This contains the absolute bare minimum needed to compile a blinky example for the STM32F401xE on the command line with gcc and make and then flash it to the demo board with OpenOCD. It is using the original headers provided by STM and ARM but only those for the core and peripheral registers, none of the HAL or any other optional libs.
The startup code has been implemented from scratch and the linker script has been taken from the gcc distribution and adapted for this controller and therefore none of these files have any Atollic copyright anymore. Startup code and SystemInit have been implemented in plain C and are together in one file gcc_startup_system.c.
- install Linux on your PC
- get a NUCLEO-F401RE demo board from STMicroelectronics
- install the official arm-none-eabi-gcc toolchain from Launchpad
- install OpenOCD
- add this line to your udev rules (permissions for the STLink on the NUCLEO board)
ACTION=="add|change", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="374b", MODE="664", GROUP="plugdev"
- clone this repository
- connect the NUCLEO board
$ make install- watch the green LED blink while studying the reference manual
happy hacking :-)