30 lines
1013 B
Rust
30 lines
1013 B
Rust
|
/// Get this device's unique 96-bit ID.
|
||
|
|
pub fn uid() -> &'static [u8; 12] {
|
||
|
|
unsafe { &*crate::pac::UID.uid(0).as_ptr().cast::<[u8; 12]>() }
|
||
|
|
}
|
||
|
|
|
||
|
|
/// Get this device's unique 96-bit ID, encoded into a string of 24 hexadecimal ASCII digits.
|
||
|
|
pub fn uid_hex() -> &'static str {
|
||
|
|
unsafe { core::str::from_utf8_unchecked(uid_hex_bytes()) }
|
||
|
|
}
|
||
|
|
|
||
|
|
/// Get this device's unique 96-bit ID, encoded into 24 hexadecimal ASCII bytes.
|
||
|
|
pub fn uid_hex_bytes() -> &'static [u8; 24] {
|
||
|
|
const HEX: &[u8; 16] = b"0123456789ABCDEF";
|
||
|
|
static mut UID_HEX: [u8; 24] = [0; 24];
|
||
|
|
static mut LOADED: bool = false;
|
||
|
|
critical_section::with(|_| unsafe {
|
||
|
|
if !LOADED {
|
||
|
|
let uid = uid();
|
||
|
|
for (idx, v) in uid.iter().enumerate() {
|
||
|
|
let lo = v & 0x0f;
|
||
|
|
let hi = (v & 0xf0) >> 4;
|
||
|
|
UID_HEX[idx * 2] = HEX[hi as usize];
|
||
|
|
UID_HEX[idx * 2 + 1] = HEX[lo as usize];
|
||
|
|
}
|
||
|
|
LOADED = true;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
unsafe { &UID_HEX }
|
||
|
|
}
|