mma7660: C implementation; FTI; C++ wraps C

Signed-off-by: Jon Trulson <jtrulson@ics.com>

examples/c/CMakeLists.txt

@@ -130,6 +130,7 @@ add_example (rpr220)
 add_example (md)
 add_example (linefinder)
 add_example (uln200xa)
+add_example (mma7660)
 
 # Custom examples
 add_custom_example (nmea_gps_i2c-example-c nmea_gps_i2c.c nmea_gps)

examples/c/mma7660.c

@@ -0,0 +1,83 @@
+/*
+ * 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 <stdlib.h>
+#include <stdio.h>
+#include <signal.h>
+
+#include "upm_utilities.h"
+#include "mma7660.h"
+
+int shouldRun = true;
+
+void sig_handler(int signo)
+{
+    if (signo == SIGINT)
+        shouldRun = false;
+}
+
+int main(int argc, char **argv)
+{
+    signal(SIGINT, sig_handler);
+
+//! [Interesting]
+    // Instantiate an MMA7660 on I2C bus 0
+
+    mma7660_context accel = mma7660_init(MMA7660_DEFAULT_I2C_BUS,
+                                         MMA7660_DEFAULT_I2C_ADDR);
+
+    if (!accel)
+    {
+        printf("mma7660_init() failed\n");
+        return 1;
+    }
+
+    // place device in standby mode so we can write registers
+    mma7660_set_mode_standby(accel);
+
+    // enable 64 samples per second
+    mma7660_set_sample_rate(accel, MMA7660_AUTOSLEEP_64);
+
+    // place device into active mode
+    mma7660_set_mode_active(accel);
+
+    while (shouldRun)
+    {
+        float ax, ay, az;
+
+        mma7660_get_acceleration(accel, &ax, &ay, &az);
+        printf("Acceleration: x = %f y = %f z = %f\n\n",
+               ax, ay, az);
+
+        upm_delay_ms(500);
+    }
+
+    printf("Exiting...\n");
+
+    mma7660_close(accel);
+
+//! [Interesting]
+    return 0;
+}