41 lines
1.3 KiB
Python
41 lines
1.3 KiB
Python
#!/usr/bin/env python3
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# This curious script dumps all model info from STC-ISP.
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# Data is directly read from the binary.
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# Offsets are for STC-ISP 6.63, md5sum 62d465a196de26fa3fb4b22c7be4b882.
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MCU_TABLE_OFFSET = 0x0004e270
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MCU_TABLE_SIZE = 648
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MCU_RECORD_SIZE = 32
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MCU_NAMES_OFFSET = 0x00062dc8
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MCU_NAMES_PTR_OFFSET = 0x00462dc8
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import struct
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import sys
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inp = open(sys.argv[1], "rb")
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for i in range(MCU_TABLE_SIZE):
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mcu_record_offset = MCU_TABLE_OFFSET + MCU_RECORD_SIZE * i
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inp.seek(mcu_record_offset)
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mcu_record = inp.read(MCU_RECORD_SIZE)
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flags, name_ptr, mcu_id, code_size, ee_size, _, total_size, _ = struct.unpack("<8I", mcu_record)
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mcu_id &= 0xffff
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mcu_name_offset = MCU_NAMES_OFFSET + (name_ptr - MCU_NAMES_PTR_OFFSET)
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inp.seek(mcu_name_offset)
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name_str = inp.read(16).split(b'\00')[0].decode("ascii")
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# XXX: 1 KB are reserved one *some* MCUs for some reason
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#if ee_size > 0 and not name_str.startswith("IAP"):
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# ee_size -= 1024
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# STC12C54xx always have 12 KB eeprom
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if name_str.startswith("STC12C54"):
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ee_size = 12 * 1024
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print("MCUModel(name='%s', magic=0x%02x%02x, total=%d, code=%d, eeprom=%d)," %
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(name_str, mcu_id >> 8, mcu_id & 0xff, total_size, code_size, ee_size))
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inp.close()
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