1 files changed, 47 insertions, 0 deletions
diff --git a/src/nmea.h b/src/nmea.h
new file mode 100644
index 0000000..514aabc
--- /dev/null
+++ b/src/nmea.h
@@ -0,0 +1,47 @@
+#ifndef NMEA_H
+#define NMEA_H
+
+#define LAYERID_TRANSPORT	 0
+#define LAYERID_APPL		20
+
+/* NMEA only allows space for 12 sats */
+#define SAT_MAX_COUNT	12
+
+/* the highest value of sat svid */
+#define MAX_SAT_SVID	32
+
+#define GSV_FIELDS 19
+#define GSA_FIELDS 17
+#define GGA_FIELDS 14
+#define RMC_FIELDS 12
+
+typedef enum {
+	POSITION_NONE		= 0,
+	POSITION_LATITUDE	= 1 << 0,
+	POSITION_LONGITUDE	= 1 << 1,
+	POSITION_ALTITUDE	= 1 << 2
+} PositionFields;
+
+typedef enum {
+	COURSE_NONE		= 0,
+	COURSE_SPEED		= 1 << 0,
+	COURSE_DIRECTION	= 1 << 1,
+	COURSE_CLIMB		= 1 << 2
+} CourseFields;
+
+typedef enum {
+	FIX_INVALID = 0,
+	FIX_NONE,
+	FIX_2D,
+	FIX_3D
+} FixType;
+
+typedef enum {
+	ACCURACY_NONE		= 0,
+	ACCURACY_POSITION	= 1 << 0, /* 3D */
+	ACCURACY_HORIZONTAL	= 1 << 1, /* 2D */
+	ACCURACY_VERTICAL	= 1 << 2, /* Altitude */
+} AccuracyFields;
+
+#endif
+