Help Needed with LEDC Breathing Light on ESP32-C3

[khsdfyd]

Help Needed with LEDC Breathing Light on ESP32-C3
Dear [Recipient's Name],

I hope this message finds you well.

I am encountering an issue while attempting to create a breathing light effect on my ESP32-C3 development board using the LEDC peripheral. The on-board LED is connected to GPIO12, and I’ve been trying to implement the effect using the LEDC module. However, I am facing several challenges that I hope you can help me with.

The Problem
I am unsure how to correctly create a timer for LEDC. Specifically, the following error arises during compilation:

error[E0382]: borrow of moved value: `peripherals.LEDC`
  --> src/main.rs:22:57
   |
19 |     let mut ledc_1 = ledc::Ledc::new(peripherals.LEDC);
   |                                      ---------------- value moved here
...
22 |     let mut ledc_timer1 = timer::Timer::<LowSpeed>::new(&peripherals.LEDC, timer::Number::Timer1);
   |                                                         ^^^^^^^^^^^^^^^^^ value borrowed here after move
   |
   = note: move occurs because `peripherals.LEDC` has type `esp_hal::peripherals::LEDC`, which does not implement the `Copy` trait

This error indicates that peripherals.LEDC has been moved and cannot be borrowed later.

My Code
Here is the code I’m working with:

#![no_std]
#![no_main]

use esp_backtrace as _;
use esp_hal::{
    gpio::Io, ledc::{self, timer, LSGlobalClkSource, LowSpeed}, prelude::*
};

#[entry]
fn main() -> ! {
    #[allow(unused)]
    let peripherals = esp_hal::init(esp_hal::Config::default());

    esp_println::logger::init_logger_from_env();

    let io = Io::new(peripherals.GPIO, peripherals.IO_MUX);

    let mut ledc_1 = ledc::Ledc::new(peripherals.LEDC);
    ledc_1.set_global_slow_clock(LSGlobalClkSource::APBClk);
    
    let mut ledc_timer1 = timer::Timer::<LowSpeed>::new(&peripherals.LEDC, timer::Number::Timer1);
    ledc_timer1.configure(ledc::timer::config::Config{
        duty: timer::config::Duty::Duty1Bit,
        clock_source: timer::LSClockSource::APBClk,
        frequency: 50.kHz()
    }).unwrap();

    let mut ledc_channel1 = ledc::channel::Channel::<LowSpeed, _>::new(ledc::channel::Number::Channel1, io.pins.gpio12);
    ledc_channel1.configure(ledc::channel::config::Config { 
        timer: &ledc_timer1, 
        duty_pct: 20, 
        pin_config: ledc::channel::config::PinConfig::PushPull
    }).unwrap();

    loop {
        ledc_channel1.start_duty_fade(0, 100, 1000);
        while ledc_channel1.is_duty_fade_running() {}
        ledc_channel1.start_duty_fade(100, 0, 1000);
        while ledc_channel1.is_duty_fade_running() {}
    }
}

[bjoernQ]

This is your code changed to work (note I also used a different GPIO (3 instead of 12 in your code)

#![no_std]
#![no_main]

use esp_backtrace as _;
use esp_hal::{
    gpio::Io, ledc::{self, timer, LSGlobalClkSource, LowSpeed}, prelude::*
};

#[entry]
fn main() -> ! {
    #[allow(unused)]
    let peripherals = esp_hal::init(esp_hal::Config::default());

    esp_println::logger::init_logger_from_env();

    let io = Io::new(peripherals.GPIO, peripherals.IO_MUX);

    let mut ledc_1 = ledc::Ledc::new(peripherals.LEDC);
    ledc_1.set_global_slow_clock(LSGlobalClkSource::APBClk);
 
    // you shouldn't try to construct a new timer via `new` but get it from the driver   
    let mut ledc_timer1 = ledc_1.get_timer::<LowSpeed>(timer::Number::Timer1);

    ledc_timer1.configure(ledc::timer::config::Config{
        duty: timer::config::Duty::Duty5Bit, // 1 bit won't work here
        clock_source: timer::LSClockSource::APBClk,
        frequency: 24.kHz(), // 50.kHz() won't work for the duration you want
    }).unwrap();

    let mut ledc_channel1 = ledc::channel::Channel::<LowSpeed, _>::new(ledc::channel::Number::Channel1, io.pins.gpio3);
    ledc_channel1.configure(ledc::channel::config::Config { 
        timer: &ledc_timer1, 
        duty_pct: 10, 
        pin_config: ledc::channel::config::PinConfig::PushPull
    }).unwrap();

    loop {
        ledc_channel1.start_duty_fade(0, 100, 1000).unwrap();
        while ledc_channel1.is_duty_fade_running() {}
        ledc_channel1.start_duty_fade(100, 0, 1000).unwrap();
        while ledc_channel1.is_duty_fade_running() {}
    }
}

[khsdfyd]

is ture，