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* stm32f4: 32bit-float-friendly GCC flagsbnewbold2015-03-031-1/+2
| | | | | | | | | | | | | | This commit makes 'float' (32-bit) the default for floating point constants in the source code, instead of the defaults 'double' (64-bit). Floating point performance is very sensitive to the float vs. double distinction on 32-bit processors, especially Cortex-M4s with a VFP unit for floats but not doubles. In the future it may be wise to make this change for non-hard-fp chips (aka, all the other STM32s) as well, for behavioral consistancy. The warning flag ensures that the frequently used parts of the code base will be less ambiguous, but doesn't cover series-specific code.
* stm32f4: series-specific linker flagsbnewbold2015-03-031-1/+3
| | | | Also refactors STM32F2-F4 linker files into sub-series directories.
* Rename various "stm32f2" directories "stm32f2-f4".Marti Bolivar2014-11-241-7/+15
| | | | | | Preparatory patch for adding STM32F4 support. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Makefile: Don't assume Cortex M3.Marti Bolivar2012-08-051-1/+11
| | | | | | | | | Instead, derive -march and -mcpu from the target MCU in target-config.mk. Also (on STM32F4) add the necessary floating point flags. The CodeSourcery toolchains don't support these, so we'll need to prepare alternative toolchains when F4 support is official. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Fix botched TARGET_LDFLAGS.Marti Bolivar2012-06-261-3/+3
| | | | | | | Works with officially supported CodeSourcery toolchain. May need tweaks for users with a more modern arm-none-eabi-g++. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Merge branch 'wip-family-support'Marti Bolivar2012-06-261-64/+33
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge the long-lived (too long; future changes like these will need to proceed more incrementally) development branch of libmaple, containing experimental STM32F2 and STM32F1 value line support, into master. This required many changes to the structure of the library. The most important structural reorganizations occurred in: - 954f9e5: moves public headers to include directories - 3efa313: uses "series" instead of "family" - c0d60e3: adds board files to the build system, to make it easier to add new boards - 096d86c: adds build logic for targeting different STM32 series (e.g. STM32F1, STM32F2) This last commit in particular (096d86c) is the basis for the repartitioning of libmaple into portable sections, which work on all supported MCUs, and nonportable sections, which are segregated into separate directories and contain all series-specific code. Moving existing STM32F1-only code into libmaple/stm32f1 and wirish/stm32f1, along with adding equivalents under .../stm32f2 directories, was the principal project of this branch. Important API changes occur in several places. Existing code is still expected to work on STM32F1 targets, but there have been many deprecations. A detailed changelog explaining the situation needs to be prepared. F2 and F1 value line support is not complete; the merge is proceeding prematurely in this respect. We've been getting more libmaple patches from the community lately, and I'm worried that the merge conflicts with the old tree structure will become painful to manage. Conflicts: Makefile Resolved Makefile conflicts manually; this required propagating -Xlinker usage into support/make/target-config.mk. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
| * Rework linker scripts.Marti Bolivar2012-06-071-24/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Having separate linker scripts for all the boards is a bad idea. Most boards really only need to specify MEMORY and the appropriate REGION_ALIASES() so that support/ld/common.inc can do its work. Not having infrastructure for this leads to duplication -- viz. the Maple Mini linker scripts are identical to the Maple's, and the olimex_stm32_h103 linker directory is just a symlink to Maple's. Clearly, the current structure is wrong. To fix it, instead of having per-board subdirectories of support/ld/, add per-MEMORY subdirectories of (new) support/ld/stm32/mem/. The per-board .mk files under support/mk/board-includes/ now reference these directly, and target-config.mk and the Makefile handle this appropriately. We move some other stuff around in target-config.mk to make this all more convenient, and even allow more overriding of the libmaple defaults on a per-board basis. Custom board hacks will be easier now. Unfortunately, lots of duplication under support/ld/stm32/mem/ is necessary, as the LENGTH attribute in a MEMORY region specification doesn't support arithmetic expressions, and ld doesn't seem to have any way to specify MEMORY at the command line (why?!). If we find a better way than this, we should do it. If a board (e.g. Maple Native) _does_ really need special memory-related configuration, you can always put a per-board subdirectory of support/ld/stm32/mem. We do this here to configure the heap. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
