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Diffstat (limited to 'examples/nrf/src/bin/pwm_sequence.rs')
-rw-r--r--examples/nrf/src/bin/pwm_sequence.rs21
1 files changed, 9 insertions, 12 deletions
diff --git a/examples/nrf/src/bin/pwm_sequence.rs b/examples/nrf/src/bin/pwm_sequence.rs
index 56c865d1c..f06ea0b19 100644
--- a/examples/nrf/src/bin/pwm_sequence.rs
+++ b/examples/nrf/src/bin/pwm_sequence.rs
@@ -8,34 +8,31 @@ use defmt::*;
8use embassy::executor::Spawner; 8use embassy::executor::Spawner;
9use embassy::time::{Duration, Timer}; 9use embassy::time::{Duration, Timer};
10use embassy_nrf::gpio::NoPin; 10use embassy_nrf::gpio::NoPin;
11use embassy_nrf::pwm::{Prescaler, SequenceConfig, SequenceMode, SequencePwm}; 11use embassy_nrf::pwm::{
12 Config, Prescaler, SequenceConfig, SequencePwm, SingleSequenceMode, SingleSequencer,
13};
12use embassy_nrf::Peripherals; 14use embassy_nrf::Peripherals;
13 15
14#[embassy::main] 16#[embassy::main]
15async fn main(_spawner: Spawner, p: Peripherals) { 17async fn main(_spawner: Spawner, p: Peripherals) {
16 let seq_values_1: [u16; 5] = [1000, 250, 100, 50, 0]; 18 let seq_words: [u16; 5] = [1000, 250, 100, 50, 0];
17 let seq_values_2: [u16; 5] = [0, 50, 100, 250, 1000];
18 19
19 let mut config = SequenceConfig::default(); 20 let mut config = Config::default();
20 config.prescaler = Prescaler::Div128; 21 config.prescaler = Prescaler::Div128;
21 // 1 period is 1000 * (128/16mhz = 0.000008s = 0.008ms) = 8us 22 // 1 period is 1000 * (128/16mhz = 0.000008s = 0.008ms) = 8us
22 // but say we want to hold the value for 5000ms 23 // but say we want to hold the value for 5000ms
23 // so we want to repeat our value as many times as necessary until 5000ms passes 24 // so we want to repeat our value as many times as necessary until 5000ms passes
24 // want 5000/8 = 625 periods total to occur, so 624 (we get the one period for free remember) 25 // want 5000/8 = 625 periods total to occur, so 624 (we get the one period for free remember)
25 config.refresh = 624; 26 let mut seq_config = SequenceConfig::default();
27 seq_config.refresh = 624;
26 // thus our sequence takes 5 * 5000ms or 25 seconds 28 // thus our sequence takes 5 * 5000ms or 25 seconds
27 29
28 let mut pwm = unwrap!(SequencePwm::new( 30 let mut pwm = unwrap!(SequencePwm::new(
29 p.PWM0, p.P0_13, NoPin, NoPin, NoPin, config, 31 p.PWM0, p.P0_13, NoPin, NoPin, NoPin, config,
30 )); 32 ));
31 let _ = pwm.start(&seq_values_1, SequenceMode::Infinite);
32 33
33 info!("pwm started!"); 34 let sequencer = SingleSequencer::new(&mut pwm, &seq_words, seq_config);
34 35 unwrap!(sequencer.start(SingleSequenceMode::Times(1)));
35 Timer::after(Duration::from_millis(20000)).await;
36 info!("pwm starting with another sequence!");
37
38 let _ = pwm.start(&seq_values_2, SequenceMode::Infinite);
39 36
40 // we can abort a sequence if we need to before its complete with pwm.stop() 37 // we can abort a sequence if we need to before its complete with pwm.stop()
41 // or stop is also implicitly called when the pwm peripheral is dropped 38 // or stop is also implicitly called when the pwm peripheral is dropped