Source code for hwtLib.examples.parametrization
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from hwt.code import Concat
from hwt.interfaces.std import VectSignal
from hwt.synthesizer.unit import Unit
from hwt.synthesizer.param import Param
from hwt.hdl.types.defs import INT
from hwt.hdl.types.bits import Bits
[docs]class ParametrizationExample(Unit):
"""
.. hwt-autodoc::
"""
def _config(self):
self.PARAM_0 = Param(0)
self.PARAM_10 = Param(10)
try:
self.PARAM_1_sll_512 = Param(INT.from_py(1 << 512))
raise AssertionError("Parameter with int value which is"
"too big to fit in integer type of target hdl language")
except ValueError:
# portable type for large int, generally int in verilog/vhdl is 32b wide
self.PARAM_1_sll_512 = Param(Bits(512 + 1).from_py(1 << 512))
self.PARAM_1_sll_512_py_int = Param(1 << 512)
def _declr(self):
assert int(self.PARAM_0) == 0
assert int(self.PARAM_10 + 10) == 20
assert int(self.PARAM_1_sll_512) == 1 << 512
self.din = VectSignal(self.PARAM_10)
self.dout = VectSignal(self.PARAM_10 * 2)._m()
def _impl(self):
assert int(self.PARAM_0) == 0
assert int(self.PARAM_10 + 10) == 20
assert int(self.PARAM_1_sll_512) == 1 << 512
self.dout(Concat(self.din, self.din))
if __name__ == "__main__": # alias python main function
from hwt.synthesizer.utils import to_rtl_str
u = ParametrizationExample()
print(to_rtl_str(u))