Inverse the default rx/tx/err led behaviour and introduce

WITH_LEDS_BLINKING_INVERSE option in MyConfig.

This allows easy inversing of led blink behavior depending on how the
leds were connected.

Introduce hw-macro for digitalWrite used by the LED blinking.

libraries/MySensors/MyConfig.h

@@ -53,7 +53,14 @@
 // but now can be used in any sensor node. Also the LEDs can now be
 // disabled in the gateway.
 
-// #define WITH_LEDS_BLINKING
+//#define WITH_LEDS_BLINKING
+
+// The following setting allows you to inverse the blinking feature WITH_LEDS_BLINKING
+// When WITH_LEDS_BLINKING_INVERSE is enabled LEDSs are normally turned on and switches
+// off when blinking
+
+//#define WITH_LEDS_BLINKING_INVERSE
+
 
 // default LEDs blinking period in milliseconds
 #define DEFAULT_LED_BLINK_PERIOD 300

libraries/MySensors/MyHwATMega328.h

@@ -57,6 +57,8 @@ do { 																\
 
 
 // Define these as macros to save valuable space
+
+#define hw_digitalWrite(__pin, __value) (digitalWrite(__pin, __value))
 #define hw_init() Serial.begin(BAUD_RATE)
 #define hw_watchdogReset() wdt_reset()
 #define hw_reboot() wdt_enable(WDTO_15MS); while (1)

libraries/MySensors/MySensor.cpp

@@ -107,33 +107,33 @@ void MySensor::handleLedsBlinking() {
 	// do the actual blinking
 	if(countRx && countRx != 255) {
 		// switch led on
-		digitalWrite(pinRx, HIGH);
+		hw_digitalWrite(pinRx, LED_ON);
 	}
 	else if(!countRx) {
 		// switching off
-		digitalWrite(pinRx, LOW);
+		hw_digitalWrite(pinRx, LED_OFF);
 	}
 	if(countRx != 255)
 		--countRx;
 
 	if(countTx && countTx != 255) {
 		// switch led on
-		digitalWrite(pinTx, HIGH);
+		hw_digitalWrite(pinTx, LED_ON);
 	}
 	else if(!countTx) {
 		// switching off
-		digitalWrite(pinTx, LOW);
+		hw_digitalWrite(pinTx, LED_OFF);
 	}
 	if(countTx != 255)
 		--countTx;
 
 	if(countErr && countErr != 255) {
 		// switch led on
-		digitalWrite(pinEr, HIGH);
+		hw_digitalWrite(pinEr, LED_ON);
 	}
 	else if(!countErr) {
 		// switching off
-		digitalWrite(pinEr, LOW);
+		hw_digitalWrite(pinEr, LED_OFF);
 	}
 	if(countErr != 255)
 		--countErr;
@@ -179,9 +179,9 @@ void MySensor::begin(void (*_msgCallback)(const MyMessage &), uint8_t _nodeId, b
 	pinMode(pinEr, OUTPUT);
 
 	// Set initial state of leds
-	digitalWrite(pinRx, LOW);
-	digitalWrite(pinTx, LOW);
-	digitalWrite(pinEr, LOW);
+	hw_digitalWrite(pinRx, LED_OFF);
+	hw_digitalWrite(pinTx, LED_OFF);
+	hw_digitalWrite(pinEr, LED_OFF);
 
 	// initialize counters
 	countRx = 0;

libraries/MySensors/MySensor.h

@@ -52,6 +52,14 @@ typedef MyHwATMega328 MyHwDriver;
 #define debug(x,...)
 #endif
 
+#ifdef WITH_LEDS_BLINKING_INVERSE
+#define LED_ON 0x1
+#define LED_OFF 0x0
+#else
+#define LED_ON 0x0
+#define LED_OFF 0x1
+#endif
+
 
 // EEPROM start address for mysensors library data
 #define EEPROM_START 0