First of all i'm surprised why there is no information about this on the net. It's kind of taboo i think.
You need:
-Raspberry Pi
-HDMI to VGA adapter:
-PiCAN or other MCP2515-based extension board for RPi. You can make one by yourself.
TJA1054 or similar (newer) CAN Transceiver is the best choice, because it can control DC-converter to shut down RPi and get lower quiescent current (single microAmps when sleeping).
You need to set specific resolution for HDMI:
root@pi:/boot# tvservice -s
state 0x12001a [HDMI CEA (21) RGB lim 4:3 x2], 720x576 @ 50.00Hz, interlaced
Important! You need to connect all negative pins of video signals together and then to the ground (at the 26 pin connector on RNS side):
4 – Video signal input, RGBS, negative (ground)
9 – Video signal input, RGBS, negative (ground)
11 – Video signal input, screening earth
24 – Video signal input, RGBS, negative (ground)
The code is available at github:
https://github.com/majonezz/rns510-tv-input
