eb001/src/main/scala/backBoard/ebus/Encryptor.scala

package BACK

import chisel3._
import chisel3.util._


class Encryptor_IO_Bundle extends Bundle{
  val init = Flipped(Valid(UInt(128.W)))

  val op = Decoupled(UInt(8.W))
}

class Encryptor extends Module{
  val io: Encryptor_IO_Bundle = IO(new Encryptor_IO_Bundle)

  val encryptReg = RegInit(0.U(128.W))

  when( io.init.valid ){
    encryptReg := io.init.bits
  } .elsewhen( io.op.fire ){
    encryptReg := Cat(encryptReg(119,0), io.op.bits)
  }

  val opValid = RegInit(false.B)
  when( io.init.fire ){
    opValid := true.B
  }

  io.op.valid := opValid
  io.op.bits  := encryptReg(127, 120)

}