feat(gx12): add Ground Station AUX1 mode

radio/src/dataconstants.h

@@ -259,6 +259,7 @@ enum UartModes {
   UART_MODE_DEBUG,
   UART_MODE_SPACEMOUSE,
   UART_MODE_EXT_MODULE,
+  UART_MODE_GROUND_STATION,
   UART_MODE_COUNT SKIP,
   UART_MODE_MAX SKIP = UART_MODE_COUNT-1
 };

radio/src/groundstation.cpp

@@ -0,0 +1,77 @@
+#include "edgetx.h"
+#include "groundstation.h"
+#include "os/timer.h"
+#include "tasks/mixer_task.h"
+
+namespace {
+constexpr uint8_t kMagic0 = 'G';
+constexpr uint8_t kMagic1 = 'S';
+constexpr uint8_t kVersion = 1;
+constexpr uint8_t kTypeRCChannels = 1;
+constexpr uint8_t kChannels = 16;
+constexpr uint8_t kFrameSize = 10 + kChannels * 2 + 2;
+constexpr uint32_t kPeriodMs = 40; // 25 Hz
+
+const etx_serial_driver_t *driver = nullptr;
+void *driverCtx = nullptr;
+timer_handle_t timer = TIMER_INITIALIZER;
+uint16_t sequence = 0;
+
+uint16_t crc16(const uint8_t *data, size_t size)
+{
+  uint16_t crc = 0xffff;
+  for (size_t i = 0; i < size; ++i) {
+    crc ^= uint16_t(data[i]) << 8;
+    for (uint8_t bit = 0; bit < 8; ++bit)
+      crc = (crc & 0x8000) ? uint16_t((crc << 1) ^ 0x1021) : uint16_t(crc << 1);
+  }
+  return crc;
+}
+
+void sendRCFrame()
+{
+  if (!driver || !driver->sendByte || !mixerTaskRunning()) return;
+
+  uint8_t frame[kFrameSize] = { kMagic0, kMagic1, kVersion, kTypeRCChannels };
+  frame[4] = sequence & 0xff;
+  frame[5] = sequence >> 8;
+  const uint32_t timestamp = get_tmr10ms() * 10;
+  frame[6] = timestamp & 0xff;
+  frame[7] = (timestamp >> 8) & 0xff;
+  frame[8] = (timestamp >> 16) & 0xff;
+  frame[9] = (timestamp >> 24) & 0xff;
+
+  for (uint8_t i = 0; i < kChannels; ++i) {
+    const uint16_t value = channelOutputs[i];
+    frame[10 + i * 2] = value & 0xff;
+    frame[11 + i * 2] = value >> 8;
+  }
+
+  const uint16_t crc = crc16(frame, kFrameSize - 2);
+  frame[kFrameSize - 2] = crc & 0xff;
+  frame[kFrameSize - 1] = crc >> 8;
+  for (uint8_t byte : frame) driver->sendByte(driverCtx, byte);
+  ++sequence;
+}
+
+void timerCb(timer_handle_t *)
+{
+  // Drain input now so the future profile-control parser has a single owner.
+  // The baseline intentionally does not act on received bytes yet.
+  if (driver && driver->getByte) {
+    uint8_t ignored;
+    while (driver->getByte(driverCtx, &ignored)) {}
+  }
+  sendRCFrame();
+}
+} // namespace
+
+void groundstationSetSerialDriver(void *ctx, const etx_serial_driver_t *drv)
+{
+  driverCtx = ctx;
+  driver = drv;
+  sequence = 0;
+  if (!timer_is_created(&timer))
+    timer_create(&timer, timerCb, "gstation", kPeriodMs, true);
+  timer_start(&timer);
+}

radio/src/groundstation.h

@@ -0,0 +1,6 @@
+#pragma once
+
+#include <stdint.h>
+#include "hal/serial_port.h"
+
+void groundstationSetSerialDriver(void *ctx, const etx_serial_driver_t *drv);

radio/src/serial.cpp

@@ -37,6 +37,7 @@
 
 #if !defined(BOOT)
   #include "edgetx.h"
+  #include "groundstation.h"
   #include "lua/lua_api.h"
 #else
   #include "dataconstants.h"
@@ -257,6 +258,10 @@ static void serialSetCallBacks(int mode, void* ctx, const etx_serial_port_t* por
     break;
 #endif
 
+  case UART_MODE_GROUND_STATION:
+    groundstationSetSerialDriver(ctx, drv);
+    break;
+
 #if defined(CONFIGURABLE_MODULE_PORT) and !defined(BOOT)
   case UART_MODE_EXT_MODULE:
     if (port && !ctx) { // de-init
@@ -354,6 +359,11 @@ static void serialSetupPort(int mode, etx_serial_init& params)
     break;
 #endif
 
+  case UART_MODE_GROUND_STATION:
+    params.baudrate = 115200;
+    params.direction = ETX_Dir_TX_RX;
+    break;
+
 #endif // BOOT
   }
 }

radio/src/targets/taranis/CMakeLists.txt

@@ -267,6 +267,7 @@ elseif(PCB STREQUAL X7)
     set(PXX2 ON)
     set(ENABLE_SERIAL_PASSTHROUGH ON CACHE BOOL "Enable serial passthrough")
     set(FLYSKY_GIMBAL YES)
+    set(SRC ${SRC} groundstation.cpp)
     if (NOT BLUETOOTH)
       set(AUX_SERIAL ON)
     endif()

radio/src/translations/i18n/en.h

@@ -144,6 +144,7 @@
 #define TR_AUX_SERIAL_MODES_9          "Debug"
 #define TR_AUX_SERIAL_MODES_10         "SpaceMouse"
 #define TR_AUX_SERIAL_MODES_11         "External module"
+#define TR_AUX_SERIAL_MODES_12         "Ground Station"
 #define TR_SWTYPES_1                   "None"
 #define TR_SWTYPES_2                   "Toggle"
 #define TR_SWTYPES_3                   "2POS"

radio/src/translations/i18n/pl.h

@@ -145,6 +145,7 @@
 #define TR_AUX_SERIAL_MODES_9  "Debug"
 #define TR_AUX_SERIAL_MODES_10 "SpaceMouse"
 #define TR_AUX_SERIAL_MODES_11 "Moduł zewnętrzny"
+#define TR_AUX_SERIAL_MODES_12 "Ground Station"
 #define TR_SWTYPES_1           "Brak"
 #define TR_SWTYPES_2           "Chwil."
 #define TR_SWTYPES_3           "2POZ"