Function mynewt::hw::hal::hal_gpio_init_in

pub unsafe extern "C" fn hal_gpio_init_in(
    pin: c_int, 
    pull: hal_gpio_pull_t
) -> c_int

Initializes the specified pin as an input

• pin: Pin number to set as input
• pull: pull type

Return: int 0: no error; -1 otherwise.