mirror of https://github.com/wb2osz/direwolf.git
181 lines
4.1 KiB
C
181 lines
4.1 KiB
C
//
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// This file is part of Dire Wolf, an amateur radio packet TNC.
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//
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// Copyright (C) 2015 John Langner, WB2OSZ
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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//#define DEBUG 1
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/*------------------------------------------------------------------
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*
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* Module: walk96.c
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*
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* Purpose: Quick hack to read GPS location and send very frequent
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* position reports frames to a KISS TNC.
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*
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*
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*---------------------------------------------------------------*/
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#include <stdio.h>
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#include <unistd.h>
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#if __WIN32__
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#include <stdlib.h>
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#include <windows.h>
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#else
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#define __USE_XOPEN2KXSI 1
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#define __USE_XOPEN 1
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#include <stdlib.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <termios.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/errno.h>
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#endif
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#include <assert.h>
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#include <string.h>
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#include "direwolf.h"
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#include "config.h"
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#include "ax25_pad.h"
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#include "textcolor.h"
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#include "latlong.h"
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#include "nmea.h"
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#include "encode_aprs.h"
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#include "serial_port.h"
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#define MYCALL "WB2OSZ" /************ Change this if you use it!!! ***************/
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static MYFDTYPE tnc;
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main (int argc, char *argv[])
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{
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struct misc_config_s config;
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char cmd[100];
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// Look for Silicon Labs CP210x
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// Just happens to be same on desktop & laptop.
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tnc = serial_port_open ("COM5", 9600);
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if (tnc == MYFDERROR) {
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text_color_set (DW_COLOR_ERROR);
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dw_printf ("Can't open serial port to KISS TNC.\n");
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exit (EXIT_FAILURE); // defined in stdlib.h
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}
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strcpy (cmd, "\r\rhbaud 9600\rkiss on\rrestart\r");
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serial_port_write (tnc, cmd, strlen(cmd));
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SLEEP_MS(500);
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memset (&config, 0, sizeof(config));
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strcpy (config.nmea_port, "COM1");
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nmea_init (&config);
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SLEEP_SEC(20);
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// Exit out of KISS mode.
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serial_port_write (tnc, "\xc0\xff\c0", 3);
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SLEEP_MS(100);
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}
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/* Should be called once per second. */
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void walk96 (int fix, double lat, double lon, float knots, float course, float alt)
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{
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static int sequence = 0;
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char comment[50];
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sequence++;
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sprintf (comment, "Sequence number %04d", sequence);
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/*
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* Construct the packet in normal monitoring format.
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*/
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int messaging = 0;
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int compressed = 0;
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char info[AX25_MAX_INFO_LEN];
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int info_len;
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char position_report[AX25_MAX_PACKET_LEN];
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info_len = encode_position (messaging, compressed,
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lat, lon, (int)(DW_METERS_TO_FEET(alt)),
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'/', '?', // TODO: look up code for person.
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G_UNKNOWN, G_UNKNOWN, G_UNKNOWN, "", // PHG
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(int)course, (int)knots,
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445.925, 0, 0,
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comment,
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info, sizeof(info));
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sprintf (position_report, "%s>WALK96:%s", MYCALL, info);
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text_color_set (DW_COLOR_XMIT);
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dw_printf ("%s\n", position_report);
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/*
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* Convert it into AX.25 frame.
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*/
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packet_t pp;
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unsigned char ax25_frame[AX25_MAX_PACKET_LEN];
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int frame_len;
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pp = ax25_from_text (position_report, 1);
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if (pp == NULL) {
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text_color_set (DW_COLOR_ERROR);
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dw_printf ("Unexpected error in ax25_from_text. Quitting.\n");
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exit (EXIT_FAILURE); // defined in stdlib.h
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}
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ax25_frame[0] = 0; // Insert channel before KISS encapsulation.
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frame_len = ax25_pack (pp, ax25_frame+1);
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ax25_delete (pp);
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/*
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* Encapsulate as KISS and send to TNC.
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*/
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unsigned char kiss_frame[AX25_MAX_PACKET_LEN*2];
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int kiss_len;
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kiss_len = kiss_encapsulate (ax25_frame, frame_len+1, (unsigned char *)kiss_frame);
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//text_color_set (DW_COLOR_DEBUG);
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//dw_printf ("AX.25 frame length = %d, KISS frame length = %d\n", frame_len, kiss_len);
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//kiss_debug_print (1, NULL, kiss_frame, kiss_len);
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serial_port_write (tnc, kiss_frame, kiss_len);
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}
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/* end walk96.c */
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