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dump
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xpack-openocd-0.10.0-15
xpack-openocd-0.10.0-15
 
 
Makefile
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README.md
README.md
 
 
dump.ruby
dump.ruby
 
 
stlink.cfg
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vs11k09a-1.cfg
vs11k09a-1.cfg
 
 
vs11k09a-2.cfg
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Blitzwolf BW-KB1 Firmware Reverse Engineering

It is based on the wor on DK63 from smp4488.

VID 0x05AC

PID 0x024F

VID 0C45 is not used for this keyboard therefore for uploading the firmware via USB interface, it is needes to update the VIC and PID to the above.

For default flashing: Bus 001 Device 006: ID 0c45:7044 Microdia.

or Bus 001 Device 011: ID 0c45:7040 Microdia

For keyboard: Bus 001 Device 009: ID 05ac:024f Apple, Inc.

This project is to reverse engineer the Kmove / DIERYA DK63 to get QMK running on it. Use this information at your own risk. I'm not liable if you break something.

Keyboard

Tasks

  • Identify MCU VS11K09A-1 / Sonix SN32F248BF
  • Find data sheet VS11K09A-1 / Sonix SN32F248B
  • Find SDK and dev tools
  • Get SWD working
  • Ability to flash firmware
  • Get origional firmware
  • Enable SWD in current firmware
  • Port Chibios to Sonix SN32F248BF porting guide
    • Get compiler to work with SN32F248BF Keil packs
    • USB LLD
    • GPIO LLD
    • UART LLD
    • Timers LLD
    • SPI LLD
    • I2C LLD
  • Get QMK firmware working
  • Dump origional bootloader

Flashing

  • Download this flashing software for windows: SONiX_USB_MCU_ISP_Tool_V2.3.1.7-.zip

  • Put your keyboard in boot/recovery/flash mode via connecting boot pin to ground before connecting the keyboard via USB.

  • Then flash the binary via the software after setting the following configuration:

image image image image

Chips

Name Start End Length R W X Volatile Overlay Type Initialized Byte Source Source Comment
ram 00000000 0000ffff 0x10000 true true true false false Default true File: blitzwolf-kb1.bin: 0x0 Binary Loader
Boot-ROM 1fff0000 1fff0bff 0xc00 true true false false false Default false
SRAM 20000000 20001fff 0x2000 true true false false false Default false
SN_CT16B0 40000000 40001fff 0x2000 true true false true false Default false Generated by SVD-Loader.
SN_CT16B1 40002000 40003fff 0x2000 true true false true false Default false
SN_WDT 40010000 40011fff 0x2000 true true false true false Default false Generated by SVD-Loader.
SN_UART2 40012000 40013fff 0x2000 true true false true false Default false
SN_UART1 40014000 40015fff 0x2000 true true false true false Default false
SN_UART0 40016000 40017fff 0x2000 true true false true false Default false
SN_I2C0 40018000 40019fff 0x2000 true true false true false Default false
SN_SPI0 4001c000 4001dfff 0x2000 true true false true false Default false Generated by SVD-Loader.
SN_ADC 40026000 40027fff 0x2000 true true false true false Default false Generated by SVD-Loader.
SN_PMU 40032000 40033fff 0x2000 true true false true false Default false Generated by SVD-Loader.
SN_PFPA 40042000 40043fff 0x2000 true true false true false Default false Generated by SVD-Loader.
SN_GPIO0 40044000 40045fff 0x2000 true true false true false Default false
SN_GPIO1 40046000 40047fff 0x2000 true true false true false Default false
SN_GPIO2 40048000 40049fff 0x2000 true true false true false Default false
SN_GPIO3 4004a000 4004bfff 0x2000 true true false true false Default false
SN_USB 4005c000 4005dfff 0x2000 true true false true false Default false Generated by SVD-Loader.
SN_SYS1 4005e000 4005ffff 0x2000 true true false true false Default false
SN_SYS0 40060000 40061fff 0x2000 true true false true false Default false
SN_FMC 40062000 40063fff 0x2000 true true false true false Default false

Evision VS11K09A-1 Debug Recovery Mode / SWD

  1. Hookup SWCLK, SWDIO, and Ground using the testpoints outlined below connections
    • Note: These pins are being use by the MCU to control functionality. Im tyring to enable SWD in the default firmware to debug without Debug Recovery Mode.
  2. Hookup the other ends of the wires to your debugger. I used a Raspberry PI 3 and the ST-Link V2.
  3. Using the ground point hold the boot pin to ground while turning on the power.

