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gnss: add GNSS assistance support

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Automatically fetch the GNSS assistance data from the Web
to heavily reduce the time to acquire a GNSS lock by uploading
the assistance data to the modem.
This feature is optional and can be disabled in the configuration
as people may prefer to not download the assistance data from
the Quectel/Qualcomm servers.
Also configure the GNSS engine to optimize the performance
and power consumption.
This commit is contained in:
Dylan Van Assche
2021-05-12 19:37:21 +02:00
parent 5da7c88fc4
commit 9cfe782f74
11 changed files with 625 additions and 12 deletions
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34
src/manager.h
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@@ -16,6 +16,32 @@
#include "toml.h"
typedef enum {
EG25_GNSS_STEP_FIRST = 0,
#ifdef HAVE_MMGLIB
EG25_GNSS_STEP_MM_GNSS_DISABLE,
#endif
EG25_GNSS_STEP_AT_GNSS_DISABLE,
EG25_GNSS_STEP_FETCH_ASSISTANCE_DATA,
EG25_GNSS_STEP_INIT_UPLOAD,
EG25_GNSS_STEP_UPLOAD,
EG25_GNSS_STEP_FINISH_UPLOAD,
#ifdef HAVE_MMGLIB
EG25_GNSS_STEP_MM_GNSS_ENABLE,
#endif
EG25_GNSS_STEP_AT_QGPS_ENABLE,
EG25_GNSS_STEP_LAST,
} EG25GNSSStep;
typedef enum {
EG25_GNSS_SOURCE_NONE = 0,
EG25_GNSS_SOURCE_NMEA = 1 << 0,
EG25_GNSS_SOURCE_RAW = 1 << 1,
EG25_GNSS_SOURCE_UNMANAGED = 1 << 2,
EG25_GNSS_SOURCE_QGPS = 1 << 3,
} EG25GNSSSource;
enum EG25State {
EG25_STATE_INIT = 0,
EG25_STATE_POWERED, // Power-on sequence has been executed, but the modem isn't on yet
@@ -52,11 +78,19 @@ struct EG25Manager {
enum EG25State modem_state;
gchar *modem_usb_id;
gboolean gnss_assistance_enabled;
EG25GNSSSource gnss_sources;
EG25GNSSStep gnss_assistance_step;
gint gnss_assistance_fd;
gchar *gnss_assistance_url;
gchar *gnss_assistance_file;
enum ModemIface modem_iface;
guint mm_watch;
#ifdef HAVE_MMGLIB
MMManager *mm_manager;
MMModem *mm_modem;
MMModemLocation *mm_location;
#endif
guint ofono_watch;
GDBOManager *ofono_manager;