cd examples/hello-world/
make BOARD=stm32f4discovery
cd examples/hello-world/
make flash BOARD=stm32f4discovery
Launch the server:
cd examples/hello-world
st-util -v
Launch the client
cd examples/hello-world
arm-none-eabi-gdb -tui bin/stm32f4discovery/hello-world.elf -ex 'target remote localhost:4242'