Lua Programming Help Thread

[omegaridley]

Well mine wasn't as simple to code as:

RipISO(); // Please

I hated the idea of one on a forum. Now there can be hundreds of them.


Thanks. Funny I thought Time Machine would stuff up the graphics.

no its graphics look fine compared to my friends fat PSP

[omegaridley]

Another question, i want to make it where i press a button, text appears, and then it goes away after about 3 seconds, like this for example:

I press X, and it says on the bottom:

USB mode activated!

and then it goes away after 3 seconds.

I know how to do the USB thing, but as for the txt appearing and going away....

well, can anyone help?

[joseph10444]

so are you gonna release it??

[Moose]

Merged with the Lua Help Thread. :)

[TurtlesPwn]

removeUSBTextCounter = 0

while true do
if pad:cross() then showUSBText = true System.usbDiskModeActivat e() end
if showUSBText then
removeUSBTextCounter = removeUSBTextCounter + 1
if removeUSBTextCounter > 180 then showUSBText = false removeUSBTextCounter = 0
screenrint(2,260,"USB mode activated!")
end
end

[omegaridley]

thx TurtlesPwn, but now I have another question...

When I press a button, it executes the command. Then, once its done, it goes back to the menu of my program. example:

I pressed O to go back on a system message, and it went back to the menu of my app.

but when it goes back to the menu, I can an longer press any buttons, when I press a button, nothing happins, Once I press a button, its done, i can't press any more

can anyone help?

[TurtlesPwn]

Nobody can help with the info youve given us so far

[omegaridley]

Nobody can help with the info youve given us so far

ok, ill try to be more specific:

Ok, lets say I pressed O in the program I have created, and it starts to play music, now I want to shut off the music, lets say i pressed X to stop the music, but it does not work...

Here is another example:

Lets say i pressed O and it displayed a picture of... a beach. and now I want to go back, Lets say I pressed X to go back, but it doesnt go back, even though i programmed it to go back

how do I fix this problem?

[ifiwere1337]

ok, ill try to be more specific:

Ok, lets say I pressed O in the program I have created, and it starts to play music, now I want to shut off the music, lets say i pressed X to stop the music, but it does not work...

Here is another example:

Lets say i pressed O and it displayed a picture of... a beach. and now I want to go back, Lets say I pressed X to go back, but it doesnt go back, even though i programmed it to go back

how do I fix this problem?

why dont you just ask us to write the program for you, it would be much better than writing 10 posts on how do i do this, i learned how to do that stuff by looking at past posts, you could use the search, its there for a reason

[Nielkie]

You obviously do not understand the flow of your program, that is something we cannot help you with.

[omegaridley]

why dont you just ask us to write the program for you, it would be much better than writing 10 posts on how do i do this, i learned how to do that stuff by looking at past posts, you could use the search, its there for a reason

I just want a code that can loop the program so I wont have to reset the program everytime i execute a command

can you do that?

[TurtlesPwn]

Please tell me youre using a while loop.....

[omegaridley]

Please tell me youre using a while loop.....

yeah, but, i think, well, here is my coding(100% working except for the problem im having):

white = Color.new(255, 255, 255)
background = Image.load("SYSTEM/images/background.png")
done = false
while true do
pad = Controls.read()
if pad:cross() and done == false then

System.message("UMD ISO will be dumped in name 9660.ISO, if u have a UMD dumped by this app, rename the ISO in the memory stick. Are you ready to dump the UMD?",1)
button = System.buttonPressed(1) if button == "yes" then UMD.ripISO("ms0:/ISO/9660.ISO", green) end
button = System.buttonPressed(1) if button == "no" then System.Quit() end
done = true end
if done == false then

Ogg.load("SYSTEM/music/system.ogg")
Ogg.play()
screen:blit(0, 0, background, false)
screen:print(1, 1, "press X to Dump UMD Disk", white)
end

if pad:circle() and done == false then

System.message("Dumping a UMD video is diffrent than dumping a UMD game. To dump a UMD video, you must enter USB mode and dump it to the PC. When you have USB enabled for UMD drive, it will show up as UMD9660.iso, drag that to your PC and it will start dumping. Do you want to enable UMD USB mode now?",1)
button = System.buttonPressed(1) if button == "yes" then System.usbDevUMD() end
button = System.buttonPressed(1) if button == "no" then System.Quit() end
done = true end
if done == false then

screen:print(1, 10, "Press O to dump UMD video", white)
end

if pad:square() and done == false then

System.message("This will show the available amount of free space on your memory stick. Do you wish to continue?",1)
button = System.buttonPressed(1) if button == "yes" then System.getDevSize("ms0:") end
button = System.buttonPressed(1) if button == "no" then System.Quit() end
done = true end
if done == false then

