Function highest_freq_in 

pub const fn highest_freq_in(
    range: RangeInclusive<Rate<u32, 1000, 1>>,
) -> Frequency

Available on crate feature i2c only.

Returns the highest I2C frequency available on the MCU that fits into the requested range.

Examples

Assuming the MCU is only able to do 100 kHz and 400 kHz (not 250 kHz):

let freq = const { highest_freq_in(Kilohertz::kHz(100)..=Kilohertz::kHz(250)) };
assert_eq!(freq, hal::i2c::controller::Frequency::_100k);

Panics

This function is only intended to be used in a const context. It panics if no suitable frequency can be found.