September 2016
Intermediate to advanced
495 pages
9h 37m
English
book
Arduino: Building exciting LED based projects and espionage devices
by Adith Jagdish Boloor, Samarth Shah, Utsav Shah, Marco Schwartz
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Programming an LED array
An LED array is nothing but a few LEDs connected together. Usually, an LED array comes in sizes of eight LEDs and 16 LEDs. You can control an LED array directly using the digitalWrite() function. Apart from using the digitalWrite() function, you can control LEDs directly using port-level communication. On Arduino, we have three ports: ports B, C, and D:
- Port B: Digital pins 8 to 13
- Port C: Analog pins
- Port D: Digital pins 0 to 7
Each port is controlled by three DDR registers. These registers are defined variables in Arduino as DDRB, DDRC, and DDRD. Using these variables, we can make the pins either as input or output in the setup function.
You can use the following syntax to initialize the pins:
DDRy = Bxxxxxxxx
Here, y is the ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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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