Clean up atest EAS receive.

Author: wb2osz

man/atest.1

@@ -37,6 +37,10 @@ Data rate in bits/sec.  Standard values are 300, 1200, 2400, 4800, 9600.
 4800 bps uses 8PSK based on V.27 standard.
 .P
 9600 bps and up uses K9NG/G3RUH standard.
+.P
+AIS for ship Automatic Identification System.
+.P
+EAS for Emergency Alert System (EAS) Specific Area Message Encoding (SAME).
 .RE
 .RE
 .PD

src/atest.c

@@ -2,7 +2,7 @@
 //
 //    This file is part of Dire Wolf, an amateur radio packet TNC.
 //
-//    Copyright (C) 2011, 2012, 2013, 2014, 2015, 2016, 2019, 2021, 2022  John Langner, WB2OSZ
+//    Copyright (C) 2011, 2012, 2013, 2014, 2015, 2016, 2019, 2021, 2022, 2023  John Langner, WB2OSZ
 //
 //    This program is free software: you can redistribute it and/or modify
 //    it under the terms of the GNU General Public License as published by
@@ -276,12 +276,12 @@ int main (int argc, char *argv[])
 
             case 'B':				/* -B for data Bit rate */
 						/* Also implies modem type based on speed. */
-						/* Special case "AIS" rather than number. */
+						/* Special cases AIS, EAS rather than number. */
 	      if (strcasecmp(optarg, "AIS") == 0) {
-	        B_opt = 12345;	// See special case below.
+	        B_opt = 0xA15A15;	// See special case below.
 	      }
 	      else if (strcasecmp(optarg, "EAS") == 0) {
-	        B_opt = 23456;	// See special case below.
+	        B_opt = 0xEA5EA5;	// See special case below.
 	      }
 	      else {
 	        B_opt = atoi(optarg);
@@ -425,11 +425,6 @@ int main (int argc, char *argv[])
 
         my_audio_config.achan[0].baud = B_opt;
 
-        if (my_audio_config.achan[0].baud < MIN_BAUD || my_audio_config.achan[0].baud > MAX_BAUD) {
-	  text_color_set(DW_COLOR_ERROR);
-          dw_printf ("Use a more reasonable bit rate in range of %d - %d.\n", MIN_BAUD, MAX_BAUD);
-          exit (EXIT_FAILURE);
-        }
 
 	/* We have similar logic in direwolf.c, config.c, gen_packets.c, and atest.c, */
 	/* that need to be kept in sync.  Maybe it could be a common function someday. */
@@ -438,21 +433,18 @@ int main (int argc, char *argv[])
 	  my_audio_config.achan[0].modem_type = MODEM_AFSK;
 	  my_audio_config.achan[0].mark_freq = 1615;
 	  my_audio_config.achan[0].space_freq = 1785;
-	  //strlcpy (my_audio_config.achan[0].profiles, "A", sizeof(my_audio_config.achan[0].profiles));
 	}
 	else if (my_audio_config.achan[0].baud < 600) {		// e.g. HF SSB packet
 	  my_audio_config.achan[0].modem_type = MODEM_AFSK;
 	  my_audio_config.achan[0].mark_freq = 1600;
 	  my_audio_config.achan[0].space_freq = 1800;
 	  // Previously we had a "D" which was fine tuned for 300 bps.
 	  // In v1.7, it's not clear if we should use "B" or just stick with "A".
-	  //strlcpy (my_audio_config.achan[0].profiles, "B", sizeof(my_audio_config.achan[0].profiles));
 	}
 	else if (my_audio_config.achan[0].baud < 1800) {	// common 1200
 	  my_audio_config.achan[0].modem_type = MODEM_AFSK;
 	  my_audio_config.achan[0].mark_freq = DEFAULT_MARK_FREQ;
 	  my_audio_config.achan[0].space_freq = DEFAULT_SPACE_FREQ;
-	// Should default to E+ or something similar later.
 	}
 	else if (my_audio_config.achan[0].baud < 3600) {
 	  my_audio_config.achan[0].modem_type = MODEM_QPSK;
@@ -466,14 +458,14 @@ int main (int argc, char *argv[])
 	  my_audio_config.achan[0].space_freq = 0;
 	  strlcpy (my_audio_config.achan[0].profiles, "", sizeof(my_audio_config.achan[0].profiles));
 	}
-	else if (my_audio_config.achan[0].baud == 12345) {	// Hack for different use of 9600
+	else if (my_audio_config.achan[0].baud == 0xA15A15) {	// Hack for different use of 9600
 	  my_audio_config.achan[0].modem_type = MODEM_AIS;
 	  my_audio_config.achan[0].baud = 9600;
 	  my_audio_config.achan[0].mark_freq = 0;
 	  my_audio_config.achan[0].space_freq = 0;
 	  strlcpy (my_audio_config.achan[0].profiles, " ", sizeof(my_audio_config.achan[0].profiles));	// avoid getting default later.
 	}
-	else if (my_audio_config.achan[0].baud == 23456) {
+	else if (my_audio_config.achan[0].baud == 0xEA5EA5) {
 	  my_audio_config.achan[0].modem_type = MODEM_EAS;
 	  my_audio_config.achan[0].baud = 521;	// Actually 520.83 but we have an integer field here.
 						// Will make more precise in afsk demod init.
@@ -488,6 +480,12 @@ int main (int argc, char *argv[])
 	  strlcpy (my_audio_config.achan[0].profiles, " ", sizeof(my_audio_config.achan[0].profiles));	// avoid getting default later.
 	}
 
+        if (my_audio_config.achan[0].baud < MIN_BAUD || my_audio_config.achan[0].baud > MAX_BAUD) {
+	  text_color_set(DW_COLOR_ERROR);
+          dw_printf ("Use a more reasonable bit rate in range of %d - %d.\n", MIN_BAUD, MAX_BAUD);
+          exit (EXIT_FAILURE);
+        }
+
 /*
  * -g option means force g3RUH regardless of speed.
  */