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# Garmin
from decimal import Decimal
from ... import nmea
class GRM(nmea.ProprietarySentence):
sentence_types = {}
def __new__(_cls, manufacturer, data):
name = manufacturer + data[0]
cls = _cls.sentence_types.get(name, _cls)
return super(GRM, cls).__new__(cls)
def __init__(self, manufacturer, data):
self.sentence_type = manufacturer + data[0]
super(GRM, self).__init__(manufacturer, data)
class GRME(GRM):
""" GARMIN Estimated position error
"""
fields = (
("Subtype", "subtype"),
("Estimated Horiz. Position Error", "hpe", Decimal),
("Estimated Horiz. Position Error Unit (M)", "hpe_unit"),
("Estimated Vert. Position Error", "vpe", Decimal),
("Estimated Vert. Position Error Unit (M)", "vpe_unit"),
("Estimated Horiz. Position Error", "osepe", Decimal),
("Overall Spherical Equiv. Position Error", "osepe_unit"),
)
class GRMM(GRM):
""" GARMIN Map Datum
"""
fields = (
("Subtype", "subtype"),
('Currently Active Datum', 'datum'),
)
class GRMW(GRM):
""" GARMIN Waypoint Information
https://www8.garmin.com/support/pdf/NMEA_0183.pdf
https://github.com/wb2osz/direwolf/blob/master/waypoint.c
$PGRMW,wname,alt,symbol,comment*99
Where,
wname is waypoint name. Must match existing waypoint.
alt is altitude in meters.
symbol is symbol code. Hexadecimal up to FFFF.
See Garmin Device Interface Specification
001-0063-00 for values of "symbol_type."
comment is comment for the waypoint.
*99 is checksum
"""
fields = (
("Subtype", "subtype"),
("Waypoint Name", "wname"),
("Altitude", "altitude", Decimal),
("Symbol", "symbol"),
("Comment", "comment"),
)
class GRMZ(GRM):
""" GARMIN Altitude Information
"""
fields = (
("Subtype", "subtype"),
("Altitude", "altitude", Decimal),
("Altitude Units (Feet)", "altitude_unit"),
("Positional Fix Dimension (2=user, 3=GPS)", "pos_fix_dim"),
)
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