Beginning project to use beCAn on a stm8s208, mere presence of either CAN interrupt vector interferes with TIM4_UPD_OVF_IRQHandler.

[GOgle]

No attempt yet to initialize can, just adding entry into interrupt vector table table for either can rx or can tx impacts TIM4_UPD_OVF_IRQHandler. TIM4 will run twice, then never run again.

Can interrupts are not enabled yet, can interrupt vector never occurs.