIO vendorId: 0x0925 productId: 0x1234 usagePage: 0xFFA0 usage: 0x0001 serial_number: interface: -1 path: uhidev1 [mcuee@netbsdvm hidapitester]$ sudo ./hidapitester --vidpid 0925:1234 --open --buflen 64 -l 3 --send-output 0,1,2 --read-input Opening device, vid/pid: 0x0925/0x1234 Writing output report of 3-bytes...wrote -1 bytes: 00 01 02 Reading up to 3-byte input report, 250 msec timeout...read 0 bytes: Closing device [mcuee@netbsdvm hidapitester]$ sudo usbdevs addr 1: OHCI root hub, NetBSD addr 2: USB Tablet, VirtualBox addr 3: product 1234, vendor 0925 [mcuee@netbsdvm hidapitester]$ sudo usbdevs -v Controller /dev/usb0: addr 1: full speed, self powered, config 1, OHCI root hub(0x0000), NetBSD(0x0000), rev 1.00(0x0100) port 1 addr 2: full speed, power 100 mA, config 1, USB Tablet(0x0021), VirtualBox(0x80ee), rev 1.00(0x0100) port 2 addr 3: full speed, power 80 mA, config 1, product 1234(0x1234), vendor 0925(0x0925), rev 0.00(0x0000) port 3 powered port 4 powered port 5 powered port 6 powered port 7 powered port 8 powered port 9 powered port 10 powered port 11 powered port 12 powered ```
mcuee commented 2026-04-26 01:12:02 -05:00 (Migrated from github.com)

I will test with a physical machine and another generic USB HID device.

I will test with a physical machine and another generic USB HID device.
mcuee commented 2026-04-27 10:08:51 -05:00 (Migrated from github.com)

Still using VM but changes to another Generic USB HID device mentioned here. The device works fine under FreeBSD 15 VM using PR #730.

Feature Report loopback is working fine but Input/Output loopback does not work under NetBSD 10.1 VM.

netbsdvm$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-output 2,5,6  --read-input
Opening device, vid/pid: 0x0925/0x7001
Writing output report of 3-bytes...wrote 3 bytes:
 02 05 06
Reading up to 3-byte input report, 250 msec timeout...read 0 bytes:
Closing device

netbsdvm$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-output 2,5,6  --read-input
Opening device, vid/pid: 0x0925/0x7001
Writing output report of 3-bytes...wrote 3 bytes:
 02 05 06
Reading up to 3-byte input report, 250 msec timeout...read 0 bytes:
Closing device

netbsdvm$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-feature 3,5,6  --read-feature 4
Opening device, vid/pid: 0x0925/0x7001
Writing 3-byte feature report...wrote 3 bytes:
 03 05 06
Reading 3-byte feature report, report_id 4...read 3 bytes:
 04 05 06
Closing device

netbsdvm$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-feature 3,5,6  --read-feature 4
Opening device, vid/pid: 0x0925/0x7001
Writing 3-byte feature report...wrote 3 bytes:
 03 05 06
Reading 3-byte feature report, report_id 4...read 3 bytes:
 04 05 06
Still using VM but changes to another Generic USB HID device mentioned here. The device works fine under FreeBSD 15 VM using PR #730. * https://github.com/libusb/hidapi/pull/730#issuecomment-4327993991 Feature Report loopback is working fine but Input/Output loopback does not work under NetBSD 10.1 VM. ``` netbsdvm$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-output 2,5,6 --read-input Opening device, vid/pid: 0x0925/0x7001 Writing output report of 3-bytes...wrote 3 bytes: 02 05 06 Reading up to 3-byte input report, 250 msec timeout...read 0 bytes: Closing device netbsdvm$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-output 2,5,6 --read-input Opening device, vid/pid: 0x0925/0x7001 Writing output report of 3-bytes...wrote 3 bytes: 02 05 06 Reading up to 3-byte input report, 250 msec timeout...read 0 bytes: Closing device netbsdvm$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-feature 3,5,6 --read-feature 4 Opening device, vid/pid: 0x0925/0x7001 Writing 3-byte feature report...wrote 3 bytes: 03 05 06 Reading 3-byte feature report, report_id 4...read 3 bytes: 04 05 06 Closing device netbsdvm$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-feature 3,5,6 --read-feature 4 Opening device, vid/pid: 0x0925/0x7001 Writing 3-byte feature report...wrote 3 bytes: 03 05 06 Reading 3-byte feature report, report_id 4...read 3 bytes: 04 05 06 ```
mcuee commented 2026-05-01 17:32:11 -05:00 (Migrated from github.com)

Still using VirtualBox VM.

