Function stm32wlxx_hal::rcc::set_sysclk_hse

source · 
pub unsafe fn set_sysclk_hse(
    flash: &mut FLASH,
    pwr: &mut PWR,
    rcc: &mut RCC,
    vos: Vos,
    cs: &CriticalSection
)
Expand description

Set the sysclk to use the HSE 32MHz clock.

The VOS argument selects the voltage range which determines the clock prescaler:

  • 1.2V: 32MHz (div 1)
  • 1.0V: 16MHz (div 2)

Safety

  1. Peripherals must not be in-use before calling this function.
  2. Peripherals may need their prescalers adjusted for the new sysclk frequency.

Example

use stm32wlxx_hal::{
    pac,
    rcc::{set_sysclk_hse, Vos},
};

let mut dp: pac::Peripherals = pac::Peripherals::take().unwrap();
cortex_m::interrupt::free(|cs| unsafe {
    set_sysclk_hse(&mut dp.FLASH, &mut dp.PWR, &mut dp.RCC, Vos::V1_2, cs)
});