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#
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# stm32_bootloader.py
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#
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# - If 'build.offset' is provided, either by JSON or by the environment...
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# - Set linker flag LD_FLASH_OFFSET and relocate the VTAB based on 'build.offset'.
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# - Set linker flag LD_MAX_DATA_SIZE based on 'build.maximum_ram_size'.
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# - Define STM32_FLASH_SIZE from 'upload.maximum_size' for use by Flash-based EEPROM emulation.
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#
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# - For 'board_build.rename' add a post-action to rename the firmware file.
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#
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import os,sys,marlin
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Import("env")
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from SCons.Script import DefaultEnvironment
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board = DefaultEnvironment().BoardConfig()
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board_keys = board.get("build").keys()
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#
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# For build.offset define LD_FLASH_OFFSET, used by ldscript.ld
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#
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if 'offset' in board_keys:
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LD_FLASH_OFFSET = board.get("build.offset")
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marlin.relocate_vtab(LD_FLASH_OFFSET)
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# Flash size
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maximum_flash_size = int(board.get("upload.maximum_size") / 1024)
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marlin.replace_define('STM32_FLASH_SIZE', maximum_flash_size)
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# Get upload.maximum_ram_size (defined by /buildroot/share/PlatformIO/boards/VARIOUS.json)
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maximum_ram_size = board.get("upload.maximum_ram_size")
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for i, flag in enumerate(env["LINKFLAGS"]):
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if "-Wl,--defsym=LD_FLASH_OFFSET" in flag:
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env["LINKFLAGS"][i] = "-Wl,--defsym=LD_FLASH_OFFSET=" + LD_FLASH_OFFSET
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if "-Wl,--defsym=LD_MAX_DATA_SIZE" in flag:
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env["LINKFLAGS"][i] = "-Wl,--defsym=LD_MAX_DATA_SIZE=" + str(maximum_ram_size - 40)
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#
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# For build.rename simply rename the firmware file.
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#
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if 'rename' in board_keys:
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def rename_target(source, target, env):
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firmware = os.path.join(target[0].dir.path, board.get("build.rename"))
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import shutil
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shutil.copy(target[0].path, firmware)
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marlin.add_post_action(rename_target)
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