Look into the device header in [CubeF3]\Drivers\CMSIS\Device\ST\STM32F3xx\Include\, you already have a symbol defined there such as
TIM7_IRQn = 55, /*!< TIM7 global Interrupt */
which you use to enable the interrupt and set its priority using the following CMSIS convenience functions:
NVIC_SetPriority(TIM7_IRQn, 3);
NVIC_EnableIRQ(TIM7_IRQn);
Then in the startup code you'll find a table pointing to the interrupt service routines, named similarly:
.word TIM7_IRQHandler
so you write a function with the SAME name
void TIM7_IRQHandler(void) {
// read out TIM_SR, clear it as soon as possible, and handle whatever interrupts have been indicated of the enabled ones
}
and that's your interrupt service routine (ISR) for this interrupt.
EXTI is just one of the interrupt sources - look at the table of exception vectors you've mentioned, you'll find how outputs from EXTI go into NVIC (some of them alone, some of them grouped).
I know of no good concise tutorial in this, most of the information is scattered in the basic documentation - the Programming Manual for Cortex-M4, which mostly copies portions of the ARM's Cortex-M4 Technical Reference Manual, and the same is then extended with some narrative in Joseph Yiu's books.
JW
