ecs1030: added new current sensor (works on atmega328 but on Galileo not accurate, need calibration and circuit)

Signed-off-by: Kiveisha Yevgeniy <yevgeniy.kiveisha@intel.com>

src/ecs1030/ecs1030.h

@@ -0,0 +1,97 @@
+/*
+ * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.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.
+ */
+#pragma once
+
+#include <string>
+#include <math.h>
+#include <mraa/aio.h>
+#include <mraa/gpio.h>
+
+#define NUMBER_OF_SAMPLES  500
+#define ADC_RESOLUTION     1024
+#define SUPPLYVOLTAGE      5100
+#define CURRENT_RATIO      2000.0
+
+#define HIGH               1
+#define LOW                0
+
+#define TRUE               HIGH
+#define FALSE              LOW
+
+namespace upm {
+    class ECS1030 {
+        public:
+            static const uint8_t DELAY_MS  = 20000 / NUMBER_OF_SAMPLES; /* 1/50Hz is 20ms period */
+            static const uint8_t VOLT_M    = 5.1 / 1023;
+            static const uint8_t R_LOAD    = 2000.0 / CURRENT_RATIO;
+
+            /**
+             * Instanciates a ECS1030 (current sensor) object
+             *
+             * @param pinNumber number of the data pin
+             */
+            ECS1030 (uint8_t pinNumber);
+
+            /**
+             * ECS1030 object destructor, basicaly it close the GPIO.
+             */
+            ~ECS1030 ();
+
+            /**
+             * Return currency data for the sampled period
+             */
+            double getCurrency_A ();
+
+            /**
+             * Return power data for the sampled period
+             */
+            double getPower_A ();
+
+            /**
+             * Return currency data for the sampled period
+             */
+            double getCurrency_B ();
+
+            /**
+             * Return power data for the sampled period
+             */
+            double getPower_B ();
+
+            /**
+             * Return name of the component
+             */
+            std::string name() {
+                return m_name;
+            }
+        private:
+            std::string         m_name;
+            mraa_aio_context    m_dataPinCtx;
+
+            double              m_calibration;
+            int                 m_lastSample;
+            double              m_lastFilter;
+            int                 m_sample;
+            double              m_filteredSample;
+    };
+}