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SX280 / 275 / 270 porting

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Offline grandgreed

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Re: SX280 / 275 / 270 porting
« Reply #230 on: 04 / October / 2015, 15:03:30 »
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Solution about video recording issue from russian forum. Translated.
Quote
FRIENDS. To READ to ALL. Concerning the battery. The problem is solved. Also as well as many I faced a shutdown problem during shooting. At most it was disconnected in 1 min. with a zoom. I blinked batteries and everything, shutdown. In responses I read that one person (God grant to him health) stuck the middle plug on the battery with a simple insulating tape and everything works. Tested myself. REALLY WORKS. But I went further away. If to stick on the battery, from the standard charger it isn't loaded. And IF ACCURATELY THIN SCREW-DRIVER IN the CAMERA to BEND the CENTRAL SHORT MOUSTACHE, EVERYTHING WILL be ABSOLUTELY good. I WILL REPEAT... ACCURATELY. Result. Video on original batteries with approach and removal of a zoom each 10 seconds 39 MINUTES, With Chinese batteries, bought in addition and not used 8 months, there are 26 minutes is shot. TOTAL it is MORE THAN A HOUR. And it I will repeat, playing with a zoom each 10 seconds.
THANKS to the KIND PERSON FOR IT. I think not one camera will return to work now. I will be very glad if I helped somebody.
« Last Edit: 04 / October / 2015, 15:09:49 by grandgreed »
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Offline reyalp

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Re: SX280 / 275 / 270 porting
« Reply #231 on: 04 / October / 2015, 15:50:03 »
Quote
Solution about video recording issue from russian forum. Translated.
This solution seems a bit unlikely to me. The third battery terminal should just be a thermistor, or perhaps a resistor on cheap imitation batteries. It's not impossible this could cause some electrical issue, but if so, it seems like Canon would have been able to come up with a more effective solution than has been generally reported.

I'd definitely suggest trying the tape method before trying to modifying the camera battery contacts. Nevertheless, it would be interesting to hear if it works for other users.
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Offline srsa_4c

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Re: SX280 / 275 / 270 porting
« Reply #232 on: 04 / October / 2015, 16:36:32 »
That's funny  :)

Taped down the middle contact on a battery. That makes the camera read the battery temperature as -20 degrees C. And indeed, I was able to record minutes of video with a battery that was nearly depleted at the start. Voltage reading fell below 2.8 V at the end and the camera still did not declare "battery low". And then ... it just crashed while recording. So, the method seems to be working, but one has to watch the battery voltage and shut down the camera before it crashes.
I'd like to note that Li batteries don't like to be discharged this much, so it's better to stop before voltage reading falls below 3.2 V (actual battery voltage is approx. 0.2 V higher).

The charger won't accept the battery if the middle terminal is taped.
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Offline waterwingz

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Re: SX280 / 275 / 270 porting
« Reply #233 on: 04 / October / 2015, 17:03:11 »
Quote from: reyalp on 04 / October / 2015, 15:50:03
This solution seems a bit unlikely to me. The third battery terminal should just be a thermistor, or perhaps a resistor on cheap imitation batteries. It's not impossible this could cause some electrical issue, but if so, it seems like Canon would have been able to come up with a more effective solution than has been generally reported.
Well, a battery will tend to "warm up" as current is continuously drawn in video mode.  If the camera is actually monitoring the thermistor then it may very well decide the battery is getting too warm and so it shuts down.   Seems like Canon would have figured that out and fixed it.  Unless the temperature rise is actually real and a bad enough thing (i.e. camera draws too much current due to bad design) and so they can't fix it without the risk of fires & battery explosions.   

Something to bear in mind if someone disables the third terminal just to get more recording time - Li battery melt downs are nasty.  Google it.

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Offline ahull

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Re: SX280 / 275 / 270 porting
« Reply #234 on: 11 / October / 2015, 07:51:56 »
Quote from: waterwingz on 04 / October / 2015, 17:03:11
Quote from: reyalp on 04 / October / 2015, 15:50:03
This solution seems a bit unlikely to me. The third battery terminal should just be a thermistor, or perhaps a resistor on cheap imitation batteries. It's not impossible this could cause some electrical issue, but if so, it seems like Canon would have been able to come up with a more effective solution than has been generally reported.
Well, a battery will tend to "warm up" as current is continuously drawn in video mode.  If the camera is actually monitoring the thermistor then it may very well decide the battery is getting too warm and so it shuts down.   Seems like Canon would have figured that out and fixed it.  Unless the temperature rise is actually real and a bad enough thing (i.e. camera draws too much current due to bad design) and so they can't fix it without the risk of fires & battery explosions.   

Something to bear in mind if someone disables the third terminal just to get more recording time - Li battery melt downs are nasty.  Google it.

Most of the cheap clone batteries don't actually have a thermistor in them, they typically either have a 10k Ohm resistor or nothing at all connected to the center tab. In which case, you would expect them to be unaffected by this issue (but more prone to overheating).
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Offline alvm

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Re: SX280 / 275 / 270 porting
« Reply #235 on: 22 / November / 2015, 16:24:19 »
Hello,

I  try to make latest project chdk from repo for sx280 but I get errors
"error makefile 14: command syntax error"
..........................................
*** 17 errors during make ***

Srting 14 in makefile is empty.

I use Window 7, MAKE version 5.2

Could you help me solve this problem, please?

Thanks,
Alex.
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Offline reyalp

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Re: SX280 / 275 / 270 porting
« Reply #236 on: 22 / November / 2015, 17:36:17 »
Quote from: alvm on 22 / November / 2015, 16:24:19
Hello,

I  try to make latest project chdk from repo for sx280 but I get errors
"error makefile 14: command syntax error"
..........................................
*** 17 errors during make ***

Srting 14 in makefile is empty.

I use Window 7, MAKE version 5.2
The CHDK build system is only compatible with GNU make. AFAIK there is no version 5 of GNU make yet, so you probably have some other make on your path. I'd suggest using the build enviroment supplied with CHDK shell. You don't have to use CHDK shell itself, just launch a shell from it or put the toolchains on your path.

For digic 6 cams, you need to to use the EABI compiler, form the gcc464-493 directory if you are using chdkshell tools.
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Offline oli__

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Re: SX280 / 275 / 270 porting
« Reply #237 on: 27 / November / 2015, 12:28:44 »
Hey Guys,

I am new here :)

 I recently buyed a sx280hs. I downloaded the zip files in order to run the chdk on my camera.
But i am missing the "ps.fi2" file !
Where can i found it? It isnt in the zip. (althought "diskboot.bin" is included in the zip)

Thank you for your replys :)
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Offline oli__

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Re: SX280 / 275 / 270 porting
« Reply #238 on: 27 / November / 2015, 13:25:26 »
I found, that i need a bootable sd card and i followed your instructions. But CHDK still doesnt load
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Offline waterwingz

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Re: SX280 / 275 / 270 porting
« Reply #239 on: 27 / November / 2015, 13:47:19 »
Quote from: oli__ on 27 / November / 2015, 13:25:26
I found, that i need a bootable sd card and i followed your instructions. But CHDK still doesnt load
It seems likely that you may not really have followed the instructions exactly. CHDK does load and run if everything is setup correctly.  We will need a lot more information about what you did if we are to help you.

So in your own words,  please describe exactly what you did step-by-step?  How did you setup your SD card to be bootable?  How did you load CHDK onto the card?  What happens when you put the card into your camera and turn on the power?  What do you see on camera's LCD display?
« Last Edit: 27 / November / 2015, 14:28:00 by waterwingz »
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