Use traits between KvTransfer and TopKvTransfer modules to manage IO fields duplicates

[VMois]

Possible example of structure:

import chisel3._

trait KvTransferControlIOParams {
  val numberOfBuffers: Int
}

trait KvTransferControlIO extends KvTransferControlIOParams {
  val command = Input(UInt(2.W))
  val stop = Input(Bool())
  val bufferInputSelect = Input(UInt(log2Ceil(numberOfBuffers).W))
  val busy = Output(Bool())
}

trait KvTransferIOParams {
  val busWidth: Int
  val numberOfBuffers: Int
}

trait KvTransferIO extends KvTransferIOParams {
  val data = Output(UInt(busWidth.W))
  // Define other IO signals related to KvTransferIO here
}

class MyModule(params: KvTransferControlIOParams with KvTransferIOParams) extends Module {
  val io = IO(new Bundle with KvTransferControlIO with KvTransferIO {
    val numberOfBuffers = params.numberOfBuffers
    val busWidth = params.busWidth
  })

  // Module logic goes here, you can use io.command, io.stop, io.bufferInputSelect, io.busy, io.data, etc.
}

val numberOfBuffers = 4 // Example number of buffers
val busWidth = 32 // Example bus width

val myModuleInstance = Module(new MyModule(new KvTransferControlIOParams {
  val numberOfBuffers: Int = numberOfBuffers
} with KvTransferIOParams {
  val busWidth: Int = busWidth
  val numberOfBuffers: Int = numberOfBuffers
}))

[VMois]

axi-node project has a nice example of trait usage.