RTOS/CC2640R2F: Does anyone knows how to setup a hid host to receive the key-stroke from a ble keyboard?

Tool/software: TI-RTOS

I am actually using the CC2640R2F for my project. I already figured out how to use CC2640R2F as a keyboard, but how can I receive the key-stroke from it? In our project, no smartphones or PCs are involved. We need to make these two devices talk through HID.

Thanks a lot.