Add better state object structure

And use in preliminary logic

lib/intval/index.js

@@ -35,8 +35,12 @@ class Intval {
 		this._pin = {}
 		this._state = {
 			dir : true, //forward
-			running : false,
-			startFrame : 0
+			frame : {
+				start : 0,
+				active : false,
+				val : 0,
+				expected : 0
+			}
 		}
 		this._declarePins()
 	}
@@ -61,6 +65,8 @@ class Intval {
 		if (err) {
 			console.error(err)
 		}
+		this._state.frame.val = val
+		//determine when to stop
 	}
 	_watchRelease (err, val) {
 		if (err) {
@@ -74,7 +80,8 @@ class Intval {
 		this._state.dir = val
 	} 
 	frame (dir = true, time = 0, delay = 0) {
-		this._state.running = true
+		this._state.frame.start = +new Date()
+		this._state.frame.active = true
 		this._pin.micro.watch(this._watchMicro)
 		if (delay !== 0) {
 			setTimeout(function () {
@@ -96,8 +103,13 @@ class Intval {
 	_stop () {
 		this._pin.fwd.set(0)
 		this._pin.bwd.set(0)
+
+		let len = (+new Date()) - this._state.frame.start
+
+		console.log(`Frame stopped`, { ms : len })
+
 		this._pin.micro.unwatch()
-		this._state.running = false
+		this._state.frame.active = false
 	}
 	status () {
 		return this._state