Add an interface for enabling and disabling TSIP interrupts by turnin…

…g on and off SoftwareSerial as having GPS interrupts during RTTY send seemed to be causing garbled strings.

gaga-1/flight/gaga1/rtty.cpp

@@ -6,6 +6,7 @@
 // Radiometrix NTX2
 
 #include "rtty.h"
+#include "tsip.h"
 
 // These are the digital pins used to control the Radiometrix NTX2
 // module.  TX0/TX1 are for the two tones used for RTTY.
@@ -40,6 +41,8 @@ void rtty_bit(int b) // Send 0 if b is 0, 1 if otherwise
 // rtty_send: sends a null-terminated string via radio to the ground trackers
 void rtty_send( char * s ) // The null-terminated string to transmit
 {
+  tsip_disable();
+
   char c;
   while ( c = *s++ ) {
     int i;
@@ -59,5 +62,7 @@ void rtty_send( char * s ) // The null-terminated string to transmit
 
   // Note that when idling RTTY specifies that it be in the 'mark' state (or 1).  This
   // is achieved by the stop bits that were sent at the end of the last character. 
+
+  tsip_enable();
 }
 

gaga-1/flight/gaga1/tsip.cpp

@@ -60,7 +60,6 @@ void tsip_send( BYTE * packet,  // Packet data to send
     ++i;
     --j;
   }
-  Serial.println();
 }
 
 // tsip_get: return the position structure containing the latest fix
@@ -78,7 +77,7 @@ void tsip_init()
   last.vertical  = 0;
   last.fix       = 0;
 
-  gps.begin(9600);
+  tsip_enable();
 
   // Tell the GPS how to report GPS position and time information.  This will come in
   // automatically and be handled by tsip_handle below.
@@ -119,6 +118,16 @@ void tsip_position( BYTE * packet,  // Pointer to the data inside an 0x4A packet
   COPY_SINGLE(longitude, &packet[4]  )
   COPY_SINGLE(altitude,  &packet[8]  )
   COPY_SINGLE(fix,       &packet[16] )
+
+  Serial.print( "TSIP Position:" );
+  Serial.print( last.latitude, 4 );
+  Serial.print( " " );
+  Serial.print( last.longitude, 4 );
+  Serial.print( " " );
+  Serial.print( last.altitude, 2 );
+  Serial.print( " " );
+  Serial.print( last.fix, 2 );
+  Serial.println();
 }
 
 // tsip_velocity: handle the reported GPS velocity
@@ -147,13 +156,11 @@ void tsip_packet( BYTE * packet,  // The packet data
                   int    length ) // Number of bytes in packet
 {
   BYTE function = packet[0];
-
-  Serial.print( "tsip_packet: " );
-  int i = 0;
-  while ( i < length ) {
-    Serial.print( packet[i], HEX );
-    Serial.print( " " );
-    ++i;
+
+  Serial.print( "TSIP packet: " );
+  for ( int i = 0; i < length; ++i ) {
+      Serial.print( packet[i], HEX );
+      Serial.print( " " );
   }
   Serial.println();
 
@@ -219,3 +226,13 @@ void tsip_handle()
   }
 }
 
+void tsip_enable()
+{
+  gps.begin(9600);
+}
+
+void tsip_disable()
+{
+  gps.end();
+}
+

gaga-1/flight/gaga1/tsip.h

@@ -23,4 +23,7 @@ struct position {
 
 struct position tsip_get();
 
+void tsip_enable();
+void tsip_disable();
+
 #endif // INCLUDED_TSIP