Add singlepulse support

peakrdl/regblock/field_logic/sw_singlepulse.py

@@ -0,0 +1,23 @@
+from typing import TYPE_CHECKING, List
+
+from .bases import NextStateConditional
+
+if TYPE_CHECKING:
+    from systemrdl.node import FieldNode
+
+class Singlepulse(NextStateConditional):
+    comment = "singlepulse clears back to 0"
+    def is_match(self, field: 'FieldNode') -> bool:
+        return field.get_property('singlepulse')
+
+    def get_predicate(self, field: 'FieldNode') -> str:
+        # TODO: make exporter promote this to an "else"?
+        # Be mindful of sw/hw precedence. this would have to come last regardless
+        return "1"
+
+    def get_assignments(self, field: 'FieldNode') -> List[str]:
+        field_path = self.get_field_path(field)
+        return [
+            f"field_combo.{field_path}.next = '0;",
+            f"field_combo.{field_path}.load_next = '1;",
+        ]