Struct Pi 

pub struct Pi { /* private fields */ }

The PI register file and DMA state.

Implementations

impl Pi

pub const fn new() -> Self

Power-on state.

pub const fn interrupt(&self) -> bool

Is the PI asserting its interrupt?

pub const fn read(&self, addr: u32) -> u32

Read a PI register.

pub const fn write(&mut self, addr: u32, val: u32) -> Option<Transfer>

Write a PI register, returning a Transfer if the write started one.

The transfer is returned rather than performed because the PI does not own RDRAM — the Bus does. Performing it here would need the engine to hold a reference back to the Bus that owns it, which is the cycle the whole architecture is built to avoid.

pub const fn complete(&mut self)

Mark the current transfer complete and raise the PI interrupt.

Separate from Pi::write because completion is a timing event: the Bus performs the copy and then tells the PI it is done, which is where a non-instant DMA will later charge its cycles.

Trait Implementations

impl Clone for Pi

fn clone(&self) -> Pi

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Pi

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Pi

fn default() -> Pi

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Pi

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Pi

fn eq(&self, other: &Pi) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Pi

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for Pi

impl Eq for Pi

impl StructuralPartialEq for Pi