I have one external interrupt working fine, but I need to add a few more and I'm failing to understand how it all maps out.
The one I have implemented is on PA3 and the ISR is void EXTI3_IRQHandler(void).
Although the UM says that almost all pins on all ports can be used as EXTIs, there are only 5 EXTI IRQs. There does not seem to be an explicit way to map a pin to an ISR,
so is it the case that only pins 0..4 on a port can be used for EXTI?
If not, I would be grateful if someone could illustrate how to do so.
(Using STM32F4Discovery/Keil with peripheral library 1.1.0)