let mut config = embassy_stm32::Config::default();

        {
            use embassy_stm32::rcc::*;
            config.rcc.hse = Some(Hse {
                freq: Hertz(32_000_000),
                mode: HseMode::Oscillator,
                prescaler: HsePrescaler::DIV1,
            });
            config.rcc.mux = ClockSrc::PLL1_R;
            config.rcc.pll = Some(Pll {
                source: PLLSource::HSE,
                prediv: PllPreDiv::DIV2,
                mul: PllMul::MUL6,
                divp: None,
                divq: Some(PllQDiv::DIV2), // PLL1_Q clock (32 / 2 * 6 / 2), used for RNG
                divr: Some(PllRDiv::DIV2), // sysclk 48Mhz clock (32 / 2 * 6 / 2)
            });
        }