micsv89: Initial support for MICSV89

Signed off by: Marc Graham <marc@m2ag.net>

Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/micsv89/micsv89.cxx

@@ -0,0 +1,80 @@
+/*
+ * Author: Marc Graham <marc@m2ag.net>
+ * 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 "micsv89.h"
+
+
+using namespace upm;
+
+MICSV89::MICSV89 (int bus, uint8_t address) {
+	m_name = "micsv89";
+	m_valid = false;
+	m_address = address;
+	i2c = new mraa::I2c(bus);
+	tx_buf[0] = 0x09;
+	tx_buf[1] = 0x00;
+	tx_buf[2] = 0x00;
+}
+
+
+void MICSV89::start()
+{
+	m_valid = false;
+	i2c->address(m_address);
+	i2c->frequency(MRAA_I2C_STD);
+	i2c->write(tx_buf, 3);
+	sleep(1); //Give the device time to make the measurement.
+	i2c->address(m_address);
+	i2c->frequency(MRAA_I2C_STD);
+	i2c->read(rx_buf, 6);
+	m_valid = true;
+}
+
+float MICSV89::co2equ()
+{
+	return ((rx_buf[0] - 13) * (1600/229) + 400);
+}
+
+int MICSV89::vocshort()
+{
+	return rx_buf[1];
+}
+
+float MICSV89::tvoc()
+{
+	return rx_buf[2] * (1000/229);
+}
+
+float MICSV89::resistor()
+{
+	return 10 * (rx_buf[3] + (256 * rx_buf[4]) + (65536 * rx_buf[5]));
+}
+
+MICSV89::~MICSV89 () {
+	delete i2c;
+}
+
+