NOT_A_PIN is now allowed for the enable pin of a AnalogMultiplexer that has been tied to GND

Author: j54n1n

avr/libraries/AnalogMultiplexer/README.md

@@ -7,7 +7,7 @@ A library to interface with analog multiplexers. Supports 4051, 4052, 4053, and
 #include <AnalogMultiplexer.h>
 
 enum {
-	PIN_EN = 2, // The enable pin of the multiplexer.
+	PIN_EN = 2, // The enable pin of the multiplexer or NOT_A_PIN.
 	PIN_S0 = 3, // Channel selector pin 0.
 	PIN_S1 = 4, // Channel selector pin 1.
 	PIN_S2 = 5, // Channel selector pin 2.

avr/libraries/AnalogMultiplexer/examples/AnalogMultiplexerExample/AnalogMultiplexerExample.ino

@@ -2,7 +2,7 @@
 
 // Selected Arduino pins.
 enum {
-	PIN_EN = 2, // The enable pin of the multiplexer.
+	PIN_EN = 2, // The enable pin of the multiplexer or NOT_A_PIN.
 	PIN_S0 = 3, // Channel selector pin 0.
 	PIN_S1 = 4, // Channel selector pin 1.
 	PIN_S2 = 5, // Channel selector pin 2.

avr/libraries/AnalogMultiplexer/library.properties

@@ -1,5 +1,5 @@
 name=AnalogMultiplexer
-version=1.0.0
+version=1.0.1
 author=Julian Sanin <sanin89julian@gmail.com>
 maintainer=Julian Sanin <sanin89julian@gmail.com>
 sentence=A library to interface with analog multiplexers.

avr/libraries/AnalogMultiplexer/src/AnalogMultiplexer.cpp

@@ -29,15 +29,21 @@
 AnalogMultiplexer::AnalogMultiplexer(uint8_t pinEnable) {
 	_pinEnable = pinEnable;
 	_pinCommon = NOT_A_PIN;
-	/*Arduino*/::pinMode(_pinEnable, OUTPUT);
+	if (NOT_A_PIN != _pinEnable) {
+		/*Arduino*/::pinMode(_pinEnable, OUTPUT);
+	}
 }
 
 void AnalogMultiplexer::enable() {
-	/*Arduino*/::digitalWrite(_pinEnable, LOW);
+	if (NOT_A_PIN != _pinEnable) {
+		/*Arduino*/::digitalWrite(_pinEnable, LOW);
+	}
 }
 
 void AnalogMultiplexer::disable() {
-	/*Arduino*/::digitalWrite(_pinEnable, HIGH);
+	if (NOT_A_PIN != _pinEnable) {
+		/*Arduino*/::digitalWrite(_pinEnable, HIGH);
+	}
 }
 
 void AnalogMultiplexer::pinMode(uint8_t pinCommon, uint8_t mode) {