Module tm4c123x_hal::sysctl

Expand description

System Control

The SYSCTL peripheral controls clocks and power.

The TM4C123x can be clocked from the Main Oscillator or the PLL, through a divider. The Main Oscillator can be either the internal 16 MHz precision oscillator, a 4 MHz derivation of the same, or an external crystal.

SYSCTL includes the following registers:

Device ID (class, major, minor, family, package, temperature range, )
Brown-out reset control
Brown-out/PLL interrupt control
Reset cause
Run-time clock configuration
GPIO high-performance bus control
System Properties
Registers to indicate whether peripherals are present
Registers to reset peripherals
Registers to enable/disable clocking of peripherals

See the LM4F120 datasheet, page 228 for a full list.

Modules

chip_id

This module is all about identifying the physical chip we’re running on.

Structs

ClockSetup

Used to configure the clock generators.

Clocks

Frozen clock frequencies

PowerControl

Used to gate access to the run-time power control features of the chip.

Sysctl

Constrained SYSCTL peripheral.

Enums

CrystalFrequency

Selects which crystal is fitted to the XOSC pins.

Divider

Selects how much to divide the system oscillator down.

Domain

List of peripherals that can be enabled or disabled

Oscillator

Selects the system oscillator source

PllOutputFrequency

Selects what to divide the PLL’s 400MHz down to.

PowerState

Select whether the peripheral should be on or off

RunMode

Select in which mode the peripheral should be affected

SystemClock

Selects the source for the system clock

Traits

SysctlExt

Extension trait that constrains the SYSCTL peripheral

Functions

control_power

Activate or De-Activate clocks and power to the given peripheral in the given run mode.

reset

Reset a peripheral