| * Makefile: add list-boards target.Marti Bolivar2012-06-071-1/+1
| | | | | | | | | | | | | | | | | | As the number of boards increases, it's less practical to keep a list of them in the help target output (notice also that some have been forgotten). This target can't get out of date unless we change how the board-includes/ directory works. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
| * Slightly improve and generify the USB infrastructure.Marti Bolivar2012-06-031-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The good news is that <libmaple/usb.h> and <libmaple/usb_cdcacm.h> did turn out generic enough in what they specify to go on unchanged. However, we can't just go on assuming that there's USB just because we're on an F1. Now that there's value line in the tree, we need to be more careful (value line F1s don't have USB peripherals). To that end, make all the F1 board-includes/*.mk files specify what line their MCU is with an MCU_F1_LINE variable. Use that to hack libmaple/usb/rules.mk so we only try to build the USB module under appropriate circumstances. While we're at it, add a vector_symbols.inc for value line MCUs under support/ld/. We need this to get the target-config.mk modifications implied by the addition of MCU_F1_LINE. We'll fix up some other performance-line-isms under libmaple/stm32f1 in a separate commit. Also in libmaple/usb/: - Move everything into a new stm32f1 directory. Due to aforementioned rules.mk hacks, there is no immediate need for an stm32f2 directory (USB support doesn't exist there). - Update the README for style and content. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
| * Add build support for targeting multiple STM32 series.Marti Bolivar2012-04-111-6/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add an MCU_SERIES variable to each of the files under support/make/board-includes, which declares the series as "stm32f1" in each case. Use this in target-config.mk when determining LD_SERIES_PATH (with a hack since we only support performance line) and LIBMAPLE_MODULE_SERIES. We must move support/ld/stm32/series/f1 to .../series/stm32f1 as a side-effect. Adding support for other series (e.g. "stm32f2") should now be a matter of filling in the contents of libmaple/<series>/ and support/ld/stm32/<series>/ appropriately (along with moving the rest of the nonportable code out of the libmaple core and into the STM32F1 series submodule). Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
| * build system: Add board include files for target-config.mk.Marti Bolivar2012-04-111-45/+3
| | | | | | | | | | | | | | | | | | | | | | | | target-config.mk is getting a little long with all the boards in it. Break out the board-specific bits into individual files under support/make/board-includes. This has the added benefit that adding a new board requires less dirtying of the working tree, which is nice for jumping around branches with an experimental board. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
| * Great renaming: use "series" instead of "family".Marti Bolivar2012-04-111-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is for greater consistency with the ST application notes, which refer to migrating "across" series (e.g. F1 to F2), but compatibility "within" a family (e.g. F1). So: - Move libmaple/stm32x/include/family to .../include/series/ and fix up includes appropriately. - Refer to "family" headers as "series" headers in comments. - Make similar "find and replace"-style changes to build system variable names and comments. - Move support/ld/stm32/family to .../stm32/series. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
| * Rename GLOBAL_FLAGS to TARGET_FLAGS, remove from Makefile.Marti Bolivar2012-04-111-0/+15
| | | | | | | | | | | | | | | | Move into target-config.mk. Build it up bit-by-bit as the build goes on. Repeat the DENSITY defines once per board in target-config.mk, since they don't make sense on STM32F2. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
