Trait Pins
stm32f042_hal::spi
pub trait Pins<Spi> { }
impl Pins<SPI1> for (PA5<Alternate<AF0>>, PA6<Alternate<AF0>>, PA7<Alternate<AF0>>)
impl Pins<SPI1> for (PB3<Alternate<AF0>>, PB4<Alternate<AF0>>, PB5<Alternate<AF0>>)