Expose PWM

embassy-nrf/src/pwm.rs

@@ -321,7 +321,7 @@ impl<'s> Sequence<'s> {
 /// is used.
 #[non_exhaustive]
 pub struct Sequences<'d, 's, T: Instance> {
-    _pwm: &'s mut SequencePwm<'d, T>,
+    pub pwm: &'s mut SequencePwm<'d, T>,
     sequence0: Sequence<'s>,
     sequence1: Option<Sequence<'s>>,
 }
@@ -333,7 +333,7 @@ impl<'d, 's, T: Instance> Sequences<'d, 's, T> {
         sequence1: Option<Sequence<'s>>,
     ) -> Self {
         Sequences {
-            _pwm: pwm,
+            pwm,
             sequence0,
             sequence1,
         }

examples/nrf/src/bin/pwm_sequence_ppi.rs

@@ -11,12 +11,14 @@ use embassy::executor::Spawner;
 use embassy_nrf::gpio::{Input, NoPin, Pull};
 use embassy_nrf::gpiote::{InputChannel, InputChannelPolarity};
 use embassy_nrf::ppi::Ppi;
-use embassy_nrf::pwm::{Config, Prescaler, Sequence, SequenceConfig, SequenceMode, SequencePwm};
+use embassy_nrf::pwm::{
+    Config, Prescaler, Sequence, SequenceConfig, SequenceMode, SequencePwm, Sequences,
+};
 use embassy_nrf::Peripherals;
 
 #[embassy::main]
 async fn main(_spawner: Spawner, p: Peripherals) {
-    let mut seq_words: [u16; 5] = [1000, 250, 100, 50, 0];
+    let seq_words: [u16; 5] = [1000, 250, 100, 50, 0];
 
     let mut config = Config::default();
     config.prescaler = Prescaler::Div128;
@@ -31,11 +33,10 @@ async fn main(_spawner: Spawner, p: Peripherals) {
         p.PWM0, p.P0_13, NoPin, NoPin, NoPin, config,
     ));
 
-    let _ = pwm.start(
-        Sequence::new(&mut seq_words, seq_config),
-        None,
-        SequenceMode::Infinite,
-    );
+    let sequence0 = Sequence::new(&seq_words, seq_config);
+    let sequences = Sequences::new(&mut pwm, sequence0, None);
+    unwrap!(sequences.start(SequenceMode::Infinite));
+
     // pwm.stop() deconfigures pins, and then the task_start_seq0 task cant work
     // so its going to have to start running in order load the configuration
 
@@ -53,8 +54,8 @@ async fn main(_spawner: Spawner, p: Peripherals) {
 
     // messing with the pwm tasks is ill advised
     // Times::Ininite and Times even are seq0, Times odd is seq1
-    let start = unsafe { pwm.task_start_seq0() };
-    let stop = unsafe { pwm.task_stop() };
+    let start = unsafe { sequences.pwm.task_start_seq0() };
+    let stop = unsafe { sequences.pwm.task_stop() };
 
     let mut ppi = Ppi::new_one_to_one(p.PPI_CH1, button1.event_in(), start);
     ppi.enable();

examples/nrf/src/bin/pwm_sequence_ws2812b.rs

@@ -7,11 +7,12 @@ mod example_common;
 use defmt::*;
 use embassy::executor::Spawner;
 use embassy::time::{Duration, Timer};
+use embassy::util::Forever;
 use embassy_nrf::gpio::NoPin;
 use embassy_nrf::pwm::{
     Config, Prescaler, Sequence, SequenceConfig, SequenceLoad, SequenceMode, SequencePwm, Sequences,
 };
-use embassy_nrf::Peripherals;
+use embassy_nrf::{peripherals, Peripherals};
 
 // WS2812B LED light demonstration. Drives just one light.
 // The following reference on WS2812B may be of use:
@@ -26,6 +27,8 @@ const T1H: u16 = 0x8000 | 13; // Duty = 13/20 ticks (0.8us/1.25us) for a 1
 const T0H: u16 = 0x8000 | 7; // Duty 7/20 ticks (0.4us/1.25us) for a 0
 const RES: u16 = 0x8000;
 
+static PWM: Forever<SequencePwm<peripherals::PWM0>> = Forever::new();
+
 // Provides data to a WS2812b (Neopixel) LED and makes it go blue. The data
 // line is assumed to be P1_05.
 #[embassy::main]
@@ -34,10 +37,12 @@ async fn main(_spawner: Spawner, p: Peripherals) {
     config.sequence_load = SequenceLoad::Common;
     config.prescaler = Prescaler::Div1;
     config.max_duty = 20; // 1.25us (1s / 16Mhz * 20)
-    let mut pwm = unwrap!(SequencePwm::new(
+    let pwm = unwrap!(SequencePwm::new(
         p.PWM0, p.P1_05, NoPin, NoPin, NoPin, config,
     ));
 
+    let mut pwm = PWM.put(pwm);
+
     // Declare the bits of 24 bits in a buffer we'll be
     // mutating later.
     let mut seq_words = [