Roflin
394b677c8f
Reverts the 0x8000/0xC000 change from162dbf7, which was WRONG and actively broke transmission. The W5100S datasheet pseudo-code quotes 0x8000 (TX) / 0xC000 (RX) for the memory blocks, but the PARALLEL/indirect (IDM) interface only decodes a 15-bit offset. Bench-proven with an address-aliasing probe: writing distinct values to each candidate base and reading them back showed 0xC000 and 0x4000 are the SAME cell (0xC000 & 0x7FFF == 0x4000) while 0x6000 holds its own value. Consequence of the bad base: every payload byte written to 0x9800+i aliased down onto 0x0000+i, landing on SHAR (0x09-0x0E) and SIPR (0x0F-0x12) and overwriting them with the payload. The chip then transmitted frames with a garbage source MAC/IP, which the peer NIC drops without counting -- the "SEND_OK but rx_packets=0" symptom, and the bogus SIPR0 readback (0x50 was literally payload byte 15, 'P'). The NETLCKR unlock from9c4bc7ais a genuine W5100S requirement and stays. Also: - w5100_udptest.py: self-contained configure+send+readback probe (and the address-aliasing probe that found this), reports over UART. - scripts/build-flash.sh: sweep N seeds and flash the best (capture timing is seed-dependent, so the sweep is mandatory). - scripts/uart-console.py: interactive UART console, plus --send/--read one-shot modes for scripting. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
103 lines
3.8 KiB
Python
Executable File
103 lines
3.8 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Interactive UART console to the re-bba-rb board (FT2232H channel B).
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The BBA default build runs an interactive shell on this port ("rebbarb> "):
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help list commands
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udp broadcast [msg] send a UDP broadcast on the test socket
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udp unicast <ip> [msg] send a UDP datagram to <ip>
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The bring-up diagnostics (w5100_selftest / w5100_udptest / w5100_regdump) just
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stream a status line on the same port, so this works for those too.
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Usage:
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sudo ./scripts/uart-console.py # /dev/ttyUSB1 @ 115200
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sudo ./scripts/uart-console.py /dev/ttyUSB0 115200
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./scripts/uart-console.py --send "udp broadcast hi" # one-shot, no tty
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./scripts/uart-console.py --read 5 # just dump 5s of output
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Channel A of the FT2232H is the MPSSE/iceprog port; the UART is channel B, which
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is normally the SECOND ttyUSB (…USB1). Needs read/write on the device node —
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run under sudo, or add yourself to the port's group.
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Quit the interactive console with Ctrl-] (or Ctrl-C).
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"""
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import sys, time, argparse
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try:
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import serial
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except ImportError:
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sys.exit("needs pyserial: pip install pyserial")
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def main():
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ap = argparse.ArgumentParser(add_help=True)
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ap.add_argument("port", nargs="?", default="/dev/ttyUSB1")
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ap.add_argument("baud", nargs="?", type=int, default=115200)
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ap.add_argument("--send", metavar="CMD",
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help="send one command, print the reply, exit")
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ap.add_argument("--read", metavar="SECONDS", type=float,
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help="just read for N seconds and exit (no tty needed)")
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args = ap.parse_args()
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try:
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ser = serial.Serial(args.port, args.baud, timeout=0.1)
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except serial.SerialException as e:
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sys.exit(f"cannot open {args.port}: {e}\n(try: sudo {' '.join(sys.argv)})")
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# ── one-shot modes (safe in scripts / no controlling terminal) ───────────
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if args.read is not None:
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end = time.time() + args.read
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while time.time() < end:
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data = ser.read(256)
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if data:
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sys.stdout.write(data.decode("ascii", "replace"))
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sys.stdout.flush()
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return
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if args.send is not None:
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time.sleep(0.2); ser.reset_input_buffer()
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ser.write(args.send.encode() + b"\r")
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end = time.time() + 2.0
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buf = b""
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while time.time() < end:
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buf += ser.read(256)
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sys.stdout.write(buf.decode("ascii", "replace"))
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return
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# ── interactive console ─────────────────────────────────────────────────
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import termios, tty, select
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print(f"[uart-console] {args.port} @ {args.baud} 8N1 — Ctrl-] to quit\r")
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fd = sys.stdin.fileno()
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try:
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old = termios.tcgetattr(fd)
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except termios.error:
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old = None
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try:
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if old is not None:
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tty.setraw(fd)
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while True:
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r, _, _ = select.select([sys.stdin, ser], [], [], 0.05)
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if ser in r:
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data = ser.read(4096)
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if data:
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sys.stdout.write(data.decode("ascii", "replace"))
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sys.stdout.flush()
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if sys.stdin in r:
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ch = sys.stdin.buffer.read(1)
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if not ch or ch == b"\x1d": # Ctrl-]
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break
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if ch == b"\n": # send CR, the shell wants it
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ch = b"\r"
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ser.write(ch)
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except KeyboardInterrupt:
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pass
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finally:
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if old is not None:
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termios.tcsetattr(fd, termios.TCSADRAIN, old)
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ser.close()
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print("\r\n[uart-console] closed")
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if __name__ == "__main__":
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main()
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