Fix RSSI bug in duplex mode

ADF7021.cpp

@@ -128,7 +128,14 @@ uint16_t CIO::readRSSI()
   }
 
   SDATA_pin(LOW);
-  SLE_pin(HIGH);
+
+  if (!m_duplex)
+    SLE_pin(HIGH);
+#if defined(DUPLEX)
+  if (m_duplex)
+    SLE2_pin(HIGH);
+#endif
+
   dlybit();
 
   // Read SREAD pin
@@ -144,7 +151,12 @@ uint16_t CIO::readRSSI()
 
   }
 
-  SLE_pin(LOW);
+  if (!m_duplex)
+    SLE_pin(LOW);
+#if defined(DUPLEX)
+  if (m_duplex)
+    SLE2_pin(LOW);
+#endif
 
   // Process RSSI code
   RB_code = RB_word & 0x7f;