{
  "name": "interval",
  "description":"send signal 1 at intervals",
  "spec": {
    "id":"__HOPE__/builtin/timer/interval",
    "name": "interval_spec",
    "in": {
      "ports": [{
        "name": "interval",
        "type": "int",
        "default": 1000
      }]
    },
    "out": {
      "ports": [{
        "name": "out",
        "type": "int"
      }]
    }
  },
  "doc":"builtin/timer.html#interval"
}