* Example: This config is for firmware that works on G4 and H7. It uses the same peripheral set for both. Note how the H7 config is much more complex.

```rust
let pll_src = PllSrc::Hse(16_000_000);
if #[cfg(feature = "h7")] {
    let clock_cfg = Clocks {
        // Config for H723 at 520Mhz, or H743 at 400Mhz.
        pll_src,
        pll1: PllCfg {
            divm: 8, // To compensate with 16Mhz HSE instead of 64Mhz HSI
            // PLLQ for Spi1 and CAN clocks. We set it to 80Mhz, which is convenient for
            // CAN timings. For example, setting to 100Mhz or 120Mhz doesn't allow 5Mbps,
            // among other speeds.
            pllq_en: true,
            divq: 10, // Sets to 80Mhz, assuming divn = 400.
            ..Default::default()
        },
        // We use PLL2P as the (default) ADC clock. Keep the speed under 80Mhz.
        pll2: PllCfg {
            divm: 8, // To compensate with 16Mhz HSE instead of 64Mhz HSI
            divn: 80,
            divp: 2, // Sets ADC clock to 80Mhz (400Mhz sysclock)
            ..Default::default()
        },
        hsi48_on: true,
        ..Default::default()
    };
} else {
    let clock_cfg = Clocks {
        input_src: InputSrc::Pll(pll_src),
        hsi48_on: true,
        ..Default::default()
    };
}
```