Update 9 FEB 2015: this fork is to work with STM32 Primer1 http://www.stm32circle.com/resources/stm32primer.php it is not intended to work with CircleOS but to load standard STM32F103 code. doing this as they only provide windows support and I have one. code is not tested as yet! These days I would recommend using gcc-arm-embedded [1] with libopenCM3 [2] to provide everything you need to build projects for STM32 chips! Years ago all this faffing around was required but today these projects make life much much happier. [1] https://launchpad.net/gcc-arm-embedded [2] http://libopencm3.org/wiki/Main_Page Original: This is a skeleton project for an STM32F10x series device, using the GCC compiler (either vanilla or CodeSourcery). It is initially configured for a medium density STM32F103. To change target device, edit: stm.ld: update RAM and FLASH sizes in the MEMORY section makefile: update variables at the top of the file lib/CMSIS_CM3/system_stm32f10x.c: set system clock frequency and periphal frequencies as fractions of the system clock Put interrupt vectors into interrupts.c (and prototypes into .h) or any other c file which will be compiled into the final binary. Valid interrupt vector names are given in lib/CMSIS/startup/gcc/startup_stm32f10x_*.s at the bottom. Update lib/STM32F10x_StdPeriph_Driver/stm32f10x_conf.h to set which peripheral functions you wish to use from the library. If using the USB library, you may need to edit lib/STM32_USB-FS-Device_Driver/ usb_conf.h depending on your application. You'll also need the various usb_* files for USB projects, such as pwr, prop, istr, endp and desc. A python script to send binary images to an STM32 via the serial bootloader is also included. Edit appropriate settings in the makefile and make sure BOOT0 is pulled high on reset, then 'make reload'. Change BOOT0 to low to boot from flash memory after bootloading. JTAG configuration files are provided but untested and may require modification for your programmer or device type. COPYRIGHT/LICENSE DETAILS: * STM32 libraries copyright 2009-2011 STMicroelectronics. License details given in each source file. * CMSIS library and code copyright ARM and STMicroelectronics. License details given in each source file. * Linker script copyright RAISONANCE S.A.S. 2008 and modified by P. Harrison of http://www.micromouseonline.com * Makefiles and JTAG configuration based on those released into the public domain by Lanchon of the ST forums. * stm32loader.py released by Ivan A-R of http://tuxotronic.org/wiki/projects/stm32loader and modified by P. Harrison. * Compilation by Adam Greig of https://github.com/adamgreig and released into the public domain, September 2009.