CHDK PTP interface

msl

PTP support for a610 100f and sx10 102b by CHDKLover

whoever

Before too late, I'd suggest to conduct a little discussion on how we actually want it, and whether we want it at all. CHDK PTP, that is. In other words, to formulate a standard if you wish. Does CHDK PTP go into the mainstream, or only remains in personal builds? If it makes it to the trunk, then in which shape? Etc.

(My personal point of view is pretty close to mweerden's: I'd suggest his well-documented implementation to become standard, with small modifications on both the camera side and in ptpcam. Note that ptpcam is easily portable to any platform, and that the basic implementation on the camera side only requires one function address.)

ewavr

@msl:
I successfully tested my program under Win7 32-bit.
Libusb-win32 installation instructions under Vista - http://lejos.sourceforge.net/forum/viewtopic.php?t=541
Unfortunately, in this case the libusb-win32 driver completely replaces the standard Windows PTP driver.
To intall webcam driver under Win7, UAC system must be disabled at the time of installation of the driver.

msl

Thanks for this informations, ewavr.

rudi (from german CHDK forum) has made a not tested a590 100e version for a better compiler compatibility because of the exceptions in camera.h.

rudi

Today, I tested the newest CHDKCAM and ewavr's BIN, but the "Shooting mode"-Box are empty.

Hint:
Answer "modes_script" form "main.cpp": > 0000000000000017631c30b7e <

Can you check this? Thanks!

ewavr

rudi
Today, I tested the newest CHDKCAM and ewavr's BIN, but the "Shooting mode"-Box are empty.
Hint:
Answer "modes_script" form "main.cpp": > 0000000000000017631c30b7e <
Can you check this? Thanks!

Maybe delay for script execution was too small for your camera 🙁
Now I uploaded PC client with bigger delay, try it.
At present we cannot read script execution state, but this is planned.

rudi

Thanks for your fast answer.

Now I tested the new chdkcam. Usually I start the PC client at first and then the camera. In this moment show me the client an error-box without any message. After "OK" it works. I looking for cause - the messagebox is show after each turn on the camera.
Then I tested your previous client-version (03.12.09) again and it works also!?!

I'm sorry. It was a mistake on my part!

Now I know: "start at first the camera and then the application"

OK, the previous client-version is the better one.

ewavr

rudi
In this moment show me the client an error-box without any message. After "OK" it works.

Oops! Fixed (maybe).

Now I know: "start at first the camera and then the application"

Just after connecting PC client executes some scripts in camera to read its capabilities (maximum zoom value and available shooting modes). Maybe we need some delay between these events.
p.s. In your camera script autostart is off?

rudi

ewavr wrote:
p.s. In your camera script autostart is off?

Yes, it is.

m.rump

First of all: Thanks mweerden for the great work!

I located the PTP functions in the G9 1.00d firmware, if anyone else is interested:

NHSTUB(add_ptp_handler, 0xFF8D897C) // via ptp handler table
NHSTUB(get_ptp_handler_entry, 0xFF8D8F9😎 // via add_ptp_handler
NHSTUB(get_ptp_handler, 0xFF8D8B10) // directly below get_ptp_handler_entry
NHSTUB(rem_ptp_handler, 0xFF8D8A6😎 // directly below add_ptp_handler

leedsgreen

I really don't know how you guys do it. But thanks so much for doing it! It never ceases to amaze me what you come up with 😛
I've dreamt of buying camera with Remote Capture ability but now I don't need to, my a710is can do it all! Just loaded up tonight and got it working 🧑‍🎄

Thanks again (and again),

Nick

ynaig

Is there a chdk build for A550 that I can test the PTP functionality?

Ynaig

leedsgreen

If I may ask a couple of questions?

1. Is it possible to flick through taken images in 'playback' mode without physicaly touching the camera?

2. Is it possible to zoom into an image during 'playback' mode without touching the camera? For example, is there anyway of manipulating the 'zoom slider' so that a taken image can be looked at in more detail?

The reason I ask is that I use my camera afocally on telescope and the less in can be touched the better (i.e. to maintain alignment etc).

Thanks very much,

Nick

ewavr

leedsgreen
1. Is it possible to flick through taken images in 'playback' mode without physicaly touching the camera?
2. Is it possible to zoom into an image during 'playback' mode without touching the camera? For example, is there anyway of manipulating the 'zoom slider' so that a taken image can be looked at in more detail?

You can use keys on numeric keypad for this (with numlock on):
4,8,6,2,5 as arrow keys and "set"
0 as "video" (for sx10)
"+" and "-" as zoom keys
9 and 3 as "shoot_half" and "shoot_full"
"." as "menu"
"*" as "*/erase"
"/" as "disp"

and you have 12 programmable keys (F1-F12) to run user scripts.

leedsgreen

Wow! Thanks ewavr.

If not too much trouble, can you tell me how to load user scripts into system. I was pressing F keys last night but couldn't work how to connect to my different scripts.

Thanks again,

Nick

Marcio Lima

Does anybody knows the entry pont of the SX200 PTP functions ?

leedsgreen

Dear All,

I've managed to enter basic scripts into the editor of chdkcam as well as assign them to a programmable key. However, whilst some commands appear to work, others don't. For example:

press "shoot_half"
press "shoot_full"
release "shoot_full"
release "shoot_half"

Enables a single shot to be taken. However when I add a 'sleep' command, the editor doesn't appear to accept it or make use of it. Other uBasic commands (such as n=1 to 10) appear to be misunderstood.

Is this expected or do I need to write code slightly differently to my normal scripts?

Thanks for any help,

Nick

whoever

leedsgreen
Other uBasic commands (such as n=1 to 10) appear to be misunderstood.

Ewavr's builds (used to) only interpret Lua thru PTP, not uBasic. Therefore, you have to use pure Lua. Not sure about 'press "shoot_half"' though -- isn't Lua supposed to understand that? Otherwise try press("shoot_half") instead. Hope that helps.

leedsgreen

Thanks so much Whoever, have now sorted out scripts with Lua code. Fantastic!

Nick

whoever

leedsgreen
have now sorted out scripts with Lua code. Fantastic!
Nick

Great to hear that your astrophotography setup gets perfect shape, Nick!
Would you consider submitting a short write-up on your setup and results to "Creative uses" or elsewhere? It'd inspire the folks. And it'd bring more attention to this CHDK PTP hack, which is unjustly overlooked by most, while being -- as I believe -- a major breakthrough.
/Alex

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