Updating firmware of Stm32 CPU via Bluetooth by using Bluetooth-to-Serial module

Application for updating firmware of Stm32 CPU via Bluetooth by using Bluetooth-to-Serial modules.

It support modules with classic bluetooth SPP protocol (i.e. HC-06) and also BLE modules on microcontroller cc254x (i.e. HM-10)

Realization of the application is based on next documents from company STMicroelectronics.

1. AN2606 STM32 microcontroller system memory boot mode

2. AN3155 USART protocol used in the STM32 bootloader

How to use application.

PREPARATION

1. Set correct serial configuration in Bluetooth-to-Serial module. It should be 8 bits, even parity and 1 Stop bit and baud rate from 1200 to 115200. How set configuration read in datasheet for your Bluetooth-to-Serial module.

2. Connect Bluetooth-to-Serial module to your Stm32 board.

In general r Stm32 uses next pines for serial bootloader

PA10 (USART RX) and PA9 (USART_TX)

3. Activate bootloader mode for Stm32. How to do this read in AN2606. In general you should set pins BOOT0 and BOOT1 in correct combination according to model of your CPU.

PROGRAMMING

1. Turn on bluetooth in you phone and connect to Bluetooth-to-Serial module

2. Select file with firmware you want to write.

Firmware file should be in one of following format

- Intel hex

- Motorola S-Record

- Raw binary

3. Set writing options you need. You can select next options

- Erase only necessary pages

- Unset readout protection if need

- Set readout protection after writing

- Go CPU after programming

4. Press button "Load file to flash" and wait for finish of operation.

Additionaly in application available next operation

- Erasing

- Checking flash for blank

- Compare flash with file.

You can select this operation via apropriated point in menu.

Application is checked on next CPU:

Stm32F072

Stm32F103

Stm32F302

Stm32F401

Stm32F411 checked by user

Stm32L053

Stm32L152

Stm32L432

Stm32G071

Stm32G474

RESTRICTION OF USING

You can make till 25 firmware uploading fully free.

After you achieved this limit you can purchase one of two services

1. additional 100 uploading

2. unlimited using of application.