Feature - add end-of-train and head-of-train message decoding

src/CMakeLists.txt

@@ -85,6 +85,8 @@ list(APPEND direwolf_SOURCES
   dwgpsnmea.c
   dwgpsd.c
   mheard.c
+  eotd.c
+  bch.c
   )
 
 if(LINUX)
@@ -276,6 +278,7 @@ list(APPEND gen_packets_SOURCES
   dtmf.c
   textcolor.c
   dsp.c
+  eotd_send.c
   )
 
 add_executable(gen_packets
@@ -317,6 +320,8 @@ list(APPEND atest_SOURCES
   symbols.c
   tt_text.c
   textcolor.c
+  eotd.c
+  bch.c
   )
 
 if(WIN32 OR CYGWIN)
@@ -469,6 +474,32 @@ if(WIN32 OR CYGWIN)
 endif()
 
 
+list(APPEND pkttest_SOURCES
+  pkttest.c
+  bch.c
+  eotd.c
+  textcolor.c
+  )
+
+add_executable(pkttest
+  ${pkttest_SOURCES}
+  )
+
+target_link_libraries(pkttest
+  ${MISC_LIBRARIES}
+  Threads::Threads
+  )
+
+list(APPEND bchapply_SOURCES
+  bchapply.c
+  bch.c
+  )
+
+add_executable(bchapply
+  ${bchapply_SOURCES}
+  )
+
+
 install(TARGETS direwolf DESTINATION ${INSTALL_BIN_DIR})
 install(TARGETS decode_aprs DESTINATION ${INSTALL_BIN_DIR})
 install(TARGETS text2tt DESTINATION ${INSTALL_BIN_DIR})
@@ -482,6 +513,8 @@ install(TARGETS atest DESTINATION ${INSTALL_BIN_DIR})
 install(TARGETS ttcalc DESTINATION ${INSTALL_BIN_DIR})
 install(TARGETS kissutil DESTINATION ${INSTALL_BIN_DIR})
 install(TARGETS appserver DESTINATION ${INSTALL_BIN_DIR})
+install(TARGETS pkttest DESTINATION ${INSTALL_BIN_DIR})
+install(TARGETS bchapply DESTINATION ${INSTALL_BIN_DIR})
 if(UDEV_FOUND)
   install(TARGETS cm108 DESTINATION ${INSTALL_BIN_DIR})
 endif()

src/atest.c

@@ -280,6 +280,9 @@ int main (int argc, char *argv[])
 	      else if (strcasecmp(optarg, "EAS") == 0) {
 	        B_opt = 23456;	// See special case below.
 	      }
+              else if (strcasecmp(optarg, "EOTD") == 0) {
+                B_opt = 34567;
+              }
 	      else {
 	        B_opt = atoi(optarg);
 	      }
@@ -475,6 +478,12 @@ int main (int argc, char *argv[])
 	  my_audio_config.achan[0].space_freq = 1563;	// Actually 1562.5 - logic 0.
 	  strlcpy (my_audio_config.achan[0].profiles, "D", sizeof(my_audio_config.achan[0].profiles));
 	}
+        else if (my_audio_config.achan[0].baud == 34567) {
+	  my_audio_config.achan[0].modem_type = MODEM_EOTD;
+          my_audio_config.achan[0].baud = 1200;
+          my_audio_config.achan[0].mark_freq = 1200;
+          my_audio_config.achan[0].space_freq = 1800;
+        }
 	else {
 	  my_audio_config.achan[0].modem_type = MODEM_SCRAMBLE;
 	  my_audio_config.achan[0].mark_freq = 0;

src/audio.h

@@ -148,7 +148,7 @@ struct audio_s {
                                 	/* Could all be the same or different. */
 
 
-	    enum modem_t { MODEM_AFSK, MODEM_BASEBAND, MODEM_SCRAMBLE, MODEM_QPSK, MODEM_8PSK, MODEM_OFF, MODEM_16_QAM, MODEM_64_QAM, MODEM_AIS, MODEM_EAS } modem_type;
+	    enum modem_t { MODEM_AFSK, MODEM_BASEBAND, MODEM_SCRAMBLE, MODEM_QPSK, MODEM_8PSK, MODEM_OFF, MODEM_16_QAM, MODEM_64_QAM, MODEM_AIS, MODEM_EAS, MODEM_EOTD } modem_type;
 
 					/* Usual AFSK. */
 					/* Baseband signal. Not used yet. */