unify pin naming scheme

examples/FoxHunt/FoxHunt.ino

@@ -15,7 +15,7 @@
 
 #include <HamShield.h>
 
-#define PWM_PIN 3
+#define MIC_PIN 3
 #define RESET_PIN A3
 #define SWITCH_PIN 2
 
@@ -29,8 +29,8 @@ HamShield radio;
 
 void setup() {
   // NOTE: if not using PWM out, it should be held low to avoid tx noise
-  pinMode(PWM_PIN, OUTPUT);
-  digitalWrite(PWM_PIN, LOW);
+  pinMode(MIC_PIN, OUTPUT);
+  digitalWrite(MIC_PIN, LOW);
   
   // prep the switch
   pinMode(SWITCH_PIN, INPUT_PULLUP);
@@ -79,7 +79,7 @@ void loop() {
     radio.setModeTransmit();
 
     // Generate a 600Hz tone for TRANSMITLENGTH time
-    tone(PWM_PIN, 600, TRANSMITLENGTH);
+    tone(MIC_PIN, 600, TRANSMITLENGTH);
     delay(TRANSMITLENGTH);
 
     // Identify the transmitter