CircuitPython USB HID example from here, using Raspberry Pi Pico 2 (loop back the contents of Output Report 2 to Input Report 1, other than the first byte which is the Report ID).
https://github.com/libusb/hidapi/discussions/590#discussioncomment-6201631

It is mostly working except for the last case -- somehow Input Report ID 1 is missing.

[mcuee@netbsdvm build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63 --timeout 2000 --read-input 1
Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1
Device opened
Writing output report of 64-bytes...wrote 64 bytes:
 02 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F
Reading up to 64-byte input report, 2000 msec timeout...read 63 bytes:
 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20
 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 00
Closing device

[mcuee@netbsdvm build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7 --timeout 2000 --read-input 1
Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1
Device opened
Writing output report of 64-bytes...wrote 64 bytes:
 02 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Reading up to 64-byte input report, 2000 msec timeout...read 63 bytes:
 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Closing device

[mcuee@netbsdvm build]$ sudo ./hidapitester  --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,3,4,5 --timeout 1000 --read-input 1
Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1
Device opened
Writing output report of 64-bytes...wrote 64 bytes:
 02 03 04 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Reading up to 64-byte input report, 1000 msec timeout...read 63 bytes:
 03 04 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Closing device
Still using VirtualBox VM. CircuitPython USB HID example from here, using Raspberry Pi Pico 2 (loop back the contents of Output Report 2 to Input Report 1, other than the first byte which is the Report ID). https://github.com/libusb/hidapi/discussions/590#discussioncomment-6201631 It is mostly working except for the last case -- somehow Input Report ID 1 is missing. ``` [mcuee@netbsdvm build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63 --timeout 2000 --read-input 1 Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1 Device opened Writing output report of 64-bytes...wrote 64 bytes: 02 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F Reading up to 64-byte input report, 2000 msec timeout...read 63 bytes: 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 00 Closing device [mcuee@netbsdvm build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7 --timeout 2000 --read-input 1 Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1 Device opened Writing output report of 64-bytes...wrote 64 bytes: 02 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Reading up to 64-byte input report, 2000 msec timeout...read 63 bytes: 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Closing device [mcuee@netbsdvm build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,3,4,5 --timeout 1000 --read-input 1 Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1 Device opened Writing output report of 64-bytes...wrote 64 bytes: 02 03 04 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Reading up to 64-byte input report, 1000 msec timeout...read 63 bytes: 03 04 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Closing device ```
mcuee commented 2026-05-02 04:09:31 -05:00 (Migrated from github.com)

Using a physical machine, Intel N4200 CPU based mini PC

CircuitPython USB HID example from here, using Raspberry Pi Pico 2 (loop back the contents of Output Report 2 to Input Report 1, other than the first byte which is the Report ID).

Interestingly it work for the odd time but failed for the even time.

[mcuee@netbsd10n4200 build]$ uname -a
NetBSD netbsd10n4200.localdomain 10.1 NetBSD 10.1 (GENERIC) #0: Mon Dec 16 13:08:11 UTC 2024  mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/amd64/compile/GENERIC amd64

[mcuee@netbsd10n4200 build]$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/lto-wrapper
Target: x86_64--netbsd
Configured with: /usr/src/tools/gcc/../../external/gpl3/gcc/dist/configure --target=x86_64--netbsd --enable-long-long --enable-threads --with-bugurl=http://www.NetBSD.org/support/send-pr.html --with-pkgversion='NetBSD nb2 20230710' --with-system-zlib --without-isl --enable-__cxa_atexit --enable-libstdcxx-time=rt --enable-libstdcxx-threads --with-diagnostics-color=auto-if-env --with-tune=nocona --with-default-libstdcxx-abi=new --with-mpc-lib=/var/obj/mknative/amd64-x86_64/usr/src/external/lgpl3/mpc/lib/libmpc --with-mpfr-lib=/var/obj/mknative/amd64-x86_64/usr/src/external/lgpl3/mpfr/lib/libmpfr --with-gmp-lib=/var/obj/mknative/amd64-x86_64/usr/src/external/lgpl3/gmp/lib/libgmp --with-mpc-include=/usr/src/external/lgpl3/mpc/dist/src --with-mpfr-include=/usr/src/external/lgpl3/mpfr/dist/src --with-gmp-include=/usr/src/external/lgpl3/gmp/lib/libgmp/arch/x86_64 --enable-tls --disable-multilib --disable-libstdcxx-pch --build=x86_64--netbsd --host=x86_64--netbsd --with-sysroot=/var/obj/mknative/amd64-x86_64/usr/src/destdir.amd64
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 10.5.0 (nb3 20231008) 


[mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63 --timeout 2000 --read-input 1
Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1
Device opened
Writing output report of 64-bytes...wrote 64 bytes:
 02 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F
Reading up to 64-byte input report, 2000 msec timeout...read 63 bytes:
 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20
 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 00
Closing device

[mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63 --timeout 2000 --read-input 1
Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1
Device opened
Writing output report of 64-bytes...wrote 64 bytes:
 02 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F
Reading up to 64-byte input report, 2000 msec timeout...read 0 bytes:
Closing device

[mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63 --timeout 2000 --read-input 1
Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1
Device opened
Writing output report of 64-bytes...wrote 64 bytes:
 02 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F
Reading up to 64-byte input report, 2000 msec timeout...read 63 bytes:
 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20
 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 00
Closing device

[mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63 --timeout 2000 --read-input 1
Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1
Device opened
Writing output report of 64-bytes...wrote 64 bytes:
 02 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F
Reading up to 64-byte input report, 2000 msec timeout...read 0 bytes:
Closing device

[mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7 --timeout 2000 --read-input 1
Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1
Device opened
Writing output report of 64-bytes...wrote 64 bytes:
 02 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Reading up to 64-byte input report, 2000 msec timeout...read 63 bytes:
 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Closing device

[mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7 --timeout 2000 --read-input 1
Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1
Device opened
Writing output report of 64-bytes...wrote 64 bytes:
 02 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Reading up to 64-byte input report, 2000 msec timeout...read 0 bytes:
Closing device

[mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7 --timeout 2000 --read-input 1
Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1
Device opened
Writing output report of 64-bytes...wrote 64 bytes:
 02 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Reading up to 64-byte input report, 2000 msec timeout...read 63 bytes:
 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Closing device

[mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7 --timeout 2000 --read-input 1
Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1
Device opened
Writing output report of 64-bytes...wrote 64 bytes:
 02 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Reading up to 64-byte input report, 2000 msec timeout...read 0 bytes:
Closing device
Using a physical machine, Intel N4200 CPU based mini PC CircuitPython USB HID example from here, using Raspberry Pi Pico 2 (loop back the contents of Output Report 2 to Input Report 1, other than the first byte which is the Report ID). Interestingly it work for the odd time but failed for the even time. ``` [mcuee@netbsd10n4200 build]$ uname -a NetBSD netbsd10n4200.localdomain 10.1 NetBSD 10.1 (GENERIC) #0: Mon Dec 16 13:08:11 UTC 2024 mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/amd64/compile/GENERIC amd64 [mcuee@netbsd10n4200 build]$ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/libexec/lto-wrapper Target: x86_64--netbsd Configured with: /usr/src/tools/gcc/../../external/gpl3/gcc/dist/configure --target=x86_64--netbsd --enable-long-long --enable-threads --with-bugurl=http://www.NetBSD.org/support/send-pr.html --with-pkgversion='NetBSD nb2 20230710' --with-system-zlib --without-isl --enable-__cxa_atexit --enable-libstdcxx-time=rt --enable-libstdcxx-threads --with-diagnostics-color=auto-if-env --with-tune=nocona --with-default-libstdcxx-abi=new --with-mpc-lib=/var/obj/mknative/amd64-x86_64/usr/src/external/lgpl3/mpc/lib/libmpc --with-mpfr-lib=/var/obj/mknative/amd64-x86_64/usr/src/external/lgpl3/mpfr/lib/libmpfr --with-gmp-lib=/var/obj/mknative/amd64-x86_64/usr/src/external/lgpl3/gmp/lib/libgmp --with-mpc-include=/usr/src/external/lgpl3/mpc/dist/src --with-mpfr-include=/usr/src/external/lgpl3/mpfr/dist/src --with-gmp-include=/usr/src/external/lgpl3/gmp/lib/libgmp/arch/x86_64 --enable-tls --disable-multilib --disable-libstdcxx-pch --build=x86_64--netbsd --host=x86_64--netbsd --with-sysroot=/var/obj/mknative/amd64-x86_64/usr/src/destdir.amd64 Thread model: posix Supported LTO compression algorithms: zlib gcc version 10.5.0 (nb3 20231008) [mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63 --timeout 2000 --read-input 1 Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1 Device opened Writing output report of 64-bytes...wrote 64 bytes: 02 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F Reading up to 64-byte input report, 2000 msec timeout...read 63 bytes: 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 00 Closing device [mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63 --timeout 2000 --read-input 1 Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1 Device opened Writing output report of 64-bytes...wrote 64 bytes: 02 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F Reading up to 64-byte input report, 2000 msec timeout...read 0 bytes: Closing device [mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63 --timeout 2000 --read-input 1 Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1 Device opened Writing output report of 64-bytes...wrote 64 bytes: 02 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F Reading up to 64-byte input report, 2000 msec timeout...read 63 bytes: 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 00 Closing device [mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63 --timeout 2000 --read-input 1 Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1 Device opened Writing output report of 64-bytes...wrote 64 bytes: 02 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F Reading up to 64-byte input report, 2000 msec timeout...read 0 bytes: Closing device [mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7 --timeout 2000 --read-input 1 Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1 Device opened Writing output report of 64-bytes...wrote 64 bytes: 02 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Reading up to 64-byte input report, 2000 msec timeout...read 63 bytes: 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Closing device [mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7 --timeout 2000 --read-input 1 Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1 Device opened Writing output report of 64-bytes...wrote 64 bytes: 02 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Reading up to 64-byte input report, 2000 msec timeout...read 0 bytes: Closing device [mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7 --timeout 2000 --read-input 1 Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1 Device opened Writing output report of 64-bytes...wrote 64 bytes: 02 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Reading up to 64-byte input report, 2000 msec timeout...read 63 bytes: 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Closing device [mcuee@netbsd10n4200 build]$ sudo ./hidapitester --usagePage 0xff00 --usage 1 --open -l 64 --send-output 2,1,2,3,4,5,6,7 --timeout 2000 --read-input 1 Opening device, vid/pid:0x0000/0x0000, usagePage/usage: FF00/1 Device opened Writing output report of 64-bytes...wrote 64 bytes: 02 01 02 03 04 05 06 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Reading up to 64-byte input report, 2000 msec timeout...read 0 bytes: Closing device ```
mcuee commented 2026-05-02 04:18:52 -05:00 (Migrated from github.com)

