scala - 类是抽象的；无法在凿子上实例化错误

Question

我刚刚开始使用chisel3，但我想反转数字。这是测试平台的代码:

class LengthTest(c: Length) extends PeekPokeTester(c) {
  poke(c.io.x, 12)
  expect(c.io.z, 21)
}



abstract class LengthTester extends ChiselFlatSpec {
  behavior of "Length" 
  backends foreach { backend =>
    it should s"demonstrate usage of functions that generate code in $backend" in {
      Driver(() => new Length, backend)((c) => new LengthTest(c)) should  be (true)
    }
  }
}

这是主要代码

abstract class Length extends Module {
  val io = IO(new Bundle {
    val x   = Input(UInt(16.W))
    val z   = Output(UInt(16.W))
  })
  def Reverse(a: UInt) : UInt 
  io.z := Reverse(io.x)
}

这引发了一个错误，指出无法实例化类。请帮忙!!

Answer 1

您需要从自己的关键字中删除abstract并删除def Reverse(a: UInt) : UInt)或为其提供一些实现

看来Reverse is an object defined in the chisel utils-因此您只需要导入它，然后就可以io.z:= Reverse(io.x)