§13 Named bit field within a register (boolean / small enum). value_type may reference an enum. This is the legacy/simple form; see RegisterField (§13.1).
from field: uint32 bit_length = 4;
from field: uint32 bit_offset = 3;
from field: string field_id = 1;
from field: string name = 2;
Optional
from field: moddef.v1.ValueType value_type = 5;
from message moddef.v1.BitField
§13 Named bit field within a register (boolean / small enum). value_type may reference an enum. This is the legacy/simple form; see RegisterField (§13.1).