sc2-lighting

Lighting controller firmware for STM32F042 boards. Set #define BOARD in include/lightingCAN.h (1–7) before building.

Board map

BOARD	Role	LED 0 (PA0)	LED 1 (PA1)	CAN source
1	Left front	Left blink	Headlight	0x300 bit 1 / bit 0
2	Right front	Right blink	Headlight	0x300 bit 2 / bit 0
3	Left side	Left blink	BPS fault (local blink)	0x300 bit 1 / 0x100
4	Right side	Right blink	Brake	0x300 bit 2 / 0x207 bit 5
5	Left rear	Left blink	Brake	0x300 bit 1 / 0x207 bit 5
6	Right rear plate	Right blink	Plate (always on)	0x300 bit 2 / GPIO
7	Rear reverse	Reverse	Brake	0x207 bit 0 / bit 5

Blink sync

Turn-signal blink timing comes from the steering wheel (or can-bounce bench emulator) via pre-phased bits on CAN 0x300. Lighting boards mirror those bits directly — no local toggle.

Bench testing with can-bounce

1. Flash can-bounce to the F767 Nucleo and sc2-lighting with the matching BOARD value set in lightingCAN.h.
2. Wire CAN H/L at 250 kbps.
3. Serial monitor on can-bounce @ 115200:

Key	Signal
1	Left blink
2	Right blink
3	Headlight
4	Brake
5	BPS fault
6	Hazards (overrides 1/2, both sides blink together)
7	Reverse (0x207 direction bit)

Hazard test cases

1. Press 1 — left-side blink boards flash, right-side off.
2. Press 6 — both left and right blink boards flash in sync.
3. Press 1 or 2 while hazards on — no change.
4. Press 6 again — all blinkers off.
5. Press 2 — right-side boards flash only.
6. Press 6 while right blink active — both sides flash; right blink latch cleared.