max30100: Initial commit - MAX30100 pulse oximeter

* c/c++ source
    * java/js/python/c/c++ examples
    * Doc image (png)
    * Tested on Intel Edison
    * TODO: Tuning for SpO2 reading

Signed-off-by: Noel Eck <noel.eck@intel.com>

src/max30100/max30100_fti.c

@@ -0,0 +1,109 @@
+/*
+ * Author: Noel Eck <noel.eck@intel.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 <string.h>
+#include <stdlib.h>
+
+#include "max30100.h"
+#include "upm_fti.h"
+#include "fti/upm_sensor.h"
+
+/** 
+ * This file implements the Function Table Interface (FTI) for this sensor
+ */
+
+const char upm_max30100_name[] = "MAX30100";
+const char upm_max30100_description[] = "Pulse oximeter and heart-rate sensor";
+const upm_protocol_t upm_max30100_protocol[] = {UPM_I2C};
+/* TODO: Add/implement heart rate and SpO2 categories */
+const upm_sensor_t upm_max30100_category[] = {UPM_TEMPERATURE};
+
+// forward declarations
+const void* upm_max30100_get_ft(upm_sensor_t sensor_type);
+void* upm_max30100_init_str(const char* protocol, const char* params);
+void upm_max30100_close(void* dev);
+const upm_sensor_descriptor_t upm_max30100_get_descriptor();
+upm_result_t upm_max30100_get_temperature(void* dev, float *value, upm_temperature_u unit);
+
+/* This sensor implementes 2 function tables */
+/* 1. Generic base function table */
+static const upm_sensor_ft ft_gen =
+{
+    .upm_sensor_init_name = &upm_max30100_init_str,
+    .upm_sensor_close = &upm_max30100_close,
+    .upm_sensor_get_descriptor = &upm_max30100_get_descriptor
+};
+
+/* 2. Temperatur function table */
+static const upm_temperature_ft ft_temperature =
+{
+    .upm_temperature_set_offset = NULL,
+    .upm_temperature_set_scale = NULL,
+    .upm_temperature_get_value = &upm_max30100_get_temperature
+};
+
+const void* upm_max30100_get_ft(upm_sensor_t sensor_type)
+{
+    switch(sensor_type)
+    {
+        case UPM_SENSOR:
+            return &ft_gen;
+        case UPM_TEMPERATURE:
+            return &ft_temperature;
+        default:
+            return NULL;
+    }
+}
+
+void* upm_max30100_init_str(const char* protocol, const char* params)
+{
+    fprintf(stderr,
+            "String initialization - not implemented, using i2c bus 0: %s\n", __FILENAME__);
+    return max30100_init(0);
+}
+
+void upm_max30100_close(void* dev)
+{
+    max30100_close(dev);
+}
+
+const upm_sensor_descriptor_t upm_max30100_get_descriptor()
+{
+    /* Fill in the descriptor */
+    upm_sensor_descriptor_t usd;
+    usd.name = upm_max30100_name;
+    usd.description = upm_max30100_description;
+    usd.protocol_size = 1;
+    usd.protocol = upm_max30100_protocol;
+    usd.category_size = 2;
+    usd.category = upm_max30100_category;
+
+    return usd;
+}
+
+upm_result_t upm_max30100_get_temperature(void* dev, float *value, upm_temperature_u unit)
+{
+    upm_result_t result = max30100_get_temperature((max30100_context*)dev, value);
+    return result;
+}