From 04d965d67a7264a1c7c211494aebda1953df7603 Mon Sep 17 00:00:00 2001
From: "info@mode42.com" <info@mode42.com>
Date: Fri, 7 Aug 2026 18:25:13 +0000
Subject: Initial push

---
 stacks/tncs/tnc2c-send-test.sh | 100 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100755 stacks/tncs/tnc2c-send-test.sh

(limited to 'stacks/tncs/tnc2c-send-test.sh')

diff --git a/stacks/tncs/tnc2c-send-test.sh b/stacks/tncs/tnc2c-send-test.sh
new file mode 100755
index 0000000..4ac1b52
--- /dev/null
+++ b/stacks/tncs/tnc2c-send-test.sh
@@ -0,0 +1,100 @@
+#!/bin/bash
+# Send one AX.25 UI frame via KISS on TNC2C - keys PTT / transmits on radio.
+# Requires: antenna or dummyload, VOX off, HyBBX stopped.
+# Usage: ./tnc2c-send-test.sh [message] [src] [dst]
+
+set -euo pipefail
+
+MSG="${1:-HI}"
+SRC="${2:-TEST-0}"
+DST="${3:-CQ}"
+
+ROOT="$(cd "$(dirname "$0")" && pwd)"
+# shellcheck source=/dev/null
+[[ -f "$ROOT/tnc2c-serial.env" ]] && source "$ROOT/tnc2c-serial.env"
+
+if pgrep -x hybbx >/dev/null 2>&1; then
+    echo "ERROR: hybbx is running - stop it first" >&2
+    exit 1
+fi
+
+export TNC2C_DEV TNC2C_LINE
+python3 - "$MSG" "$SRC" "$DST" <<'PY'
+import fcntl, os, struct, sys, time, termios
+
+msg, src, dst = sys.argv[1:4]
+dev = os.environ.get("TNC2C_DEV", "/dev/ttyS4")
+line = os.environ.get("TNC2C_LINE", "8n1").lower()
+seven_e1 = line.startswith("7e")
+
+def kiss_escape(data: bytes) -> bytes:
+    out = bytearray()
+    for b in data:
+        if b == 0xC0:
+            out.extend((0xDB, 0xDC))
+        elif b == 0xDB:
+            out.extend((0xDB, 0xDD))
+        else:
+            out.append(b)
+    return bytes(out)
+
+def ax25_addr(call: str, ssid: int, last: bool) -> bytes:
+    call = call.upper().ljust(6)[:6]
+    raw = bytes((ord(c) << 1) for c in call)
+    ssid_b = ((ssid & 0x0F) << 1) | (0x01 if last else 0x00)
+    return raw + bytes([ssid_b])
+
+def ax25_crc(data: bytes) -> int:
+    crc = 0xFFFF
+    for b in data:
+        crc ^= b
+        for _ in range(8):
+            crc = (crc >> 1) ^ 0x8408 if crc & 1 else crc >> 1
+    return crc ^ 0xFFFF
+
+def ax25_ui(src, dst, info: bytes) -> bytes:
+    body = ax25_addr(dst, 0, False) + ax25_addr(src, 0, True)
+    body += b"\x03\xF0" + info
+    crc = ax25_crc(body)
+    return body + bytes((crc & 0xFF, crc >> 8))
+
+def kiss_frame(port: int, payload: bytes) -> bytes:
+    return b"\xC0" + bytes([port & 0x0F]) + kiss_escape(payload) + b"\xC0"
+
+print(f"Serial: {dev} 19200 {line}")
+
+fd = os.open(dev, os.O_RDWR | os.O_NOCTTY)
+t = termios.tcgetattr(fd)
+t[0] = t[1] = 0
+t[2] = termios.CLOCAL | termios.CREAD | (termios.CS7 if seven_e1 else termios.CS8)
+if seven_e1:
+    t[2] |= termios.PARENB
+t[3] = t[4] = t[5] = termios.B19200
+t[6][termios.VMIN] = 0
+t[6][termios.VTIME] = 5
+termios.tcsetattr(fd, termios.TCSANOW, t)
+termios.tcflush(fd, termios.TCIOFLUSH)
+flags = struct.unpack("I", fcntl.ioctl(fd, 0x5415, struct.pack("I", 0)))[0] | 0x006
+fcntl.ioctl(fd, 0x5416, struct.pack("I", flags))
+
+for cmd in (b"kiss off\r", b"kiss on\r"):
+    os.write(fd, cmd)
+    termios.tcdrain(fd)
+    time.sleep(0.5)
+
+pkt = kiss_frame(0, ax25_ui(src, dst, msg.encode("ascii", errors="replace")))
+print(f"TX {src} -> {dst}: {msg!r} ({len(pkt)} bytes KISS)")
+os.write(fd, pkt)
+termios.tcdrain(fd)
+time.sleep(3.0)
+try:
+    rx = os.read(fd, 4096)
+    if rx:
+        print(f"RX {len(rx)} bytes: {rx[:80]!r}")
+except BlockingIOError:
+    pass
+os.write(fd, b"kiss off\r")
+termios.tcdrain(fd)
+os.close(fd)
+print("Check LED 2 (PTT) on TNC and S-meter on radio.")
+PY
-- 
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