Extract common bit reflection methods

src/Module.cpp

@@ -398,6 +398,21 @@ uint32_t Module::micros() {
   return(::micros());
 }
 
+uint8_t Module::flipBits(uint8_t b) {
+  b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
+  b = (b & 0xCC) >> 2 | (b & 0x33) << 2;
+  b = (b & 0xAA) >> 1 | (b & 0x55) << 1;
+  return b;
+}
+
+uint16_t Module::flipBits16(uint16_t i) {
+  i = (i & 0xFF00) >> 8 | (i & 0x00FF) << 8;
+  i = (i & 0xF0F0) >> 4 | (i & 0x0F0F) << 4;
+  i = (i & 0xCCCC) >> 2 | (i & 0x3333) << 2;
+  i = (i & 0xAAAA) >> 1 | (i & 0x5555) << 1;
+  return i;
+}
+
 void Module::setRfSwitchPins(RADIOLIB_PIN_TYPE rxEn, RADIOLIB_PIN_TYPE txEn) {
   _useRfSwitch = true;
   _rxEn = rxEn;

src/Module.h

@@ -468,6 +468,16 @@ class Module {
     */
     static uint32_t micros();
 
+    /*!
+      \brief Function to reflect bits within a byte.
+    */
+    static uint8_t flipBits(uint8_t b);
+
+    /*!
+      \brief Function to reflect bits within an integer.
+    */
+    static uint16_t flipBits16(uint16_t i);
+
 #ifndef RADIOLIB_GODMODE
   private:
 #endif

src/protocols/AX25/AX25.cpp

@@ -283,7 +283,7 @@ int16_t AX25Client::sendFrame(AX25Frame* frame) {
 
   // flip bit order
   for(size_t i = 0; i < frameBuffLen; i++) {
-    frameBuff[i] = flipBits(frameBuff[i]);
+    frameBuff[i] = Module::flipBits(frameBuff[i]);
   }
 
   // calculate FCS
@@ -441,22 +441,7 @@ uint16_t AX25Client::getFrameCheckSequence(uint8_t* buff, size_t len) {
     }
   }
 
-  return(flipBits16(~shiftReg));
+  return(Module::flipBits16(~shiftReg));
-}
-
-uint8_t AX25Client::flipBits(uint8_t b) {
-  b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
-  b = (b & 0xCC) >> 2 | (b & 0x33) << 2;
-  b = (b & 0xAA) >> 1 | (b & 0x55) << 1;
-  return b;
-}
-
-uint16_t AX25Client::flipBits16(uint16_t i) {
-  i = (i & 0xFF00) >> 8 | (i & 0x00FF) << 8;
-  i = (i & 0xF0F0) >> 4 | (i & 0x0F0F) << 4;
-  i = (i & 0xCCCC) >> 2 | (i & 0x3333) << 2;
-  i = (i & 0xAAAA) >> 1 | (i & 0x5555) << 1;
-  return i;
 }
 
 #endif

src/protocols/AX25/AX25.h

@@ -344,8 +344,6 @@ class AX25Client {
     uint16_t _preambleLen = 0;
 
     static uint16_t getFrameCheckSequence(uint8_t* buff, size_t len);
-    static uint8_t flipBits(uint8_t b);
-    static uint16_t flipBits16(uint16_t i);
 };
 
 #endif