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help: how to debug script interrupting?

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Offline Alarik

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help: how to debug script interrupting?
« on: 01 / July / 2012, 09:31:02 »
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Hi all,
I have a lua script (quite complex)
sometimes it interrupts by itself showing
"PRESS SHUTTER TO CLOSE"
nothing more, no errors code, etc...

I'm running the script on 60 cameras and it is absolutly random,
it happens on some cams and on some not...
sometimes it happen after a minute
sometimes after 20 minutes
sometimes it doesn't happen at all...
(different for each cam where it happens...)

I really cant figure out how to debug this problem...
any advice?

thanks
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Offline waterwingz

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Re: help: how to debug script interrupting?
« Reply #1 on: 01 / July / 2012, 10:20:19 »
Telling us your camera model and posting a copy of the script might be a good place to start ?
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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline Alarik

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Re: help: how to debug script interrupting?
« Reply #2 on: 01 / July / 2012, 10:34:51 »
ok, sorry,

cam is Canon SX130IS

the script where the problem sometimes happens, sometimes not is:
(actually the script is much longer but other parts are never reached or called)

--[[
@title SCRIPT_TEST
]]

function waitForSetMenu()
    local x = 0
    local p = 0
    local pressTime = 0
    local pulseTime = 0
    local menuItem = 0
   
    print(" READY ")
   
   
    while x < 1 do
        sleep(100)
        if is_pressed("remote") then
            if p < 1 then
                pressTime = r_get_tick_count()
                p = 1
            else
                pulseTime = r_get_tick_count()
                if (pulseTime-pressTime > 1000) then
                    pressTime = pulseTime
                    play_sound(4)
                    menuItem = menuItem +1
                    print("")
                    print("CURRENT CFG = ",menuItem)
                    sleep(100)
                end 
            end
        else
            if p > 0 then
                x = 1
            end
        end
    end
end

local retVal = waitForSetMenu()
print("CHOOSED CFG IS = "..retVal)

the problem raises even if I dont do anything (no press buttons, remote, etc...)

thanks
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Offline waterwingz

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Re: help: how to debug script interrupting?
« Reply #3 on: 01 / July / 2012, 10:46:04 »
Is this the entire script you are testing at this point ? 

If you want to paste longer scripts in,  use the wiki editor # button on the tool bar - you'll get a nice scrolling text box when your script is displayed.  Like this :

Code: [Select]
--[[
@title SCRIPT_TEST
]]

function waitForSetMenu()
    local x = 0
    local p = 0
    local pressTime = 0
    local pulseTime = 0
    local menuItem = 0
   
    print(" READY ")
   
   
    while x < 1 do
        sleep(100)
        if is_pressed("remote") then
            if p < 1 then
                pressTime = r_get_tick_count()
                p = 1
            else
                pulseTime = r_get_tick_count()
                if (pulseTime-pressTime > 1000) then
                    pressTime = pulseTime
                    play_sound(4)
                    menuItem = menuItem +1
                    print("")
                    print("CURRENT CFG = ",menuItem)
                    sleep(100)
                end 
            end
        else
            if p > 0 then
                x = 1
            end
        end
    end
end

local retVal = waitForSetMenu()
print("CHOOSED CFG IS = "..retVal)

And while its probably not what's causing your issue,  you don't seem to have a "return" statement in your function yet the second to last line expects something in retVal ?

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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline Alarik

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Re: help: how to debug script interrupting?
« Reply #4 on: 01 / July / 2012, 11:14:50 »
sorry I forgot to copy last line

-> return menuItem

that's not the problem as you guessed.

As the script starts it goes in the while loop
and since I dont press anything
it loops forever (till, sometimes, crashes without reasons).

there are a lot of other code & functions in the actual script
but those are never executed/reached (since I just loop forever till a crash)

thanks for the wiki editor tip.
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Offline waterwingz

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    • Waterwingz
Re: help: how to debug script interrupting?
« Reply #5 on: 01 / July / 2012, 11:21:54 »
Quote from: Alarik on 01 / July / 2012, 11:14:50
sorry I forgot to copy last line

-> return menuItem


Ummm ... that doesn't go on the "last line".   It needs to be up in the function somewhere.

