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RZBoard Flash Utility

This is a platform agnostic utility used to flash the RZBoard. It can be used to flash the eMMC with, both, the bootloaders and system image.

Install Python

This utility is written in python3 with dependencies managed using pip.

Ubuntu Installation

If runnng Ubuntu, these can be installed by running the following:

sudo apt install -y python3 python3-pip

Other OS

Mac and Windows can install by using one of the manage package managers for your platform or by downloading an installer from https://www.python.org/downloads/.

Dependencies

The script has a couple dependencies. These can be installed by running the following:

git clone https://github.com/erstoddard/rzboard_flash_util.git
cd rzboard_flash_util
pip3 install -r requirements.txt

Usage

Running ./flash_util.py -h will print usage information. A more detailed description of the arguments is detailed below.

Specifying What to Flash

The utility can be used to flash the bootloader, rootfs, or both at the same time:

./flash_util.py --bootloader # Flash bootloader only
./flash_util.py --rootfs     # Flash system image only
./flash_util.py --full       # Flash bootloader and system image

Options

Serial Port

By default, the utility uses /dev/ttyUSB0 as the serial port to communicate with the RZBoard. This can be changed with --serial_port. Additionally the default baud rate of 115200 can be chaged with --serial_port_baud:

./flash_util --serial_port DESIRED_SERIAL_PORT --serial_port_baud DESIRED_BAUD_RATE

Image Locations

By default, the utility looks for the required images in the directory that flash_util.py is located. The required images, along with the override flag and default location and name is listed below:

Image Flag Default Description
Flash Image Writer --image_writer <SCRIPT_DIR>/Flash_Writer_SCIF_rzboard.mot Application loaded in to received bootloader images over serial and write to eMMC
BL2 Image --image_bl2 <SCRIPT_DIR>/bl2_bp-rzboard.srec Bootloader
FIP Image --image_fip <SCRIPT_DIR>/fip-rzboard.srec Bootloader, ARM TFA (Trusted Firmware-A) BL31, and u-boot in a combined image
System Image --image_rootfs <SCRIPT_DIR>/avnet-core-image-rzboard.wic Contains the linux kernel, device tree (dtb), and to root filesystem (rootfs) in a minimized format.

NOTE: If only flashing the system image, the image writer, bl2, and FIP images are not required/