💡[FEATURE] host_hid_to_device_cdc example - controlling keyboard LEDs - working sample code

[samartzidis]

Hi,

In the host_hid_to_device_cdc example, you mention in a comment:
// TODO control LED on keyboard of host stack

In the above example, I tried playing with the keyboard Caps Lock LED using the tuh_hid_set_report function like so:

static uint8_t leds = KEYBOARD_LED_CAPSLOCK; //  = 2
tuh_hid_set_report(dev_addr, instance, 0, HID_REPORT_TYPE_OUTPUT, &leds, sizeof(leds));

but failed to get any results.

Is it because I am not doing things the right way or is it something that the Pico-PIO-USB library does not yet support?

Thank you.

[sekigon-gonnoc]

This may help you #64

[samartzidis]

Thank you so much for the quick reply!

The code you've added calls the tuh_hid_set_report on CAPS LOCK key code received and I have verified that it gets called. Nonetheless, it still fails to light the CAPS LOCK led up. If this code worked for you then it definitely has to do with my specific keyboard or possibly with the version of the tinyusb library. I will give it a try with different USB keyboards first.

[samartzidis]

The error was with my setup. On second attempt I can verify that this now worked. Thanks.