41 lines
1.4 KiB
Python
41 lines
1.4 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-15xx-v6.85K.exe, sha1sum aa66e4c1ab49de27369b83c954a7c202acce0950
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MCU_TABLE_OFFSET = 0x00064550
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MCU_TABLE_SIZE = 941
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MCU_RECORD_SIZE = 32
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MCU_NAMES_OFFSET = 0x0007e80c
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MCU_NAMES_PTR_OFFSET = 0x0047e80c
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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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# TODO: With some MCUs, the amount of available EEPROM depends on the BSL version.
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# Generally, newer BSLs free up a KB of additional EEPROM. Currently, always the
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# maximum amount (with newer BSL) is reported.
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# STC12x54xx always have 12 KB eeprom
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if name_str.startswith("STC12C54") or name_str.startswith("STC12LE54"):
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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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