jiangqucheng / meta-ebaz4205

meta-layer for EBAZ4205

meta-ebaz4205

The EBAZ4205 was originally developed as cryptomining control board. Due to it's low price on the marked it is also perfect to learn the Zynq platform. This meta-layer provides everything to build a linux system with basic BSP (Board Support Package).

Maintainer

Lukas Lichtl ([email protected])

Hardware Support

There seem to be two hardware versions currently sold, one with a PHY oscillator mounted and one where it is missing. This layer current supports both versions.

Dependencies

This layer depends on:

URI: git://git.yoctoproject.org/poky
branch: zeus

URI: https://github.com/Xilinx/meta-xilinx.git
branch: zeus

URI: https://github.com/Xilinx/meta-xilinx-tools.git
branch: rel-v2020.1

URI: https://github.com/openembedded/meta-openembedded.git
branch: zeus

Integration

1. Add the meta-ebaz4205 layer to your build
2. Copy meta-ebaz4205/conf/.templateconf to the poky root dir
3. Source the environment and build

Images

The following images are predefined:

• ebaz4205-image-minimal
• ebaz4205-image-standard
• ebaz4205-image-standard-wic

Installation

The simpest way to install and test the output products of your build is the WIC image. Copy it on an SD-Card and you should be good to go:

dd if=ebaz4205-image-standard-ebaz4205-zynq7.wic of=/dev/<dev> bs=4096

BSP Details

FSBL(First Stage Bootloader)

Configures the Bitstream

U-Boot(Second Stage Bootloader)

Tailored for SD-Boot, since this is how the board is mainly used. Wait time during boot is set to zero. In order to interrupt the boot process, press and hold Button S2 during boot and you will end up in the u-boot console.

In order to identify boot issues, the following LED codes are.

LED red	LED green	Boot State	Description
on	on	0	init/pwr up
on	off	1	Bitstream config done
off	on	2	DDR load done
off	off	3	-

Linux

Credentials

The systems default credentials are root / root.

Ethernet

The phy on the board supports 10/100Mbit and the image provides an ssh-server. This allows you to connect to the board without the use of the serial console.

LEDs

In order to identify that linux was booted as intended and the system is running, the green LED provides a heartbeat.

LED red	LED green	Boot State	Description
off	heartbeat	0	init done

Mount Points

The boot partition is mounted on /media/mmcplk0p1. This allows access to the boot files while the system is running (eg. to modify uEnv.txt or provide updates).

Buttons

Button presses can be detected in user-space using /dev/input/event0.

LEDs

Both LEDs on the front (green, red) are accessable from within user space /sys/class/leds.