Copter: add support for `AVAILABLE_MODES` msg

ArduCopter/GCS_Mavlink.cpp

@@ -589,7 +589,8 @@ static const ap_message STREAM_EXTRA3_msgs[] = {
 #endif
 };
 static const ap_message STREAM_PARAMS_msgs[] = {
-    MSG_NEXT_PARAM
+    MSG_NEXT_PARAM,
+    MSG_AVAILABLE_MODES
 };
 static const ap_message STREAM_ADSB_msgs[] = {
     MSG_ADSB_VEHICLE,
@@ -1663,3 +1664,120 @@ uint8_t GCS_MAVLINK_Copter::high_latency_wind_direction() const
     return 0;
 }
 #endif // HAL_HIGH_LATENCY2_ENABLED
+
+// Send the mode with the given index (not mode number!) return the total number of modes
+// Index starts at 1
+uint8_t GCS_MAVLINK_Copter::send_available_mode(uint8_t index) const
+{
+    const Mode* modes[] {
+#if MODE_AUTO_ENABLED
+        &copter.mode_auto, // This auto is actually auto RTL!
+        &copter.mode_auto, // This one is really is auto!
+#endif
+#if MODE_ACRO_ENABLED
+        &copter.mode_acro,
+#endif
+        &copter.mode_stabilize,
+        &copter.mode_althold,
+#if MODE_CIRCLE_ENABLED
+        &copter.mode_circle,
+#endif
+#if MODE_LOITER_ENABLED
+        &copter.mode_loiter,
+#endif
+#if MODE_GUIDED_ENABLED
+        &copter.mode_guided,
+#endif
+        &copter.mode_land,
+#if MODE_RTL_ENABLED
+        &copter.mode_rtl,
+#endif
+#if MODE_DRIFT_ENABLED
+        &copter.mode_drift,
+#endif
+#if MODE_SPORT_ENABLED
+        &copter.mode_sport,
+#endif
+#if MODE_FLIP_ENABLED
+        &copter.mode_flip,
+#endif
+#if AUTOTUNE_ENABLED
+        &copter.mode_autotune,
+#endif
+#if MODE_POSHOLD_ENABLED
+        &copter.mode_poshold,
+#endif
+#if MODE_BRAKE_ENABLED
+        &copter.mode_brake,
+#endif
+#if MODE_THROW_ENABLED
+        &copter.mode_throw,
+#endif
+#if HAL_ADSB_ENABLED
+        &copter.mode_avoid_adsb,
+#endif
+#if MODE_GUIDED_NOGPS_ENABLED
+        &copter.mode_guided_nogps,
+#endif
+#if MODE_SMARTRTL_ENABLED
+        &copter.mode_smartrtl,
+#endif
+#if MODE_FLOWHOLD_ENABLED
+        (Mode*)copter.g2.mode_flowhold_ptr,
+#endif
+#if MODE_FOLLOW_ENABLED
+        &copter.mode_follow,
+#endif
+#if MODE_ZIGZAG_ENABLED
+        &copter.mode_zigzag,
+#endif
+#if MODE_SYSTEMID_ENABLED
+        (Mode *)copter.g2.mode_systemid_ptr,
+#endif
+#if MODE_AUTOROTATE_ENABLED
+        &copter.mode_autorotate,
+#endif
+#if MODE_TURTLE_ENABLED
+        &copter.mode_turtle,
+#endif
+    };
+
+    const uint8_t mode_count = ARRAY_SIZE(modes);
+
+    // Convert to zero indexed
+    const uint8_t index_zero = index - 1;
+    if (index_zero >= mode_count) {
+        // Mode does not exist!?
+        return mode_count;
+    }
+
+    // Ask the mode for its name and number
+    const char* name = modes[index_zero]->name();
+    uint8_t mode_number = (uint8_t)modes[index_zero]->mode_number();
+
+#if MODE_AUTO_ENABLED
+    // Auto RTL is odd
+    // Have to deal with is separately becase its number and name can change depending on if were in it or not
+    if (index_zero == 0) {
+        mode_number = (uint8_t)Mode::Number::AUTO_RTL;
+        name = "AUTO RTL";
+
+    } else if (index_zero == 1) {
+        mode_number = (uint8_t)Mode::Number::AUTO;
+        name = "AUTO";
+
+    }
+#endif
+
+    mavlink_msg_available_modes_send(
+        chan,
+        mode_count,
+        index,
+        MAV_STANDARD_MODE::MAV_STANDARD_MODE_NON_STANDARD,
+        mode_number,
+        0, // MAV_MODE_PROPERTY bitmask
+        name
+    );
+
+    return mode_count;
+}

ArduCopter/GCS_Mavlink.h

@@ -64,6 +64,10 @@ protected:
     uint32_t log_radio_bit() const override { return MASK_LOG_PM; }
 #endif
 
+    // Send the mode with the given index (not mode number!) return the total number of modes
+    // Index starts at 1
+    uint8_t send_available_mode(uint8_t index) const override;
+
 private:
 
     // sanity check velocity or acceleration vector components are numbers