FDCAN_ILS: RXFIFO0 does not produce Interrupt, but disables it instead

[Tobe]

I spent hours trying to figure out why my interrupt didnt work. I have to say that i didnt go with the HAL_FDCAN_ActivateNotification, so its a bit of my own fault.

Nevertheless would i would like to now, if this bit is of a use and if there is more to read about it. The RM does not really explain it, nor does the UM2570 do.