-can I specify the sdcard output to be in spi mode?
-can i put chdk onto the cameras memory so i can take the sd card out and wire the memory card port directly to my microcontroller
alternaively could i transfer an image using the flashing led technique? i found one post that quoted about a 10K transfer rate.
The Eye-Fi Card currently supports JPEG photo uploads. Non-JPEG content can be stored on the Eye-Fi Card like a standard SD memory card, but only JPEG photos will upload.
I don't know if anyone has tried an "Eye-Fi" card (2 GB SD card with WiFi interface):Eye-Fi » Home
That said, emulating an SD/MMC card or spying on one in parallel would need less knowledge of the camera. I doubt you'll be able to use the SPI interface unless the camera already uses the cards in that mode but that's just a guess (it's been a while since I've played with those, am I right if I remember that SD/MMC cards perform significantly slower in SPI compared to the MMC interface?)
believe you can. You should probably use a photodiode instead of a phototransistor for receiving as the latter may be too slow. AFAIK, there are watchdogs to worry during transmit but I'd think that just means that you need to pass control to the firmware every now and then. Of course, this way you only have output. Data input is limited to something like one bit per 10 ms or slower using the USB supply voltage method.
No I assume not, cause in that case the camera is the controller, and this means that you will almost certainly have to change the firmware.Nothing is impossible, but easier would be boring.
This brings up another question (sorry im in the research stage for this) can I boot the camera and then remove the sdcard and put in one which doesnt use CHDK? i didnt think you could but then i found something in the forum saying that to reset the card back to factory default you needed to take out the batteries.
Yeah I'm running through cameras at the moment from friends trying to see if any of them can transfer using spi mode or 1-bit mode. what I'm doing is using a sd card and covering the 8 and 9 pins with cellotape to see if the camera can still transfer an image to it.
Has anyone actually achieved this (a full photo transmission through the led) I cant find it on the site .
Using the "flashing LED" to transfer data while the camera is otherwise in operation is probably not worth the trouble... The data rates are low and error rates are high. Look for the dumping firmware forum and see that this can take hours to dump a couple MBytes of firmware.
Spectec Computer Co., Ltd. (don't know anything about the card or company)
My camera (and a lot of the others I would think) support MMC cards as well as SD cards. It actually came bundled with a small 16M or 32M MMC since there is no internal memory. MMC cards lack these extra pins (and all that SD DRM crypto [admin: avoid swearing please] with its license fees). SD cards are supposed to support MMC mode as well as SD mode. So aren't you testing for MMC mode instead of SPI or 1-bit mode? Or is MMC mode the same as 1-bit mode?
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General Discussion and Assistance
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General Help and Assistance on using CHDK stable releases
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