65 lines
1.8 KiB
Python
65 lines
1.8 KiB
Python
#!/usr/bin/env python3
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"""Generate ESC/POS ticker tape output from trade CSV data.
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Reads a CSV of trades (timestamp, symbol, lots, price) and generates
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ESC/POS commands with 90° rotated text to emulate an old stock ticker tape.
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Each character gets its own printed row. When the receipt paper is turned
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sideways, symbol characters read across the top and price characters read
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across the bottom — just like a real ticker tape.
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"""
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import csv
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import sys
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from escpos.printer import Dummy
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# TM-T88V: 42 columns at Font A on 80mm paper
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LINE_WIDTH = 42
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def print_trade(p, symbol, lots, price):
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"""Print a single trade as ticker tape characters, one per row."""
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if lots > 1:
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price_str = f"{lots}s{price:.2f}"
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else:
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price_str = f"{price:.2f}"
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# Symbol characters at the top (right-aligned)
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for ch in symbol:
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p.text(" " * (LINE_WIDTH - 1) + ch + "\n")
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# Price characters at the bottom (left-aligned)
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for ch in price_str:
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p.text(ch + "\n")
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# Blank line separator between trades
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p.text("\n")
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def main():
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csv_file = sys.argv[1] if len(sys.argv) > 1 else "trades_sample_sorted.csv"
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output_file = sys.argv[2] if len(sys.argv) > 2 else "ticker_tape.bin"
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p = Dummy(profile="TM-T88V")
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p.hw("INIT")
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# ESC V 1: 90° clockwise character rotation (not exposed by python-escpos)
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p._raw(b"\x1b\x56\x01")
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with open(csv_file) as f:
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reader = csv.reader(f)
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for row in reader:
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_timestamp, symbol, lots_str, price_str = row
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lots = int(lots_str)
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price = float(price_str)
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print_trade(p, symbol, lots, price)
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p.cut()
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with open(output_file, "wb") as f:
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f.write(p.output)
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print(f"Wrote {len(p.output)} bytes to {output_file}", file=sys.stderr)
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if __name__ == "__main__":
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main()
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