DMR-данные (SMS) на TYT MD-UV380 под OpenGD77

Восстановлено из транскрипта сессии после потери рабочего дерева на сервере сборки.

Что внутри:
- четыре новых модуля прошивки (приём, сборка исходящего, меню Messages);
- правки существующих файлов в виде скриптов, с порядком применения;
- инструменты стенда: снятие экрана рации по USB, дамп кадров, эталонная сборка пакета;
- NOTES.md: что проверено в эфире, что не доделано, где грабли.

Работало в эфире в августе 2026: данные ходят в обе стороны в режиме хотспота,
рация принимает SMS и показывает на экране. Отправка собрана и сверена с эталоном
сервера побайтово, но в эфире не проверялась.

Claude-Session: https://claude.ai/code/session_01GJtvG5WwqYNe1b7s9LLtgy

patches/patch_txclean.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+"""Stop emitting voice LC headers in front of a packet data transmission.
+
+TX_START_1/3/5 always sent three Voice LC Headers built from the radio's own DMR ID,
+which is correct for a voice call but pollutes the air before an SMS: the receiving
+end logs them as "RF user <id> rejected for using TG 0". When the queued frame is a
+data burst we send standard Idle data bursts instead - a legitimate filler that
+receivers discard silently.
+"""
+W = "/home/viktor/ogd77rel/uv_src/OpenGD77_MDUV380_DM1701_20260130/MDUV380_firmware/application"
+p = W + "/source/hardware/HR-C6000.c"
+s = open(p).read()
+
+if "DT_IDLE << 4" in s:
+    print("already patched")
+    raise SystemExit(0)
+
+# The three start steps share the same two lines; patch each occurrence.
+old_variants = [
+    # TX_START_1 (preceded by the LED write and header call)
+    ("""			hrc6000SendPcOrTgLCHeader();
+			SPI0WritePageRegByte(0x04, 0x41, 0x80);    // Transmit during next Timeslot
+			SPI0WritePageRegByte(0x04, 0x50, 0x10);    // Set Data Type to 0001 (Voice LC Header), Data, LCSS=00
+""",
+     """			if (hrc.txDataType != HOTSPOT_TX_TYPE_VOICE)
+			{
+				// A data burst is queued: don't announce a voice call in front of it.
+				SPI0WritePageRegByte(0x04, 0x41, 0x80);                 // Transmit during next Timeslot
+				SPI0WritePageRegByte(0x04, 0x50, (DT_IDLE << 4));       // Idle data burst as filler
+			}
+			else
+			{
+				hrc6000SendPcOrTgLCHeader();
+				SPI0WritePageRegByte(0x04, 0x41, 0x80);    // Transmit during next Timeslot
+				SPI0WritePageRegByte(0x04, 0x50, 0x10);    // Set Data Type to 0001 (Voice LC Header), Data, LCSS=00
+			}
+"""),
+    # TX_START_3 and TX_START_5 (no header call, just the two register writes)
+    ("""			SPI0WritePageRegByte(0x04, 0x41, 0x80);     // Transmit during Next Timeslot
+			SPI0WritePageRegByte(0x04, 0x50, 0x10);     // Set Data Type to 0001 (Voice LC Header), Data, LCSS=00
+""",
+     """			SPI0WritePageRegByte(0x04, 0x41, 0x80);     // Transmit during Next Timeslot
+			SPI0WritePageRegByte(0x04, 0x50, ((hrc.txDataType != HOTSPOT_TX_TYPE_VOICE) ? (DT_IDLE << 4) : 0x10));// Voice LC Header, or Idle filler ahead of data
+"""),
+    ("""			SPI0WritePageRegByte(0x04, 0x41, 0x80);     // Transmit during next Timeslot
+			SPI0WritePageRegByte(0x04, 0x50, 0x10);     // Set Data Type to 0001 (Voice LC Header), Data, LCSS=00
+""",
+     """			SPI0WritePageRegByte(0x04, 0x41, 0x80);     // Transmit during next Timeslot
+			SPI0WritePageRegByte(0x04, 0x50, ((hrc.txDataType != HOTSPOT_TX_TYPE_VOICE) ? (DT_IDLE << 4) : 0x10));// Voice LC Header, or Idle filler ahead of data
+"""),
+]
+
+count = 0
+for old, new in old_variants:
+    if old in s:
+        s = s.replace(old, new, 1)
+        count += 1
+
+if count == 0:
+    raise SystemExit("no TX_START patterns matched - aborting")
+
+open(p, "w").write(s)
+print("patched %d of 3 TX start steps" % count)