Merge pull request #54 from PsuFan/master

Add disableInterruptPin()

Author: ladyada

Adafruit_MCP23017.cpp

@@ -295,6 +295,17 @@ void Adafruit_MCP23017::setupInterruptPin(uint8_t pin, uint8_t mode) {
   updateRegisterBit(pin, HIGH, MCP23017_GPINTENA, MCP23017_GPINTENB);
 }
 
+/**
+ * Disable a pin for interrupt.
+ *
+ * @param pin Pin to set
+ *
+ */
+void Adafruit_MCP23017::disableInterruptPin(uint8_t pin) {
+  // disable the pin for interrupt
+  updateRegisterBit(pin, LOW, MCP23017_GPINTENA, MCP23017_GPINTENB);
+}
+
 /*!
  * @brief Gets the last interrupt pin
  * @return Returns the last interrupt pin

Adafruit_MCP23017.h

@@ -36,7 +36,8 @@ class Adafruit_MCP23017 {
   uint8_t readGPIO(uint8_t b);
 
   void setupInterrupts(uint8_t mirroring, uint8_t open, uint8_t polarity);
-  void setupInterruptPin(uint8_t p, uint8_t mode);
+  void setupInterruptPin(uint8_t pin, uint8_t mode);
+  void disableInterruptPin(uint8_t pin);
   uint8_t getLastInterruptPin();
   uint8_t getLastInterruptPinValue();