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add non_zero_reset_only #24

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add non_zero_reset_only #24

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0b837e4
Update header_generator.py
youngtack Aug 4, 2025
066b769
Update design_state.py
youngtack Aug 4, 2025
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4 changes: 4 additions & 0 deletions src/peakrdl_cheader/design_state.py
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,10 @@ def __init__(self, top_node: AddrmapNode, kwargs: Any) -> None:
self.reuse_typedefs: bool
self.reuse_typedefs = kwargs.pop("reuse_typedefs", True)

# Enable genration of non zero reset value only
self.non_zero_reset_only: bool
self.non_zero_reset_only = kwargs.pop("non_zero_reset_only", False)

# Enable generation of bit-field structs for registers
self.generate_bitfields: bool
self.generate_bitfields = kwargs.pop("generate_bitfields", False)
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11 changes: 6 additions & 5 deletions src/peakrdl_cheader/header_generator.py
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Expand Up @@ -139,13 +139,14 @@ def enter_Reg(self, node: RegNode) -> Optional[WalkerAction]:
for field in node.fields():
field_prefix = prefix + "__" + field.inst_name.upper()

bm = ((1 << field.width) - 1) << field.low
self.write(f"#define {field_prefix}_bm {bm:#x}\n")
self.write(f"#define {field_prefix}_bp {field.low:d}\n")
self.write(f"#define {field_prefix}_bw {field.width:d}\n")
if not self.ds.non_zero_reset_only:
bm = ((1 << field.width) - 1) << field.low
self.write(f"#define {field_prefix}_bm {bm:#x}\n")
self.write(f"#define {field_prefix}_bp {field.low:d}\n")
self.write(f"#define {field_prefix}_bw {field.width:d}\n")

reset = field.get_property('reset')
if isinstance(reset, int):
if isinstance(reset, int) and (not self.ds.non_zero_reset_only or reset):
self.write(f"#define {field_prefix}_reset {reset:#x}\n")

# No need to traverse fields
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