Hydrabus

HydraBUS - Pin Assignment

Features

Support many extensions:

• HydraNFC - Hydrabus shield for NFC

• HydraFlash - NAND flash shield

• HydraLINCAN - Hydrabus shield for LIN and CAN buses

External interactions:

• Bus interaction commands

• Trigger mode

• ADC guide

• DAC guide

• PWM guide

• GPIO guide

• SPI guide / binary mode

• I2C guide / binary mode

• 1-wire guide / binary mode

• 2-wire guide

• 3-wire guide

• UART guide / binary mode

• CAN guide / binary mode

• JTAG guide

• NAND Flash guide / binary mode

• Wiegand guide

• LIN guide

• SMARTCARD guide / binary mode

• NFC guide / binary mode

Firmware

• hydrabus/hydrafw - HydraFW official firmware for HydraBus/HydraNFC

• hydrabus/hydrafw_hydranfc_shield_v2 - HydraFW dedicated to HydraBus v1 / HydraNFC Shield v2

• bvernoux/blackmagic - In application debugger for ARM Cortex microcontrollers

Firmware Update

Detailed steps: hydrafw/Getting-Started-with-HydraBus-flash-and-use-hydrafw-on-linux

1. Install dfu-util

   git clone git://git.code.sf.net/p/dfu-util/dfu-util dfu-util
   cd dfu-util
   ./autogen.sh
   ./configure
   sudo make install

2. Download the latest release of the firmware

   wget https://github.com/hydrabus/hydrafw/releases/download/v0.11/build_HydraFW_v0.11-12-ga6019f4_HydraBus_HydraNFC.zip
   wget https://raw.githubusercontent.com/hydrabus/hydrafw/master/utils/udev-rules/09-hydrabus.rules -O ~/hydrafw/09-hydrabus.rules

3. Keep pressing UBTN button at PowerON/RESET in order to enter USB DFU

4. Connect the MicroUSB cable from your PC to HydraBus

5. Check Linux detection for HydraBus in DFU mode: sudo dfu-util -l

6. Flash the firmware: sudo dfu-util -i 0 -a 0 -d 0483:df11 -D ./build/hydrafw.dfu

Commands

• Basic info: show system

  HydraFW (HydraBus) v0.11-1-g4d74500 2023-05-09
  sysTime: 0x000d82dd.
  cyclecounter: 0x76ac02b9 cycles.
  cyclecounter64: 0x0000000076ac02cb cycles.
  10ms delay: 1680035 cycles.

• Determine the port name: ls -l /dev/tty*

• Interact witht the HydraBus: screen /dev/ttyACM0

• Switch to SPI mode: spi

• Determine the pin for SPI: show pins

Syntax

Value	Description
[	Chip select (CS) active (low)
]	CS disable (high)
r	Read one byte by sending dummy byte (0xff). r:1...255 for bulk reads
hd	Read one byte by sending dummy byte (0xff). hd:1...4294967295 for bulk reads. Displays a hexdump of the result
w	Followed by values to write byte(s). w:1...255 for bulk writes
0b	Write this binary value. Format is 0b00000000 for a byte, but partial bytes are also fine: 0b1001
0	Write this Octal value. Format is prefixed by a 0 (values from 000 to 077)
"	Write an ASCII-encoded string
0h/0x	Write this HEX value. Format is 0h01 or 0x01. Partial bytes are fine: 0xA. A-F can be lower-case or capital letters
0-255	Write this decimal value. Any number not preceded by 0x, 0h, or 0b is interpreted as a decimal value

Examples:

• Read Identification (0x9F): [ 0x9F r:3 ]

• Read Data (0x03) at the address (0x00:3) and read 32 bytes (hd:32) [ 0x03 0x00:3 hd:32 ]

References

• HydraBus/HydraFW wiki - Benjamin Vernoux - Jan 21, 2021

• HydraBus v1.0 Specifications - HydraBus

• HydraBus Assembly Video - Lab401 - 30 may 2017

• BlackAlps17: Hydrabus: Lowering the entry fee to the IoT bugfest - Benjamin Vernoux - 2 dec. 2017

• HydraBus - An Open Source Platform - RMLL Sec 2017

• Ph0wn, my first IoT CTF - Part 3 - Sebastien Andrivet - Dec. 19, 2018

• Getting Started with HydraBus flash and use hydrafw on linux - Benjamin Vernoux - 05/02/2024