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Forum: Pentax DSLR Discussion 02-23-2019, 03:55 AM  
Resurrecting Pentax firmware hacking
Posted By tempelorg
Replies: 765
Views: 237,999
I can confirm that while I can enter the Debug mode in my K-1 Mk II, using the Lens features has no effect, just like with my K-3. Only the K-5's the Lens functions work for me (meaning I know how to use them).

Bootcoder clearly sounds frustrated. Sure, he's doing all the work, but that alone should not cause his reactions here. Something else seems to be bothering him, and it would be nice if he would speak up about that, in case we can do something about it.
Forum: Pentax K-1 02-11-2019, 01:51 PM  
Please help K1 II debug mode.
Posted By tempelorg
Replies: 7
Views: 897
So, no one actually knows the answer to the topic's question, i.e. how to enable Debug Mode on a K-1 II? I came here for that answer.

(Beholder3 - no, your linked solution does not appear to work on a K-1 II, not in my attempts, anyway)
Forum: Pentax DSLR Discussion 02-11-2019, 01:49 PM  
Resurrecting Pentax firmware hacking
Posted By tempelorg
Replies: 765
Views: 237,999
Tried that on my K-1 II - with door open and holding the Menu button: When then turning it on, the display remains black, same as if I had no files on the SD card. Tried both hex sequences. (And yes, I know how to use a hex editor, I wrote more than one myself ;) )

I guess the file names (and/or hex codes) have changed for the K-1 II again. Anyone know them?
Forum: Pentax K-5 01-17-2019, 11:40 PM  
Pentax K-5 and external HDMI LCD screen
Posted By tempelorg
Replies: 116
Views: 29,155
When I google "andycine 4k monitor", I only find 1920x1080 screens, not 4K (which would be twice the width). Could you provide a website link, please?
Forum: Pentax K-5 09-23-2016, 01:09 AM  
Lens release button replacement
Posted By tempelorg
Replies: 70
Views: 22,440
Borrelli, thank you for detailing the disassembly in the other thread. Though, it's a bummer that this requires removal of the top and fronts as well - I don't like working with glued-on parts, because re-attaching them after removal is never working well for me. I have no idea where to find the proper glues here in Germany. I used to try several glues I got at hobby places (where they sell self-assembly miniature planes etc.), but nothing worked reliably. I may just save me all the hassle and send it in, though 90€ is a high price when a complete body is now sold used for less than 250€.

But enough of my whining. I know what my options are now. And it's now also clear that the C ring ("circlip") from uscamera is a plastic piece, more likely to break in the future again. Finding or constructing one from metal might be the smarter idea for anyone going down the DIY path.

Rick_B's foam solution post is here, BTW: https://www.pentaxforums.com/forums/115-pentax-k-5/189715-lens-release-button...ml#post2967996. It assumes that you still have (or purchase from uscamera, see http://uscamera.com/77240-a107.htm) the original button part, while you won't need the circlip nor the rubbery cone for his solution, if I understand it correctly. It's similar to gluing the cone to the button and to the camera body, but less messy, I suspect.
Forum: Pentax K-5 09-22-2016, 02:59 AM  
Lens release button replacement
Posted By tempelorg
Replies: 70
Views: 22,440
As I'm in Germany, buying the parts (with rather expensive shipping of $18) adds up to half of what I'd have to pay for a professional replacement by Foto Maerz in Germany. So I'll wait for someone else to report success with these parts before I decide whether to go that route or rather have the pros do it (fortunately, I still have a K20D and a K3 to work with).

Oh, and the service in Germany informed me that the replacement button would now be using a metal instead of a plastic part, making it less likely to come off again in the future.

I also suspect that this new C ring part goes at the end of the pin, i.e. inside the camera frame, meaning we'd have to disassemble it. I wonder if anyone who repaired this piece also did open the camera case in order to put a generic C ring onto the pin's end that way, instead of using glue on the cone shaped part? I could not find any message on this board that confirmed this, though.

