Pocket Computer Shutdown after 10 seconds - ComputerCraft Forums (archive)

Heroj04 #1

31 posts

Posted 09 June 2014 - 11:49 AM

ok so when i run this code, the computer shuts down after 10 seconds which leads me to believe it is a gps error.
however i dont know what is wrong with it.
could someone please point out what is happening so i can fix it

Spoiler


local modem = peripheral.wrap("back")
local x, y, z = gps.locate(10)
local doorOpen = false
local xFile = fs.open("doors/xDoor", "r")
local yFile = fs.open("doors/yDoor", "r")
local zFile = fs.open("doors/zDoor", "r")
local xDoor = textutils.unserialize(xFile.readAll())
local yDoor = textutils.unserialize(yFile.readAll())
local zDoor = textutils.unserialize(zFile.readAll())
xFile.close()
yFile.close()
zFile.close()
function table.contains(table, element)
for _, value in pairs(table) do
  if value == element then
   return true
  end
end
return false
end
while true do
if table.contains(xDoor, x) and table.contains(yDoor, y) and table.contains(zDoor, z) and doorOpen == false then
  modem.transmit(1, 2, "open")
  print("Opening")
  doorOpen = true
elseif doorOpen == true then
  modem.transmit(1, 2, "close")
  print("Closing")
  doorOpen = false
end
end

also here are the door files.

xDoor

Spoiler


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yDoor

Spoiler



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zDoor

Spoiler



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Thanks

Bomb Bloke #2

Bomb Bloke's profile picture

7083 posts

Location Tasmania (AU)

Posted 09 June 2014 - 12:04 PM

When a computer/turtle starts running code, ComputerCraft starts a ten second timer. If that code doesn't yield before that timer ends then ComputerCraft crashes that computer. After each yield, processing continues with a new time limit.

The reason why is that running your code chews up valuable server processing power, and so it shouldn't be able to monopolise it. In fact, only ONE CC device can run code at a time: While one is doing something, none of the others can do anything until it yields.

Whether or not it takes more then ten seconds for your code to execute has a lot to do with the power of the Minecraft server it's running on, and how often you allow your code to yield. Pulling events (eg getting typed characters) or sleeping triggers a yield, and many commands (eg turtle movements or getting text input from the user) have to pull events to work anyway.

Your code runs non-stop, without any pauses at all. You likely want at least a "sleep(5)" near the bottom of that "while" loop, along with another call to gps.locate() so that the Pocket Computer can actually track its own movements.

I'm also not sure I see the need for those table lookups. Why not just check if eg "x >= 44 and x <= 50" etc?

Heroj04 #3

31 posts

Posted 09 June 2014 - 12:09 PM

Bomb Bloke, on 09 June 2014 - 12:04 PM said:
…. I'm also not sure I see the need for those table lookups. Why not just check if eg "x >= 44 and x <= 50" etc? ….

haha wow i have no idea why i did not think of that. (i need to think simpiler haha).
anyway i will change the code around and test it some more. but im running this on single player with 16 GB of RAM. so that shouldnt be too much of a problem.
oh well. im off to test more