Updated according versions of datasheets: STM32F030 DS9773 v1.0 STM32F031 DS10111 v1.0 STM32F050 DS9262 v1.0 STM32F051 DS8668 v4.0 (updated RAM size) STM32F071 DS10009 v1.0 STM32F072 DS9826 v1.0 F1, F2 and F3 have no changes and no new datasheets. STM32F401 DS9716 v2.1 STM32F401 DS10086 v1.0 STM32F405 DS8626 v4.0 STM32F415 DS8597 v4.0 STM32F427 DS9405 v3.0 STM32F439 DS9484 v4.0 STM32L151 DS6876 v9.0 STM32L152 DS8576 v6.0 STM32L152 DS8890 v6.0 STM32L162 DS8669 v4.0 STM32L162 DS8928 v5.0 STM32L100 DS9496 v1.0 STM32L100 DS9821 v1.0
------------------------------------------------------------------------------ README ------------------------------------------------------------------------------ The libopencm3 project aims to create an open-source firmware library for various ARM Cortex-M3 microcontrollers. Currently (at least partly) supported microcontrollers: - ST STM32F1 series - ST STM32F2 series - ST STM32F4 series - NXP LPC1311/13/42/43 The library is written completely from scratch based on the vendor datasheets, programming manuals, and application notes. The code is meant to be used with a GCC toolchain for ARM (arm-elf or arm-none-eabi), flashing of the code to a microcontroller can be done using the OpenOCD ARM JTAG software. Status and API -------------- The libopencm3 project is currently work in progress. Not all subsystems of the microcontrollers are supported, yet. IMPORTANT: The API of the library is NOT yet considered stable! Please do not rely on it, yet! Changes to function names, macro names etc. can happen at any time without prior notice! TIP: Include this repository as a GIT submodule in your project. To make sure your users get the right version of the library to compile your project. For how that can be done refer to the libopencm3-examples repository. Prerequisites ------------- Building requires python. (Some code is generated) For Ubuntu/Fedora, you already have everything you need. For Windows Download and install: msys - sourceforge.net/projects/mingw/files/MSYS/Base/msys-core/msys-1.0.11/MSYS-1.0.11.exe Python - http://www.python.org/ftp/python/2.7/python-2.7.msi (use installer to get the right registry keys for PyYAML) arm-none-eabi toolchain - for example this one https://launchpad.net/gcc-arm-embedded Run msys shell and set the path without standard Windows paths, so Windows programs such as 'find' won't interfere: export PATH="/c//Python27:/c/ARMToolchain/bin:/usr/local/bin:/usr/bin:/bin" After that you can navigate to the folder where you've extracted libopencm3 and build it. Building -------- $ make You may want to override the toolchain (e.g., arm-elf or arm-none-eabi): $ PREFIX=arm-none-eabi make For a more verbose build you can use $ make V=1 Fine-tuning the build --------------------- The build may be fine-tuned with a limited number of parameters, by specifying them as environment variables, for example: $ VARIABLE=value make * FP_FLAGS - Control the floating-point ABI If the Cortex-M core supports a hard float ABI, it will be compiled with floating-point support by default. In cases where this is not desired, the behavior can be specified by setting FP_FLAGS. Currently, M4F cores default to "-mfloat-abi=hard -mfpu=fpv4-sp-d16" and others to no FP flags Examples: $ FP_FLAGS="-mfloat-abi=soft" make # No hardfloat $ FP_FLAGS="-mfloat-abi=hard -mfpu=magic" make # New FPU we don't know of Example projects ---------------- The libopencm3 community has written and is maintaining a huge collection of examples, displaying the capabilities and uses of the library. You can find all of them in the libopencm3-examples repository: https://github.com/libopencm3/libopencm3-examples Installation ------------ $ make install This will install the library into /usr/local. (permissions permitting) If you want to install it elsewhere, use the following syntax: $ make DESTDIR=/opt/libopencm3 install If you want to attempt to install into your toolchain, use this: $ make DETECT_TOOLCHAIN=1 install Note: If you install this into your toolchain, you don't need to pass any extra -L or -I flags into your projects. However, this also means you must NOT pass any -L or -I flags that point into the toolchain. This _will_ confuse the linker. (ie, for summon-arm-toolchain, do NOT pass -L/home/user/sat/lib) Common symptoms of confusing the linker are hard faults caused by branches into arm code. You can use objdump to check for this in your final elf. Coding style and development guidelines --------------------------------------- See HACKING. License ------- The libopencm3 code is released under the terms of the GNU Lesser General Public License (LGPL), version 3 or later. See COPYING.GPL3 and COPYING.LGPL3 for details. IRC --- * You can reach us in #libopencm3 on the freenode IRC network. Mailing lists ------------- * Developer mailing list (for patches and discussions): https://lists.sourceforge.net/lists/listinfo/libopencm3-devel * Commits mailing list (receives one mail per 'git push'): https://lists.sourceforge.net/lists/listinfo/libopencm3-commits Website ------- http://libopencm3.org http://sourceforge.net/projects/libopencm3/
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