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
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
use cortex_m::peripheral::DWT;
use crate::rcc::Clocks;
#[derive(Clone, Copy)]
pub struct Bps(pub u32);
#[derive(Clone, Copy)]
pub struct Hertz(pub u32);
#[derive(Clone, Copy)]
pub struct KiloHertz(pub u32);
#[derive(Clone, Copy)]
pub struct MegaHertz(pub u32);
#[derive(PartialEq, PartialOrd, Clone, Copy)]
pub struct MilliSeconds(pub u32);
pub trait U32Ext {
fn bps(self) -> Bps;
fn hz(self) -> Hertz;
fn khz(self) -> KiloHertz;
fn mhz(self) -> MegaHertz;
fn ms(self) -> MilliSeconds;
}
impl U32Ext for u32 {
fn bps(self) -> Bps {
Bps(self)
}
fn hz(self) -> Hertz {
Hertz(self)
}
fn khz(self) -> KiloHertz {
KiloHertz(self)
}
fn mhz(self) -> MegaHertz {
MegaHertz(self)
}
fn ms(self) -> MilliSeconds {
MilliSeconds(self)
}
}
impl From<KiloHertz> for Hertz {
fn from(val: KiloHertz) -> Self {
Self(val.0 * 1_000)
}
}
impl From<MegaHertz> for Hertz {
fn from(val: MegaHertz) -> Self {
Self(val.0 * 1_000_000)
}
}
impl From<MegaHertz> for KiloHertz {
fn from(val: MegaHertz) -> Self {
Self(val.0 * 1_000)
}
}
#[derive(Clone, Copy)]
pub struct MonoTimer {
frequency: Hertz,
}
impl MonoTimer {
pub fn new(mut dwt: DWT, clocks: Clocks) -> Self {
dwt.enable_cycle_counter();
drop(dwt);
MonoTimer {
frequency: clocks.hclk(),
}
}
pub fn frequency(self) -> Hertz {
self.frequency
}
pub fn now(self) -> Instant {
Instant {
now: DWT::get_cycle_count(),
}
}
}
#[derive(Clone, Copy)]
pub struct Instant {
now: u32,
}
impl Instant {
pub fn elapsed(self) -> u32 {
DWT::get_cycle_count().wrapping_sub(self.now)
}
}