ATSAMA5D27-SOM1-EK1 - Booting a Linux® Image

Booting a Linux® Image

This topic lists step-by-step instructions for booting a Linux image to the ATSAMA5D27-SOM1-EK1. As an example (and demo), you will download and flash a demonstration image from the Linux4SAM website.

What you will need:

  • ATSAMA5D27-SOM1-EK1
  • Micro-B USB cable (included in the ATSAMA5D27-SOM1-EK1 box)
  • Personal computer (Windows, MacOS, Linux) running a terminal program
  • SD Memory Card (1 GB or larger)

Summary of Steps:

  1. Familiarize yourself with the Features of the ATSAMA5D27-SOM1-EK1
  2. Download demonstration image
  3. Flash demo image to SD Memory Card
  4. Download, install, and configure a Terminal program onto your personal computer.
  5. Ensure the jumpers are in the correct position
  6. Connect your PC to J10 using a Micro-B USB cable
  7. Press RESET button PB1

Steps:

1

Familiarize yourself with the Features of the ATSAMA5D27-SOM1-EK1

Take a moment and familiarize yourself with the Features of the ATSAMA5D27-SOM1-EK1 development platform.

2

Download demonstration image

The latest demonstration images for the ATSAMA5D27-SOM1-EK1 are available on the Linux4SAM.org website:

https://www.at91.com/linux4sam/bin/view/Linux4SAM/Sama5d27Som1EKMainPage#Demo

There you will find three sets of images created from one of three Build Systems:

​

If this is your first time downloading an image, and you are not sure which one to download, try the Buildroot based demo without display: linux4sam-buildroot-sama5d27_som1_ek-X.Y.img.bz2 where X.Y is the version number.

demo_images_snip.png

3

Flash and insert SD Memory Card

a

Flash demo image to SD Memory Card

The easiest method to flash an image to a SD Memory Card is to use the utility program Etcher. It is available for Windows, MacOS, or Linux.

First, locate and select the image:

Etcher_Select_Image.png

Second, locate and select the SD Memory Card:

Etcher_Select_Drive.png

Third, select flash. This will take a few minutes.

Etcher_Flash.png

b

Insert SD Memory Card into J12

Once the image has been successfully flashed to the SD Memory Card, insert it into J12:

insert_SD_card.png

4

Download, install, and configure a Terminal program onto your personal computer

There are several choices for terminal programs. Below is a list of popular programs. Many are free to download and a few are included with the operating system or distributions.

Windows

macOS

  • Screen
    • Find the serial port: $ ls /dev/tty.*
    • To run: $ screen /dev/tty.usbmodemFD121 115200
    • To quit: $ Control-a $ Control-\
  • minicom
  • CoolTerm
  • Serial
    • Available from the Apple App Store

Linux

5

Ensure the jumpers are in the correct position

ATSAMA5D27_SOM1_EK1_jumpers.png

6

Connect your PC to J10 using a Micro-B USB cable. This will also power the development board

insert_usb_j10.png

7

Press the Reset button PB1

press_reset_pb1.png

The boot sequence will display in the terminal window. At the end the command line will prompt the user to log in.

linux_boot_indications.png

Proper operation of the image and the on-board J-Link Debugger will be indicated by:

  • LED D5 - Flashing Blue indicates operation of the Linux operating system image
  • LED D4 - Flashing Green indicates operation of the J-Link Debugger

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