easy5 pts · first answer countsmicrocontrollersinterruptscortex-m

Hooking an ISR in CMSIS startup code

In a CMSIS-style startup file, USART1_IRQHandler is declared as a weak alias of Default_Handler. How do you supply your own handler?

A.Define void USART1_IRQHandler(void) in your own codeB.Patch the vector table bytes by hand in the flash imageC.Call NVIC_SetHandler with the function at the start of mainD.Rename Default_Handler to USART1_IRQHandler in startup

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Hooking an ISR in CMSIS startup code

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