Sean Cross
8fe27d9371
git-subtree-dir: hw git-subtree-mainline:e4af98b4aagit-subtree-split:d812378c4d
77 lines
2.7 KiB
Python
77 lines
2.7 KiB
Python
#!/usr/bin/env python3
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# This variable defines all the external programs that this module
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# relies on. lxbuildenv reads this variable in order to ensure
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# the build will finish without exiting due to missing third-party
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# programs.
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LX_DEPENDENCIES = ["riscv", "icestorm", "yosys"]
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# Import lxbuildenv to integrate the deps/ directory
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import lxbuildenv
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# Disable pylint's E1101, which breaks completely on migen
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#pylint:disable=E1101
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from migen import Module, Signal, Instance, ClockDomain, If, run_simulation
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from migen.genlib.resetsync import AsyncResetSynchronizer
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from litex.build.lattice.platform import LatticePlatform
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from litex.build.generic_platform import Pins, IOStandard, Misc, Subsignal
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from litex.soc.integration import SoCCore
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from litex.soc.integration.builder import Builder
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from litex.soc.integration.soc_core import csr_map_update
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from litex.soc.interconnect import wishbone
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from litex.soc.interconnect.csr import CSR, CSRStorage, AutoCSR
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def csr_test(dut):
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for i in range(20):
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counter = yield dut.counter
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# test_value = yield dut.test_value.w
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(test_value) = yield from dut.test_value.read()
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print("CSR value: {} / {}".format(counter, test_value))
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# yield from CSRStorage.update_csrs()
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yield
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class TestCSR(Module, AutoCSR):
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def __init__(self):
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# self.counter = Signal(8)
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# self.test_value = CSR(8)
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# self.result = Signal(8)
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# self.read_result = Signal()
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# self.sync += [
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# self.counter.eq(self.counter+1),
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# self.test_value.w.eq(self.counter),
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# self.result.eq(self.test_value.r),
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# self.read_result.eq(self.test_value.re),
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# ]
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self.counter = Signal(8)
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self.test_value = CSRStorage(8, write_from_dev=True)
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self.result = Signal(8)
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self.result_re = Signal()
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self.sync += [
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self.counter.eq(self.counter+1),
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self.test_value.we.eq(1),
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self.test_value.dat_w.eq(self.counter),
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self.result.eq(self.test_value.storage),
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self.result_re.eq(self.test_value.re),
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]
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def main():
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dut = TestCSR()
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for x in dir(dut):
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print("x: {}".format(x))
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for csr in dut.get_csrs():
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print("csr: {}".format(csr))
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if isinstance(csr, CSRStorage) and hasattr(csr, "dat_w"):
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print("Adding CSRStorage patch")
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dut.sync += [
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If(csr.we,
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csr.storage.eq(csr.dat_w),
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csr.re.eq(1),
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).Else(
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csr.re.eq(0),
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)
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]
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run_simulation(dut, csr_test(dut), vcd_name="csr-test.vcd")
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if __name__ == "__main__":
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main()
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