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99 lines
1.7 KiB
Rust
99 lines
1.7 KiB
Rust
//! Fake multi-core PAC
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#![no_std]
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use core::{
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cmp::Ordering,
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ops::{Add, Sub},
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};
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use bare_metal::Nr;
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use rtic::{Fraction, Monotonic, MultiCore};
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// both cores have the exact same interrupts
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pub use Interrupt_0 as Interrupt_1;
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// Fake priority bits
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pub const NVIC_PRIO_BITS: u8 = 3;
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pub fn xpend(_core: u8, _interrupt: impl Nr) {}
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/// Fake monotonic timer
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pub struct MT;
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impl Monotonic for MT {
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type Instant = Instant;
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fn ratio() -> Fraction {
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Fraction {
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numerator: 1,
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denominator: 1,
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}
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}
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unsafe fn reset() {
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(0xE0001004 as *mut u32).write_volatile(0)
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}
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fn now() -> Instant {
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unsafe { Instant((0xE0001004 as *const u32).read_volatile() as i32) }
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}
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fn zero() -> Instant {
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Instant(0)
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}
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}
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impl MultiCore for MT {}
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#[derive(Clone, Copy, Eq, PartialEq)]
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pub struct Instant(i32);
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impl Add<u32> for Instant {
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type Output = Instant;
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fn add(self, rhs: u32) -> Self {
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Instant(self.0.wrapping_add(rhs as i32))
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}
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}
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impl Sub for Instant {
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type Output = u32;
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fn sub(self, rhs: Self) -> u32 {
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self.0.checked_sub(rhs.0).unwrap() as u32
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}
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}
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impl Ord for Instant {
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fn cmp(&self, rhs: &Self) -> Ordering {
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self.0.wrapping_sub(rhs.0).cmp(&0)
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}
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}
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impl PartialOrd for Instant {
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fn partial_cmp(&self, rhs: &Self) -> Option<Ordering> {
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Some(self.cmp(rhs))
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}
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}
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// Fake interrupts
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#[allow(non_camel_case_types)]
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#[derive(Clone, Copy)]
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#[repr(u8)]
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pub enum Interrupt_0 {
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I0 = 0,
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I1 = 1,
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I2 = 2,
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I3 = 3,
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I4 = 4,
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I5 = 5,
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I6 = 6,
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I7 = 7,
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}
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unsafe impl Nr for Interrupt_0 {
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fn nr(&self) -> u8 {
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*self as u8
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}
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}
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