uwb-core
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Transition to using bus_driver for SPI
Currently a semaphore in the bsp is used top avoid collisions on the spi bus used for the dwX000 and hal_spi_XX calls used to access the bus.
- What needs to be changed in bsp's to support the bus_driver_spi?
- What needs to change in the dwX000_hal?
- Would this allow us to simplify the linux / mynewt interfacing currently in use in dwX000_hal.c?