Fixed unused parameter warnings for FastIO.* (appeared on xtensa architectures)

FastIO.cpp

@@ -84,7 +84,8 @@ fio_bit fio_pinToBit(uint8_t pin)
 }
 
 
-void fio_digitalWrite(fio_register pinRegister, fio_bit pinBit, uint8_t value) 
+void fio_digitalWrite(__attribute__((unused)) fio_register pinRegister,
+                      fio_bit pinBit, uint8_t value) 
 {
 #ifdef FIO_FALLBACK
 	digitalWrite(pinBit, value);
@@ -103,11 +104,14 @@ void fio_digitalWrite(fio_register pinRegister, fio_bit pinBit, uint8_t value)
 #endif
 }
 
-int fio_digitalRead(fio_register pinRegister, uint8_t pinBit)
+int fio_digitalRead(__attribute__((unused)) fio_register pinRegister,
+                    uint8_t pinBit)
 {
 #ifdef FIO_FALLBACK
 	return digitalRead (pinBit);
 #else
+int fio_digitalRead(fio_register pinRegister, uint8_t pinBit)
+{
 	if (*pinRegister & pinBit)
    {
       return HIGH;
@@ -116,8 +120,16 @@ int fio_digitalRead(fio_register pinRegister, uint8_t pinBit)
 #endif
 }
 
-void fio_shiftOut (fio_register dataRegister, fio_bit dataBit, 
-                   fio_register clockRegister, fio_bit clockBit, 
+// __attribute__((unused)) is necessary when fio_digitalWrite_XXX falls
+// back to digitalWrite and leaves dataRegister and clockRegister unused.
+// This attribute has no effect when those parameters are actually used.
+//
+// Same goes for the functions following this one
+
+void fio_shiftOut (__attribute__((unused)) fio_register dataRegister,
+                   fio_bit dataBit, 
+                   __attribute__((unused)) fio_register clockRegister,
+                   fio_bit clockBit, 
                    uint8_t value, uint8_t bitOrder)
 {
 	// # disable interrupts
@@ -167,8 +179,10 @@ void fio_shiftOut (fio_register dataRegister, fio_bit dataBit,
 }
 
 
-void fio_shiftOut(fio_register dataRegister, fio_bit dataBit, 
-                  fio_register clockRegister, fio_bit clockBit)
+void fio_shiftOut(__attribute__((unused)) fio_register dataRegister,
+                  fio_bit dataBit, 
+                  __attribute__((unused)) fio_register clockRegister,
+                  fio_bit clockBit)
 {
    ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
    {
@@ -198,11 +212,11 @@ void fio_shiftOut1_init(fio_register shift1Register, fio_bit shift1Bit)
 }
 
 
-void fio_shiftOut1(fio_register shift1Register, fio_bit shift1Bit, uint8_t value, 
-                   bool noLatch)
+void fio_shiftOut1(__attribute__((unused)) fio_register shift1Register,
+                   fio_bit shift1Bit, uint8_t value, bool noLatch)
 {
 	/*
-	 * this function are based on Shif1 protocol developed by Roman Black 
+	 * this function are based on Shift1 protocol developed by Roman Black 
     *    (http://www.romanblack.com/shift1.htm)
 	 *
 	 * test sketches:

FastIO.h

@@ -88,7 +88,7 @@ static __inline__ uint8_t __iCliRetVal(void)
 	noInterrupts();
 	return(1);
 }
-static __inline__ void __iSeiParam(const uint8_t *__s)
+static __inline__ void __iSeiParam(__attribute__((unused)) const uint8_t *__s)
 {
 	interrupts();
 }