refleks-lite/arcadestick_software/DFU.md

Refleks Lite Bootloader and DFU Guide

Flash layout

Region	Start address	Size	USB identity
Bootloader / DFU	0x08000000	24 KB	1209:E667
App1 / XInput	0x08006000	52 KB	1209:E668
App2 / DInput	0x08013000	52 KB	1209:E669

For initial programming, flash build/Release/arcadestick_full.hex with an ST-Link. This file contains the bootloader and both applications.

Boot selection

• Hold START during reset to keep the device in DFU mode.
• When PA4 is LOW, the bootloader starts XInput App1.
• When PA5 is LOW, the bootloader starts DInput App2.
• If the selection is invalid, or the selected application's vector table is invalid, the bootloader remains in DFU mode.

Updating over USB

The bootloader implements standard USB DFU 1.1. It does not use DfuSe address commands; the alternate interface number selects the destination slot.

# XInput App1
dfu-util -d 1209:e667 -a 0 -D build/Release/arcadestick_xinput.bin

# DInput App2
dfu-util -d 1209:e667 -a 1 -D build/Release/arcadestick.bin

On Windows, the 1209:E667 device must use the WinUSB driver. dfu-util is not currently installed in this computer's PATH.