IoT & Hardware
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You're reading from  BeagleBone for Secret Agents

Product typeBook
Published inSep 2014
PublisherPackt
ISBN-139781783986040
Edition1st Edition
Tools
BeagleBone
Concepts
Embedded Systems
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Author (1)
Joshua Datko
Joshua Datko
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Joshua Datko

Josh Datko is the founder of Cryptotronix, LLC, an open source hardware company that specializes in embedded, cryptographic electronics. He graduated with distinction from the US Naval Academy with a Bachelor's of Science in Computer Science and then served 10 years in the Navy, both actively and as a reserve submarine officer. He has been deployed to locations worldwide including Afghanistan in support of Operation Enduring Freedom. In 2014, Josh presented at both the HOPE and DEF CON conferences. He completed his Master's of Science in Computer Science, with a focus on security and networking, from Drexel University.
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Understanding the benefit of cape EEPROMs

At a glance, the CAT24C256 Electrically Erasable Programmable Read Only Memory (EEPROM) doesn't appear to add much value to the board. After all, the BeagleBone has a 2GB eMMC on the early revisions and a 4GB eMMC on revision C. An extra 256 kB of memory is hardly food scraps for the beagle. However, it serves a greater purpose; it's what enables automatic cape detection by the BBB.

The BBB has two 46 pin female expansion ports offering much more I/O capabilities than any other hobbyist board on the market. Certain pins can actually support eight different modes, mode 0 through mode 7. The mapping of pin features to a mode is known as pin muxing, short for pin multiplexing. To use a pin in a certain mode, the software must enable and configure this pin through the kernel's interface. This can be manually performed or scripted, but the easiest method is to use a BeagleBone cape.

During the kernel startup, the software will probe the I2C bus looking...

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BeagleBone for Secret Agents
Published in: Sep 2014Publisher: PacktISBN-13: 9781783986040
© 2014 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Joshua Datko

Josh Datko is the founder of Cryptotronix, LLC, an open source hardware company that specializes in embedded, cryptographic electronics. He graduated with distinction from the US Naval Academy with a Bachelor's of Science in Computer Science and then served 10 years in the Navy, both actively and as a reserve submarine officer. He has been deployed to locations worldwide including Afghanistan in support of Operation Enduring Freedom. In 2014, Josh presented at both the HOPE and DEF CON conferences. He completed his Master's of Science in Computer Science, with a focus on security and networking, from Drexel University.
Read more about Joshua Datko

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