MarlinFirmware/buildroot/share/PlatformIO/scripts/openblt.py

#
# Convert the ELF to an SREC file suitable for some bootloaders
#
import os,sys
from os.path import join

Import("env")

board = env.BoardConfig()
board_keys = board.get("build").keys()
if 'encrypt' in board_keys:
	env.AddPostAction(
		join("$BUILD_DIR", "${PROGNAME}.bin"),
		env.VerboseAction(" ".join([
			"$OBJCOPY", "-O", "srec",
			"\"$BUILD_DIR/${PROGNAME}.elf\"", "\"" + join("$BUILD_DIR", board.get("build.encrypt")) + "\""
		]), "Building $TARGET")
	)