hard20 pts · first answer countsfirmwareuartinterrupts

Critical section loses bytes

Interrupts are disabled for 2 ms while a flash sector is written. A UART with a 1-byte receive buffer runs at 115200 baud, 8N1. About how many bytes can arrive in that time?

A.About 2, so the buffer just about copesB.About 23, so all but one or two are lostC.About 230, so the link must be slowed 100×D.None; UART data waits until interrupts return

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Critical section loses bytes

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