Struct Atrans

#[repr(transparent)]
pub struct Atrans(pub u32);

Configure address translation for XIP virtual addresses 0x000000 through 0x3fffff (a 4 MiB window starting at +0 MiB). Address translation allows a program image to be executed in place at multiple physical flash addresses (for example, a double-buffered flash image for over-the-air updates), without the overhead of position-independent code. At reset, the address translation registers are initialised to an identity mapping, so that they can be ignored if address translation is not required. Note that the XIP cache is fully virtually addressed, so a cache flush is required after changing the address translation.

Tuple Fields

0: u32

Implementations

impl Atrans

pub const fn base(&self) -> u16

Physical address base for this virtual address range, in units of 4 kiB (one flash sector). Taking a 24-bit virtual address, firstly bits 23:22 (the two MSBs) are masked to zero, and then BASE is added to bits 23:12 (the upper 12 bits) to form the physical address. Translation wraps on a 16 MiB boundary.

pub fn set_base(&mut self, val: u16)

Physical address base for this virtual address range, in units of 4 kiB (one flash sector). Taking a 24-bit virtual address, firstly bits 23:22 (the two MSBs) are masked to zero, and then BASE is added to bits 23:12 (the upper 12 bits) to form the physical address. Translation wraps on a 16 MiB boundary.

pub const fn size(&self) -> u16

Translation aperture size for this virtual address range, in units of 4 kiB (one flash sector). Bits 21:12 of the virtual address are compared to SIZE. Offsets greater than SIZE return a bus error, and do not cause a QSPI access.

pub fn set_size(&mut self, val: u16)

Translation aperture size for this virtual address range, in units of 4 kiB (one flash sector). Bits 21:12 of the virtual address are compared to SIZE. Offsets greater than SIZE return a bus error, and do not cause a QSPI access.

Trait Implementations

impl Clone for Atrans

fn clone(&self) -> Atrans

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Atrans

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

Formats the value using the given formatter.

impl Default for Atrans

fn default() -> Atrans

Returns the “default value” for a type.

impl PartialEq for Atrans

fn eq(&self, other: &Atrans) -> 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 Copy for Atrans

impl Eq for Atrans

impl StructuralPartialEq for Atrans