I may get to use the R-Pi CSI camera in a project at work. Due to size requirements I need the camera separate from the RPi itself. One question mark right now is the flat ribbon cable; it would be better to have a more manageable round cable.
Looking at the schematics
I see the S5 connector on the Rpi going to the camera carries 3 high-speed differential pairs separated by ground lines, plus four low-speed signals (note: "CAM_CLK" is actually DC; the indicator LED), plus 3V3 power taking up 15 conductors in total.
Compare that to an HDMI connector with 19 pins, including 4 high-speed shielded differential pairs. You can get HDMI cables with 30-AWG wiring that are not too thick, and not too expensive
(or even 3.5mm cable, for a crazy price
). You can probably see where I'm going with this. You could put the camera signals through HDMI wiring with 4 conductors left over, for any other signal needs.
So I am considering making a set of R-Pi CSI connector flex to HDMI cable adaptor boards. If it works with 4 meters of plain ribbon cable
, I suppose it works with HDMI cable qualified to 3.4 Gbps per channel.
My question: this seems reasonable enough that someone may have already done it? Or knows some reason why it wouldn't work? (apart from maybe some legal or trademark issue if the HDMI association hears about it).