extern __pdata uint16_t ao_boost_tick;
extern __pdata uint16_t ao_motor_number;
+#if HAS_IMU || HAS_MMA655X
+#define HAS_SENSOR_ERRORS 1
+#endif
+
+#if HAS_SENSOR_ERRORS
+extern __xdata uint8_t ao_sensor_errors;
+#endif
+
extern __pdata uint16_t ao_launch_time;
extern __pdata uint8_t ao_flight_force_idle;