Flash firmware to STM32 microcontrollers using Python.
Python script to upload or download firmware to / from ST Microelectronics STM32 microcontrollers over UART.
Also supports ST BlueNRG devices, and the SweetPeas bootloader for Wiznet W7500.
Compatible with Python version 3.4 to 3.8 or 2.7.
./stm32loader.py [-hqVewvrsRB] [-l length] [-p port] [-b baud] [-P parity] [-a address] [-g address] [-f family] [file.bin] -e Erase (note: this is required on previously written memory) -u Readout unprotect -w Write file content to flash -v Verify flash content versus local file (recommended) -r Read from flash and store in local file -l length Length of read -p port Serial port (default: /dev/tty.usbserial-ftCYPMYJ) -b baud Baud speed (default: 115200) -a address Target address (default: 0x08000000) -g address Start executing from address (0x08000000, usually) -f family Device family to read out device UID and flash size; e.g F1 for STM32F1xx -h Print this help text -q Quiet mode -V Verbose mode -s Swap RTS and DTR: use RTS for reset and DTR for boot0 -R Make reset active high -B Make boot0 active low -u Readout unprotect -n No progress: don't show progress bar -P parity Parity: "even" for STM32 (default), "none" for BlueNRG
stm32loader.py -p /dev/tty.usbserial-ftCYPMYJ -e -w -v somefile.bin
This will pre-erase flash, write
somefile.bin to the flash on the device, and then
perform a verification after writing is finished.
You can skip the
-p option by configuring environment variable
-f may be supplied through
To read out firmware and store it in a file:
stm32loader.py -r -p /dev/cu.usbserial-A5XK3RJT -f F1 -l 0x10000 -a 0x08000000 dump.bin
- ST AN2606: STM32 microcontroller system memory boot mode
- ST AN3155: USART protocol used in the STM32 bootloader
- ST AN4872: BlueNRG-1 and BlueNRG-2 UART bootloader protocol
Original Version by Ivan A-R (tuxotronic.org). Contributions by Domen Puncer, James Snyder, Floris Lambrechts, Atokulus, sam-bristow, NINI1988, Omer Kilic, Szymon Szantula, rdaforno, Mikolaj Stawiski, Tyler Coy, Alex Klimaj, Ondrej Mikle.
Inspiration for features from:
Configurable RTS/DTR and polarity, extended erase with pages: https://github.com/pazzarpj/stm32loader
Memory unprotect https://github.com/3drobotics/stm32loader
Correct checksum calculation for paged erase: https://github.com/jsnyder/stm32loader/pull/4
ST BlueNRG chip support https://github.com/lchish/stm32loader
Wiznet W7500 chip / SweetPeas custom bootloader support https://github.com/Sweet-Peas/WiznetLoader
The below assumes you are connecting an STM32F10x. For other chips, the serial pins and/or the BOOT0 / BOOT1 values may differ.
Make the following connections:
- Serial adapter GND to MCU GND.
- Serial adapter power to MCU power or vice versa (either 3.3 or 5 Volt).
- Note if you're using 5 Volt signaling or 3V3 on the serial adapter.
- Serial TX to MCU RX (PA10).
- Serial RX to MCU TX (PA9).
- Serial DTR to MCU RESET.
- Serial RTS to MCU BOOT0 (or BOOT0 to 3.3V).
- MCU BOOT1 to GND.
If either RTS or DTR are not available on your serial adapter, you'll have to manually push buttons or work with jumpers. When given a choice, set BOOT0 manually high and drive reset through the serial adepter (it needs to toggle, whereas BOOT0 does not).
Not currently supported
- Command-line argument for readout protection
- Command-line argument for write protection/unprotection
- STM8 devices (ST UM0560)
- Paged flash erase for devices with page size <> 1 KiB
- Other bootloader protocols (e.g. I2C, HEX -> implemented in stm32flash)
- Use proper logging instead of print statements
- Try Azure pipelines for CI
- Support PyPy, PyPy3
- Drop Python2 support; start using intenum for commands and replies
- Determine flash page size or make this configurable
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