[]Struct circuit_playground_express::SYST

pub struct SYST { /* fields omitted */ }

SysTick: System Timer

Methods

impl SYST

pub fn clear_current(&mut self)

Clears current value to 0

After calling clear_current(), the next call to has_wrapped() will return false.

pub fn disable_counter(&mut self)

Disables counter

pub fn disable_interrupt(&mut self)

Disables SysTick interrupt

pub fn enable_counter(&mut self)

Enables counter

NOTE The reference manual indicates that:

"The SysTick counter reload and current value are undefined at reset, the correct initialization sequence for the SysTick counter is:

  • Program reload value
  • Clear current value
  • Program Control and Status register"

The sequence translates to self.set_reload(x); self.clear_current(); self.enable_counter()

pub fn enable_interrupt(&mut self)

Enables SysTick interrupt

pub fn get_clock_source(&mut self) -> SystClkSource

Gets clock source

NOTE This takes &mut self because the read operation is side effectful and can clear the bit that indicates that the timer has wrapped (cf. SYST.has_wrapped)

pub fn get_current() -> u32

Gets current value

pub fn get_reload() -> u32

Gets reload value

pub fn get_ticks_per_10ms() -> u32

Returns the reload value with which the counter would wrap once per 10 ms

Returns 0 if the value is not known (e.g. because the clock can change dynamically).

pub fn has_reference_clock() -> bool

Checks if an external reference clock is available

pub fn has_wrapped(&mut self) -> bool

Checks if the counter wrapped (underflowed) since the last check

NOTE This takes &mut self because the read operation is side effectful and will clear the bit of the read register.

pub fn is_counter_enabled(&mut self) -> bool

Checks if counter is enabled

NOTE This takes &mut self because the read operation is side effectful and can clear the bit that indicates that the timer has wrapped (cf. SYST.has_wrapped)

pub fn is_interrupt_enabled(&mut self) -> bool

Checks if SysTick interrupt is enabled

NOTE This takes &mut self because the read operation is side effectful and can clear the bit that indicates that the timer has wrapped (cf. SYST.has_wrapped)

pub fn is_precise() -> bool

Checks if the calibration value is precise

Returns false if using the reload value returned by get_ticks_per_10ms() may result in a period significantly deviating from 10 ms.

pub fn set_clock_source(&mut self, clk_source: SystClkSource)

Sets clock source

pub fn set_reload(&mut self, value: u32)

Sets reload value

Valid values are between 1 and 0x00ffffff.

NOTE To make the timer wrap every N ticks set the reload value to N - 1

impl SYST

pub fn ptr() -> *const RegisterBlock

Returns a pointer to the register block

Trait Implementations

impl Send for SYST

impl Deref for SYST

type Target = RegisterBlock

The resulting type after dereferencing.

Auto Trait Implementations

impl !Sync for SYST

Blanket Implementations

impl<T> From for T[src]

impl<T, U> TryFrom for T where
    U: Into<T>, 
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type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<T, U> Into for T where
    U: From<T>, 
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impl<T> Borrow for T where
    T: ?Sized
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impl<T> BorrowMut for T where
    T: ?Sized
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impl<T> Any for T where
    T: 'static + ?Sized
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