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GNU/Linux Rapid Embedded Programming

You're reading from   GNU/Linux Rapid Embedded Programming Your one-stop solution to embedded programming on GNU/Linux

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Product type Paperback
Published in Mar 2017
Publisher Packt
ISBN-13 9781786461803
Length 732 pages
Edition 1st Edition
Languages
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Author (1):
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Rodolfo Giometti Rodolfo Giometti
Author Profile Icon Rodolfo Giometti
Rodolfo Giometti
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Table of Contents (20) Chapters Close

Preface 1. Installing the Developing System FREE CHAPTER 2. Managing the System Console 3. C Compiler, Device Drivers, and Useful Developing Techniques 4. Quick Programming with Scripts and System Daemons 5. Setting Up an Embedded OS 6. General Purposes Input Output signals – GPIO 7. Serial Ports and TTY Devices - TTY 8. Universal Serial Bus - USB 9. Inter-Integrated Circuits - I2C 10. Serial Peripheral Interface - SPI 11. 1-Wire - W1 12. Ethernet Network Device - ETH 13. Wireless Network Device - WLAN 14. Controller Area Network - CAN 15. Sound Devices - SND 16. Video devices - V4L 17. Analog-to-Digital Converters - ADC 18. Pulse-Width Modulation - PWM 19. Miscellaneous Devices

Getting access to I2C devices


Now we are ready to manage real I2C devices. We can find tons of supported devices into the Linux kernel tree whose are usually grouped according to their specific operations so, for instance, all I2C real-time clock chips are under the directory drivers/rtc/ while I2C EEPROMs are under directory drivers/misc/eeprom/, and so on of the Linux's source repository.

In the next section we're going to see several different kinds of devices all connected to the main CPU through the I2C bus, also we're going to use different embedded kits to test them, but as said before, every commands can be easily repeated on every GNU/Linux based boards with a similar configuration.

EEPROM, ADC and IO Expander

As first example we're going to use the following development board carrying five I2C devices:

Note

The device can be purchased at the following link (or by surfing the Internet): http://www.cosino.io/product/i2c-sensors-board

On this board we have an EEPROM, an ADC, a DAC...

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