embassy_nrf/ppi/
ppi.rs

1use super::{Channel, ConfigurableChannel, Event, Ppi, Task};
2use crate::{pac, Peri};
3
4impl<'d> Task<'d> {
5    fn reg_val(&self) -> u32 {
6        self.0.as_ptr() as _
7    }
8}
9impl<'d> Event<'d> {
10    fn reg_val(&self) -> u32 {
11        self.0.as_ptr() as _
12    }
13}
14
15pub(crate) fn regs() -> pac::ppi::Ppi {
16    pac::PPI
17}
18
19#[cfg(not(feature = "_nrf51"))] // Not for nrf51 because of the fork task
20impl<'d, C: super::StaticChannel> Ppi<'d, C, 0, 1> {
21    /// Configure PPI channel to trigger `task`.
22    pub fn new_zero_to_one(ch: Peri<'d, C>, task: Task) -> Self {
23        let r = regs();
24        let n = ch.number();
25        r.fork(n).tep().write_value(task.reg_val());
26
27        Self { ch }
28    }
29}
30
31impl<'d, C: ConfigurableChannel> Ppi<'d, C, 1, 1> {
32    /// Configure PPI channel to trigger `task` on `event`.
33    pub fn new_one_to_one(ch: Peri<'d, C>, event: Event<'d>, task: Task<'d>) -> Self {
34        let r = regs();
35        let n = ch.number();
36        r.ch(n).eep().write_value(event.reg_val());
37        r.ch(n).tep().write_value(task.reg_val());
38
39        Self { ch }
40    }
41}
42
43#[cfg(not(feature = "_nrf51"))] // Not for nrf51 because of the fork task
44impl<'d, C: ConfigurableChannel> Ppi<'d, C, 1, 2> {
45    /// Configure PPI channel to trigger both `task1` and `task2` on `event`.
46    pub fn new_one_to_two(ch: Peri<'d, C>, event: Event<'d>, task1: Task<'d>, task2: Task<'d>) -> Self {
47        let r = regs();
48        let n = ch.number();
49        r.ch(n).eep().write_value(event.reg_val());
50        r.ch(n).tep().write_value(task1.reg_val());
51        r.fork(n).tep().write_value(task2.reg_val());
52
53        Self { ch }
54    }
55}
56
57impl<'d, C: Channel, const EVENT_COUNT: usize, const TASK_COUNT: usize> Ppi<'d, C, EVENT_COUNT, TASK_COUNT> {
58    /// Enables the channel.
59    pub fn enable(&mut self) {
60        let n = self.ch.number();
61        regs().chenset().write(|w| w.set_ch(n, true));
62    }
63
64    /// Disables the channel.
65    pub fn disable(&mut self) {
66        let n = self.ch.number();
67        regs().chenclr().write(|w| w.set_ch(n, true));
68    }
69}
70
71impl<'d, C: Channel, const EVENT_COUNT: usize, const TASK_COUNT: usize> Drop for Ppi<'d, C, EVENT_COUNT, TASK_COUNT> {
72    fn drop(&mut self) {
73        self.disable();
74
75        let r = regs();
76        let n = self.ch.number();
77        r.ch(n).eep().write_value(0);
78        r.ch(n).tep().write_value(0);
79        #[cfg(not(feature = "_nrf51"))]
80        r.fork(n).tep().write_value(0);
81    }
82}
embassy_nrf/ppi/ppi.rs

embassy_nrf/ppi/
ppi.rs
