intelhex

from intelhex import IntelHex

import tempfile import os from intelhex import IntelHex # Create a dummy HEX file content hex_content = """ :10010000214601360121470136007E012321460119FF :100110002146017E17C20001FF50013001360120202F :00000001FF """.strip() # Use a temporary file for demonstration with tempfile.TemporaryDirectory() as tmpdir: hex_filepath = os.path.join(tmpdir, "example.hex") with open(hex_filepath, "w") as f: f.write(hex_content) print(f"Created dummy hex file at: {hex_filepath}") # Load the Intel HEX file ih = IntelHex() ih.loadhex(hex_filepath) print(f"Loaded hex file with {len(ih.segments())} segments.") # Read a byte at a specific address address_to_read = 0x100 byte_value = ih[address_to_read] print(f"Byte at {hex(address_to_read)}: {hex(byte_value)}") # Modify a byte ih[0x100] = 0xAA print(f"Modified byte at {hex(address_to_read)} to: {hex(ih[address_to_read])}") # Write the modified data to a new HEX file output_hex_filepath = os.path.join(tmpdir, "modified.hex") # Using eolstyle='LF' explicitly (see warnings) ih.write_hex_file(output_hex_filepath, byte_count=16, eolstyle='LF') print(f"Modified hex file written to: {output_hex_filepath}") # Basic verification with open(output_hex_filepath, "r") as f: modified_content = f.read() if ":10010000AA4601360121470136007E012321460127" in modified_content: print("Verification successful: Modified byte found in output.") else: print("Verification failed.")