USB, PTP...

Started by dorkbydesign, September 29, 2012, 07:36:57 AM

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dorkbydesign

Hmm... Do you think we could send raw serial data over USB? If we could, we'd be able to just push the image buffer over it and get 4:2:2 colour which would be bangin'.

nanomad

You can implement a custom PTP message and do pretty much whatever you want, including sending a raw video frame.
EOS 1100D | EOS 650 (No, I didn't forget the D) | Ye Olde Canon EF Lenses ('87): 50 f/1.8 - 28 f/2.8 - 70-210 f/4 | EF-S 18-55 f/3.5-5.6 | Metz 36 AF-5

ilguercio

So that means data can only be sent OUT of the camera, right?
What about feeding something to the camera?
Or, what can you do with the HDMI port?
Canon EOS 6D, 60D, 50D.
Sigma 70-200 EX OS HSM, Sigma 70-200 Apo EX HSM, Samyang 14 2.8, Samyang 35 1.4, Samyang 85 1.4.
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nanomad

The ptp protocol is bidirectional but from the USB point of view the camera is the device while the computer is the host.
I've never looked at the HDMI port bug i think it is handled by a separate chip
EOS 1100D | EOS 650 (No, I didn't forget the D) | Ye Olde Canon EF Lenses ('87): 50 f/1.8 - 28 f/2.8 - 70-210 f/4 | EF-S 18-55 f/3.5-5.6 | Metz 36 AF-5