So, if anyone has tried this with a generic C ring or this new C ring part, let us all know here, please!
Forum: Pentax K-5 09-21-2016, 11:06 AM  
Lens release button replacement
Posted By tempelorg
Replies: 70
Views: 22,440
I, too, just lost the button on my K-5. I checked the USCamera site (Pentax Genuine K5 Replacement Spare Parts | uscamera.com) and see that they now list also a "K5 Lens Lock Button Retaining Clip".

Previous posts here only mentioned the other two parts, and suggested that they'd have to be secured with a bit of glue, which isn't perfect.

Has anyone tried the new clip yet? Are those three pieces all one needs to re-attach the button without glue and without disassembling the camera?
Forum: Pentax Camera and Field Accessories 08-28-2016, 04:09 AM  
Flucard hacking / reverse engineering
Posted By tempelorg
Replies: 52
Views: 9,372
Read again, redcat - that was a goal. I never succeeded in that. See post #28 for details.
Forum: Pentax Camera and Field Accessories 06-02-2015, 12:18 PM  
Flucard hacking / reverse engineering
Posted By tempelorg
Replies: 52
Views: 9,372
Yes and yes. But an Eye-Fi card does not communicate with Pentax cameras. It only provides a file server to the files it has stored on its Flash drive.

So I don't think it'll help us in any way.

I ran into a more serious problem with the Flucard, though. I modified only the startup script a little by turning off the buzzer. I don't believe I've made any changes to the network (wireless) setup scripts. Yet, after these changes, even though the Linux system comes up fine, the http server on the card doesn't work any more - but the WLAN hotspot still works, ie. I can connec to the card's Wifi network and get an IP via DHCP assigned, but connecting to the web server times out.

I wonder if Pentax has added a second hacking protection level there, checking if the initramfs or parts of it have been messed with. After all, the "code" subdir of the firmware update for the Flucard contains some cryptic files, and one of them ("version") kind of looks as if it contains a MD5 or SHA checksum: 76 CA C9 9B 96 ED 9B 9E 30 60 B8 81 13 C5 0C 18 2E 60 C8 71 03 06 8B 18 30

The code inside "index.html" is also encoded or encrypted, no idea yet how.

The file "html", also part of the firmware updater, is an ELF executable that contains a reference to the "/code/version" file, so I guess I'd have to look there to see what this file is about. But not anytime soon, got some other things on my mind right now.
Forum: Pentax Camera and Field Accessories 06-02-2015, 11:42 AM  
Flucard hacking / reverse engineering
Posted By tempelorg
Replies: 52
Views: 9,372
I have no idea how the Eye-Fi system works internally. It's not even clear if it uses a similar Linux setup. All the articles that talk about the Linux on the Flucard and Transcend cards never mentions that this is similar to Eye-Fi, so I doubt I can get into the Eye-Fi system as easily as into the Flucard. They're obviously not sharing the same setup.

What does your code show? Is that from the camera side again? The strings suggest that it's probably not. So, did you disassemble the busybux of the Flucard here or what are we looking at?
Forum: Pentax DSLR Discussion 05-31-2015, 01:26 PM  
Screen not matching Sensor focus plane
Posted By tempelorg
Replies: 9
Views: 1,182
Fred, whatever you say. But that's besides the point. I like to keep the discussion on the original topic and not get sidetracked on policies, so please let's just drop this business about whether the card needs to be removed for service. It's an advice I've received but please let's get back on topic.
Forum: Pentax DSLR Discussion 05-31-2015, 10:32 AM  
Screen not matching Sensor focus plane
Posted By tempelorg
Replies: 9
Views: 1,182
If both the screen and the phase-detection AF are out of focus, then it can't be the screen. So, Pentax would have no right to claim that the 3rd party screen could cause this. Plus, putting a screen in is not an unsanctioned hack either. But yes, I would not send in the camera with the KatzEye screen anyway, for the same reason I wouldn't include my SD Card or other non-essential parts.

JimmyDranox makes an interesting point. I do not agree with that, though, because if the secondary mirror would be out of line, then that would only affect the AF sensor but not the screen.

I just don't want to send in the camera right now if there's possibly an easy fix as I need it in 3 weeks and I have my doubts I'd get it back by then.

