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use cast::u32;
use nrf51::TIMER0;
use hal::blocking::delay::{DelayMs, DelayUs};
pub struct Delay {
timer: TIMER0,
}
impl Delay {
pub fn new(timer: TIMER0) -> Self {
timer.tasks_stop.write(|w| unsafe { w.bits(1) });
timer.bitmode.write(|w| unsafe { w.bits(2) });
timer.prescaler.write(|w| unsafe { w.bits(4) });
Delay { timer }
}
pub fn free(self) -> TIMER0 {
self.timer
}
}
impl DelayMs<u32> for Delay {
fn delay_ms(&mut self, ms: u32) {
self.delay_us(ms * 1_000);
}
}
impl DelayMs<u16> for Delay {
fn delay_ms(&mut self, ms: u16) {
self.delay_ms(u32(ms));
}
}
impl DelayMs<u8> for Delay {
fn delay_ms(&mut self, ms: u8) {
self.delay_ms(u32(ms));
}
}
impl DelayUs<u32> for Delay {
fn delay_us(&mut self, us: u32) {
self.timer.events_compare[0].write(|w| unsafe { w.bits(0) });
self.timer.cc[0].write(|w| unsafe { w.bits(us) });
self.timer.tasks_clear.write(|w| unsafe { w.bits(1) });
self.timer.tasks_start.write(|w| unsafe { w.bits(1) });
while self.timer.events_compare[0].read().bits() == 0 {}
self.timer.tasks_stop.write(|w| unsafe { w.bits(1) });
}
}
impl DelayUs<u16> for Delay {
fn delay_us(&mut self, us: u16) {
self.delay_us(u32(us))
}
}
impl DelayUs<u8> for Delay {
fn delay_us(&mut self, us: u8) {
self.delay_us(u32(us))
}
}