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STM32 development under Linux

YouTube demo

https://youtu.be/57-iolU-PpE

Cheap startup hardware

USB JTAG Jlink clone
https://ru.aliexpress.com/item/New-JLink-OB-ARM-Emulator-Debugger-Programmer-Downloader-for-Replace-V8-SWD-M74/32827782488.html?spm=a2g0v.10010108.1000014.5.63f67f76c8Ikyq&pvid=de125860-82b2-43f4-a546-0bd2bf70b9c7&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.13338.112235.000000000000000&scm-url=1007.13338.112235.000000000000000&scm_id=1007.13338.112235.000000000000000

Evaluation STM32 board
https://ru.aliexpress.com/item/STM32F103C8T6-ARM-STM32-arduino/32887666464.html?spm=2114.13010708.0.0.134f33edtKnEcc

Board description:

https://wiki.stm32duino.com/index.php?title=Blue_Pill#Software_installation

Flashing tools

https://www.segger.com/downloads/flasher/
Select product for your operation system. In case of Ubuntu 64 bit use: J-Link Software and Documentation pack for Linux, DEB installer, 64-bit. To flash/erase use JFlashLiteExe.

Development tools

GNU Arm Embedded Toolchain
https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads

openocd
Available as package in most Linux distros.

OpenOCD debugging

Start server

openocd -f openocd/jlink.cfg -f openocd/stm32f1x.cfg

Start client

<path_to_your_toolchain>/bin/arm-none-eabi-gdb -ex "target remote localhost:3333" <your_generated_elf_file>

Download binary file

monitor reset halt
load
monitor reset run

General commands:

command description
monitor reset halt reset MCU and stop
continue run SW (to stop Ctrl+C)
next/nexti next codeline/instruction
step/stepi next codeline/instruction with entering functions
finish exit from current function
until run until reach line greater current (loop exit)
list/list- show 10 code lines down/up
break < function, line, file:line > add breakpoint
break *0x< address > add breakpoint on hw address
watch < variable > set watchpoint on write to variable
watch *0x< address > set watchpoint on write to address
rwatch < variable > set watchpoint on read from variable
awatch < variable > set watchpoint on read or write variable
print < variable > show variable
display < variable > add variable to watch list
info breakpoints/dispaly show breakpoints/watchpoints information
delete breakpoint/dispaly < id > delete breakpoint/watchpoint by id from display
enable breakpoint/dispaly < id > enable breakpoint/watchpoint by id from display
disable breakpoint/dispaly < id > disable breakpoint/watchpoint by id from display
set < variable >:=< value > assign new value to variable
info registers show registers
monitor reg add registers to permanent watch
backtrace show stack
quit exit debugger

gdb GUI

ddd - The Data Display Debugger Available as package in most Linux distros.

Start ddd

ddd <your_generated_elf_file> --debugger "<path_to_your_toolchain>/bin/arm-none-eabi-gdb"

Connect to gdb server (issue command in command window)

target extended-remote :3333

SEGGER's Real Time Transfer (RTT)

It's JTAG console like semihosting but seems to be more fast and flexible. https://www.segger.com/products/debug-probes/j-link/technology/about-real-time-transfer/ Installation described in section Flashing tools

Project SW components

Segger RTT
https://www.segger.com/products/debug-probes/j-link/technology/about-real-time-transfer/

Free RTOS
https://www.freertos.org/

STM32F10x standard peripheral library
https://www.st.com/content/st_com/en/products/embedded-software/mcu-mpu-embedded-software/stm32-embedded-software/stm32-standard-peripheral-libraries/stsw-stm32054.html

Quick start guide

Install tools

wget https://developer.arm.com/-/media/Files/downloads/gnu-rm/8-2018q4/gcc-arm-none-eabi-8-2018-q4-major-linux.tar.bz2?revision=d830f9dd-cd4f-406d-8672-cca9210dd220?product=GNU%20Arm%20Embedded%20Toolchain,64-bit,,Linux,8-2018-q4-major
sudo tar xjC /opt/ -f 'gcc-arm-none-eabi-8-2018-q4-major-linux.tar.bz2?revision=d830f9dd-cd4f-406d-8672-cca9210dd220?product=GNU Arm Embedded Toolchain,64-bit,,Linux,8-2018-q4-major'

sudo apt-get install openocd make ddd

wget https://www.segger.com/downloads/flasher/JLink_Linux_x86_64.deb
sudo dpkg -i JLink_Linux_x86_64.deb
export LD_LIBRARY_PATH="/opt/SEGGER/JLink"

Note:
To persist LD_LIBRARY_PATH after reboot add the next lines to the end of your ~/.bashrc

if [ -d "/opt/SEGGER/JLink" ] ; then
    export LD_LIBRARY_PATH="/opt/SEGGER/JLink"
fi

Obtain STM32 project template

git clone https://github.com/andriy-bilynskyy/STM32-Linux.git
cd cd STM32-Linux/

Build and flash

make build
make flash

Note:
Use make help to see all options: debug, console...

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