Sending Function Keys using nrf52832 HID Keyboard

[xhr0428]

Hi, I need to use nrf52832 as HID keyboard and send function keys F1-F9 to computer. I have tired to run HID keyboard example in nrf5 SDK. How do I send function keys instead of ASCII codes of the letters? Thanks

[Håkon Alseth]

Hi,

 

Please see this document, page 55, for the usage table you're interested in:

https://www.usb.org/sites/default/files/documents/hut1_12v2.pdf

In order to send a given data stream, you can create a function similar to this one:

https://github.com/Rallare/nrf51_ble_app_hids_kbd_consumercontrol/blob/master/main.c#L1058

 

Kind regards,

Håkon

[xhr0428]

Hello Hakon,

Do you have any example that works on nRF52 development board? The Example you linked seems to be for nRF51 board.

Is there any document to explain how report_map_data is determined?

Also where are the values for each control action from? I couldn't find them in the USB document.

typedef enum
	{
	RELEASE_KEY = 0x00,
	CONSUMER_CTRL_PLAY = 0x01,
	CONSUMER_CTRL_ALCCC = 0x02,
	CONSUMER_CTRL_SCAN_NEXT_TRACK = 0x04,
	CONSUMER_CTRL_SCAN_PREV_TRACK = 0x08,
	CONSUMER_CTRL_VOL_DW = 0x10,
	CONSUMER_CTRL_VOL_UP = 0x20,
	CONSUMER_CTRL_AC_FORWARD = 0x40,
	CONSUMER_CTRL_AC_BACK = 0x80,
	} consumer_control_t;

Thanks

[Håkon Alseth]

Hi,

xhr0428 said:

Is there any document to explain how report_map_data is determined?

In BLE HID over GATT, the transport layer is closely coupled with USB HID. If you want to know more, I would recommend reading up on "usb descriptors" in general, on sites like "usb made simple" or "usb in a nutshell".

If you look at a USB descriptor, they have a usage, and that usage can be looked up in the previously linked document.

Kind regards,

Håkon