Key Matrix & MCU

Keyboard Layout www.keyboard-layout-editor.com

Keyboard-layout

Key-Matrix

Key-Matrix-MCU-Pins

MCU-Pins

BW-KB1-Keyboard-PCB

BW-KB1-Bluetooth-CYW20730

LEDs

They seem to be driven by GPIO and transistors.

  • Figure out pin map and matrix
  • Caps lock LED

Bluetooth

Appears to be an another ARM Cortex M0 MCU with UART and GPIO.

  • SWD debugging
  • Pin map to main MCU

Extract default dk63 firmware.hex

  1. Download Resource Hacker (Not sure of a mac or linux variant)
  2. Download Firmware Update tool
  3. Extract the firmware .rar and open the .exe in RH
  4. Look for RCData 4000:0, this is the hex file of the firmware
  5. Right click on 4000:0 and choose Save Resource to BIN file
  6. Save the firmware so it can be examined or uplodaded.

Firmware Flash

  1. Download the USB MCU ISP tool
  2. Open the program and click load file.
  3. Select SN32F4xB and then the firmware file.
  4. The VID should alread be 0C45 and enter 766B for the PID.
  5. Click Start
  6. Profit!

ST-Link V2

  • I was not able to get this to work with the st-link software on windows.
  • I did manage to get it to work with openocd using this config
  • Working on the SN32F24X config here

Firmware Dump

GDB Recovery Mode

  1. set $pc=0x1FFF0301
  2. cont

Docker

Tools

Links

Firmware Updater Executable Analysis https://www.hybrid-analysis.com/sample/21cf79c4f5982e0d73e8269c03a043f16898292920074491d5452eea5155e1eb?environmentId=100

VS11K09A-1 VS 32-Bit Cortex-M0 Micro-Controller http://evision.net.cn/include/upload/kind/file/20190413/20190413174647_5965.pdf

DEF CON 26 IoT VILLAGE - Dennis Giese - How to modify ARM Cortex M based firmware A step by step app https://www.youtube.com/watch?v=Qvxa6o2oNS0

BalCCon2k16 - Travis Goodspeed - Nifty Tricks for ARM Firmware Reverse Engineering https://www.youtube.com/watch?v=GX8-K4TssjY

Getting STLink V2 Serial Number https://armprojects.wordpress.com/2016/08/21/debugging-multiple-stm32-in-eclipse-with-st-link-v2-and-openocd/

SUE 2017 - Reverse Engineering Embedded ARM Devices - by pancake https://www.youtube.com/watch?v=oXSx0Qo2Upk

Analyzing Keyboard Firmware https://mrexodia.github.io/reversing/2019/09/28/Analyzing-keyboard-firmware-part-1 https://mrexodia.github.io/reversing/2019/09/28/Analyzing-keyboard-firmware-part-2 https://mrexodia.github.io/reversing/2019/09/28/Analyzing-keyboard-firmware-part-3

Hacking the fx-CP400 https://the6p4c.github.io/2018/01/15/hacking-the-gc-part-1.html

Raspberry PI OpenOCD SWD / JTAG https://iosoft.blog/2019/01/28/raspberry-pi-openocd/

OpenOcd Creating Flash Drivers https://github.com/doctek/COOCDFlash/wiki/Creating-and-using-flash-drivers

Stack Exchange ARM Firmware Reverse Engineering Walkthrough https://reverseengineering.stackexchange.com/questions/15311/running-a-binary-identified-as-an-arm-excutable-by-binwalk-disasm/15317 https://reverseengineering.stackexchange.com/questions/15006/approach-to-extract-useful-information-from-binary-file

QMK Nuvoton Port PR [qmk/ChibiOS-Contrib#10]

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