NaxdyOrg/embassy
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Introduces a Sequences struct

Browse source
This commit is contained in:
huntc 2022-02-04 13:04:55 +11:00
parent bc7266394d
commit 1af6b23f97
2 changed files with 161 additions and 152 deletions
examples/nrf/src/bin
pwm_sequence_ws2812b.rs

39
examples/nrf/src/bin/pwm_sequence_ws2812b.rs
View file

@ -9,7 +9,7 @@ use embassy::executor::Spawner;
use embassy::time::{Duration, Timer};
use embassy_nrf::gpio::NoPin;
use embassy_nrf::pwm::{
Config, Prescaler, Sequence, SequenceConfig, SequenceLoad, SequenceMode, SequencePwm,
Config, Prescaler, Sequence, SequenceConfig, SequenceLoad, SequenceMode, SequencePwm, Sequences,
};
use embassy_nrf::Peripherals;
@ -30,19 +30,6 @@ const RES: u16 = 0x8000;
// line is assumed to be P1_05.
#[embassy::main]
async fn main(_spawner: Spawner, p: Peripherals) {
// Declare the bits of 24 bits
let mut color_seq_words = [
T0H, T0H, T0H, T0H, T0H, T0H, T0H, T0H, // G
T0H, T0H, T0H, T0H, T0H, T0H, T0H, T0H, // R
T1H, T1H, T1H, T1H, T1H, T1H, T1H, T1H, // B
];
let color_seq = Sequence::new(&mut color_seq_words, SequenceConfig::default());
let mut reset_seq_words = [RES; 1];
let mut reset_seq_config = SequenceConfig::default();
reset_seq_config.end_delay = 799; // 50us (20 ticks * 40) - 1 tick because we've already got one RES;
let reset_seq = Sequence::new(&mut reset_seq_words, reset_seq_config);
let mut config = Config::default();
config.sequence_load = SequenceLoad::Common;
config.prescaler = Prescaler::Div1;
@ -51,18 +38,24 @@ async fn main(_spawner: Spawner, p: Peripherals) {
p.PWM0, p.P1_05, NoPin, NoPin, NoPin, config,
));
unwrap!(pwm.start(color_seq, Some(reset_seq), SequenceMode::Times(2)));
Timer::after(Duration::from_millis(1000)).await;
// Declare the bits of 24 bits in a buffer we'll be
// mutating later.
let mut seq_words = [
T0H, T0H, T0H, T0H, T0H, T0H, T0H, T0H, // G
T0H, T0H, T0H, T0H, T0H, T0H, T0H, T0H, // R
T1H, T1H, T1H, T1H, T1H, T1H, T1H, T1H, // B
RES,
];
let mut seq_config = SequenceConfig::default();
seq_config.end_delay = 799; // 50us (20 ticks * 40) - 1 tick because we've already got one RES;
let mut color_bit = 16;
let mut bit_value = T0H;
loop {
if let (Some(color_seq), Some(reset_seq)) = pwm.stop() {
color_seq.words[color_bit] = bit_value;
unwrap!(pwm.start(color_seq, Some(reset_seq), SequenceMode::Times(2)));
}
let sequence0 = Sequence::new(&seq_words, seq_config.clone());
let sequences = Sequences::new(&mut pwm, sequence0, None);
unwrap!(sequences.start(SequenceMode::Times(2)));
Timer::after(Duration::from_millis(50)).await;
@ -79,5 +72,9 @@ async fn main(_spawner: Spawner, p: Peripherals) {
color_bit -= 1;
}
}
drop(sequences);
seq_words[color_bit] = bit_value;
}
}