/* * Copyright (C) 2018 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package android.hardware.gnss@2.0; import @1.0::IGnssMeasurementCallback; import @1.1::IGnssMeasurementCallback; import ElapsedRealtime; import GnssConstellationType; /** The callback interface to report measurements from the HAL. */ interface IGnssMeasurementCallback extends @1.1::IGnssMeasurementCallback { /** * Flags indicating the GNSS measurement state. * *

The expected behavior here is for GNSS HAL to set all the flags that apply. For example, * if the state for a satellite is only C/A code locked and bit synchronized, and there is still * millisecond ambiguity, the state must be set as: * * STATE_CODE_LOCK | STATE_BIT_SYNC | STATE_MSEC_AMBIGUOUS * *

If GNSS is still searching for a satellite, the corresponding state must be set to * STATE_UNKNOWN(0). * *

In @2.0::IGnssMeasurementCallback.GnssMeasurement, v1_1.v1_0.receivedSvTimeInNs, the * received satellite time, is relative to the beginning of the system week for all * constellations except for Glonass where it is relative to the beginning of the Glonass system * day. * *

The table below indicates the valid range of the received GNSS satellite time. These * ranges depend on the constellation and code being tracked and the state of the tracking * algorithms given by the getState method. If the state flag is set, then the valid measurement * range is zero to the value in the table. The state flag with the widest range indicates the * range of the received GNSS satellite time value. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* GPS/QZSSGLNSBDSGALSBAS
State FlagL1 C/AL5IL5QL1OFB1I (D1)B1I  (D2)E1BE1CE5AQL1 C/A
* STATE_UNKNOWN * 0000000000
* STATE_CODE_LOCK * 1 ms1 ms1 ms1 ms1 ms1 ms--1 ms1 ms
* STATE_SYMBOL_SYNC * 20 ms (optional)10 ms1 ms (optional)10 ms20 ms (optional)2 ms4 ms (optional)4 ms (optional)1 ms (optional)2 ms
* STATE_BIT_SYNC * 20 ms20 ms1 ms (optional)20 ms20 ms-8 ms-1 ms (optional)4 ms
* STATE_SUBFRAME_SYNC * 6s6s-2 s6 s---100 ms-
* STATE_TOW_DECODED * 1 week-1 day1 week1 week-1 week
* STATE_TOW_KNOWN * 1 week1 day1 week1 week1 week
* STATE_GLO_STRING_SYNC * ---2 s------
* STATE_GLO_TOD_DECODED * ---1 day------
* STATE_GLO_TOD_KNOWN * ---1 day------
* STATE_BDS_D2_BIT_SYNC * -----2 ms----
* STATE_BDS_D2_SUBFRAME_SYNC * -----600 ms----
* STATE_GAL_E1BC_CODE_LOCK * ------4 ms4 ms--
* STATE_GAL_E1C_2ND_CODE_LOCK * -------100 ms--
* STATE_2ND_CODE_LOCK * -10 ms (optional)20 ms----100 ms (optional)100 ms-
* STATE_GAL_E1B_PAGE_SYNC * ------2 s---
* STATE_SBAS_SYNC * ---------1 s
* *

Note: TOW Known refers to the case where TOW is possibly not decoded over the air but has * been determined from other sources. If TOW decoded is set then TOW Known must also be set. * *

Note well: if there is any ambiguity in integer millisecond, STATE_MSEC_AMBIGUOUS must be * set accordingly, in the 'state' field. This value must be populated if 'state' != * STATE_UNKNOWN. * *

