cocotb

Write HDL testbenches in Python with async coroutines; works with Icarus, Verilator, GHDL and commercial simulators.

Intermediate

@cocotb.test()
async def counts(dut):
    cocotb.start_soon(Clock(dut.clk, 10, "ns").start())
    await ClockCycles(dut.clk, 5)
    assert dut.count.value == 5

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