Function esp_idf_hal::sys::ets_get_cpu_frequency

pub unsafe extern "C" fn ets_get_cpu_frequency() -> u32

@brief Get the real CPU ticks per us to the ets. This function do not return real CPU ticks per us, just the record in ets. It can be used to check with the real CPU frequency.

@param None

@return uint32_t : CPU ticks per us record in ets.