medium10 pts · first answer countsconcurrencyinterrupts

Counter shared with an ISR

On a 32-bit MCU, main does counter++ on a volatile uint32_t that a timer ISR also increments. Why can counts be lost?

A.volatile variables cannot be incrementedB.counter++ is a read-modify-write; if the ISR runs between the read and the write, its update is overwrittenC.The ISR always runs on a different CPU coreD.uint32_t overflows after 255

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Counter shared with an ISR

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