Enum UsbSrc

pub enum UsbSrc {
    Hsi48(Hsi48Config),
    PllQ,
    HSE,
}

Sets the source for the 48MHz clock to the USB peripheral.

Variants

Hsi48(Hsi48Config)

Use the High Speed Internal Oscillator. The CRS must be used to calibrate the oscillator to comply with the USB specification for oscillator tolerance.

PllQ

Use the PLLQ output. The PLL must be configured to output a 48MHz clock. The PLL needs to be using the HSE source to comply with the USB specification for oscillator tolerance.

HSE

Use the HSE source directly. The HSE must be a 48MHz source. The HSE source must comply with the USB specification for oscillator tolerance.