Still using VM but changes to another Generic USB HID device mentioned here. The device works fine under FreeBSD 15 VM using PR #730.

* [Add hidraw backend for FreeBSD #730 (comment)](https://github.com/libusb/hidapi/pull/730#issuecomment-4327993991)

Feature Report loopback is working fine but Input/Output loopback does not work under NetBSD 10.1 VM.

Same for the physical machine.

[mcuee@netbsd10n4200 build]$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-output 2,5,6  --read-input
Opening device, vid/pid: 0x0925/0x7001
Writing output report of 3-bytes...wrote 3 bytes:
 02 05 06
Reading up to 3-byte input report, 250 msec timeout...read 0 bytes:
Closing device

[mcuee@netbsd10n4200 build]$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-output 2,5,6  --read-input
Opening device, vid/pid: 0x0925/0x7001
Writing output report of 3-bytes...wrote 3 bytes:
 02 05 06
Reading up to 3-byte input report, 250 msec timeout...read 0 bytes:
Closing device

[mcuee@netbsd10n4200 build]$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-feature 3,5,6  --read-feature 4
Opening device, vid/pid: 0x0925/0x7001
Writing 3-byte feature report...wrote 3 bytes:
 03 05 06
Reading 3-byte feature report, report_id 4...read 3 bytes:
 04 05 06
Closing device

[mcuee@netbsd10n4200 build]$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-feature 3,5,6  --read-feature 4
Opening device, vid/pid: 0x0925/0x7001
Writing 3-byte feature report...wrote 3 bytes:
 03 05 06
Reading 3-byte feature report, report_id 4...read 3 bytes:
 04 05 06
Closing device
> Still using VM but changes to another Generic USB HID device mentioned here. The device works fine under FreeBSD 15 VM using PR [#730](https://github.com/libusb/hidapi/pull/730). > > * [Add hidraw backend for FreeBSD #730 (comment)](https://github.com/libusb/hidapi/pull/730#issuecomment-4327993991) > > > Feature Report loopback is working fine but Input/Output loopback does not work under NetBSD 10.1 VM. Same for the physical machine. ``` [mcuee@netbsd10n4200 build]$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-output 2,5,6 --read-input Opening device, vid/pid: 0x0925/0x7001 Writing output report of 3-bytes...wrote 3 bytes: 02 05 06 Reading up to 3-byte input report, 250 msec timeout...read 0 bytes: Closing device [mcuee@netbsd10n4200 build]$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-output 2,5,6 --read-input Opening device, vid/pid: 0x0925/0x7001 Writing output report of 3-bytes...wrote 3 bytes: 02 05 06 Reading up to 3-byte input report, 250 msec timeout...read 0 bytes: Closing device [mcuee@netbsd10n4200 build]$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-feature 3,5,6 --read-feature 4 Opening device, vid/pid: 0x0925/0x7001 Writing 3-byte feature report...wrote 3 bytes: 03 05 06 Reading 3-byte feature report, report_id 4...read 3 bytes: 04 05 06 Closing device [mcuee@netbsd10n4200 build]$ sudo ./hidapitester --vidpid 0925:7001 --open --buflen 64 -l 3 --send-feature 3,5,6 --read-feature 4 Opening device, vid/pid: 0x0925/0x7001 Writing 3-byte feature report...wrote 3 bytes: 03 05 06 Reading 3-byte feature report, report_id 4...read 3 bytes: 04 05 06 Closing device ```
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