You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: pwm.rs
    path of file: ./repos/embassy/examples/stm32h7/src/bin
    
    the code of the file until where you have to start completion: #![no_std]
#![no_main]

use defmt::*;
use embassy_executor::Spawner;
use embassy_stm32::gpio::OutputType;
use embassy_stm32::time::khz;
use embassy_stm32::timer::simple_pwm::{PwmPin, SimplePwm};
use embassy_stm32::timer::Channel;
use embassy_stm32::Config;
use embassy_time::Timer;
use {defmt_rtt as _, panic_probe as _};

#[embassy_executor::main]
async fn main(_spawner: Spawner) {
    let mut config
    
async fn main(_spawner: Spawner) {
    let mut config = Config::default();
    {
        use embassy_stm32::rcc::*;
        config.rcc.hsi = Some(HSIPrescaler::DIV1);
        config.rcc.csi = true;
        config.rcc.pll1 = Some(Pll {
            source: PllSource::HSI,
            prediv: PllPreDiv::DIV4,
            mul: PllMul::MUL50,
            divp: Some(PllDiv::DIV2),
            divq: None,
            divr: None,
        });
        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
        config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
        config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
        config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
        config.rcc.apb3_pre = APBPrescaler::DIV2; // 100 Mhz
        config.rcc.apb4_pre = APBPrescaler::DIV2; // 100 Mhz
        config.rcc.voltage_scale = VoltageScale::Scale1;
    }
    let p = embassy_stm32::init(config);
    info!("Hello World!");

    let ch1 = PwmPin::new_ch1(p.PA6, OutputType::PushPull);
    let mut pwm = SimplePwm::new(p.TIM3, Some(ch1), None, None, None, khz(10), Default::default());
    let max = pwm.get_max_duty();
    pwm.enable(Channel::Ch1);

    info!("PWM initialized");
    info!("PWM max duty {}", max);

    loop {
        pwm.set_duty(Channel::Ch1, 0);
        Timer::after_millis(300).await;
        pwm.set_duty(Channel::Ch1, max / 4);
        Timer::after_millis(300).await;
        pwm.set_duty(Channel::Ch1, max / 2);
        Timer::after_millis(300).await;
        pwm.set_duty(Channel::Ch1, max - 1);
        Timer::after_millis(300).await;
    }
}