154 lines
5.1 KiB
C
154 lines
5.1 KiB
C
/****************************************************************************
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* examples/hello/gps_main.c
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Alan Carvalho de Assis <acassis@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <wchar.h>
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#include <syslog.h>
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#include "gpsutils/minmea.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* gps_main
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****************************************************************************/
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int main(int argc, FAR char *argv[])
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{
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int fd;
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int cnt;
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char ch;
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char line[MINMEA_MAX_LENGTH];
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/* Open the GPS serial port */
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fd = open("/dev/ttyS1", O_RDONLY);
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if (fd < 0)
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{
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printf("Unable to open file /dev/ttyS1\n");
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}
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/* Run forever */
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for (; ; )
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{
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/* Read until we complete a line */
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cnt = 0;
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do
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{
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read(fd, &ch, 1);
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if (ch != '\r' && ch != '\n')
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{
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line[cnt++] = ch;
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}
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}
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while (ch != '\r' && ch != '\n');
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line[cnt] = '\0';
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switch (minmea_sentence_id(line, false))
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{
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case MINMEA_SENTENCE_RMC:
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{
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struct minmea_sentence_rmc frame;
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if (minmea_parse_rmc(&frame, line))
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{
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printf("Fixed-point Latitude...........: %d\n",
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minmea_rescale(&frame.latitude, 1000));
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printf("Fixed-point Longitude..........: %d\n",
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minmea_rescale(&frame.longitude, 1000));
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printf("Fixed-point Speed..............: %d\n",
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minmea_rescale(&frame.speed, 1000));
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printf("Floating point degree latitude.: %2.6f\n",
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minmea_tocoord(&frame.latitude));
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printf("Floating point degree longitute: %2.6f\n",
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minmea_tocoord(&frame.longitude));
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printf("Floating point speed...........: %2.6f\n",
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minmea_tocoord(&frame.speed));
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}
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else
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{
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printf("$xxRMC sentence is not parsed\n");
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}
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}
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break;
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case MINMEA_SENTENCE_GGA:
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{
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struct minmea_sentence_gga frame;
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if (minmea_parse_gga(&frame, line))
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{
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printf("Fix quality....................: %d\n",
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frame.fix_quality);
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printf("Altitude.......................: %d\n",
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frame.altitude.value);
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printf("Tracked satellites.............: %d\n",
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frame.satellites_tracked);
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}
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else
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{
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printf("$xxGGA sentence is not parsed\n");
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}
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}
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break;
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case MINMEA_INVALID:
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case MINMEA_UNKNOWN:
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case MINMEA_SENTENCE_GSA:
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case MINMEA_SENTENCE_GLL:
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case MINMEA_SENTENCE_GST:
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case MINMEA_SENTENCE_GSV:
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{
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}
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break;
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}
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}
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return 0;
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}
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