fix(generator): avoid constant name duplication of mask and value

CHANGELOG.md

@@ -16,6 +16,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Changed block, register type definitions to support multiple backends. See [the merge request at mpsoc software](https://gitlab.cern.ch/wotsubo/mpsoc-software/-/merge_requests/9) for more information.
 
+### Fixed
+
+- Avoid mask and value constant name duplication by inserting `_VAL_` to value constants.
+
 ## [0.2.0] - 2025-02-12
 
 ### Added

src/generator/codegen_register.rs

@@ -322,7 +322,7 @@ fn generate_single_ux_field(
 
 fn custom_value_const_name(field_name: &Ident, value_name: &str) -> Ident {
     util::parse_to_ident(&format!(
-        "{}_{}",
+        "{}_VAL_{}",
         field_name.to_string().to_shouty_snake_case(),
         value_name.to_shouty_snake_case()
     ))