ambiq-hal 0.3.3

HAL for the Ambiq Apollo MCU and boards
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

// The GPIO_PADKEY register must be set to 0x73 before writing to the PADREGn registers,
// and should be cleared (or set to another value) afterwards.
const PAD_KEY: u32 = 0x73;

pub(crate) fn gpio_cfg<F, R>(f: F) -> R
where
    F: FnOnce() -> R,
{
    cortex_m::interrupt::free(|_| {
        // page 419
        unsafe {
            (*pac::GPIO::ptr()).padkey.write(|w| w.bits(PAD_KEY));
        }

        let r = f();

        unsafe {
            (*pac::GPIO::ptr()).padkey.write(|w| w.bits(0x00));
        }

        r
    })
}

pub mod pin;
pub mod redboard_artemis;
pub mod redboard_artemis_nano;

pub use pin::Mode;

#[cfg(feature = "sparkfun-redboard")]
pub use redboard_artemis::Pins;

#[cfg(feature = "sparkfun-redboard-nano")]
pub use redboard_artemis_nano::Pins;