Create Custom Library with no UI Components

The solution might not work in my situation.

We have two files: measure.brs and timertask.xml as our end product
Timertask is part of one of measure.brs for initiating a timer and call a method periodically. 

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Monaco} span.s1 {color: #3f7777}

m.Timer       = m.top.findNode("timerTask")

and i am sending object to timer in following way

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Monaco} p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Monaco; color: #3629d2} span.s1 {color: #3629d2} span.s2 {color: #3f7777} span.s3 {color: #000000}
initTimers = function()
    m.doUpdate()
    m.doSync()
    m.timer.setField("test",m)
    m.timer.control = "RUN"
    end function

and inside timer if i try to access m.top.test.doupdate() I am getting invalid -p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Monaco}
Member function not found in BrightScript Component or interface. (runtime error &hf4) in pkg:/components/timerTask.xml(22)

I have two questions. 

Can i have a timer run in same file without help of task. Will i be able to run it in background thread (i Think No)

Is there a way we can pass member functions into task 

Thanks
Srikanth