| * target-config.mk: Remove FLASH_SIZE, SRAM_SIZE settings.Marti Bolivar2012-04-111-10/+0
| | | | | | | | | | | | Unused. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
| * Tweak family-specific linker file layout.Marti Bolivar2012-04-111-1/+1
|/ | | | | | | | | | | | | Move support/ld/stm32/f1/performance/vector_symbols.inc to support/ld/stm32/family/f1/performance/vector_symbols.inc Creating directory "family" under support/ld/stm32 will allow parallel directories (e.g. support/ld/stm32/mcu) to exist, which allows an eventual linker script cleanup to go much more smoothly. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Remove CS3-style initialization.Marti Bolivar2012-04-111-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove libcs3-related bits from support/ld. Break them out into libmaple proper and Wirish as appropriate: vector table definition and ISR declarations go into libmaple proper, and startup code goes into Wirish. Vector table symbols are included into common.inc from an STM32 family-specific directory under support/ld/stm32. This is a combination of 5 commits. Individual commit messages follow: libcs3_stm32_src: Don't depend on cs3.h. So we can use the existing toolchain. Move ISR decls/vector table into libmaple proper. This allows us to configure the vector table on a per-family basis. - Move support/ld/libcs3_stm32_src/stm32_isrs.S stm32_vector_table.S to libmaple/stm32f1/isrs_performance.S vector_table_performance.S, respectively. The directory libmaple/stm32f1/ is intended to hold all STM32F1-specific code within libmaple. Obviously, there's a lot of work to do before this becomes true. - support/ld/libcs3_stm32_src/Makefile: Don't try to compile stm32_isrs.S and stm32_vector_table.S anymore. - Add libmaple/stm32f1/rules.mk to include these new files in the standard libmaple build. - support/make/target-config.mk: Add LIBMAPLE_MODULE_FAMILY, which selects a directory to use as a family-specific libmaple submodule. - Makefile: Add LIBMAPLE_MODULE_FAMILY to LIBMAPLE_MODULES. Remove support/ld/libcs3_stm32_src and derived object files. From support/ld/libcs3_stm32_src, move start.S and start_c.c into Wirish. Modify wirish/rules.mk accordingly. Delete support/ld/libcs3_stm32_*_density.a. These are no longer necessary, as the relevant objects are included in the standard Wirish build. Remove the GROUP statements from the board linker scripts accordingly. Remove SEARCH_DIR(.) from common.inc; it's no longer necessary. Also fix up some comments that are now out of date. wirish/start_c.c: Don't use CS3-style memory initialization. Switch memory initialization to a simpler style of initializing .data if necessary, then zeroing .bss. Initializing .data is only necessary during Flash builds, since during RAM builds, LOADADDR(.data) == ADDR(.data). This makes libmaple completely incompatible with the CS3 startup sequence. Subsequent commits will clean up the namespace to reflect that fact. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Make vector table symbols family-specific during linking.Marti Bolivar2011-11-151-0/+8
| | | | | | | | | | | | | | | | | - support/make/target-config.mk: add LD_FAMILY_PATH, the directory to search for STM32 family-specific link configuration files. For now, this is just a stub which points to support/ld/stm32/f1/performance, since that's all we currently support. We can add the logic to support different STM32 families here later. - Makefile: Pass -L $(LD_FAMILY_PATH) to linker. - Rename support/ld/names.inc to support/ld/stm32/f1/performance/vector_symbols.inc. - common.inc: INCLUDE vector_symbols.inc instead of names.inc. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
* Add support for the Olimex STM32 H103 board.David Kiliani2011-09-271-0/+10
| | | | | | | | Pin layout and header files for the STM32 H103 prototype board from Olimex featuring an STM32F103RBT6 chip. This commit contains all necessary changes to compile with BOARD=olimex_stm32_h103. Signed-off-by: David Kiliani <mail@davidkiliani.de>
* [make] Factor out target/board configuration.Marti Bolivar2011-09-131-0/+56
Comment the Makefile more verbosely. It's been causing confusion on the forums. Add target-config.mk, this contains build configuration depending on the BOARD and MEMORY_TARGET variables. Its contents were cluttering up the Makefile and making it harder to read.
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