feat: dim led to 1% brightness

src/main.rs

@@ -4,6 +4,7 @@
 use esp_hal::clock::ClockControl;
 use esp_hal::delay::Delay;
 use esp_hal::gpio::IO;
+use esp_hal::ledc::{channel, timer, LSGlobalClkSource, LEDC};
 use esp_hal::peripherals::Peripherals;
 use esp_hal::prelude::*;
 
@@ -15,30 +16,70 @@ fn main() -> ! {
     let sys = p.SYSTEM.split();
     let clocks = ClockControl::boot_defaults(sys.clock_control).freeze();
 
+    let mut ledc = LEDC::new(p.LEDC, &clocks);
+    ledc.set_global_slow_clock(LSGlobalClkSource::APBClk);
+
+    let mut timer = ledc.get_timer(timer::Number::Timer0);
+    timer
+        .configure(timer::config::Config {
+            clock_source: timer::LSClockSource::APBClk,
+            duty: timer::config::Duty::Duty8Bit,
+            frequency: 24.kHz(),
+        })
+        .unwrap();
+
     let io = IO::new(p.GPIO, p.IO_MUX);
 
-    let mut r = io.pins.gpio5.into_push_pull_output();
-    let mut g = io.pins.gpio6.into_push_pull_output();
-    let mut b = io.pins.gpio7.into_push_pull_output();
+    let mut r = ledc.get_channel(
+        channel::Number::Channel0,
+        io.pins.gpio5.into_push_pull_output(),
+    );
+    let mut g = ledc.get_channel(
+        channel::Number::Channel1,
+        io.pins.gpio6.into_push_pull_output(),
+    );
+    let mut b = ledc.get_channel(
+        channel::Number::Channel2,
+        io.pins.gpio7.into_push_pull_output(),
+    );
+
+    r.configure(channel::config::Config {
+        duty_pct: 0,
+        pin_config: channel::config::PinConfig::PushPull,
+        timer: &timer,
+    })
+    .unwrap();
+    g.configure(channel::config::Config {
+        duty_pct: 0,
+        pin_config: channel::config::PinConfig::PushPull,
+        timer: &timer,
+    })
+    .unwrap();
+    b.configure(channel::config::Config {
+        duty_pct: 0,
+        pin_config: channel::config::PinConfig::PushPull,
+        timer: &timer,
+    })
+    .unwrap();
 
     let _btn = io.pins.gpio9.into_pull_up_input();
 
     let delay = Delay::new(&clocks);
 
     for [r_state, g_state, b_state] in [
-        [true, false, false],
-        [true, true, false],
-        [false, true, false],
-        [false, true, true],
-        [false, false, true],
-        [true, false, true],
+        [1, 0, 0],
+        [1, 1, 0],
+        [0, 1, 0],
+        [0, 1, 1],
+        [0, 0, 1],
+        [1, 0, 1],
     ]
     .iter()
     .cycle()
     {
-        r.set_state(*r_state);
-        g.set_state(*g_state);
-        b.set_state(*b_state);
+        let _ = r.set_duty(*r_state);
+        let _ = g.set_duty(*g_state);
+        let _ = b.set_duty(*b_state);
 
         delay.delay_millis(200u32);
     }