So far I have been flashing boards via UART or SWD interface using STM32 Cube Programmer. An open source alternative to flash via UART is stm32flash.
Linux Build and Install
stm32flash project is hosted on SourceForge and the git repository is mirrored on gitlab.
I clone the repository from Sourceforge in my Projects folder.
$ cd ~/Projects $ git clone https://git.code.sf.net/p/stm32flash/code stm32flash-code Cloning into 'stm32flash-code'... remote: Enumerating objects: 1357, done. remote: Counting objects: 100% (1357/1357), done. remote: Compressing objects: 100% (682/682), done. remote: Total 1357 (delta 912), reused 996 (delta 671) Receiving objects: 100% (1357/1357), 1.04 MiB | 74.00 KiB/s, done. Resolving deltas: 100% (912/912), done.
Build on Linux doesn’t show any warnings.
$ cd stm32flash-code $ make cc -Wall -g -c -o dev_table.o dev_table.c cc -Wall -g -c -o i2c.o i2c.c cc -Wall -g -c -o init.o init.c cc -Wall -g -c -o main.o main.c cc -Wall -g -c -o port.o port.c cc -Wall -g -c -o serial_common.o serial_common.c cc -Wall -g -c -o serial_platform.o serial_platform.c cc -Wall -g -c -o stm32.o stm32.c cc -Wall -g -c -o utils.o utils.c cd parsers && make parsers.a make: Entering directory '~/Projects/stm32flash-code/parsers' cc -Wall -g -c -o binary.o binary.c cc -Wall -g -c -o hex.o hex.c ar rc parsers.a binary.o hex.o make: Leaving directory '~/Projects/stm32flash-code/parsers' cc -o stm32flash dev_table.o i2c.o init.o main.o port.o serial_common.o serial_platform.o stm32.o utils.o parsers/parsers.a
I test the newly compiled command by calling it without argument
./stm32flah and with the serial port where the USB to UART adapter is
./stm32flash gives a detailed help of the command.
Calling it with the serial port argument where the board is plugged in and set in bootloader mode gives a description of the chipset detected.
$ ./stm32flash /dev/ttyUSB0 stm32flash 0.5 http://stm32flash.sourceforge.net/ Interface serial_posix: 57600 8E1 Version : 0x31 Option 1 : 0x00 Option 2 : 0x00 Device ID : 0x0444 (STM32F03xx4/6) - RAM : Up to 4KiB (2048b reserved by bootloader) - Flash : Up to 32KiB (size first sector: 4x1024) - Option RAM : 16b - System RAM : 3KiB
I install the command by moving the executable to my local bin directory.
$ mv stm32flash ~/bin
If everything goes well, I will later
strip and compress (with
As my board has been already flashed using STM32 Cube Programmer, I can perform a simple regression test.
Read the content of the chipset memory as prviously flashed.
Flash the same executable using Linux version of stm32flash.
Read back the newly programmed chipset memory.
Compare the two read-outs.
Reading 1 KB with stm32flash.
$ stm32flash -r read.bin -S 0x08000000:1024 /dev/ttyUSB0
Writing the executable in hex format.
$ stm32flash -w f030f4.hex /dev/ttyUSB0
Comparing the memory read-out using
od, there is no difference
Build and Install on Windows
There is a Windows binary that can be downloaded from stm32flash project page on SourceForge. But I did clone and build using both Cygwin and MSYS2 64bit environments on Windows.
The build phase gave more warnings than the Linux version, this is mostly due to stricter warnings in the GCC compiler version.
stm32flash only differs in the name of the serial device, in my
case COM4 instead of /dev/ttyUSB0.
There is several other Windows applications available on ST.com for flashing STM32 chipsets: STM32 ST-Link Utility, STM32 Flash Loader Demonstrator, ST Visual Programmer STM32. They have been marked as NRND (Not Recommended for New Design), which means they won’t support latest chipsets as they are replaced by STM32 Cube Programmer.
Next I will write an application which make better use of transmission than hello.
© 2020-2021 Renaud Fivet