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
#![no_std]
pub extern crate embedded_hal;
pub use embedded_hal::digital::v2::*;
#[cfg(feature = "atsam4e16e")]
pub use atsam4e16e_pac as pac;
#[cfg(feature = "atsam4sd32c")]
pub use atsam4sd32c_pac as pac;
use cortex_m_rt::pre_init;
use core::mem;
pub mod clock;
pub mod delay;
pub mod gpio;
pub mod static_memory_controller;
pub mod serial;
pub mod time;
#[pre_init]
unsafe fn pre_init() {
pac::PMC::borrow_unchecked(|pmc| {
initialize_clock(pmc);
});
}
unsafe fn initialize_clock(pmc: &mut pac::PMC) {
#[cfg(feature = "disable_watchdog_timer")]
pac::WDT::borrow_unchecked(|wdt| {
wdt.mr.modify(|_, w| w.wddis().set_bit())
});
#[cfg(feature = "atsam4e")]
pac::EFC::borrow_unchecked(|efc| {
clock::init(pmc, efc);
});
#[cfg(feature = "atsam4s")]
pac::EFC0::borrow_unchecked(|efc0| {
pac::EFC1::borrow_unchecked(|efc1| {
clock::init(pmc, efc0, efc1);
});
});
}
unsafe trait BorrowUnchecked {
fn borrow_unchecked<T>(f: impl FnOnce(&mut Self) -> T) -> T;
}
unsafe impl BorrowUnchecked for pac::WDT {
fn borrow_unchecked<T>(f: impl FnOnce(&mut Self) -> T) -> T {
let mut p = unsafe { mem::transmute(()) };
f(&mut p)
}
}
unsafe impl BorrowUnchecked for pac::PMC {
fn borrow_unchecked<T>(f: impl FnOnce(&mut Self) -> T) -> T {
let mut p = unsafe { mem::transmute(()) };
f(&mut p)
}
}
#[cfg(feature = "atsam4e")]
unsafe impl BorrowUnchecked for pac::EFC {
fn borrow_unchecked<T>(f: impl FnOnce(&mut Self) -> T) -> T {
let mut p = unsafe { mem::transmute(()) };
f(&mut p)
}
}
#[cfg(feature = "atsam4s")]
unsafe impl BorrowUnchecked for pac::EFC0 {
fn borrow_unchecked<T>(f: impl FnOnce(&mut Self) -> T) -> T {
let mut p = unsafe { mem::transmute(()) };
f(&mut p)
}
}
#[cfg(feature = "atsam4s")]
unsafe impl BorrowUnchecked for pac::EFC1 {
fn borrow_unchecked<T>(f: impl FnOnce(&mut Self) -> T) -> T {
let mut p = unsafe { mem::transmute(()) };
f(&mut p)
}
}