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authorMarti Bolivar <mbolivar@leaflabs.com>2012-06-01 01:10:47 -0400
committerMarti Bolivar <mbolivar@leaflabs.com>2012-06-01 01:28:51 -0400
commitd483f8fa0c7c1f65c926b24d6c66275953d03c4f (patch)
tree84cd29e2f201fbd6bbac753027c146061e0f05e4 /wirish/boards/maple_native/board.cpp
parentb1e06d3acaa72976042314c1debec008c5ac54d7 (diff)
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Bring back HardwareSerial.
To make this happen, we need to have <board/board.h> tell us whether or not it's got each of the USARTs. Do that with BOARD_HAVE_USARTn, for n = 1,...,6. This lets us define HardwareSerial instances only when appropriate, and gets rid of some board-specific hacks we'd accumulated. The new <libmaple/usart.h> now has a convenience function for determining the bus rate by using the appropriate STM32_PCLKx macro, so we can shave a uint32 per instance, which is nice given that they're all going to be in memory. This changes the constructor arguments, but the API only specifies the semantics of the predefined instances, so this is still backwards-compatible. (We should look into storing the instances in Flash -- they don't change, after all.) We don't actually need struct usart_dev's definition in HardwareSerial.h, so replace it with a forward declaration and include <libmaple/usart.h> it in HardwareSerial.cpp instead. Assert some copyrights. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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