Module imxrt_hal::ccm::perclk_clk

PERCLK clock.

The PERCLK clock controls GPT and PIT timers.

Example

Use the CCM to set the PERCLK clock selection and frequency. After this snippet runs, the PERCLK clock runs at 8MHz. To safely perform this switch, disable all clock gates to the PIT and GPT peripherals.

use imxrt_ral as ral;
use imxrt_hal as hal;

use hal::ccm::{self, clock_gate};

let mut ccm = unsafe { ral::ccm::CCM::instance() };

clock_gate::PERCLK_CLOCK_GATES
    .iter()
    .for_each(|clock_gate| clock_gate.set(&mut ccm, clock_gate::OFF));

// 24MHz...
ccm::perclk_clk::set_selection(&mut ccm, ccm::perclk_clk::Selection::Oscillator);
// ...divided by 3.
ccm::perclk_clk::set_divider(&mut ccm, 3);

clock_gate::PERCLK_CLOCK_GATES
    .iter()
    .for_each(|clock_gate| clock_gate.set(&mut ccm, clock_gate::ON));

Enums

• Selection
  PERCLK clock selection.

Constants

• MAX_DIVIDER
  The largest PERCLK divider.
• MIN_DIVIDER
  The smallest PERCLK divider.

Functions

• divider
  Returns the PERCLK clock divider.
• selection
  Returns the PERCLK clock selection.
• set_divider
  Set the PERCLK clock divider.
• set_selection
  Set the PERCLK clock selection.