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You're reading from  Learning BeagleBone

Product typeBook
Published inDec 2014
Publisher
ISBN-139781783982905
Edition1st Edition
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Author (1)
Hunyue Yau
Hunyue Yau
author image
Hunyue Yau

Hunyue Yau is an electrical engineer who graduated from the California Institute of Technology. He has worked with Linux since the early '90s, starting with the Soft Landing System. He created one of the first embedded Linux devices in 1996 with a custom-made distribution. He has worked on various products such as embedded Linux appliances, embedded BSD-based devices, and embedded Linux mobile devices. As an active member of the BeagleBoard community, he has volunteered at numerous community events, from Maker Faire to Google Summer of Code mentoring. Today, Hunyue synergizes his electrical engineering skills with embedded Linux software skills to provide turnkey embedded Linux consulting services through HY Research LLC (http://www.hy-research.com/), a company founded by him.
Read more about Hunyue Yau

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The I2C bus


A common way to connect the peripherals that do not require a very high communication speed to an embedded system is using a protocol known as I2C.

Note

Inter-Integrated Circuit (I2C) is a protocol originally developed by Philips Semiconductors (now NXP). I2C is also known as IIC.

I2C is a simple serial protocol that uses two signal wires. In the simplest configuration used by many setups, there is one master and one or more slave devices. For the BeagleBone, the master will be the BeagleBone and the slave devices will be peripherals. Each slave device (we will shorten to just device) is uniquely identified by a 7-bit address.

Note

Later versions of the I2C protocol support an extended address that allows more devices on a single bus.

The serial bus, as originally defined, runs at 100 kHz; however, later revisions allowed 400 kHz and faster variations enabled all the devices on the bus to operate at the higher speed. So, a worst case speed figure is 100 kBits per second shared between...

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Learning BeagleBone
Published in: Dec 2014Publisher: ISBN-13: 9781783982905

Author (1)

author image
Hunyue Yau

Hunyue Yau is an electrical engineer who graduated from the California Institute of Technology. He has worked with Linux since the early '90s, starting with the Soft Landing System. He created one of the first embedded Linux devices in 1996 with a custom-made distribution. He has worked on various products such as embedded Linux appliances, embedded BSD-based devices, and embedded Linux mobile devices. As an active member of the BeagleBoard community, he has volunteered at numerous community events, from Maker Faire to Google Summer of Code mentoring. Today, Hunyue synergizes his electrical engineering skills with embedded Linux software skills to provide turnkey embedded Linux consulting services through HY Research LLC (http://www.hy-research.com/), a company founded by him.
Read more about Hunyue Yau