Module tm4c123x_hal::sysctl
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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
This module is all about identifying the physical chip we’re running on.
Structs
Used to configure the clock generators.
Frozen clock frequencies
Used to gate access to the run-time power control features of the chip.
Constrained SYSCTL peripheral.
Enums
Selects which crystal is fitted to the XOSC pins.
Selects how much to divide the system oscillator down.
List of peripherals that can be enabled or disabled
Selects the system oscillator source
Selects what to divide the PLL’s 400MHz down to.
Select whether the peripheral should be on or off
Select in which mode the peripheral should be affected
Selects the source for the system clock
Traits
Extension trait that constrains the
SYSCTL
peripheralFunctions
Activate or De-Activate clocks and power to the given peripheral in the
given run mode.
Reset a peripheral