diff options
Diffstat (limited to 'drivers.c')
| -rw-r--r-- | drivers.c | 15 |
1 files changed, 12 insertions, 3 deletions
@@ -1055,10 +1055,10 @@ static const struct gps_type_t driver_garmintxt = { #ifdef MTK3301_ENABLE /************************************************************************** * - * MediaTek MTK-3301 and 3329 + * MediaTek MTK-3301, 3329, 3339 * - * OEMs for several GPS vendors, notably including Garmin and FasTrax. - * Website at <http://www.mediatek.com/>. + * OEMs for several GPS vendors, notably including Garmin, FasTrax, Trimble, + * and AdaFruit. Website at <http://www.mediatek.com/>. * * The Trimble Condor appears to be an MTK3329. It behaves as an MTK3301 * and positively acknowledges all 3301 sentences as valid. It ignores $PMTK @@ -1066,6 +1066,15 @@ static const struct gps_type_t driver_garmintxt = { * not have power-save mode and ignores $PMTK320. For $PMTK314 it silently * ignores periodic enabling of messages that aren't supported. * + * From its datasheet the MTK3339 seems to add QZSS support not present in + * earlier versions. The data sheet says it has 66 channels, which mkes + * sense given the multi-constellation capability. The channel count + * in the driver is never used by the NMEA driver so leaving the lower MTK3301 + * value in there is OK. + * + * The Adafruit GPS HAT for the Raspberry Pi is an MTK3339. It works with this + * driver; in fact AdaFruit's overview page for the product features GPSD. + * **************************************************************************/ static void mtk3301_event_hook(struct gps_device_t *session, event_t event) |