at42qt1070: Initial implementation

This module implementes support for the Grove QTouch sensor.

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/c++/at42qt1070.cxx

@@ -0,0 +1,90 @@
+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ * Copyright (c) 2015 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 "at42qt1070.h"
+
+using namespace std;
+
+int shouldRun = true;
+
+void sig_handler(int signo)
+{
+  if (signo == SIGINT)
+    shouldRun = false;
+}
+
+void printButtons(upm::AT42QT1070 *touch)
+{
+  bool buttonPressed = false;
+  uint8_t buttons = touch->getButtons();
+
+  cout << "Buttons Pressed: ";
+  for (int i=0; i<7; i++)
+    {
+      if (buttons & (1 << i))
+        {
+          cout << i << " ";
+          buttonPressed = true;
+        }
+    }
+
+  if (!buttonPressed)
+    cout << "None";
+
+  cout << endl;
+
+  if (touch->isCalibrating())
+    cout << "Calibration is occurring." << endl;
+
+  if (touch->isOverflowed())
+    cout << "Overflow was detected." << endl;
+}
+
+int main(int argc, char **argv)
+{
+  signal(SIGINT, sig_handler);
+
+//! [Interesting]
+  // Instantiate an AT42QT1070 on I2C bus 0
+
+  upm::AT42QT1070 *touch = new upm::AT42QT1070(AT42QT1070_I2C_BUS, 
+                                               AT42QT1070_DEFAULT_I2C_ADDR);
+
+  while (shouldRun)
+    {
+      touch->updateState();
+      printButtons(touch);
+      usleep(100000);
+    }
+
+//! [Interesting]
+
+  cout << "Exiting..." << endl;
+
+  delete touch;
+  return 0;
+}