HID (HOGPD) - example.

Hello, 

i search an example for HID profile. I want to create a keyboard to send key to PC or android device. Currently i have a hogpd profile added to empty_peripherial_template. I found a app_hogpd and app_hogpd_task files in 14858 rcu example. I want to know what i must do to send a key (or custom key) to host.

Can you give me an instructions or example ?