31 lines
910 B
Python
31 lines
910 B
Python
import re
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from migen.fhdl.structure import *
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from migen.fhdl.module import Module
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from migen.bank.description import *
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def encode_version(version):
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match = re.match("(\d+)\.(\d+)(\.(\d+))?(rc(\d+))?", version, re.IGNORECASE)
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r = (int(match.group(1)) << 12) | (int(match.group(2)) << 8)
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subminor = match.group(4)
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rc = match.group(6)
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if subminor:
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r |= int(subminor) << 4
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if rc:
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r |= int(rc)
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return r
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class Identifier(Module, AutoReg):
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def __init__(self, sysid, version, frequency):
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self._r_sysid = RegisterField(16, access_bus=READ_ONLY, access_dev=WRITE_ONLY)
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self._r_version = RegisterField(16, access_bus=READ_ONLY, access_dev=WRITE_ONLY)
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self._r_frequency = RegisterField(32, access_bus=READ_ONLY, access_dev=WRITE_ONLY)
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###
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self.comb += [
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self._r_sysid.field.w.eq(sysid),
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self._r_version.field.w.eq(encode_version(version)),
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self._r_frequency.field.w.eq(frequency)
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]
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