Struct SystemTimer

pub struct SystemTimer {
    pub alarm0: Alarm,
    pub alarm1: Alarm,
    pub alarm2: Alarm,
}

Available on crate feature unstable only.

System Timer driver.

Fields

alarm0: Alarm

Alarm 0.

alarm1: Alarm

Alarm 1.

alarm2: Alarm

Alarm 2.

Implementations

impl SystemTimer

pub const BIT_MASK: u64 = 4_503_599_627_370_495u64

Bitmask to be applied to the raw register value.

pub fn ticks_per_second() -> u64

Returns the tick frequency of the underlying timer unit.

pub fn new(_systimer: SYSTIMER) -> Self

Create a new instance.

pub fn unit_value(unit: Unit) -> u64

Get the current count of the given unit in the System Timer.

pub unsafe fn configure_unit(unit: Unit, config: UnitConfig)

Configures when this counter can run. It can be configured to stall or continue running when CPU stalls or enters on-chip-debugging mode.

Safety

• Disabling a Unit whilst Alarms are using it will affect the Alarms operation.
• Disabling Unit0 will affect Instant::now.

pub unsafe fn set_unit_value(unit: Unit, value: u64)

Set the value of the counter immediately. If the unit is at work, the counter will continue to count up from the new reloaded value.

This can be used to load back the sleep time recorded by RTC timer via software after Light-sleep

Safety

• Modifying a unit’s count whilst Alarms are using it may cause unexpected behaviour
• Any modification of the unit0 count will affect Instant::now