Note on optional flags: *

* */ @export(name="", value_prefix="GNSS_MEASUREMENT_") enum GnssMeasurementState : uint32_t { STATE_UNKNOWN = 0, STATE_CODE_LOCK = 1 << 0, STATE_BIT_SYNC = 1 << 1, STATE_SUBFRAME_SYNC = 1 << 2, STATE_TOW_DECODED = 1 << 3, STATE_MSEC_AMBIGUOUS = 1 << 4, STATE_SYMBOL_SYNC = 1 << 5, STATE_GLO_STRING_SYNC = 1 << 6, STATE_GLO_TOD_DECODED = 1 << 7, STATE_BDS_D2_BIT_SYNC = 1 << 8, STATE_BDS_D2_SUBFRAME_SYNC = 1 << 9, STATE_GAL_E1BC_CODE_LOCK = 1 << 10, STATE_GAL_E1C_2ND_CODE_LOCK = 1 << 11, STATE_GAL_E1B_PAGE_SYNC = 1 << 12, STATE_SBAS_SYNC = 1 << 13, STATE_TOW_KNOWN = 1 << 14, STATE_GLO_TOD_KNOWN = 1 << 15, STATE_2ND_CODE_LOCK = 1 << 16, }; /** * Extends a GNSS Measurement, adding a GnssMeasurementCodeType, a GnssMeasurementState, and * replacing the GnssConstellationType. */ struct GnssMeasurement { /** * GNSS measurement information for a single satellite and frequency, as in the 1.1 * version of the HAL with further clarification of the value reported in the * accumulatedDeltaRangeM field, i.e., the alignment of the phase measurement will not be * adjusted by the receiver so the in-phase and quadrature phase components will have a * quarter cycle offset as they do when transmitted from the satellites. If the measurement * is from a combination of the in-phase and quadrature phase components, then the alignment * of the phase measurement will be aligned to the in-phase component. * * In this version of the HAL, the field 'state' in the v1_1.v1_0 struct is deprecated, and * is no longer used by the framework. The satellite sync state is instead reported in * @2.0::IGnssMeasurementCallback.GnssMeasurement.state. * * In this version of the HAL, the field 'constellation' in the v1_1.v1_0 struct is * deprecated, and is no longer used by the framework. The constellation type is instead * reported in @2.0::IGnssMeasurementCallback.GnssMeasurement.constellation. */ @1.1::IGnssMeasurementCallback.GnssMeasurement v1_1; /** * The type of code that is currently being tracked in the GNSS measurement. * * For high precision applications the type of code being tracked needs to be considered * in-order to properly apply code specific corrections to the pseudorange measurements. * * Value "A" represents GALILEO E1A, GALILEO E6A, IRNSS L5A, IRNSS SA. * * Value "B" represents GALILEO E1B, GALILEO E6B, IRNSS L5B, IRNSS SB. * * Value "C" represents GPS L1 C/A, GPS L2 C/A, GLONASS G1 C/A, GLONASS G2 C/A, GALILEO E1C, * GALILEO E6C, SBAS L1 C/A, QZSS L1 C/A, IRNSS L5C. * * value "D" represents BDS B1C D. * * Value "I" represents GPS L5 I, GLONASS G3 I, GALILEO E5a I, GALILEO E5b I, GALILEO E5a+b I, * SBAS L5 I, QZSS L5 I, BDS B1 I, BDS B2 I, BDS B3 I. * * Value "L" represents GPS L1C (P), GPS L2C (L), QZSS L1C (P), QZSS L2C (L), LEX(6) L. * * Value "M" represents GPS L1M, GPS L2M. * * Value "N" represents GPS L1 codeless, GPS L2 codeless. * * Value "P" represents GPS L1P, GPS L2P, GLONASS G1P, GLONASS G2P, BDS B1C P. * * Value "Q" represents GPS L5 Q, GLONASS G3 Q, GALILEO E5a Q, GALILEO E5b Q, GALILEO E5a+b Q, * SBAS L5 Q, QZSS L5 Q, BDS B1 Q, BDS B2 Q, BDS B3 Q. * * Value "S" represents GPS L1C (D), GPS L2C (M), QZSS L1C (D), QZSS L2C (M), LEX(6) S. * * Value "W" represents GPS L1 Z-tracking, GPS L2 Z-tracking. * * Value "X" represents GPS L1C (D+P), GPS L2C (M+L), GPS L5 (I+Q), GLONASS G3 (I+Q), * GALILEO E1 (B+C), GALILEO E5a (I+Q), GALILEO E5b (I+Q), GALILEO E5a+b(I+Q), * GALILEO E6 (B+C), SBAS L5 (I+Q), QZSS L1C (D+P), QZSS L2C (M+L), QZSS L5 (I+Q), * LEX(6) (S+L), BDS B1 (I+Q), BDS B1C (D+P), BDS B2 (I+Q), BDS B3 (I+Q), IRNSS L5 (B+C). * * Value "Y" represents GPS L1Y, GPS L2Y. * * Value "Z" represents GALILEO E1 (A+B+C), GALILEO E6 (A+B+C), QZSS L1-SAIF. * * Value "UNKNOWN" represents the GNSS Measurement's code type is unknown. * * This is used to specify the observation descriptor defined in GNSS Observation Data File * Header Section Description in the RINEX standard (Version 3.XX). In RINEX Version 3.03, * in Appendix Table A2 Attributes are listed as uppercase letters (for instance, "A" for * "A channel"). In the future, if for instance a code "G" was added in the official RINEX * standard, "G" could be specified here. */ string codeType; /** * Per satellite sync state. It represents the current sync state for the associated * satellite. * * Based on the sync state, the receivedSvTimeInNs field must be interpreted accordingly. * * This value is mandatory. */ bitfield state; /** * The constellation type of the GNSS measurement. */ GnssConstellationType constellation; }; /** * Complete set of GNSS Measurement data, same as 1.1 with additional enum in measurements. */ struct GnssData { /** The full set of satellite measurement observations. */ vec measurements; /** The GNSS clock time reading. */ GnssClock clock; /** * Timing information of the GNSS data synchronized with SystemClock.elapsedRealtimeNanos() * clock. */ ElapsedRealtime elapsedRealtime; }; /** * Callback for the hal to pass a GnssData structure back to the client. * * @param data Contains a reading of GNSS measurements. */ gnssMeasurementCb_2_0(GnssData data); };