screen:print(1, 20, "Press [] to see free space on memory stick", white)
end

if pad:start() and done == false then

System.message("WARNING! This will clock the Central Processing Unit to 20 MHz! Are you sure you want to proceed?",1)
button = System.buttonPressed(1) if button == "yes" then System.setcpuspeed(20) end
button = System.buttonPressed(1) if button == "no" then System.Quit() end
done = true end
if done == false then

screen:print(1, 30, "Press Start to clock CPU to 20 MHz", white)
end

if pad:select() and done == false then

System.message("This will clock the Central Processing Unit to 333 MHz, which is higher than default. Are you sure you want to proceed?",1)
button = System.buttonPressed(1) if button == "yes" then System.setcpuspeed(333) end
button = System.buttonPressed(1) if button == "no" then System.Quit() end
done = true end
if done == false then

screen:print(1, 40, "Press Select to Clock CPU to 333 MHz", white)
end

if pad:l() and done == false then

System.message("Are you sure you want to exit?",1)
button = System.buttonPressed(1) if button == "yes" then System.Quit() end
button = System.buttonPressed(1) if button == "no" then end
done = true end
if done == false then

screen:print(1, 50, "Press L trigger To exit", white)
end

if pad:r() and done == false then

System.message("You are about to shutdown the PSP. Do you want to proceed?",1)
button = System.buttonPressed(1) if button == "yes" then System.shutdown() end
button = System.buttonPressed(1) if button == "no" then end
done = true end
if done == false then

screen:print(1, 60, "Press R to Shutdown The system", white)
end

screen.waitVblankStart() 
screen.flip()
end

[FreePlay]

I would think it's rather obvious.

The way you have it now, once you set 'done' to true, it never becomes false again, so it never accepts more input.

Try moving 'done = false' below 'while true do'.

[ifiwere1337]

I would think it's rather obvious.

The way you have it now, once you set 'done' to true, it never becomes false again, so it never accepts more input.

Try moving 'done = false' below 'while true do'.

i didnt know you knew lua freeplay, i thought you only did c++

[omegaridley]

I would think it's rather obvious.

The way you have it now, once you set 'done' to true, it never becomes false again, so it never accepts more input.

Try moving 'done = false' below 'while true do'.

Thx freeplay, it now works!!!

but I still have other problems...

this code is supposed to show how much space I have left on my memory stick:

System.getDevSize("ms0:")

but it doesnt show anything...

anyone know?

[TurtlesPwn]

You dont have to "know" lua to look at and understand a script written in it - it looks like plain english to someone used to lowerlevel programming languages.

[omegaridley]

You dont have to "know" lua to look at and understand a script written in it - it looks like plain english to someone used to lowerlevel programming languages.

look, i only just turned 13, i know ALOT about programming, except for LUA.

I can do LUA pretty well, but i always seem to get errors...

[scryerth]

hi my psp screen shows up but the hud isn't working. if any one can help that would be great

[SG57]

look, i only just turned 13, i know ALOT about programming, except for LUA.

I can do LUA pretty well, but i always seem to get errors...

You're just proving Turtle's point even more by saying that... lol

scryeth - that is so vague we can't even begin to help you without atleast some code.

[scryerth]

what type of code

[FaT3oYCG]

are you sure you posted on the right thread lol
-= Double Post =-

Thx freeplay, it now works!!!

but I still have other problems...

this code is supposed to show how much space I have left on my memory stick:

System.getDevSize("ms0:")

but it doesnt show anything...

anyone know?

some pointers:

1. use a menu
2. System.getDevSize() only returns the size, to show it e.g. System.message(System.get DevSize(),0)
3. that code is bad
4. i made one of these just to test all of the functions here is the code

System.memclean()

System.usbDiskModeActivate()

white = Color.new(255, 255, 255)
red = Color.new(255,0,0)
green = Color.new(0,255,0)
blue = Color.new(0,0,255)

options = { "PSP Information", "Set Cpu Speed To 133", "Set Cpu Speed To 266", "Set Cpu Speed To 333", "Re-Load" }

current = 1

function printg(x, y, text, colour, display)
	if colour == nil then
		colour = Color.new(255, 255, 255)
	end
	if display == nil then
		display = screen
	end
	for xbg = -1, 1 do
		for ybg = -1, 1 do
			display:print(x + xbg, y + ybg, text, Color.new(0, 0, 0))
		end
	end
	display:print(x, y, text, colour)
end

