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gnss_module.c
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gnss_module.c
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/*
* Copyright (c) 2021 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
*/
#include <zephyr/kernel.h>
#include <nrf_modem_gnss.h>
#include <app_event_manager.h>
#if defined(CONFIG_LWM2M_CLIENT_UTILS_LOCATION_ASSIST_AGNSS)
#include <net/lwm2m_client_utils_location.h>
#include "location_events.h"
#endif
#if defined(CONFIG_LWM2M_CLIENT_UTILS_LOCATION_ASSIST_PGPS)
#include <net/lwm2m_client_utils_location.h>
#include <net/nrf_cloud_pgps.h>
#include "location_events.h"
#endif
#include "gnss_module.h"
#include "gnss_pvt_event.h"
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(gnss_module, CONFIG_APP_LOG_LEVEL);
static struct nrf_modem_gnss_pvt_data_frame pvt_data;
#if defined(CONFIG_LWM2M_CLIENT_UTILS_LOCATION_ASSIST_AGNSS) || \
defined(CONFIG_LWM2M_CLIENT_UTILS_LOCATION_ASSIST_PGPS)
static struct nrf_modem_gnss_agnss_data_frame agnss_req;
#endif
static bool running;
#if defined(CONFIG_LWM2M_CLIENT_UTILS_LOCATION_ASSIST_PGPS)
void pgps_handler(struct nrf_cloud_pgps_event *event)
{
int err;
switch (event->type) {
case PGPS_EVT_INIT:
LOG_DBG("PGPS_EVT_INIT");
break;
case PGPS_EVT_UNAVAILABLE:
LOG_DBG("PGPS_EVT_UNAVAILABLE");
break;
case PGPS_EVT_LOADING:
LOG_DBG("PGPS_EVT_LOADING");
break;
case PGPS_EVT_READY:
LOG_DBG("PGPS_EVT_READY");
break;
case PGPS_EVT_AVAILABLE:
LOG_DBG("PGPS_EVT_AVAILABLE");
err = nrf_cloud_pgps_inject(event->prediction, &agnss_req);
if (err) {
LOG_ERR("Unable to send prediction to modem: %d", err);
}
err = nrf_cloud_pgps_preemptive_updates();
if (err) {
LOG_ERR("Error requesting updates: %d", err);
}
break;
case PGPS_EVT_REQUEST: {
LOG_DBG("PGPS_EVT_REQUEST");
struct pgps_data_request_event *event = new_pgps_data_request_event();
APP_EVENT_SUBMIT(event);
}
break;
default:
LOG_WRN("Unknown P-GPS event");
break;
}
}
#endif
/**@brief Callback for GNSS events */
static void gnss_event_handler(int event_id)
{
int err = 0;
switch (event_id) {
case NRF_MODEM_GNSS_EVT_FIX: {
LOG_INF("GNSS fix available");
err = nrf_modem_gnss_read(&pvt_data, sizeof(pvt_data), NRF_MODEM_GNSS_DATA_PVT);
if (err) {
LOG_ERR("Error reading PVT data (%d)", err);
return;
}
struct gnss_pvt_event *event = new_gnss_pvt_event();
event->pvt = pvt_data;
APP_EVENT_SUBMIT(event);
break;
}
case NRF_MODEM_GNSS_EVT_AGNSS_REQ: {
#if defined(CONFIG_LWM2M_CLIENT_UTILS_LOCATION_ASSIST_AGNSS) || \
defined(CONFIG_LWM2M_CLIENT_UTILS_LOCATION_ASSIST_PGPS)
LOG_INF("GPS requests A-GNSS Data. Sending request to LwM2M server");
err = nrf_modem_gnss_read(&agnss_req, sizeof(agnss_req),
NRF_MODEM_GNSS_DATA_AGNSS_REQ);
if (err) {
LOG_ERR("Error reading A-GNSS request (%d)", err);
}
#endif
#if defined(CONFIG_LWM2M_CLIENT_UTILS_LOCATION_ASSIST_AGNSS)
struct gnss_agnss_request_event *event = new_gnss_agnss_request_event();
event->agnss_req = agnss_req;
APP_EVENT_SUBMIT(event);
#endif
break;
}
case NRF_MODEM_GNSS_EVT_PERIODIC_WAKEUP:
LOG_DBG("GNSS search started");
break;
case NRF_MODEM_GNSS_EVT_SLEEP_AFTER_TIMEOUT:
LOG_DBG("GNSS timed out waiting for fix");
break;
default:
break;
}
}
int initialise_gnss(void)
{
int err;
err = nrf_modem_gnss_event_handler_set(gnss_event_handler);
if (err) {
LOG_ERR("Could not set event handler for GNSS (%d)", err);
return err;
}
/* This use case flag should always be set. */
uint8_t use_case = NRF_MODEM_GNSS_USE_CASE_MULTIPLE_HOT_START;
/* Disable GNSS scheduled downloads if A-GNSS is used. */
if (IS_ENABLED(CONFIG_LWM2M_CLIENT_UTILS_LOCATION_ASSIST_AGNSS)) {
use_case |= NRF_MODEM_GNSS_USE_CASE_SCHED_DOWNLOAD_DISABLE;
}
err = nrf_modem_gnss_use_case_set(use_case);
if (err) {
LOG_ERR("Failed to set GNSS use case (%d)", err);
return err;
}
uint16_t search_interval = CONFIG_GNSS_SEARCH_INTERVAL_TIME;
err = nrf_modem_gnss_fix_interval_set(search_interval);
if (err) {
LOG_ERR("Could not set fix interval for GNSS %d (%d)", search_interval, err);
return err;
}
uint16_t search_timeout = CONFIG_GNSS_SEARCH_TIMEOUT_TIME;
err = nrf_modem_gnss_fix_retry_set(search_timeout);
if (err) {
LOG_ERR("Could not set fix timeout for GNSS %d (%d)", search_timeout, err);
return err;
}
return err;
}
int start_gnss(void)
{
int err;
if (running) {
return -EALREADY;
}
#if defined(CONFIG_LWM2M_CLIENT_UTILS_LOCATION_ASSIST_PGPS)
struct nrf_cloud_pgps_init_param param = {
.event_handler = pgps_handler,
/* storage is defined by CONFIG_NRF_CLOUD_PGPS_STORAGE */
.storage_base = 0u,
.storage_size = 0u
};
err = nrf_cloud_pgps_init(¶m);
if (err) {
LOG_ERR("nrf_cloud_pgps_init: %d", err);
}
nrf_cloud_pgps_notify_prediction();
#endif
err = nrf_modem_gnss_start();
if (err) {
LOG_ERR("Could not start GNSS (%d)", err);
} else {
LOG_DBG("Started GNSS scan");
running = true;
#if defined(CONFIG_GNSS_PRIORITY_ON_FIRST_FIX)
/* Priority mode is disabled automatically after first fix */
err = nrf_modem_gnss_prio_mode_enable();
if (err) {
LOG_ERR("Could not set priority mode for GNSS (%d)", err);
}
#endif
}
return err;
}