top_count/src/counter.scala


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package top_count

import spinal.core._

case class counter() extends Component {
  val io = new Bundle {
    val en_i = in Bool()
    val cnt_o  = out UInt(4 bits)
  }

  // The counter register
  val cnt = Reg(UInt(4 bits)) init 0

  when (io.en_i) {
    cnt := cnt + 1
  }
  // Map the register content to the output
  io.cnt_o := cnt
}