Quote
that's not the problem as you guessed.

As the script starts it goes in the while loop
and since I dont press anything
it loops forever (till, sometimes, crashes without reasons).

there are a lot of other code & functions in the actual script
but those are never executed/reached (since I just loop forever till a crash)
Understood -  as long as you never press anything,  it should loop forever.   So that code is not the problem.   

Other possible problems ?  The script is too big and causes a random crash maybe ?  There is actually something else in the code that you are SURE never gets executed but actually does ?   Hence the question about seeing the whole script.

What happens if you just try to run the snippet you posted as a simple script ?

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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline Alarik

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Re: help: how to debug script interrupting?
« Reply #6 on: 01 / July / 2012, 12:41:14 »
Quote
Ummm ... that doesn't go on the "last line".   It needs to be up in the function somewhere.

yeah, sorry I meant "last line of the function before the end...".

However I'll adopt your suggestion and let run a simple script with just the code I wrote to see if things change.

I'll write results as soon as available

Thanks for support.
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Offline Alarik

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Re: help: how to debug script interrupting?
« Reply #7 on: 01 / July / 2012, 13:20:45 »
ok,
so the problem arise also in the little code snippet
after about 7 minutes one of my camera exited from script
saying "PRESS SHUTTER TO CLOSE" and nothing more.

This is the complete script I've been running:

Code: [Select]
--[[
@title Rtest (01.07.12)
]]



function waitForSetMenu()
    local x = 0
    local p = 0
    local pressTime = 0
    local pulseTime = 0
    local menuItem = 0
 
    print("START")
   
    while x < 1 do
        sleep(100)
        if is_pressed("remote") then
            if p < 1 then
                pressTime = r_get_tick_count()
                p = 1
            else
                pulseTime = r_get_tick_count()
                if (pulseTime-pressTime > 1000) then
                    pressTime = pulseTime
                    play_sound(4)
                    menuItem = menuItem +1
                    print("")
                    print("CURRENT CFG = ",menuItem)
                    sleep(100)
                end 
            end
        else
            if p > 0 then
                x = 1
            end
        end
    end   
   
    return menuItem
end



local rv = waitForSetMenu()
print("VALUE = "..rv)
   

the only "place" where I can guess ther error is, is the "is_pressed" function...
which is the only one really used in the loop

i will try now to use
wait_click(100)
if is_key("remote") then ...

instead of
sleep(100)
if is_pressed("remote") then ...

thanks for any advice...
« Last Edit: 01 / July / 2012, 13:31:15 by Alarik »
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Offline waterwingz

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Re: help: how to debug script interrupting?
« Reply #8 on: 01 / July / 2012, 13:45:23 »
Two questions :

1) Will your cameras stay running if you just put them in a simple "sleep" loop

Code: [Select]
@title Test
do
   sleep(1000)
until ( 0 )

or

Code: [Select]
--[[
@title R1test
]]

function waitForSetMenu()
    repeat
        sleep(1000)
    until ( false )   
    return menuItem
end

local rv = waitForSetMenu()
print("VALUE = "..rv)
The first one is obviously in uBASIC.   When I was porting the SD940, using function calls in Lua would make it crash.  I forget what finally fixed that - there were lots of weird things going on during the early days of my first porting attempt.


2) I assume you've disable the built-in "automatic shutdown" function that Canon provides ?
« Last Edit: 01 / July / 2012, 13:50:02 by waterwingz »
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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline reyalp

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Re: help: how to debug script interrupting?
« Reply #9 on: 01 / July / 2012, 14:26:16 »
The usual way to debug this kind of thing would be to throw prints in the different conditions to see what path it is taking. If that would be to voluminous, you can use lua io to log to a file, or record your state in variables and output it in the "restore" function that's called on script terminate (if there's a real chdk bug, restore might not be called, of course)
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