Diff: Adafruit_SGP30.h

Revision:

0:41a622cdd86d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Adafruit_SGP30.h	Mon Jul 23 09:51:43 2018 +0000
@@ -0,0 +1,68 @@
+/*!
+ * @file Adafruit_SGP30.h
+ *
+ * This is the documentation for Adafruit's SGP30 driver for the
+ * Arduino platform.  It is designed specifically to work with the
+ * Adafruit SGP30 breakout: http://www.adafruit.com/products/3709
+ *
+ * These sensors use I2C to communicate, 2 pins (SCL+SDA) are required
+ * to interface with the breakout.
+ *
+ * Adafruit invests time and resources providing this open source code,
+ * please support Adafruit and open-source hardware by purchasing
+ * products from Adafruit!
+ *
+ * Written by Ladyada for Adafruit Industries.
+ *
+ * BSD license, all text here must be included in any redistribution.
+ *
+*/
+
+#include "mbed.h"
+
+// the i2c address
+#define SGP30_I2CADDR_DEFAULT 0x58     ///< SGP30 has only one I2C address
+
+// commands and constants
+#define SGP30_FEATURESET       0x0020  ///< The required set for this library
+#define SGP30_CRC8_POLYNOMIAL  0x31    ///< Seed for SGP30's CRC polynomial
+#define SGP30_CRC8_INIT        0xFF    ///< Init value for CRC
+#define SGP30_WORD_LEN         2       ///< 2 bytes per word
+
+/**************************************************************************/
+/*!  Class that stores state and functions for interacting with SGP30 Gas Sensor */
+/**************************************************************************/
+class Adafruit_SGP30 {
+ public:
+  Adafruit_SGP30(PinName sda, PinName scl);
+  bool begin();
+  bool IAQinit(void);
+  bool IAQmeasure(void);
+
+  bool getIAQBaseline(uint16_t *eco2_base, uint16_t *tvoc_base);
+  bool setIAQBaseline(uint16_t eco2_base, uint16_t tvoc_base);
+  bool getIAQRaw(uint16_t *H2_raw, uint16_t *Eth_raw);
+
+  /**
+   * The last measurement of the IAQ-calculated Total Volatile Organic Compounds in ppb. This value is set when you call {@link IAQmeasure()}
+   */
+  uint16_t TVOC;
+
+  /**
+   * The last measurement of the IAQ-calculated equivalent CO2 in ppm. This value is set when you call {@link IAQmeasure()}
+   */
+  uint16_t eCO2;
+
+  /**
+   * The 48-bit serial number, this value is set when you call {@link begin()}
+   */
+  uint16_t serialnumber[3];
+ private:
+  I2C _i2c;
+  int _i2caddr;
+
+  void write(uint8_t address, uint8_t *data, uint8_t n);
+  void read(uint8_t address, uint8_t *data, uint8_t n);
+  bool readWordFromCommand(uint8_t command[], uint8_t commandLength, uint16_t delay, uint16_t *readdata = NULL, uint8_t readlen = 0);
+  uint8_t generateCRC(uint8_t data[], uint8_t datalen);
+};