Host-Controller Interface (HCI) Fundamentals

[user_1600091]

Hi everyone,

I want to learn Host-Controller Interface (HCI) protocol.

• For testing and debugging, the Component can be configured to HCI mode through a Component embedded UART.
• The HCI layer implements a command, event, and data interface to allow link layer access from upper layers such as GAP, L2CAP, and SMP.
• HCI over UART In this mode the BLE host will communicate with the BLE controller via the UART.

My questions.

• What are the differences between software HCI - HCI over UART
• Is there a code sample outside this Day018_Direct_Test_Mode ?
• What can be done with software HCI - HCI over UART
• For example, can it be applied Server-Client communication?

[Anonymous]

I haven't played with the HCI mode specifically, but playing with the PSoC 4 chips, you can use both server and client behaviors.

The HCI seems like a closer-to-hardware interface, but using the same principles as the Cypress BLE API.