January 2014
Intermediate to advanced
474 pages
13h 28m
English
Content preview from AVR ProgrammingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 19. EEPROM
In Chapter 16 we used external EEPROM (electrically erasable and programmable ROM) for nonvolatile external data storage. For making a data logger it was just right: EEPROM provides low-power, long-term storage of fairly large amounts of data. But if all you want is a little bit of data to survive a chip reset, adding an extra chip and tying up the SPI or I2C lines just for a few bytes of configuration data seems overkill. That’s why the Atmel chip designers put a small amount of EEPROM on each of the ATmega chips for you to use.
In this chapter, we’ll turn the AVR into a Vigenère Cipher encoder and decoder, storing the encryption key strings in nonvolatile EEPROM memory so that you don’t have to remember ...
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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.