mpr121: Initial implementation

This module implements support for the Grove I2C touch sensor
(mpr121).

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Zion Orent <zorent@ics.com>
Signed-off-by: John Van Drasek <john.r.van.drasek@intel.com>

examples/CMakeLists.txt

@@ -65,6 +65,7 @@ add_executable (grovevdiv-example grovevdiv.cxx)
 add_executable (grovewater-example grovewater.cxx)
 add_executable (guvas12d-example guvas12d.cxx)
 add_executable (groveloudness-example groveloudness.cxx)
+add_executable (mpr121-example mpr121.cxx)
 
 include_directories (${PROJECT_SOURCE_DIR}/src/hmc5883l)
 include_directories (${PROJECT_SOURCE_DIR}/src/grove)
@@ -117,6 +118,7 @@ include_directories (${PROJECT_SOURCE_DIR}/src/grovevdiv)
 include_directories (${PROJECT_SOURCE_DIR}/src/grovewater)
 include_directories (${PROJECT_SOURCE_DIR}/src/guvas12d)
 include_directories (${PROJECT_SOURCE_DIR}/src/groveloudness)
+include_directories (${PROJECT_SOURCE_DIR}/src/mpr121)
 
 target_link_libraries (hmc5883l-example hmc5883l ${CMAKE_THREAD_LIBS_INIT})
 target_link_libraries (groveled-example grove ${CMAKE_THREAD_LIBS_INIT})
@@ -185,3 +187,4 @@ target_link_libraries (grovevdiv-example grovevdiv ${CMAKE_THREAD_LIBS_INIT})
 target_link_libraries (grovewater-example grovewater ${CMAKE_THREAD_LIBS_INIT})
 target_link_libraries (guvas12d-example guvas12d ${CMAKE_THREAD_LIBS_INIT})
 target_link_libraries (groveloudness-example groveloudness ${CMAKE_THREAD_LIBS_INIT})
+target_link_libraries (mpr121-example mpr121 ${CMAKE_THREAD_LIBS_INIT})

examples/javascript/mpr121.js

@@ -0,0 +1,69 @@
+/*jslint node:true, vars:true, bitwise:true, unparam:true */
+/*jshint unused:true */
+/*global */
+/*
+* Author: Zion Orent <zorent@ics.com>
+* Copyright (c) 2014 Intel Corporation.
+*
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to deal in the Software without restriction, including
+* without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to
+* permit persons to whom the Software is furnished to do so, subject to
+* the following conditions:
+*
+* The above copyright notice and this permission notice shall be
+* included in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+var touchSensor = require('jsupm_mpr121');
+
+var myTouchSensor = new touchSensor.MPR121(touchSensor.MPR121_I2C_BUS, touchSensor.MPR121_DEFAULT_I2C_ADDR);
+
+myTouchSensor.configAN3944();
+
+setInterval(function()
+{
+	myTouchSensor.readButtons();
+	printButtons(myTouchSensor);
+}, 1000);
+
+function printButtons(touchSensor)
+{
+	var buttonPressed = false;
+
+	var outputStr = "Buttons Pressed: ";
+	for (var i=0; i<12; i++)
+	{
+		if (touchSensor.m_buttonStates & (1 << i))
+		{
+			outputStr += (i + " ");
+			buttonPressed = true;
+		}
+	}
+
+	if (!buttonPressed)
+		outputStr += "None";
+
+	console.log(outputStr);
+
+	if (touchSensor.m_overCurrentFault)
+		console.log("Over Current Fault detected!");
+}
+
+// Print message when exiting
+process.on('SIGINT', function()
+{
+	console.log("Exiting...");
+	process.exit(0);
+});
+

examples/mpr121.cxx

@@ -0,0 +1,88 @@
+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ * Copyright (c) 2014 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <unistd.h>
+#include <signal.h>
+#include <iostream>
+#include "mpr121.h"
+
+using namespace std;
+
+int shouldRun = true;
+
+void sig_handler(int signo)
+{
+  if (signo == SIGINT)
+    shouldRun = false;
+}
+
+void printButtons(upm::MPR121 *touch)
+{
+  bool buttonPressed = false;
+
+  cout << "Buttons Pressed: ";
+  for (int i=0; i<12; i++)
+    {
+      if (touch->m_buttonStates & (1 << i))
+        {
+          cout << i << " ";
+          buttonPressed = true;
+        }
+    }
+
+  if (!buttonPressed)
+    cout << "None";
+
+  if (touch->m_overCurrentFault)
+    cout << "Over Current Fault detected!" << endl;
+
+  cout << endl;
+}
+
+int main(int argc, char **argv)
+{
+  signal(SIGINT, sig_handler);
+
+//! [Interesting]
+  // Instantiate an MPR121 on I2C bus 0
+
+  upm::MPR121 *touch = new upm::MPR121(MPR121_I2C_BUS, MPR121_DEFAULT_I2C_ADDR);
+
+  // init according to AN3944 defaults
+  touch->configAN3944();
+
+  while (shouldRun)
+    {
+      touch->readButtons();
+      printButtons(touch);
+      sleep(1);
+    }
+
+//! [Interesting]
+
+  cout << "Exiting..." << endl;
+
+  delete touch;
+  return 0;
+}