eive-tmtc/eive_tmtc/tmtc/acs/gps.py

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Python
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import datetime
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import enum
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import logging
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import struct
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from eive_tmtc.config.definitions import CustomServiceList
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from eive_tmtc.pus_tm.defs import PrintWrapper
from tmtccmd.config import TmtcDefinitionWrapper, OpCodeEntry
from tmtccmd.config.tmtc import tmtc_definitions_provider
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from tmtccmd.tc.pus_200_fsfw_mode import create_mode_command, Mode
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from tmtccmd.tc import DefaultPusQueueHelper
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from tmtccmd.tc.pus_3_fsfw_hk import (
make_sid,
create_request_one_hk_command,
create_enable_periodic_hk_command_with_interval,
create_disable_periodic_hk_command,
)
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from tmtccmd.fsfw.tmtc_printer import FsfwTmTcPrinter
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_LOGGER = logging.getLogger(__name__)
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class GpsInfo:
MAX_SATELLITES = 30
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class OpCode:
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OFF = "off"
ON = "on"
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REQ_CORE_HK = ["core_hk_request"]
ENABLE_CORE_HK = ["core_hk_enable"]
DISABLE_CORE_HK = ["core_hk_disable"]
REQ_SKYVIEW_HK = ["skyview_hk_request"]
ENABLE_SKYVIEW_HK = ["skyview_hk_enable"]
DISABLE_SKYVIEW_HK = ["skyview_hk_disable"]
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RESET_GNSS = ["reset"]
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class Info:
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OFF = "Off"
ON = "On"
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REQ_CORE_HK = "Request Core HK"
ENABLE_CORE_HK = "Enable Core HK"
DISABLE_CORE_HK = "Disable Core HK"
REQ_SKYVIEW_HK = "Request Skyview HK"
ENABLE_SKYVIEW_HK = "Enable Skyview HK"
DISABLE_SKYVIEW_HK = "Disable Skyview HK"
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RESET_GNSS = "Reset GNSS using reset pin"
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class SetId(enum.IntEnum):
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CORE_HK = 0
SKYVIEW_HK = 1
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@tmtc_definitions_provider
def add_gps_cmds(defs: TmtcDefinitionWrapper):
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oce = OpCodeEntry()
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oce.add(keys=OpCode.OFF, info=Info.OFF)
oce.add(keys=OpCode.ON, info=Info.ON)
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oce.add(keys=OpCode.RESET_GNSS, info=Info.RESET_GNSS)
oce.add(keys=OpCode.REQ_CORE_HK, info=Info.REQ_CORE_HK)
oce.add(keys=OpCode.ENABLE_CORE_HK, info=Info.ENABLE_CORE_HK)
oce.add(keys=OpCode.DISABLE_CORE_HK, info=Info.DISABLE_CORE_HK)
oce.add(keys=OpCode.REQ_SKYVIEW_HK, info=Info.REQ_SKYVIEW_HK)
oce.add(keys=OpCode.ENABLE_SKYVIEW_HK, info=Info.ENABLE_SKYVIEW_HK)
oce.add(keys=OpCode.DISABLE_SKYVIEW_HK, info=Info.DISABLE_SKYVIEW_HK)
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defs.add_service(
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name=CustomServiceList.GPS_CTRL.value,
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info="GPS/GNSS Controller",
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op_code_entry=oce,
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)
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def pack_gps_command(object_id: bytes, q: DefaultPusQueueHelper, op_code: str):
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if op_code in OpCode.RESET_GNSS:
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# TODO: This needs to be re-implemented
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_LOGGER.warning("Reset pin handling needs to be re-implemented")
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if op_code in OpCode.ENABLE_CORE_HK:
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interval = float(input("Please specify interval in floating point seconds: "))
if interval <= 0:
raise ValueError("invalid interval")
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q.add_log_cmd(f"GPS: {Info.ENABLE_CORE_HK}")
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cmds = create_enable_periodic_hk_command_with_interval(
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diag=False, sid=make_sid(object_id=object_id, set_id=SetId.CORE_HK), interval_seconds=interval
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)
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for cmd in cmds:
q.add_pus_tc(cmd)
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if op_code in OpCode.DISABLE_CORE_HK:
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q.add_log_cmd(f"gps: {Info.DISABLE_CORE_HK}")