However, I have found a discussion thread, at dpreview, I believe, where someone quite familiar with Pentax repair manuals, claimed that it's rather normal that the mirror system ages and shifts over the years, and says that that's the reason why Pentax offers a tune-up and suggests to have the body serviced regularly (in 1-2 year intervals). He also explained that the body has active compensations depending on the temperature for that, too. The thread was about the K-10D, but I wonder if the same still applies, if it's true what he wrote.

I cannot find the thread again but I found this with a nice picture of showing the whole mirror + AF system in case someone here hasn't seen it yet:

Re: Badly aligned focus on K10D - tested!: Pentax SLR Talk Forum: Digital Photography Review

But at least I found the post I had in mind when I asked about making adjustments myself. See here:

RiceHigh's Pentax Blog: Hardware Adjust a Pentax DSLR for the AF

Still, I guess I'd need the K-3 service manual for that, and that's rather difficult to find.
Forum: Pentax DSLR Discussion 05-31-2015, 01:35 AM  
Screen not matching Sensor focus plane
Posted By tempelorg
Replies: 9
Views: 1,182
I am using a KatzEye Focusing Screen with my K-3.
Until recently, all was good - when the screen's split prism showed a perfect focus, the image was in focus as well.

But today I noticed that all the lenses are font focusing: Both when using Phase-detection-AF and when using the screen for manual focusing.

I wonder what could have happened there. I did not drop this camera. I also kept it in moderate (room) temperature all this time.

Since both the PD-AF and the screen are off by the same amount, I also conclude that it's not the screen that has moved. It's probably the mirror position that has shifted, as only that would affect both, am I right?

Now I wonder what to do. Send in the camera? Would that be a clear warranty case?

Alternatively, does someone know if opening the camera at the bottom gives relatively easy access to the adjustments for the mirror position? Or is that something one cannot do without lab equipment?
Forum: Pentax Camera and Field Accessories 05-25-2015, 08:36 AM  
Flucard hacking / reverse engineering
Posted By tempelorg
Replies: 52
Views: 9,372
I was hoping not having to do everything myself ;)
Forum: Pentax Camera and Field Accessories 05-25-2015, 08:11 AM  
Flucard hacking / reverse engineering
Posted By tempelorg
Replies: 52
Views: 9,372
The thread at Openwrt shows hwo one can hook into the card's serial port. But that requires some hardware hacking and fine soldering skills. I am not ready for that yet. For now, I hope to find a working example by someone who has already done the wifi setup with a Flucard or similar card.
Forum: Pentax Camera and Field Accessories 05-25-2015, 03:56 AM  
Flucard hacking / reverse engineering
Posted By tempelorg
Replies: 52
Views: 9,372
I dug around a little to figure out how to connect to an existing Wifi AP. Found out that there are quite a few wifi related scripts left on the card (called, w1, w2, ... w6) but I cannot figure out how to use them (see my article). Instructions how to set this up on a Linux system, like this one (PQI_Air_Card - PQI Air Card????????????????????? - Qiita) do not even work because the card's file system has no egrep nor perl installed. The other problem is that I can do this only blindly - once I try to get it to connect to an AP, I lose my current Wifi connection of course, and so I cannot see any output or enter new commands. Darn.
Forum: Pentax Camera and Field Accessories 05-24-2015, 02:27 PM  
Flucard hacking / reverse engineering
Posted By tempelorg
Replies: 52
Views: 9,372
@anemone - that may be so for full-fledged Linux system, but this tiny Linux does not use a secondary rootfs. It runs entirely and constantly from the system inside initramfs. I have been looking around with Telnet on the running system, believe me :)
Forum: Pentax Camera and Field Accessories 05-24-2015, 01:20 PM  
Flucard hacking / reverse engineering
Posted By tempelorg
Replies: 52
Views: 9,372
Today I've tried to modify the "rcS" startup script (inside /etc/init.d/), removing the excessive buzzing and disabling the deletion of the autorun.sh file.

I even wrote a GUI app that takes care of unpacking and repacking the initramfs.gz, preserving all files that I didn't modify. However, this didn't work.

The firmware updaters started doing its work (with a lot of noise from the buzzer), but in the end I had still the same old firmware installed on it, with the same buzzer tones.

