Examples | SpinalHDL documentation

Some Spinal code examples

A simple counter

@TODO Describe what is done

class Counter(width : Int) extend Component{
  val io = new Bundle{
    val clear = in Bool
    val value = out UInt(width bit)
  }
  val register = Reg(UInt(width bit)) init(0)
  register := register + 1
  when(io.clear){
    register := 0
  }
  io.value := register
}

A carry adder

@TODO Describe what is done ```scala class CarryAdder(size : Int) extends Component{ val io = new Bundle{ val a = in UInt(size bit) val b = in UInt(size bit) val result = out UInt(size bit) //result = a + b }

var c = False //Carry, like a VHDL variable for (i <- 0 until size) { //Create some intermediate value in the loop scope. val a = io.a(i) val b = io.b(i)

//The carry adder's asynchronous logic
io.result(i) := a ^ b ^ c
c = (a & b) | (a & c) | (b & c);    //variable assignment   } }

object CarryAdderProject { def main(args: Array[String]) { SpinalVhdl(new CarryAdder(4)) } } ```

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