From 3aafb2f5bf997ec56c28619f2c432e02c275edc1 Mon Sep 17 00:00:00 2001
From: jgromes <jgromes@users.noreply.github.com>
Date: Thu, 18 Jun 2020 16:32:11 +0200
Subject: [PATCH] [CC1101] Implemented RF switch control

---
 src/modules/CC1101/CC1101.cpp | 10 ++++++++++
 src/modules/CC1101/CC1101.h   | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/modules/CC1101/CC1101.cpp b/src/modules/CC1101/CC1101.cpp
index 2854fca8..2e3f4dea 100644
--- a/src/modules/CC1101/CC1101.cpp
+++ b/src/modules/CC1101/CC1101.cpp
@@ -232,6 +232,9 @@ int16_t CC1101::startTransmit(uint8_t* data, size_t len, uint8_t addr) {
   // write packet to FIFO
   SPIwriteRegisterBurst(CC1101_REG_FIFO, data, len);
 
+  // set RF switch (if present)
+  _mod->setRfSwitchState(true);
+
   // set mode to transmit
   SPIsendCommand(CC1101_CMD_TX);
 
@@ -249,6 +252,9 @@ int16_t CC1101::startReceive() {
   int state = SPIsetRegValue(CC1101_REG_IOCFG0, CC1101_GDOX_SYNC_WORD_SENT_OR_RECEIVED);
   RADIOLIB_ASSERT(state);
 
+  // set RF switch (if present)
+  _mod->setRfSwitchState(false);
+
   // set mode to receive
   SPIsendCommand(CC1101_CMD_RX);
 
@@ -710,6 +716,10 @@ int16_t CC1101::setEncoding(uint8_t encoding) {
   }
 }
 
+void CC1101::setRfSwitchPins(RADIOLIB_PIN_TYPE rxEn, RADIOLIB_PIN_TYPE txEn) {
+  _mod->setRfSwitchPins(rxEn, txEn);
+}
+
 int16_t CC1101::config() {
   // Reset the radio. Registers may be dirty from previous usage.
   SPIsendCommand(CC1101_CMD_RESET);
diff --git a/src/modules/CC1101/CC1101.h b/src/modules/CC1101/CC1101.h
index d6cfe45c..0ef0df29 100644
--- a/src/modules/CC1101/CC1101.h
+++ b/src/modules/CC1101/CC1101.h
@@ -864,6 +864,16 @@ class CC1101: public PhysicalLayer {
     */
     int16_t setEncoding(uint8_t encoding);
 
+    /*!
+      \brief Some modules contain external RF switch controlled by two pins. This function gives RadioLib control over those two pins to automatically switch Rx and Tx state.
+      When using automatic RF switch control, DO NOT change the pin mode of rxEn or txEn from Arduino sketch!
+
+      \param rxEn RX enable pin.
+
+      \param txEn TX enable pin.
+    */
+    void setRfSwitchPins(RADIOLIB_PIN_TYPE rxEn, RADIOLIB_PIN_TYPE txEn);
+
 #ifndef RADIOLIB_GODMODE
   private:
 #endif