[Si443x] Added finishTransmit

examples/Si443x/Si443x_Transmit_Interrupt/Si443x_Transmit_Interrupt.ino

@@ -108,6 +108,11 @@ void loop() {
 
     }
 
+    // clean up after transmission is finished
+    // this will ensure transmitter is disabled,
+    // RF switch is powered down etc.
+    radio.finishTransmit();
+
     // wait a second before transmitting again
     delay(1000);
 

src/modules/Si443x/Si443x.cpp

@@ -87,19 +87,12 @@ int16_t Si443x::transmit(uint8_t* data, size_t len, uint8_t addr) {
   while(_mod->digitalRead(_mod->getIrq())) {
     _mod->yield();
     if(_mod->micros() - start > timeout) {
-      standby();
+      finishTransmit();
-      clearIRQFlags();
       return(RADIOLIB_ERR_TX_TIMEOUT);
     }
   }
 
-  // clear interrupt flags
+  return(finishTransmit());
-  clearIRQFlags();
-
-  // set mode to standby
-  standby();
-
-  return(state);
 }
 
 int16_t Si443x::receive(uint8_t* data, size_t len) {
@@ -258,6 +251,14 @@ int16_t Si443x::startTransmit(uint8_t* data, size_t len, uint8_t addr) {
   return(state);
 }
 
+int16_t Si443x::finishTransmit() {
+  // clear interrupt flags
+  clearIRQFlags();
+
+  // set mode to standby to disable transmitter/RF switch
+  return(standby());
+}
+
 int16_t Si443x::startReceive() {
   // set mode to standby
   int16_t state = standby();

src/modules/Si443x/Si443x.h

@@ -683,6 +683,13 @@ class Si443x: public PhysicalLayer {
     */
     int16_t startTransmit(uint8_t* data, size_t len, uint8_t addr = 0) override;
 
+    /*!
+      \brief Clean up after transmission is done.
+
+      \returns \ref status_codes
+    */
+    int16_t finishTransmit() override;
+
     /*!
       \brief Interrupt-driven receive method. IRQ will be activated when full valid packet is received.