NVIC: Enable vector interrupt

Enable and trigger an interrupt vector manually. This is not the usually way to trigger an interrupt but is just here for illustration purpose

#include "bsp.h"

int main(void)
{
    HAL_Init();           /*Init HAL library*/
    
    /*Enable interrupt vector WWDG_IRQ where the CPU will jump if a watchdog event happens*/
    /*set to the lowest of the four priorities, third paramter indicates sub-priority but is not 
    in use for Cortex-M0 Mcu, it is here but compatibility reason on HAL libraries*/
    HAL_NVIC_SetPriority( WWDG_IRQn, 2, 0 );
    
    /*enable watchdog interrupt vector, the vector number defintions can be found at stm32g0b1xx.h*/
    HAL_NVIC_EnableIRQ( WWDG_IRQn );        
    
    while (1)
    {
        /*Manually trigger the WWDG_IRQ interrupt vector*/
        HAL_NVIC_SetPendingIRQ( WWDG_IRQn );
        
        HAL_Delay( 300 ); /*300ms Delay*/
    }
}

/*The program will jump here inmedialty after the function HAL_NVIC_SetPendingIRQ trigger the WWDG_IRQ interrupt. 
The interrupt service rutine is declared as it is in sthe tartup_stm32g0b1xx.s file*/
void WWDG_IRQHandler( void )
{
    /*we do something, it is not necesary to un-pending the interrupt since it does by hardware*/
}