Add DCD LED control.

AX25Demodulator.cpp

@@ -177,14 +177,12 @@ bool CAX25Demodulator::PLL(bool input)
     float32_t jitter;
     ::arm_fir_f32(&m_pllFilter, &offset, &jitter, 1U);
 
-    if (!m_duplex) {
     float32_t absOffset = adjust;
     if (offset < 0.0F)
       absOffset -= offset;
     else
       absOffset += offset;
     m_pllJitter = iir(absOffset);
-    }
 
     m_pllCount -= jitter / 2.0F;
     m_pllBits = 1U;

AX25RX.cpp

@@ -69,6 +69,7 @@ m_count(0U),
 m_slotTime(30U),
 m_slotCount(0U),
 m_pPersist(128U),
+m_dcd(false),
 m_canTX(false),
 m_x(1U),
 m_a(0xB7U),
@@ -121,7 +122,6 @@ void CAX25RX::samples(q15_t* samples, uint8_t length)
     DEBUG1("Decoder 3 reported");
   }
 
-  if (!m_duplex) {
   m_slotCount += RX_BLOCK_SIZE;
   if (m_slotCount >= m_slotTime) {
     m_slotCount = 0U;
@@ -130,9 +130,21 @@ void CAX25RX::samples(q15_t* samples, uint8_t length)
     bool dcd2 = m_demod2.isDCD();
     bool dcd3 = m_demod3.isDCD();
     
-      if (dcd1 || dcd2 || dcd3)
+    if (dcd1 || dcd2 || dcd3) {
+      if (!m_dcd) {
+        io.setDecode(true);
+        io.setADCDetection(true);
+        m_dcd = true;
+      }
+
       m_canTX = false;
-      else
+    } else {
+      if (m_dcd) {
+        io.setDecode(false);
+        io.setADCDetection(false);
+        m_dcd = false;
+      }
+
       m_canTX = m_pPersist >= rand();
     }
   }

AX25RX.h

@@ -44,6 +44,7 @@ private:
   uint32_t             m_slotTime;
   uint32_t             m_slotCount;
   uint8_t              m_pPersist;
+  bool                 m_dcd;
   bool                 m_canTX;
   uint8_t              m_x;
   uint8_t              m_a;