Module imxrt_hal::ccm

Clock control module.

Unlike other drivers in this package, this module only provides a thin layer over the imxrt-ral APIs. It’s fairly low level, but more discoverable than the registers and reference manual.

Overview

Use clock_gate APIs to enable or disable the clock gates for various peripherals. You’ll need to enable clock gates before you start using peripherals.

The remaining modules provide lower-level APIs for the CCM clock tree. These APIs may not be portable across chip families.

Visibility

If you see items in this module, it’s because a chip family feature is enabled in the HAL. These symbols may vary depending on the selected feature.

Modules

• ahb_clk
  AHB (ARM) clock.
• analog
  Analog clock control module.
• arm_divider
  ARM divider.
• clock_gate
  Functions for reading and manipulating clock gates.
• flexio1_clk
  FLEXIO1 clock root.
• flexio2_clk
  FLEXIO2 clock root.
• ipg_clk
  IPG clock.
• lpi2c_clk
  LPI2C clock root.
• lpspi_clk
  LPSPI clock root.
• output_source
  CCM clock outputs.
• perclk_clk
  PERCLK clock.
• periph_clk2
  Peripheral clock 2.
• pre_periph_clk
  Pre-peripheral clock.
• uart_clk
  UART clock root.

Enums

• LowPowerMode
  Low power mode.

Constants

• XTAL_OSCILLATOR_HZ
  Frequency (Hz) of the crystal oscillator.

Functions

• low_power_mode
  Returns the CCM low power mode.
• set_low_power_mode
  Set the CCM low power mode.