Add beginnings of the arbitrary exposure time logic. Test with /tests/index.js file

lib/intval/index.js

@@ -40,12 +40,12 @@ intval.init = function () {
 	intval._state = {
 		dir : true, //forward
 		frame : {
-			start : 0, //time frame started, timestamp
+			start : 0, 		//time frame started, timestamp
 			active : false, //should frame be running
-			time : 0, //length of frame, in ms
-			delay : 0, //delay before start of frame, in ms
-
-			expected : 1000 //expected length of frame, in ms
+			time : 0, 		//length of frame, in ms
+			delay : 0, 		//delay before start of frame, in ms
+			open : 300, 	//delay before pausing frame in open state
+			expected : 630 	//expected length of frame, in ms
 		},
 		release : {
 			time: 0,
@@ -117,6 +117,11 @@ intval._startBwd = function () {
 	intval._pin.fwd.writeSync(0)
 	intval._pin.bwd.writeSync(1)
 }
+
+intval._pause = function () {
+	intval._pin.fwd.writeSync(0)
+	intval._pin.fwd.writeSync(0)
+}
 /** 
 * Stop motor by setting both motor pins to 0 (LOW)
 *
@@ -239,6 +244,12 @@ intval.setDir = function (val = true) {
 	}
 	intval._state.dir = val
 }
+intval.setTime = function (val = 0) {
+	intval._state.frame.time = val
+} 
+intval.setDelay = function (val = 0) {
+	intval._state.frame.delay = val
+}
 /**
 * Begin a single frame with set variables or defaults
 *
@@ -270,6 +281,14 @@ intval.frame = function (dir = null, time = null) {
 	} else {
 		intval._startBwd()
 	}
+	if (time !== null && time !== 0) {
+		setTimeout(intval._pause, intval._state.frame.open)
+		if (dir) {
+			setTimeout(intval._startFwd, 1000)
+		} else {
+			setTimeout(intval._startBwd, 1000)
+		}
+	}
 }
 /**
 * Start a sequence of frames, using defaults or explicit instructions

tests/index.js

@@ -3,3 +3,5 @@
 const intval = require('../lib/intval')
 
 intval.init()
+intval.setDir(false)
+intval.setTime(1000)