q.add_pus_tc(create_disable_periodic_hk_command(diag=False, sid=make_sid(object_id=object_id,
set_id=SetId.CORE_HK)))
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if op_code in OpCode.REQ_CORE_HK:
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q.add_log_cmd(f"GPS: {Info.REQ_CORE_HK}")
q.add_pus_tc(create_request_one_hk_command(sid=make_sid(object_id=object_id, set_id=SetId.CORE_HK)))
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if op_code in OpCode.ENABLE_SKYVIEW_HK:
interval = float(input("Please specify interval in floating point seconds: "))
if interval <= 0:
raise ValueError("invalid interval")
q.add_log_cmd(f"GPS: {Info.ENABLE_SKYVIEW_HK}")
cmds = create_enable_periodic_hk_command_with_interval(
diag=False, sid=make_sid(object_id=object_id, set_id=SetId.SKYVIEW_HK), interval_seconds=interval
)
for cmd in cmds:
q.add_pus_tc(cmd)
if op_code in OpCode.DISABLE_SKYVIEW_HK:
q.add_log_cmd(f"gps: {Info.DISABLE_SKYVIEW_HK}")
q.add_pus_tc(create_disable_periodic_hk_command(diag=False, sid=make_sid(object_id=object_id,
set_id=SetId.SKYVIEW_HK)))
if op_code in OpCode.REQ_SKYVIEW_HK:
q.add_log_cmd(f"GPS: {Info.REQ_SKYVIEW_HK}")
q.add_pus_tc(create_request_one_hk_command(sid=make_sid(object_id=object_id, set_id=SetId.SKYVIEW_HK)))
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if op_code in OpCode.ON:
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q.add_log_cmd(f"GPS: {Info.ON}")
q.add_pus_tc(create_mode_command(object_id, Mode.ON, 0))
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if op_code in OpCode.OFF:
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q.add_log_cmd(f"GPS: {Info.OFF}")
q.add_pus_tc(create_mode_command(object_id, Mode.OFF, 0))
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def handle_gps_data(
pw: PrintWrapper,
set_id: int,
hk_data: bytes,
packet_time: datetime.datetime,
):
pw.ilog(_LOGGER, f"Received GPS CTRL HK with packet time {packet_time}")
match set_id:
case SetId.CORE_HK:
handle_core_data(pw, hk_data)
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case SetId.SKYVIEW_HK:
handle_skyview_data(pw, hk_data)
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def handle_core_data(pw: PrintWrapper, hk_data: bytes):
if len(hk_data) < 4*8+4+2+8:
pw.dlog(
f"GPS Core dataset with size {len(hk_data)} does not have expected size"
f" of {4*8+4+2+8} bytes"
)
return
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current_idx = 0
fmt_str = "!ddddBBBHBBBBBI"
inc_len = struct.calcsize(fmt_str)
(
lat,
long,
alt,
speed,
fix,
sats_in_use,
sats_in_view,
year,
month,
day,
hours,
minutes,
seconds,
unix_seconds,
) = struct.unpack(fmt_str, hk_data[current_idx : current_idx + inc_len])
current_idx += inc_len
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if year == 0:
date_string = "No date string, year is 0"
else:
date_string = datetime.datetime(
year=year, month=month, day=day, hour=hours, minute=minutes, second=seconds
)
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pw.dlog(f"Lat: {lat} deg")
pw.dlog(f"Long: {long} deg")
pw.dlog(f"Altitude: {alt} m | Speed: {speed} m/s")
pw.dlog(
f"Fix Type: {fix} | Sats in View {sats_in_view} | Sats in Use {sats_in_use}"
)
pw.dlog(f"GNSS Date: {date_string}")
pw.dlog(f"Unix seconds {unix_seconds}")
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FsfwTmTcPrinter.get_validity_buffer(
validity_buffer=hk_data[current_idx:], num_vars=14
)
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def handle_skyview_data(pw: PrintWrapper, hk_data: bytes):
data_length = 8+GpsInfo.MAX_SATELLITES*(8+3*2+1)
if len(hk_data) < data_length:
pw.dlog(
f"GPS Skyview dataset with size {len(hk_data)} does not have expected size"
f" of {data_length} bytes"
)
return
current_idx = 0
fmt_str_unix = "!d"
fmt_str_int16 = "!" + "h" * GpsInfo.MAX_SATELLITES
fmt_str_double = "!" + "d" * GpsInfo.MAX_SATELLITES
fmt_str_uint8 = "!" + "B" * GpsInfo.MAX_SATELLITES
inc_len_unix = struct.calcsize(fmt_str_unix)
inc_len_int16 = struct.calcsize(fmt_str_int16)
inc_len_double = struct.calcsize(fmt_str_double)
inc_len_uint8 = struct.calcsize(fmt_str_uint8)
unix = struct.unpack(fmt_str_unix, hk_data[current_idx: current_idx + inc_len_unix])
current_idx += inc_len_unix
prn_id = struct.unpack(fmt_str_int16, hk_data[current_idx: current_idx + inc_len_int16])
current_idx += inc_len_int16
azimuth = struct.unpack(fmt_str_int16, hk_data[current_idx: current_idx + inc_len_int16])
current_idx += inc_len_int16
elevation = struct.unpack(fmt_str_int16, hk_data[current_idx: current_idx + inc_len_int16])
current_idx += inc_len_int16
signal_to_noise = struct.unpack(fmt_str_double, hk_data[current_idx: current_idx + inc_len_double])
current_idx += inc_len_double
used = struct.unpack(fmt_str_uint8, hk_data[current_idx: current_idx + inc_len_uint8])
current_idx += inc_len_uint8
pw.dlog(f"Skyview Time: {unix} unix-sec")
pw.dlog("{:<8} {:<8} {:<8} {:<8} {:<8}".format('PRN_ID', 'AZ [°]', 'EL [°]', 'S2N [dBW]', 'USED'))
for idx in range(GpsInfo.MAX_SATELLITES):
pw.dlog("{:<8} {:<8} {:<8} {:<8} {:<8}".format(prn_id[idx], azimuth[idx], elevation[idx], signal_to_noise[idx],
used[idx]))
FsfwTmTcPrinter.get_validity_buffer(
validity_buffer=hk_data[current_idx:], num_vars=6
)