Problem With Coroutine

i made redstone pulser program with lua but it doesn't show me anything help me and i am first with coroutine please fix this program it is really simple program
http://pastebin.com/m3C72S8d

function TerminalHandler()
while true do
local interval12 = loaddata("interval")
write(interval12)
write("interval for timer : ")
local interval = read()
local interval1 = {}
interval1[1] = interval
savedata(interval1,"interval")
end
end
function timer()
while true do
local interval20 = loaddata("interval")
local interval = interval20[1]
sleep(interval)
rs.setOutput("left",true)
sleep(interval)
rs.setOutput("left",false)
end
end
function process()
local c1 = coroutine.create(TerminalHandler)
local c2 = coroutine.create(timer,interval)
local eventData = {}
while true do
–# resume our routine giving it the event data
coroutine.resume(c1, unpack(eventData))
if coroutine.status(c1) == "dead" then
c1 = coroutine.create(TerminalHandler)
end
–# resume our routine giving it the event data
coroutine.resume(c2, unpack(eventData))
if coroutine.status(c2) == "dead" then
c2 = coroutine.create(timer)
end
eventData = { coroutine.yield() } –# you could also use os.pullEventRaw here, but again, it is just a wrapper of coroutine.yield, so why not just use the top level function
end
end
function savedata(table,id)
local file = fs.open(id,"w")
file.write(textutils.serialize(table))
file.close()
end
function loaddata(id)
local file = fs.open(id,"r")
local data = file.readAll()
file.close()
return textutils.unserialize(data)
end
process()

Code tags? :D/>

Xyexs, on 27 July 2013 - 12:48 PM said:

Code tags? :D/>

You have eyes, you have a pastebin ID, you could have helped. If you have no idea what happens, don't comment.

The problem is (apart from the hideous indentation) that the program is not failsafe. At first, the file called interval doesn't exist. Both coroutines try to open the nonexistent file, and both of them die because of the error which occurs when they try to call the readAll method of the handle, which is nil. Save the file first if it doesn't exist, you can read it after that.

EDIT: Forgot to mention. interval is a string. sleep accepts only numbers.

sleep(tonumber(interval))

LBPHacker, on 27 July 2013 - 12:56 PM said:

Xyexs, on 27 July 2013 - 12:48 PM said:

Code tags? :D/>/>/>

You have eyes, you have a pastebin ID, you could have helped. If you have no idea what happens, don't comment.

The problem is (apart from the hideous indentation) that the program is not failsafe. At first, the file called interval doesn't exist. Both coroutines try to open the nonexistent file, and both of them die because of the error which occurs when they try to call the readAll method of the handle, which is nil. Save the file first if it doesn't exist, you can read it after that.

EDIT: Forgot to mention. interval is a string. sleep accepts only numbers.

sleep(tonumber(interval))

I really thanks about your help but one question how can i use coroutine.yield() to transfer variable "interval" to coroutine timer() so i can transfer variable easier please help??? Also i need to update "interval" using TerminalHandler() coroutine.

hasunwoo, on 27 July 2013 - 07:26 PM said:

I really thanks about your help but one question how can i use coroutine.yield() to transfer variable "interval" to coroutine timer() so i can transfer variable easier please help??? Also i need to update "interval" using TerminalHandler() coroutine.

I've written a tutorial on just that here. It should help you out considerably.

Bubba, on 27 July 2013 - 09:45 PM said:

hasunwoo, on 27 July 2013 - 07:26 PM said:

I really thanks about your help but one question how can i use coroutine.yield() to transfer variable "interval" to coroutine timer() so i can transfer variable easier please help??? Also i need to update "interval" using TerminalHandler() coroutine.

I've written a tutorial on just that here. It should help you out considerably.

I really appreciate with this tutorial i fully understanded coroutine!!!!