I have not been able to get CAN2_RX0_IRQ or CAN3_RX0_IRQ to fire. CAN1_RX0_IRQ works as expected. It appears that rather than the CAN IRQs firing, the WWDG interrupt is going off for CAN2_RX0 and the DMA1_Stream0 is going off for CAN3_RX0. Neither th...