59 lines
2.2 KiB
Python
59 lines
2.2 KiB
Python
import struct
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filepath = "/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin"
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try:
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with open(filepath, "rb") as f:
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stream = f.read()
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except Exception as e:
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print(f"Error: {e}")
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import sys
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sys.exit(1)
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packets_288 = []
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packets_989 = []
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i = 0
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while i < len(stream) - 4:
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b0, b1, b2, b3 = stream[i], stream[i+1], stream[i+2], stream[i+3]
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if b3 == 0x46:
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pkt_len = b0 | (b1 << 8)
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if pkt_len == 288 and i + pkt_len <= len(stream):
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packets_288.append(stream[i:i + pkt_len])
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elif pkt_len == 989 and i + pkt_len <= len(stream):
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packets_989.append(stream[i:i + pkt_len])
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i += max(pkt_len, 4)
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else:
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i += 1
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print(f"Loaded {len(packets_288)} 288-byte packets and {len(packets_989)} 989-byte packets.")
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# Search all offsets in 288-byte packets for any u16 LE value between 70 and 95
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print("\nScanning 288-byte packets for u16 LE values in range [75, 95] across all packets:")
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found_offsets_288 = {}
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for idx, pkt in enumerate(packets_288):
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for off in range(4, len(pkt) - 1, 2):
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val = struct.unpack_from('<H', pkt, off)[0]
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if 75 <= val <= 95:
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found_offsets_288.setdefault(off, []).append((idx, val))
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for off, matches in found_offsets_288.items():
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if len(matches) > 5:
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# print first few matches and total count
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vals = [m[1] for m in matches]
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print(f" Offset {off}: found {len(matches)} times. Values: {set(vals)}")
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# Search all offsets in 989-byte packets for any u16 LE value between 70 and 95
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print("\nScanning 989-byte packets for u16 LE values in range [75, 95] across all packets:")
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found_offsets_989 = {}
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for idx, pkt in enumerate(packets_989):
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# ECG packets are mostly waveform data in the first 900 bytes, so let's check from 900 to 988
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for off in range(900, len(pkt) - 1, 2):
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val = struct.unpack_from('<H', pkt, off)[0]
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if 75 <= val <= 95:
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found_offsets_989.setdefault(off, []).append((idx, val))
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for off, matches in found_offsets_989.items():
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if len(matches) > 5:
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vals = [m[1] for m in matches]
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print(f" Offset {off}: found {len(matches)} times. Values: {set(vals)}")
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