I wonder if I need to update more than just the initramfs3.gz file. For instance, there's a "version" file inside the "code" dir, which contains 25 bytes. But I cannot make any sense of them, there's no clear version code or file length in it that might relate to my changes. But it would make sense that the updater code first checks if it has already installed the same version, and then skips installation.

I guess that at this point I'd have to look into the executables to figure out what's happening. Not going to happen soon, though.

Anyone have any input on this? All the other hacks on linux-based Wifi cards to not mention changing anything besides the initramfs as far as I can tell.

---------- Post added 24th May 2015 at 22:54 ----------

Good news! Now it works. I had to add padding to the end of the initramfs file (I pad to a full 512 block size now).
I can now replace the Linux files and store them permanently on the Flucard.

Next would be to make it log in to an existing Wifi Access Point. Is someone here with Linux Skills who can help me with that? For a start, I'd like to set it up so that it first looks for a specific AP and tries to log in to it (with a WPA2 pw), and if that doesn't work, it reverts back to its default mode where it offers its own AP. I have no idea how to do that, and it may also be that this crippled Linux doesn't even contain all the necessary libs for it yet.
Forum: Pentax DSLR Discussion 05-22-2015, 06:42 AM  
Resurrecting Pentax firmware hacking
Posted By tempelorg
Replies: 765
Views: 237,999
pasorro, my K-5 has an empty "DEVELOP.MOD" file and two files named "00077430.505" and "00077760.502", both with just "[OPEN_DEBUG_MENU]" inside. All files stored at the root of the SD card. I put that card into the K-5, leave the door open and turn the camera on. That opens the debug menu. No need for pktether.

It looks like you put the text into the wrong file.
Forum: Pentax Camera and Field Accessories 05-22-2015, 06:39 AM  
Flucard hacking / reverse engineering
Posted By tempelorg
Replies: 52
Views: 9,372
Does the S1's firmware contain the actual C++ symbol names such as HttpRequestCapture:...? That's ultra cool. I have to get my hands on that... I wonder if the K-3's has the same symbols. Will check over the weekend.
Forum: Pentax Camera and Field Accessories 05-21-2015, 06:14 PM  
Flucard hacking / reverse engineering
Posted By tempelorg
Replies: 52
Views: 9,372
Is that code from the busybox in the card or from the firmware on the camera?
Forum: Pentax Camera and Field Accessories 05-21-2015, 01:56 AM  
Flucard hacking / reverse engineering
Posted By tempelorg
Replies: 52
Views: 9,372
Thanks, I've updated my article.

How did you know? You don't have a Flucard, do you?
Forum: Pentax Camera and Field Accessories 05-19-2015, 09:42 PM  
Flucard hacking / reverse engineering
Posted By tempelorg
Replies: 52
Views: 9,372
That web site is dead, though. None of the links work. I point out a working link into archive.org on my article, though.
I guess the "Flucard Pro" mode, if it's still implemented in the Pentax version (some commands are disabled), is then turning the card into a Eye-Fi-like card, but a worse working one :)
Forum: Pentax DSLR Discussion 05-19-2015, 10:06 AM  
Resurrecting Pentax firmware hacking
Posted By tempelorg
Replies: 765
Views: 237,999
Has anyone tried to read the Lens data from a K-3? Because I tried and it doesn't seem to work - choosing the "LENS ROM DAT CAMERA=>SD" command from the debug menu doesn't write a file, and the display only flickers very briefly when pressing the OK button. On the other hand, on my K-5, the same command works, with the screen blacking out for about a second during the operation.

I wonder if this feature has been disabled in the firmware or if it's just me. I'd like to know if others tried and had success with the K-3.
Forum: Pentax Camera and Field Accessories 05-19-2015, 08:36 AM  
Flucard hacking / reverse engineering
Posted By tempelorg
Replies: 52
Views: 9,372
Yes, I say so in my article :)

Thanks for the links, BTW. There was some valuable stuff in there, especially the forum thread on openwrt.org.


Haha - That was one of my early hacks - I actually wrote a replacement file system for the CP/M cartridge for the C-64. Ah, those were the times when computers were still easy to understand...
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