Collection of tools for dumping the memory or backing up the flash chip using the memory read native
command present in bootloaders of some devices (not all) like routers.

Usually you access to the bootloader command line using an UART adapter, and then if the command is
available dump small portions of the memory in plain text, this tools automate the process for getting
a full backup in binary format. It deals through the serial port with the bootloader sending the command
memory read and captures the output dumping it into a binary file.

This tool can, so far, given a serial port connected to a device with brnboot / amazonboot, dump its flash into a file.
Homepage: https://github.com/rvalles/brntool

Example:
python3 brntool.py --read=AR4518PW_whole.dump --addr=0xB0000000 --verbose --size=0x400000

--addr: Memory Address
--size: Memory Size
--block: Buffer size (Default: 10240 -> 10Kb)

This tool can dump the flash of a device with CFE bootloader into a file.
It's compatible with all CFE bootloaders with "dm" command usually found in BCM63xx SoCs.

Example:
python2 cfetool.py --read=test.bin --addr=0xB8000000 --size=0x20000 --block=0x10000

--addr: Memory Address
--size: Memory Size
--block: Buffer size (Default: 10240 -> 10Kb)

Zyxel variants:
zyx1tool.py, zyx2tool.py

This tool can dump the NAND flash of a device with CFE bootloader into a file.
It's compatible with all CFE bootloaders with "dn" command usually found in BCM63xx SoCs.
Homepage: https://github.com/Depau/bcm-cfedump

Example:
python -m cfenand -D /dev/ttyUSB0 -O nand.bin -t 0.05 nand

Tested with a BCM63167 Sercomm router (128MB flash).

For Ralink RT63365 (Trendchip) based SoCs running the tcboot bootloader. Tested on Huawei HG532s

Example:
python2 rt63365tool.py --read=test.bin --addr=0xB0000000 --size=0x800000 --block=0x10000

--addr: Memory Address
--size: Memory Size
--block: Buffer size

This tool can dump the flash memory of a Realtek RTL8186 based device running the btcode bootloader

Example:
python2 rtl8186tool.py --read=test.bin --addr=0xbfc00000 --size=0x200000 --block=0x10000

--addr: Memory Address
--size: Memory Size
--block: Buffer size (Default: 10240 -> 10Kb)

Note: the default baud rate used by the tool is 38400 bps

This tool was tested on a Realtek RTL8676 based device (ZTE H298N)

Example:
python2 rtl867xtool.py --read=test.bin --addr=0x80000000 --size=0x8000000 --block=0x10000

--addr: Memory Address
--size: Memory Size
--block: Buffer size (Default: 10240 -> 10Kb)

All tools are based/inspired on the original brntool (@rvalles): Homepage: https://github.com/rvalles/brntool