May 2018
Intermediate to advanced
324 pages
8h 45m
English
Content preview from Embedded Systems Architecture
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Interrupt-based input
Having to proactively read the value of the pin by constantly polling the IDR is not convenient in many cases, where the application is supposed to react to state changes. Microcontrollers usually provide mechanisms to connect digital input pins to interrupt lines, so that the application can react in real time to events related to the input because the execution is interrupted to execute the associated service routine.
On the reference MCU, the pin A0 can be connected to the external interrupt and event controller, also known as EXTI. EXTI offers a number of edge-detection triggers that can be attached to interrupt lines. The number of the pin within the GPIO group determines the number of the EXTI interrupt that is ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.