grove: add callback to GroveButton

Signed-off-by: Petre Eftime <petre.p.eftime@intel.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/grove/grove.cxx

@@ -277,3 +277,26 @@ int GroveButton::value()
 {
     return mraa_gpio_read(m_gpio);
 }
+
+#ifdef JAVACALLBACK
+void GroveButton::installISR(mraa::Edge level, IsrCallback *cb)
+{
+  installISR(level, generic_callback_isr, cb);
+}
+#endif
+
+void GroveButton::installISR(mraa::Edge level, void (*isr)(void *), void *arg)
+{
+  if (m_isrInstalled)
+    uninstallISR();
+
+  // install our interrupt handler
+  mraa_gpio_isr(m_gpio, (mraa_gpio_edge_t) level, isr, arg);
+  m_isrInstalled = true;
+}
+
+void GroveButton::uninstallISR()
+{
+  mraa_gpio_isr_exit(m_gpio);
+  m_isrInstalled = false;
+}

src/grove/grove.h

@@ -26,8 +26,12 @@
 #pragma once
 
 #include <string>
-#include <mraa/aio.h>
-#include <mraa/gpio.h>
+#include <mraa/aio.hpp>
+#include <mraa/gpio.hpp>
+
+#ifdef JAVACALLBACK
+#include "../IsrCallback.h"
+#endif
 
 namespace upm {
 
@@ -378,7 +382,31 @@ class GroveButton: public Grove {
          * @return Value from the GPIO pin
          */
         int value();
+
+        /**
+         * Installs an interrupt service routine (ISR) to be called when
+         * the button is activated or deactivated.
+         *
+         * @param fptr Pointer to a function to be called on interrupt
+         * @param arg Pointer to an object to be supplied as an
+         * argument to the ISR.
+         */
+#if defined(SWIGJAVA) || defined(JAVACALLBACK)
+        void installISR(mraa::Edge level, IsrCallback *cb);
+#else
+        void installISR(mraa::Edge level, void (*isr)(void *), void *arg);
+#endif
+        /**
+         * Uninstalls the previously installed ISR
+         *
+         */
+        void uninstallISR();
+
     private:
+#if defined(SWIGJAVA) || defined(JAVACALLBACK)
+        void installISR(mraa::Edge level, void (*isr)(void *), void *arg);
+#endif
+        bool m_isrInstalled;
         std::string m_name;
         mraa_gpio_context m_gpio;
 };

src/grove/javaupm_grove.i

@@ -1,6 +1,14 @@
-%module javaupm_grove
+%module (directors="1", docstring="Basic Grove sensors") javaupm_grove
+
 %include "../upm.i"
 
+%feature("director") IsrCallback;
+
+%ignore generic_callback_isr;
+%include "../IsrCallback.h"
+
+%apply int {mraa::Edge}
+
 %{
     #include "grove.h"
 %}