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#![no_std]
use cortex_m::interrupt;
#[cfg(any(feature = "stm32f0", feature = "stm32f3"))]
mod pointers {
pub const DEVICE_ID_PTR: *const u8 = 0x1FFF_F7AC as _;
pub const FLASH_SIZE_PTR: *const u16 = 0x1FFF_F7CC as _;
}
#[cfg(feature = "stm32f1")]
mod pointers {
pub const DEVICE_ID_PTR: *const u8 = 0x1FFF_F7E8 as _;
pub const FLASH_SIZE_PTR: *const u16 = 0x1FFF_F7E0 as _;
}
#[cfg(any(feature = "stm32f2", feature = "stm32f4"))]
mod pointers {
pub const DEVICE_ID_PTR: *const u8 = 0x1FFF_7A10 as _;
pub const FLASH_SIZE_PTR: *const u16 = 0x1FFF_7A22 as _;
}
#[cfg(any(feature = "stm32f72x", feature = "stm32f73x"))]
mod pointers {
pub const DEVICE_ID_PTR: *const u8 = 0x1FF0_7A10 as _;
pub const FLASH_SIZE_PTR: *const u16 = 0x1FF0_7A22 as _;
}
#[cfg(any(feature = "stm32g0", feature = "stm32l4", feature = "stm32wb5x"))]
mod pointers {
pub const DEVICE_ID_PTR: *const u8 = 0x1FFF_7590 as _;
pub const FLASH_SIZE_PTR: *const u16 = 0x1FFF_75E0 as _;
}
#[cfg(feature = "stm32l0")]
mod pointers {
pub const DEVICE_ID_PTR: *const u8 = 0x1FF8_0050 as _;
pub const FLASH_SIZE_PTR: *const u16 = 0x1FF8_007C as _;
}
use pointers::*;
pub fn device_id() -> &'static [u8; 12] {
unsafe { &*DEVICE_ID_PTR.cast::<[u8; 12]>() }
}
pub fn device_id_hex() -> &'static str {
static mut DEVICE_ID_STR: [u8; 24] = [0; 24];
unsafe {
if DEVICE_ID_STR.as_ptr().read_volatile() == 0 {
interrupt::free(|_| {
let hex = b"0123456789abcdef";
for (i, b) in device_id().iter().enumerate() {
let lo = b & 0xf;
let hi = (b >> 4) & 0xfu8;
DEVICE_ID_STR[i*2] = hex[hi as usize];
DEVICE_ID_STR[i*2+1] = hex[lo as usize];
}
});
}
core::str::from_utf8_unchecked(&DEVICE_ID_STR)
}
}
pub fn flash_size_kb() -> u16 {
unsafe { *FLASH_SIZE_PTR }
}