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STM32 unimplemented interrupts

Question asked by gaspar.laszlo on Feb 20, 2018
Latest reply on Feb 21, 2018 by dhenry

All of the STM32 devices have unimplemented interrupt numbers, for example on the STM32F767 I am currently using, the last used interrupt MDIOS_IRQn is interrupt number 109.

 

So is it possible to use the next one, number 110, as a user software interrupt? Obviously there is no peripheral device connected to this interrupt line so there is no danger of a spurious interrupt request, but what's stopping us from defining our own interrupt as

 

MYOWN_IRQn = 110

 

And then enabling it and disabling it with NVIC_EnableIRQ(), adding another entry to the interrupt vector table in startup_stm32f767xx.s and using it as a user-defined software interrupt?

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