examples/awsiot_gnsslogger: Add processing to stop gnss

It is necessary to close gnss driver after stopping it.

examples/awsiot_gnsslogger/README.txt

@@ -120,15 +120,15 @@ examples/awsiot_gnsslogger
         Location is NOT fixed. 3 satellites is captured.
         ....
 
-      To capture GNSS sattelites, take the device outside or by a window.
+      To capture GNSS satellites, take the device outside or by a window.
 
       After fix the measured location, the application will set UTC time and
       date which is measured by GNSS as a system time on the board. Then it
       connects to AWS IoT server.
       And after established the connectionm the location latitude and longitude
       is published as a topic on "data/device/gps" with below message.
 
-        Location is fixed. 4 sattelites is captured.
+        Location is fixed. 4 satellites is captured.
             Publish data to data/device/gps topic as <<{ "device_loc": { "lat": xxx.xxxxx, "lng": xxx.xxxxxx } }>>
 
       If you subscribe the topic "data/device/gps" in AWS IoTCore, you can see

examples/awsiot_gnsslogger/awsiot_connect.c

@@ -225,7 +225,7 @@ int publish_topic(AWS_IoT_Client *client, const char *topic, uint8_t *data, int
 
   if (rc != SUCCESS)
     {
-      printf("An error occured of the publish : %d.\n", rc);
+      printf("An error occurred of the publish : %d.\n", rc);
       return -1;
     }
 

examples/awsiot_gnsslogger/awsiot_gnsslogger_main.c

@@ -174,7 +174,7 @@ int main(int argc, FAR char *argv[])
 
   snprintf(topic_name, sizeof(topic_name), LOCATION_TOPIC, app_config.client_id);
 
-  /* Initialze GNSS driver */
+  /* Initialize GNSS driver */
 
   gnss_fd = init_gnss(&mask);
   if (gnss_fd < 0)
@@ -265,7 +265,7 @@ int main(int argc, FAR char *argv[])
             aws_iot_mqtt_yield(&client, 10);
             break;
 
-          case GNSS_UTIL_STATE_ERROR: /* Error is occured */
+          case GNSS_UTIL_STATE_ERROR: /* Error is occurred */
             printf("Known error is returned.. ");
           default:
             printf("Error happened.\n");

examples/awsiot_gnsslogger/gnss_util.c

@@ -1,7 +1,7 @@
 /****************************************************************************
  * examples/awsiot_gnsslogger/gnss_util.c
  *
- *   Copyright 2021 Sony Semiconductor Solutions Corporation
+ *   Copyright 2021, 2022 Sony Semiconductor Solutions Corporation
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -37,6 +37,8 @@
  * Included Files
  ****************************************************************************/
 
+#include <nuttx/config.h>
+
 #include <stdio.h>
 #include <fcntl.h>
 #include <string.h>
@@ -73,7 +75,7 @@ static struct cxd56_gnss_positiondata_s posdat;
  *
  * Returned Value:
  *   Negative value is returned when an error is happened.
- *   When the initialization is successed, file descripter is returned.
+ *   When the initialization is successful, file descripter is returned.
  *
  ****************************************************************************/
 
@@ -108,7 +110,7 @@ int init_gnss(sigset_t *mask)
   setting.signo   = MY_GNSS_SIG;
   setting.data    = NULL;
   er = ioctl(fd, CXD56_GNSS_IOCTL_SIGNAL_SET, (unsigned long)&setting);
-  if(er < 0)
+  if (er < 0)
     {
       printf("ioctl(SIGNAL_SET) error:%d\n", er);
       sigprocmask(SIG_UNBLOCK, mask, NULL);
@@ -233,6 +235,10 @@ void fin_gnss(int fd, sigset_t *mask)
 {
   struct cxd56_gnss_signal_setting_s setting;
 
+  /* Stop GNSS. */
+
+  ioctl(fd, CXD56_GNSS_IOCTL_STOP, 0);
+
   memset(&setting, 0, sizeof(setting));
 
   setting.enable = 0;