2021-02-28 04:38:57 +00:00
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#
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# lerdge.py
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# Customizations for Lerdge build environments
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#
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2020-07-06 22:08:52 +00:00
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import os,sys
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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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custom_ld_script = os.path.abspath("buildroot/share/PlatformIO/ldscripts/lerdge.ld")
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for i, flag in enumerate(env["LINKFLAGS"]):
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if "-Wl,-T" in flag:
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env["LINKFLAGS"][i] = "-Wl,-T" + custom_ld_script
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elif flag == "-T":
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env["LINKFLAGS"][i + 1] = custom_ld_script
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def encryptByte(byte):
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byte = 0xFF & ((byte << 6) | (byte >> 2))
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i = 0x58 + byte
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j = 0x05 + byte + (i >> 8)
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byte = (0xF8 & i) | (0x07 & j)
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return byte
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def encrypt_file(input, output_file, file_length):
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input_file = bytearray(input.read())
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for i in range(len(input_file)):
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result = encryptByte(input_file[i])
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input_file[i] = result
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output_file.write(input_file)
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return
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# Encrypt ${PROGNAME}.bin and save it as build.firmware
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def encrypt(source, target, env):
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print("Encrypting to:", board.get("build.firmware"))
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firmware = open(target[0].path, "rb")
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result = open(target[0].dir.path + "/" + board.get("build.firmware"), "wb")
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length = os.path.getsize(target[0].path)
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encrypt_file(firmware, result, length)
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firmware.close()
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result.close()
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if 'firmware' in board.get("build").keys():
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env.AddPostAction("$BUILD_DIR/${PROGNAME}.bin", encrypt);
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else:
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print("You need to define output file via board_build.firmware = 'filename' parameter")
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exit(1);
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