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Revert "Own the sequence buffer"

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This reverts commit 482389a691.
This commit is contained in:
huntc
2022-01-30 16:21:23 +11:00
parent 482389a691
commit 1c67bd4643
4 changed files with 68 additions and 108 deletions
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22
examples/nrf/src/bin/pwm_sequence.rs
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@ -8,13 +8,14 @@ use defmt::*;
use embassy::executor::Spawner;
use embassy::time::{Duration, Timer};
use embassy_nrf::gpio::NoPin;
use embassy_nrf::pwm::{
Config, Prescaler, Sequence, SequenceConfig, SequenceMode, SequencePwm, EMPTY_SEQ,
};
use embassy_nrf::pwm::{Config, Prescaler, Sequence, SequenceConfig, SequenceMode, SequencePwm};
use embassy_nrf::Peripherals;
#[embassy::main]
async fn main(_spawner: Spawner, p: Peripherals) {
let mut seq_words_1: [u16; 5] = [1000, 250, 100, 50, 0];
let mut seq_words_2: [u16; 5] = [0, 50, 100, 250, 1000];
let mut config = Config::default();
config.prescaler = Prescaler::Div128;
// 1 period is 1000 * (128/16mhz = 0.000008s = 0.008ms) = 8us
@ -25,20 +26,25 @@ async fn main(_spawner: Spawner, p: Peripherals) {
seq_config.refresh = 624;
// thus our sequence takes 5 * 5000ms or 25 seconds
let seq_1 = Sequence::new([1000, 250, 100, 50, 0], seq_config.clone());
let seq_2 = Sequence::new([0, 50, 100, 250, 1000], seq_config);
let mut pwm = unwrap!(SequencePwm::new(
p.PWM0, p.P0_13, NoPin, NoPin, NoPin, config,
));
unwrap!(pwm.start(seq_1, EMPTY_SEQ, SequenceMode::Times(1)));
let _ = pwm.start(
Sequence::new(&mut seq_words_1, seq_config.clone()),
None,
SequenceMode::Infinite,
);
info!("pwm started!");
Timer::after(Duration::from_millis(20000)).await;
info!("pwm starting with another sequence!");
unwrap!(pwm.start(seq_2, EMPTY_SEQ, SequenceMode::Times(1)));
let _ = pwm.start(
Sequence::new(&mut seq_words_2, seq_config),
None,
SequenceMode::Infinite,
);
// we can abort a sequence if we need to before its complete with pwm.stop()
// or stop is also implicitly called when the pwm peripheral is dropped