function printgc(y, text, colour, display)
	if colour == nil then
		colour = Color.new(255, 255, 255)
	end
	if display == nil then
		display = screen
	end
	x = 240 - ((string.len(text) * 8) / 2)
	for xbg = -1, 1 do
		for ybg = -1, 1 do
			display:print(x + xbg, y + ybg, text, Color.new(0, 0, 0))
		end
	end
	display:print(x, y, text, colour)
end

function Display_Menu()
	for i = 1, table.getn(options) do
	printgc(30 + ((i - 1) *10), options[i], white)
	end
	printgc(30 + ((current - 1) * 10), options[current], green)
end

if System.powerGetBatteryChargingStatus() == 1 then
	bat_stat = "Charging"
else
	bat_stat = "In Use"
end

function Menu_Controls()
	if pad:up() and not oldpad:up() then
		if current > 1 then
			current = current - 1
		else
			current = table.getn(options)
		end
	elseif pad:down() and not oldpad:down() then
		if current < table.getn(options) then
			current = current + 1
		else
			current = 1
		end
	end

	if pad:cross() and not oldpad:cross() and current == 1 then
		System.message("PSP Version: " .. System.cfwVersion() .. "\nNick Name: " .. System.nickName() .. "\nBattery Status: " .. bat_stat .. "\nBattery Percentage: " .. System.powerGetBatteryLifePercent() .. "%" .. "\nTime Left: " .. System.powerGetBatteryLifeTime() .. "\nLua Player HM: V" .. System.playerVer(), 0)
	elseif pad:cross() and not oldpad:cross() and current == 2 then
		System.setLow()
	elseif pad:cross() and not oldpad:cross() and current == 3 then
		System.setReg()
	elseif pad:cross() and not oldpad:cross() and current == 4 then
		System.setHigh()
	elseif pad:cross() and not oldpad:cross() and current == 5 then
		dofile("./function_dump.lua")
	end
end

oldpad = Controls.read()

while true do

pad = Controls.read()

screen:clear(blue)

-- insert your main code here

printgc(10, "Lua Player HM Function Dump By [email protected]", green)

Display_Menu()
Menu_Controls()

printgc(260, "Hi " .. System.nickName(), green)

-- insert your main code here

if pad:start() then
	break
end

oldpad = pad

screen.waitVblankStart()
screen.flip()

end

[omegaridley]

thx [email protected], youve helped me yet again!


ur the best!!!

so now, what you told me should get the rest of my code to work.

this leaves me to 1 more question!

ok, on Ogg playback, the song I have only plays 1 time, How do I make it loop? here is the code I am using:

Ogg.load("SYSTEM/music/system.ogg")
Ogg.play

it works, the music plays, but it doesnt loop, so it only plays once

[FaT3oYCG]

looking at the commands in luaplayer hm for ogg files i would say it is probably one of these

Ogg.EndOfStream()
Ogg.songTime()
Ogg.mode()

[SG57]

Yes, looking at the source Ogg.EndOfStream() returns a string "true" when an Ogg file has finished playing so just put in your main loop:

if Ogg.EndOfStream() == "true" then
  Ogg.play()
end

[omegaridley]

Yes, looking at the source Ogg.EndOfStream() returns a string "true" when an Ogg file has finished playing so just put in your main loop:

if Ogg.EndOfStream() == "true" then
  Ogg.play()
end

ok, i understand now, but after I put in that line of code, it game me this error:

:16: attempt to call field 'EndOfStream' (a nil value)

here is line 16:

if Ogg.EndOfStream() == "true" then

it wont work, and the functions.txt even shows the function!!!

any ideas?

[PSProgramer]

did you acctually put code after

if Ogg.EndOfStream() == "true" then

??
or is that it?
cause if thats all you put, then you need to add
Ogg.play() end

[omegaridley]

did you acctually put code after

if Ogg.EndOfStream() == "true" then

??
or is that it?
cause if thats all you put, then you need to add
Ogg.play() end

yes, i put code after

if Ogg.EndOfStream() == "true" then

and it still isnt working...

[SG57]

Do you have an Ogg loaded? Looking at the source code of LP, the eof integer is initialized to 0 when an Ogg is loaded so trying to access it before an Ogg is loaded will return nil..

[omegaridley]

Do you have an Ogg loaded? Looking at the source code of LP, the eof integer is initialized to 0 when an Ogg is loaded so trying to access it before an Ogg is loaded will return nil..

so ur saying to load the Ogg AFTER this code is executed?:

if Ogg.EndOfStream() == "true" then

cause, i can easily move the loading code below it
-= Double Post =-

so ur saying to load the Ogg AFTER this code is executed?:

if Ogg.EndOfStream() == "true" then

cause, i can easily move the loading code below it

no that didnt work either, i dont understand, is it a bug

i am using LuaPlayerHM v6.6, and the code u have me is in the functions list!