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Beaglebone Essentials

You're reading from   Beaglebone Essentials Harness the power of the BeagleBone Black to manage external environments using C, Bash, and Python/PHP programming

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Product type Paperback
Published in May 2015
Publisher
ISBN-13 9781784393526
Length 240 pages
Edition 1st Edition
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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 (13) Chapters Close

Preface 1. Installing the Developing System 2. Managing the System Console FREE CHAPTER 3. Compiling versus Cross-compiling 4. Quick Programming with Scripts 5. Device Drivers 6. Serial Ports and TTY Devices 7. Universal Serial Bus – USB 8. Inter-integrated Circuit – I2C 9. Serial Peripheral Interface – SPI 10. 1-Wire Bus – W1 11. Useful System Daemons Index

Getting access to the serial console

As shown in Chapter 1, Installing the Developing System, during our first login, we can easily get access to the system through a USB connection; however, doing it this way we use a virtual serial line created by the kernel that is not available during the first boot stages (that is, when the bootloader runs).

However, to have more control of the board (that is, complete booting stage control, kernel debugging messages, and so on), we must get access to the serial console, which is a real device, and it can be accessed using a serial adapter connected to connector J1, as shown in the following image:

Getting access to the serial console

There are two different kinds of serial adapters on the market. The first one is a standard FTDI USB to TTL cable, as shown in the following image:

Getting access to the serial console

While the second one is a standard TTL to RS232 converter, as shown in the following image:

Getting access to the serial console

Note

The TTL to RS232 converter can be purchased (or by surfing the Internet) at

http://www.cosino.io/product/rs-232-serial...

You have been reading a chapter from
Beaglebone Essentials
Published in: May 2015
Publisher:
ISBN-13: 9781784393526
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