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* STM32F2: Add EXTI support.Marti Bolivar2012-06-031-0/+33
Add series headers to keep the base pointers, and (on F2) use SYSCFG to tell exti_do_select() where the EXTI control registers are. No surprises. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>