after stating my BP3 program without power switch on (by mistake) I now get repeatedly SPI setup error even when starting the info.c program, and also all others, even after shut down, switch off everything, reboot anew, repeatedly.
update: I found the reason about it:
Due to this failure the SPI port had been disabled on my Pi surreptitiously, unexpectedly, magically.
@Dexter: can you please fix this, that the BP3 simply avoids either motor control if there is no external voltage applied, and then issues a notification on the console that the battery has to be plugged and switched on?