STM32 WWDG interrupt firing when not configured

Question

I have an application that I am porting from the Keil IDE to build with the GNU toolchain due to license issues. I have successfully be able to set up, build, flash and run the

Answer 1

I've had this problem due to the same root cause as awilhite. I'm using Atollic TrueStudio 8.0.0. I used it to start a project for STM32F030 and (probably manually) added libraries folder with stm32f0xx.h, which defines ADC1_IRQn (IRQ channel number used in NVIC setup).

And I implemented ADC1_IRQHandler(void) in my main.c (as I'm used to and it always worked so far -- x_IRQn -> x_IRQHandler)

But after 2 days frustration, I found out, that startup_stm32f0xx.s in my project defines ADC1_COMP_IRQHandler.

So, ultimately, my ADC interrupt handler was undefined and when the ADC generated the interrupt, the program crashed (WWDG interrupt).

I hope this helps to people like me, who think they did implement their handler but in fact, they did not.