HP GK100F keyboard no keystrokes detected

[hathach]

Discussed in https://github.com/hathach/tinyusb/discussions/1636

^{Originally posted by **jeroentaverne** September 12, 2022} Hardware: Raspberry Pi Pico acting as USB host Software: TinyUSB example cdc_msc_hid Log: see attached file This keyboard somehow shows up as a keyboard and mouse, but doesn't have any mouse/touchpad/trackball capabilities. Keyboard protocol shows up as instance 0, mouse protocol as instance 1, but HID_ITF_PROTOCOL_NONE isn't reported by this keyboard. After the logging output stops, the RGB lightning is not enabled and no keystrokes can be received. After I change the code by executing tuh_hid_set_report(dev_addr, instance, 0, HID_REPORT_TYPE_OUTPUT, (void*)value, 1) when the keyboard protocol is detected, the RGB lighting of the keyboard is enabled, and the keystrokes are actually received. Is there an USB HID incompatibility in this keyboard, or should TinyUSB be aware of this issue to get these kind of keyboards working out of the box without example modification? What would be the correct location in the example code to execute tuh_hid_set_report? This because after my modification the mouse protocol isn't detected anymore, so any real keyboard/mouse hardware combo detection would fail. Thanks! [HP_GK100F.txt](https://github.com/hathach/tinyusb/files/9547441/HP_GK100F.txt)

[hathach]

This is the code I added. It will make the keystrokes work, but the "mouse" instance is not reported anymore. I will send you a logfile as well.

printf("HID Interface Protocol = %s\r\n", protocol_str[itf_protocol]);

• if (itf_protocol == HID_ITF_PROTOCOL_KEYBOARD )
• {
• static uint8_t value = 0;
• printf("Executing tuh_hid_set_report\n");
• tuh_hid_set_report(dev_addr, instance, 0, HID_REPORT_TYPE_OUTPUT, (void*)&value, 1);

• }

  // By default host stack will use activate boot protocol on supported interface.

Originally posted by @jeroentaverne in https://github.com/hathach/tinyusb/discussions/1636#discussioncomment-3633093

HP_GK100F_with_set_report.txt