HCI SPI
Overview
Expose Bluetooth Controller support over SPI to another device/CPU using the Zephyr SPI HCI transport protocol (similar to BlueNRG).
Requirements
A board with SPI slave, GPIO and Bluetooth Low Energy support.
Building and Running
You then need to ensure that your devicetree defines a node
for the HCI SPI slave device with compatible
zephyr,bt-hci-spi-slave. This node sets an interrupt line to
the host and associates the application with a SPI bus to use.
See boards/nrf51dk_nrf51422.overlay in this sample directory for an example overlay for the nRF51 DK board.
You can then build this application and flash it onto your board in the usual way; see Supported Boards for board-specific building and flashing information.
You will also need a separate chip acting as BT HCI SPI master. This
application is compatible with the HCI SPI master driver provided by
Zephyr’s Bluetooth HCI driver core; see the help associated with the
CONFIG_BT_SPI configuration option for more information.
Refer to Bluetooth samples for general Bluetooth information, and to Providing Bluetooth to 96b_carbon for instructions specific to the 96Boards Carbon board.