Create a SD card with the demo

You need a 1 GB SD card (or more) and to download the image of the demo. The image is compressed to reduce the amount of data to download. This image contains:

• a FAT32 partition with the AT91Bootstrap, U-Boot and the Linux Kernel (zImage and dtb).
• an EXT4 partition for the rootfs.

Multi-platform procedure

To write the compressed image on the SD card, you will have to download and install balenaEtcher. This tool, which is an Open Source software, is useful since it allows to get a compressed image as input. More information and extra help available on the balenaEtcher website.

• Insert your SD card and launch Etcher:

1. Select the demo image. They are marked as "SD Card image" in the demo table above.
   Note that you can select a compressed image (like the demos available here). The tool is able to decompress files on the fly
2. Select the device corresponding to your SD card (Etcher proposes you the devices that are removable to avoid erasing your system disk)
3. Click on the Flash! button
4. On Linux, Etcher finally asks you to enter your root password because it needs access to the hardware (your SD card reader or USB to SD card converter)
5. then the flashing process begins followed by a verification phase (optional)

• Once writing done, Etcher asks you if you want to burn another demo image:

• Your SD card is ready!

Note: The SD card should be inserted into the micro SD connector J3.

Alternative Linux procedure (Use at your own risk!)

• Uncompress the image:

bunzip2 linux4sam-poky-sama5d2_xplained-5.0.img.bz2

The compressed image will be removed and you will get the uncompressed image named linux4sam-poky-sama5d2_xplained-5.0.img.

• Insert your SD card. To identify the device, use the dmesg command.

If you have an integrated SD card reader, you should have something like this:

[74402.090920] mmc0: new high speed SDXC card at address 0007
[74402.091329] mmcblk0: mmc0:0007 SD64G 58.1 GiB
[74402.092653]  mmcblk0: p1 p2

The device is mmcblk0.

If you have a usb adapter, you should have something like this:

[74450.341001] usb 2-1.2: new high-speed USB device number 7 using ehci-pci
[74450.434871] usb 2-1.2: New USB device found, idVendor=058f, idProduct=6366
[74450.434877] usb 2-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[74450.434880] usb 2-1.2: Product: Mass Storage Device
[74450.434883] usb 2-1.2: Manufacturer: Generic
[74450.434885] usb 2-1.2: SerialNumber: 058F63666433
[74450.435551] usb-storage 2-1.2:1.0: USB Mass Storage device detected
[74450.435765] scsi host10: usb-storage 2-1.2:1.0
[74451.567171] scsi 10:0:0:0: Direct-Access     Multiple Card  Reader     1.00 PQ: 0 ANSI: 0
[74451.568032] sd 10:0:0:0: Attached scsi generic sg3 type 0
[74452.338367] sd 10:0:0:0: [sdc] 121864192 512-byte logical blocks: (62.3 GB/58.1 GiB)

The device is sdc.

• Once you have identified the your SD device you can write the image on it with the dd command.

Warning: Be careful to not make any mistake about the device. You can lost your data if you write the image to your hard drive(s) which are usually /dev/sda or /dev/sdb.

sudo dd if=linux4sam-poky-sama5d2_xplained-5.0.img of=/dev/mmcblk0

• Your SD card is ready!