[PHY] Added finishTransmit

keywords.txt

@@ -86,6 +86,7 @@ setDio1Action	KEYWORD2
 clearDio0Action	KEYWORD2
 clearDio1Action	KEYWORD2
 startTransmit	KEYWORD2
+finishTransmit	KEYWORD2
 startReceive	KEYWORD2
 readData	KEYWORD2
 startChannelScan	KEYWORD2

src/protocols/PhysicalLayer/PhysicalLayer.h

@@ -139,6 +139,13 @@ class PhysicalLayer {
     */
     virtual int16_t startTransmit(uint8_t* data, size_t len, uint8_t addr = 0) = 0;
 
+    /*!
+      \brief Clean up after transmission is done.
+
+      \returns \ref status_codes
+    */
+    virtual int16_t finishTransmit() = 0;
+
     /*!
       \brief Reads data that was received after calling startReceive method.