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core: gps: added field for HDOP to GPS data 

HDOP is expressed in cm, meaning that an HDOP of 1.37m is stored as 137 in
the GPS data structure.
This commit is contained in:
Silvano Seva 2025-08-21 16:56:18 +02:00
parent e738e18d16
commit 2f0b7f8df7
3 changed files with 16 additions and 1 deletions
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14
lib/minmea/include/minmea.h
View File

@ -271,6 +271,20 @@ static inline int minmea_toint(struct minmea_float *f)
return f->value / f->scale;
}
/**
* Convert a fixed-point value to an integer value, applying an additional
* scaling factor.
* Returns zero for "unknown" values.
*/
static inline int minmea_toscaledint(struct minmea_float *f, const int scale)
{
if(f->scale == 0)
return 0;
int_least32_t tmp = f->value * scale;
return tmp / f->scale;
}
#ifdef __cplusplus
}
#endif

1
openrtx/include/core/gps.h
View File

@ -54,6 +54,7 @@ typedef struct
uint16_t speed; // Ground speed in km/h
int16_t tmg_mag; // Course over ground, degrees, magnetic
int16_t tmg_true; // Course over ground, degrees, true
uint16_t hdop; // Horizontal dilution of precision, in cm
}
gps_t;

2
openrtx/src/core/gps.c
View File

@ -87,7 +87,6 @@ void gps_task(const struct gpsDevice *dev)
gps_data.timestamp.year = frame.date.year;
}
gps_data.tmg_true = minmea_tofloat(&frame.course);
gps_data.speed = KNOTS2KMH(minmea_toint(&frame.speed));
}
break;
@ -110,6 +109,7 @@ void gps_task(const struct gpsDevice *dev)
struct minmea_sentence_gsa frame;
if (minmea_parse_gsa(&frame, sentence))
{
gps_data.hdop = minmea_toscaledint(&frame.hdop, 100);
gps_data.fix_type = frame.fix_type;
for (int i = 0; i < 12; i++)
{