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* stm32f2: Improve GPIO alternate function support.Marti Bolivar2012-04-111-4/+32
| | | | | | | | | Add GPIO_AFRL and GPIO_AFRH bit definitions; these seem to have been overlooked. Add enum gpio_af to give labels to the various functions. Add gpio_set_af() convenience routine for configuring a GPIO's alternate function. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Initial STM32F2 GPIO support.Marti Bolivar2012-04-111-0/+157
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>