sim-hyunkyu / dfubootloader

STM32 USB device bootloader using DFU class interface

DFU Bootloader

This repository contains a generic USB device bootloader firmware for STM32 controllers.

Features

• Fully-featured DFU class (with support to STMicroelectronics protocol Extension) USB device
• Small footprint: consumes only 8kB flash with -Os (50% smaller than the STM32Cube solution)
• The DFU interface is allocated to a fixed address, so it can be mounted on the application's USB device, allowing convenient entry to firmware update mode
• Easy to port on virtually any STM32 device that is supported by STM32_XPD
• C# CLI application available for performing the update: LibUsbDfu

How to build

Simply run make with the following arguments:

Symbol Name	Use
SERIES	The series of the STM32 device
TARGET_HEADER	String of the device-specific STM32_XPD header
APP_ADDRESS	Value of the application's flash start address
APP_SIZE	The total available flash space for the application in bytes
TOTAL_ERASE_MS	Average erase time of the application flash area
VID	Vendor ID of the USB device in hexadecimal format (no prefix)
PID	Product ID of the USB device in hexadecimal format (no prefix)
DFUSE	Set to 1 if DFUSE protocol is desired
DESC_STR	DFUSE specific flash layout descriptor string
BINPATH	Path to build toolchain binaries (/usr/bin by default)

An example for an STM32F042K6 device with (VID,PID)={FFFF,FFFF}:

make TARGET_HEADER="\<stm32f042x6.h\>" SERIES=STM32F0 APP_ADDRESS=0x08002000 APP_SIZE=24568 TOTAL_ERASE_MS=480 VID=FFFF PID=FFFF

Further examples can be found in .travis.yml.

Built with GCC. (arm-atollic-eabi- is preferred over arm-none-eabi- as it provides better size optimization)