Updating Firmware of STM32 CPU via USB Cable Using USB DFU Protocol

Application for Updating Firmware of STM32 CPU via USB Cable Using USB DFU Protocol

The realization of this application is based on the following documents from STMicroelectronics:

1. AN2606: STM32 Microcontroller System Memory Boot Mode
2. AN3156: USB DFU Protocol Used in the STM32 Bootloader

How to Use the Application

Prerequisite

• Your mobile device must support USB-OTG.

Preparation

1. Connect the STM32 board to your mobile device using a USB-OTG cable.
2. Activate the bootloader mode for the STM32. Refer to AN2606 for detailed instructions. Generally, you need to set the pins BOOT0 and BOOT1 in the correct combination according to your CPU model.

Programming

1. Select the Firmware File: Choose the firmware file you want to write. The file should be in one of the following formats:

   • Intel hex
   • Motorola S-Record
   • DfuSe (STMicroelectronics DFU format)
   • Raw binary

2. Set Writing Options: You can select the following options:

   • Erase only necessary pages
   • Unset readout protection if needed
   • Go CPU after programming

3. Initiate Programming: Press the "Load file to flash" button and wait for the operation to complete.

Additional Operations

The application also supports the following operations, which can be selected via the appropriate menu options:

• Erasing
• Checking flash for blank
• Comparing flash with file

Tested Models

The application has been tested on the following STM32 microcontroller models:

• STM32F072
• STM32F205
• STM32F302
• STM32F401
• STM32F746
• STM32G474
• STM32L432

Restrictions on Use

You can perform up to 25 firmware uploads completely free of charge. After reaching this limit, you can purchase one of the following services:

1. Additional 100 uploads
2. Unlimited use of the application