forked from rust-embedded/cortex-m
-
Notifications
You must be signed in to change notification settings - Fork 0
/
primask.rs
35 lines (31 loc) · 751 Bytes
/
primask.rs
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
//! Priority mask register
/// All exceptions with configurable priority are ...
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub enum Primask {
/// Active
Active,
/// Inactive
Inactive,
}
impl Primask {
/// All exceptions with configurable priority are active
#[inline]
pub fn is_active(self) -> bool {
self == Primask::Active
}
/// All exceptions with configurable priority are inactive
#[inline]
pub fn is_inactive(self) -> bool {
self == Primask::Inactive
}
}
/// Reads the CPU register
#[inline]
pub fn read() -> Primask {
let r: u32 = call_asm!(__primask_r() -> u32);
if r & (1 << 0) == (1 << 0) {
Primask::Inactive
} else {
Primask::Active
}
}