Cranking with reasonable compression waves does not stay synced

[ggurov]

Describe the bug
With addition of reasonable compression waves, trigger decoder appears to lose sync after 4 revolutions

Hardware

• Board: stm32_mega
• Engine info: bench-ardustim with compression waves 36-2 + 1 tooth cam

To Reproduce
Steps to reproduce the behavior:

1. Set up ardustim to 150 rpm min with compression waves enabled
2. start stim
3. observe 4 revolutions and syncloss with no attempt to resync - sync errors now going up

Expected behavior
ECU to start synced with the trigger wheel

Screenshots

Additional context
see .zip file for SALEA logic analyzer capture, crank/cam are 1st and 2nd channel
tune and log are included.

rusefi_compression_wave_trigger.zip

[ggurov]

proposed solution: experimental dev bit (maybe not even ?) for more relaxed synchronization timings below cranking RPM

it is possible someone's battery that's low enough could cause a no-start in this case.