Also, if the battery is a 3DR Solo battery, it checks for the button
press on the battery which sets the is_powering_off flag.
The check for whether the battery is a 3DR Solo battery is based on
whether the Manufacturer Name, Device Name and Device Chemistry all
match the that of the standard 3DR Solo battery.
The button press detection relies on reading the MANUFACTURER_DATA
register. The implementation of what information is returned when reading
this register differs from manufacturer to manufacturer.
This has been commented out until an elegant solution can be found to detect
the battery shutdown on different batteries manufactured by different
manufacturers.
Since mtd already checks whether CONFIG_MTD_RAMTRON is set in
defconfig use this define to check whether to call ramtron_attach()
or at24xxx_attach() in the main function, instead of checking
CONFIG_ARCH_BOARD_PX4FMU-V1.
Also instead of using #ifdef CONFIG_ARCH_BOARD_AEROCORE to determine
whether to start mtd on spi 2 or 4, rather use a new board define
PX4_SPI_BUS_RAMTRON in the board_config.h file.
ksschwabe