Chiselsim !free! [ Deluxe · SERIES ]

c.io.en.poke(true.B) c.clock.step(3) c.io.out.expect(3.U)

class CounterTest extends AnyFlatSpec with ChiselScalatestTester { behavior of "Counter" it should "count when enabled" in { test(new Counter) { c => c.io.en.poke(false.B) c.clock.step(5) c.io.out.expect(0.U) // remains zero chiselsim

In educational contexts, ChiselSim allows students to simulate their first ALU or state machine in an IDE without installing a complex toolchain. In industry, teams use it to rapidly prototype accelerators before committing to slow gate-level simulations. ChiselSim is more than a simulation trick—it’s a philosophy: simulate where you design, with the tools you already know. By bringing simulation into the Chisel/Scala ecosystem, it eliminates context switching, accelerates debug cycles, and opens hardware design to modern software practices. For anyone serious about productive, testable, and maintainable digital design, ChiselSim is not just helpful—it’s essential. Would you like a deeper dive into Treadle’s internals or a comparison with traditional Verilog simulators? By bringing simulation into the Chisel/Scala ecosystem, it

c.io.en.poke(false.B) c.clock.step(2) c.io.out.expect(3.U) // unchanged } } } it eliminates context switching