HCI Transport EM9304 API API
src/hci_transport_em9304_spi.h : The EM9304 uses an extended SPI interface and this HCI Transport is based on the the btstack_em9304.h interface.
/*
* @brief Setup H4 over SPI instance for EM9304 with em9304_spi_driver
* @param em9304_spi_driver to use
*/
const hci_transport_t * hci_transport_em9304_spi_instance(const btstack_em9304_spi_t * em9304_spi_driver);