I think I have made some progress, I have been trying to understand the dependencies and the fact that two external trigger modules makes thing a bit confusing.
1. trig_test.xml refers to files in the core subfolder, namely:
trigger_ext.c
trigger_ext.h
trigger_ext_hw.c
trigger_ext_hw.h <- defines the capture channel, and pinsel val and pinsel bit
2. trigger_ext.xml refers to files in the sensors subfolder:
trigger_ext.c
trigger_ext.h
trig_ext_hw.c
trig_ext_hw.h
It looks like I would need to add a define for the capture channel on the board file (umarime_lite_2.h for me) to replace PPM_CR.
Has anybody used either of theses modules?
Thanks,