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use super::{Channel, ConfigurableChannel, Event, Ppi, Task};
use crate::{Peri, pac};
impl<'d> Task<'d> {
fn reg_val(&self) -> u32 {
self.0.as_ptr() as _
}
}
impl<'d> Event<'d> {
fn reg_val(&self) -> u32 {
self.0.as_ptr() as _
}
}
pub(crate) fn regs() -> pac::ppi::Ppi {
pac::PPI
}
#[cfg(not(feature = "_nrf51"))] // Not for nrf51 because of the fork task
impl<'d, C: super::StaticChannel> Ppi<'d, C, 0, 1> {
/// Configure PPI channel to trigger `task`.
pub fn new_zero_to_one(ch: Peri<'d, C>, task: Task) -> Self {
let r = regs();
let n = ch.number();
r.fork(n).tep().write_value(task.reg_val());
Self { ch }
}
}
impl<'d, C: ConfigurableChannel> Ppi<'d, C, 1, 1> {
/// Configure PPI channel to trigger `task` on `event`.
pub fn new_one_to_one(ch: Peri<'d, C>, event: Event<'d>, task: Task<'d>) -> Self {
let r = regs();
let n = ch.number();
r.ch(n).eep().write_value(event.reg_val());
r.ch(n).tep().write_value(task.reg_val());
Self { ch }
}
}
#[cfg(not(feature = "_nrf51"))] // Not for nrf51 because of the fork task
impl<'d, C: ConfigurableChannel> Ppi<'d, C, 1, 2> {
/// Configure PPI channel to trigger both `task1` and `task2` on `event`.
pub fn new_one_to_two(ch: Peri<'d, C>, event: Event<'d>, task1: Task<'d>, task2: Task<'d>) -> Self {
let r = regs();
let n = ch.number();
r.ch(n).eep().write_value(event.reg_val());
r.ch(n).tep().write_value(task1.reg_val());
r.fork(n).tep().write_value(task2.reg_val());
Self { ch }
}
}
impl<'d, C: Channel, const EVENT_COUNT: usize, const TASK_COUNT: usize> Ppi<'d, C, EVENT_COUNT, TASK_COUNT> {
/// Enables the channel.
pub fn enable(&mut self) {
let n = self.ch.number();
regs().chenset().write(|w| w.set_ch(n, true));
}
/// Disables the channel.
pub fn disable(&mut self) {
let n = self.ch.number();
regs().chenclr().write(|w| w.set_ch(n, true));
}
}
impl<C: Channel, const EVENT_COUNT: usize, const TASK_COUNT: usize> Ppi<'static, C, EVENT_COUNT, TASK_COUNT> {
/// Persist the channel's configuration for the rest of the program's lifetime. This method
/// should be preferred over [`core::mem::forget()`] because the `'static` bound prevents
/// accidental reuse of the underlying peripheral.
pub fn persist(self) {
core::mem::forget(self);
}
}
impl<'d, C: Channel, const EVENT_COUNT: usize, const TASK_COUNT: usize> Drop for Ppi<'d, C, EVENT_COUNT, TASK_COUNT> {
fn drop(&mut self) {
self.disable();
let r = regs();
let n = self.ch.number();
r.ch(n).eep().write_value(0);
r.ch(n).tep().write_value(0);
#[cfg(not(feature = "_nrf51"))]
r.fork(n).tep().write_value(0);
}
}
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