There is a dedicated boiler in hell for those who makes i2c and MIPI DSI/CSI2 wires/traces longer than 50cm.bullen wrote: ↑Sun Aug 02, 2020 11:44 pmNope, I mean a round cable for the camera.
Like this but not using HDMI:
https://www.geeky-gadgets.com/raspberry ... 8-05-2015/
No plans from us I am afraid.
While only 15cm long cables are officially supported, I use 1m and 2m CSI-2 flex cables routinely without issues for years.
Good catch with DDC
No offence taken. i2c is mostly aimed at short distance communication within a system. HDMI (and VGA) are exceptions to this.
For re-purposed cable, USB C seems the best option to me due to small connector and more flex cable, compared to regular HDMI. SSTX and SSRX gives 4 high speed differential lines, D+/D- for i2c and use CC1/2 to detect orientation and control switch for SSTX/RX if upside downplugwash wrote: ↑Mon Aug 03, 2020 11:55 amFancy custom cables in low-volume are expensive. It's much easier to re-purpose an off the shelf cable than to get something custom made.
The pi camera interface has three LVDS pairs, (clock and two data lanes) plus power, ground I2C and two dedicated control lines.
So what cable do we re-purpose?
SATA is out, it only has two differential pairs.
USB3 is out, it has three differential pairs but nowhere to put the I2C and other control lines.
HDMI works, it has four differential pairs and a bunch of other lines.
Seems to me you answered that one.
I tried that, but had the feeling the cable woul break. For sure you will not be able to get down to 0.1" diameter possible with spiral. I think OP wants cable for small size(diameter). Reduced size can be easily compensated by using 1m or 2m flex cables for spiral cable (officially supported are only 15cm, but they work fine for me since years).