Merge pull request #279 from rust-embedded/bitmask

bitmask

Author: burrbull

svd-rs/CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ## Unreleased
 
 - Revert the `riscv` elements, as well as the `unstable-riscv` feature.
+- Add `bitmask` for `FieldInfo`, `Field` and `RegisterInfo`
 
 ## [v0.14.9] - 2024-08-20
 
@@ -143,4 +144,3 @@ Previous versions in common [changelog](../CHANGELOG.md).
 [v0.11.2]: https://github.com/rust-embedded/svd/compare/svd-rs-v0.11.1...svd-rs-v0.11.2
 [v0.11.1]: https://github.com/rust-embedded/svd/compare/v0.11.0...svd-rs-v0.11.1
 [v0.11.0]: https://github.com/rust-embedded/svd/compare/v0.10.2...v0.11.0
-

svd-rs/src/field.rs

@@ -375,6 +375,12 @@ impl FieldInfo {
  self.bit_range.msb()
  }
 
+ /// Get bits which is affected by field
+ pub fn bitmask(&self) -> u64 {
+ let BitRange { offset, width, .. } = self.bit_range;
+ (!0u64 >> (64 - width)) << offset
+ }
+
  /// Get enumeratedValues cluster by usage
  pub fn get_enumerated_values(&self, usage: Usage) -> Option<&EnumeratedValues> {
  match self.enumerated_values.len() {
@@ -406,6 +412,21 @@ impl Field {
  }
  self.deref().validate_all(lvl)
  }
+
+ /// Get bits which is affected by field or field array
+ pub fn bitmask(&self) -> u64 {
+ match self {
+ Field::Single(f) => f.bitmask(),
+ Field::Array(f, d) => {
+ let mask = f.bitmask();
+ let mut bits = 0;
+ for i in 0..d.dim {
+ bits |= mask << (i * d.dim_increment);
+ }
+ bits
+ }
+ }
+ }
 }
 
 impl Name for FieldInfo {

svd-rs/src/register.rs

@@ -420,6 +420,11 @@ impl RegisterInfo {
  pub fn get_mut_field(&mut self, name: &str) -> Option<&mut Field> {
  self.fields_mut().find(|f| f.name == name)
  }
+
+ /// Get bits which is affected by register fields
+ pub fn bitmask(&self) -> u64 {
+ self.fields().fold(0, |mask, f| mask | f.bitmask())
+ }
 }
 
 impl Register {