update examples

examples/AFSK_PacketTester/AFSK_PacketTester.ino

@@ -50,6 +50,7 @@ void setup() {
   radio.initialize();
   radio.frequency(144390);
   radio.setRfPower(0);
+  radio.bypassPreDeEmph(); // needed for digital modes
   dds.start();
   afsk.start(&dds);
   delay(100);

examples/AFSK_SerialMessenger/AFSK_SerialMessenger.ino

@@ -8,8 +8,11 @@
  * a message under 254 characters into the bar at the top of 
  * the monitor. Click the "Send" button. Check for output on 
  * AFSK receiver.
-
+ *
- *  NOTE: add message receive code
+ * To send a message: connect to the Arduino over a Serial link.
+ * Send the following over the serial link:
+ * `from,to,:message
+ * example: * `KG7OGM,KG7OGM,:Hi there
  */
 
 
@@ -55,6 +58,7 @@ void setup() {
   radio.setSQHiThresh(-100);
   radio.setSQLoThresh(-100);
   radio.setSQOn();
+  radio.bypassPreDeEmph();
   dds.start();
   afsk.start(&dds);
   delay(100);

examples/AX25Receive/AX25Receive.ino

@@ -54,6 +54,7 @@ void setup() {
   Serial.print(F(" / "));
   Serial.println(radio.getSQLoThresh());
   radio.setModeReceive();
+  radio.bypassPreDeEmph(); // needed for digital modes
   Serial.println(F("DDS Start"));
   delay(100);
   dds.start();

examples/DTMF/DTMF.ino

@@ -139,11 +139,13 @@ void loop() {
 
       if (Serial.available()) {
         code = char2code(Serial.read());
+        if (code == 255) code = 0xE; // throw a * in there so we don't break things with an invalid code
         radio.setDTMFCode(code); // set first
       } else {
         dtmf_to_tx = false;
       }
     }
+    delay(20); // make sure the last code is done
     // done with tone
     radio.setModeReceive();
     radio.setTxSourceMic();

examples/KISS/KISS.ino

@@ -56,6 +56,7 @@ void setup() {
   radio.setSQLoThresh(-100);
   radio.setSQOn();
   radio.frequency(144390);
+  radio.bypassPreDeEmph();
 
   dds.start();
   afsk.start(&dds);

examples/SSTV/SSTV.ino

@@ -44,6 +44,7 @@ void setup() {
   Serial.println(result);
   radio.initialize();
   radio.frequency(446000);
+  radio.bypassPreDeEmph();
   radio.setModeReceive();
 }
 

examples/SSTV_M1_Static/SSTV_M1_Static.ino

@@ -54,6 +54,7 @@ void setup() {
   radio.initialize();
   radio.setRfPower(0);
   radio.frequency(145500);
+  radio.bypassPreDeEmph();
   // put your setup code here, to run once:
   //dds.setReferenceClock(34965/4);
   dds.start();