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support bootloader update with CAN bootloader
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| #!/usr/bin/env python3 | ||
| ''' | ||
| set application signature in bin and elf files | ||
| ''' | ||
|
|
||
| import struct | ||
| import sys | ||
|
|
||
| APP_SIGNATURE_MAGIC1 = 0x68f058e6 | ||
| APP_SIGNATURE_MAGIC2 = 0xafcee5a0 | ||
|
|
||
| def crc32(buf): | ||
| '''crc32 implementation''' | ||
| crc = 0 | ||
| size = len(buf) | ||
| for i in range(size): | ||
| byte = buf[i] | ||
| crc ^= byte | ||
| for _ in range(8): | ||
| mask = -(crc & 1) | ||
| crc >>= 1 | ||
| crc ^= (0xEDB88320 & mask) | ||
| return crc | ||
|
|
||
| # Example usage: | ||
| # buf = bytearray([0x31, 0x32, 0x33, 0x34]) # Sample input | ||
| # result = crc32(buf, len(buf)) | ||
| # print(f"CRC32: {hex(result)}") | ||
|
|
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| def set_app_descriptor(bin_file, elf_file): | ||
| '''setup app descriptor in bin file and elf file''' | ||
| descriptor = struct.pack("<II", APP_SIGNATURE_MAGIC1, APP_SIGNATURE_MAGIC2); | ||
| img = open(bin_file, 'rb').read() | ||
| len1 = len(img) | ||
| offset = img.find(descriptor) | ||
| if offset == -1: | ||
| print("No APP_DESCRIPTOR found in %s" % bin_file) | ||
| sys.exit(1) | ||
|
|
||
| # full descriptor length | ||
| desc_len = 44 | ||
|
|
||
| img1 = bytearray(img[:offset]) | ||
| img2 = bytearray(img[offset+desc_len:]) | ||
| crc1 = crc32(img1) | ||
| crc2 = crc32(img2) | ||
|
|
||
| desc = struct.pack('<III', len(img), crc1, crc2) | ||
| img = img[:offset+len(descriptor)] + desc + img[offset+len(descriptor)+len(desc):] | ||
| if len(img) != len1: | ||
| print("Bad app descriptor size", len1, len(img)) | ||
| sys.exit(1) | ||
| open(bin_file, 'wb').write(img) | ||
|
|
||
| elf_img = open(elf_file,'rb').read() | ||
| elf_ofs = elf_img.find(descriptor) | ||
| if elf_ofs == -1: | ||
| print("No APP_DESCRIPTOR found in elf file") | ||
| sys.exit(1) | ||
| elf_ofs += len(descriptor) | ||
| elf_img = elf_img[:elf_ofs] + desc + elf_img[elf_ofs+len(desc):] | ||
| open(elf_file, 'wb').write(elf_img) | ||
| print("Applied APP_DESCRIPTOR %08x%08x for %s" % (crc1, crc2, bin_file)) | ||
|
|
||
| from argparse import ArgumentParser | ||
| parser = ArgumentParser(description="AM32 set application signature") | ||
|
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| parser.add_argument("binfile", type=str, help="application bin file") | ||
| parser.add_argument("elffile", type=str, help="application elf file") | ||
|
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| args = parser.parse_args() | ||
|
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| # only apply to CAN firmwares for now | ||
| if args.binfile.find("_CAN_") == -1: | ||
| sys.exit(0) | ||
|
|
||
| if not args.binfile.endswith(".bin"): | ||
| print("Invalid bin file %s" % args.binfile) | ||
| sys.exit(1) | ||
|
|
||
| if not args.elffile.endswith(".elf"): | ||
| print("Invalid elf file %s" % args.elffile) | ||
| sys.exit(1) | ||
|
|
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| set_app_descriptor(args.binfile, args.elffile) |