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 provided by 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. For detailed instructions on how to do this, refer to AN2606. Generally, you should set the pins BOOT0 and BOOT1 in the correct combination according to your CPU model.

PROGRAMMING

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

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

2. Set the writing options as needed. You can select from the following options:

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

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

Additional Operations Available in the Application

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

You can select these operations via the appropriate menu points.

Compatibility

The application has been tested and verified 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. An additional 100 uploads.
2. Unlimited use of the application.