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Board portability is implemented in boards.h, libmaple.h, and stm32.h.
At compile time, we currently expect one of STM32_MEDIUM_DENSITY or
STM32_HIGH_DENSITY to be defined. There's no support for low-density
chips. XL-density isn't in the near horizon; patches welcome. You'll
also need to define some BOARD_foo if you expect to use Wirish; this
comes along with some additional assumptions about your board's layout.
The code in usb/ is not very portable at all right now; expect this to
change in the future, but for now, we're focusing on rolling out a
more complete backend.
A file should be added to ./notes describing the pin numbering of any
new board you add.
NVIC Notes:
Only CANBUS and USB OTG use interrupts above #63, but I updated the nvic code anyways
RCC Notes:
Added some clock stuff to all boards even though they aren't usable... blah.
SPI Notes:
SPI3 is only in XL chips, so we don't handle that.
TIMER Notes:
The wirish timer implementation should be refactored to use pin numbers.
USART Notes:
The USART/UART nomeclature is a little mixed up.
TODO: portability of HardwareSerial, HardwareSPI
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