Diff: BMP280.h

Revision:

5:7139d5accbc3

Parent:

4:ddcaa259e65b

Child:

6:d03826fe1062

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BMP280.h	Wed Apr 13 07:19:00 2016 +0000
@@ -0,0 +1,101 @@
+/**
+ *  BME280 Combined humidity and pressure sensor library
+ *
+ *  @author  Toyomasa Watarai
+ *  @version 1.0
+ *  @date    06-April-2015
+ *
+ *  Library for "BME280 temperature, humidity and pressure sensor module" from Switch Science
+ *    https://www.switch-science.com/catalog/2236/
+ *
+ *  For more information about the BME280:
+ *    http://ae-bst.resource.bosch.com/media/products/dokumente/bme280/BST-BME280_DS001-10.pdf
+ */
+ 
+#ifndef MBED_BMP280_H
+#define MBED_BMP280_H
+
+#include "mbed.h"
+
+//#define _DEBUG
+#define DEFAULT_SLAVE_ADDRESS (0x76 << 1)
+
+#ifdef _DEBUG
+extern Serial pc;
+#define DEBUG_PRINT(...) pc.printf(__VA_ARGS__)
+#else
+#define DEBUG_PRINT(...)
+#endif
+
+ 
+/** BME280 class
+ *
+ *  BME280: A library to correct environmental data using Boshe BME280 device
+ *
+ *  BME280 is an environmental sensor
+ *  @endcode
+ */
+ 
+class BME280
+{
+public:
+
+    /** Create a BME280 instance
+     *  which is connected to specified I2C pins with specified address
+     *
+     * @param sda I2C-bus SDA pin
+     * @param scl I2C-bus SCL pin
+     * @param slave_adr (option) I2C-bus address (default: 0x76)
+     */
+    BME280(PinName sda, PinName sck, char slave_adr = DEFAULT_SLAVE_ADDRESS);
+
+    /** Create a BME280 instance
+     *  which is connected to specified I2C pins with specified address
+     *
+     * @param i2c_obj I2C object (instance)
+     * @param slave_adr (option) I2C-bus address (default: 0x76)
+     */
+    BME280(I2C &i2c_obj, char slave_adr = DEFAULT_SLAVE_ADDRESS);
+
+    /** Destructor of BME280
+     */
+    virtual ~BME280();
+
+    /** Initializa BME280 sensor
+     *
+     *  Configure sensor setting and read parameters for calibration
+     *
+     */
+    void initialize(void);
+
+    /** Read the current temperature value (degree Celsius) from BME280 sensor
+     *
+     */
+    float getTemperature(void);
+
+    /** Read the current pressure value (hectopascal)from BME280 sensor
+     *
+     */
+    float getPressure(void);
+
+    /** Read the current humidity value (humidity %) from BME280 sensor
+     *
+     */
+    float getHumidity(void);
+
+private:
+
+    I2C         *i2c_p;
+    I2C         &i2c;
+    char        address;
+    uint16_t    dig_T1;
+    int16_t     dig_T2, dig_T3;
+    uint16_t    dig_P1;
+    int16_t     dig_P2, dig_P3, dig_P4, dig_P5, dig_P6, dig_P7, dig_P8, dig_P9;
+    uint16_t    dig_H1, dig_H3;
+    int16_t     dig_H2, dig_H4, dig_H5, dig_H6;
+    int32_t     t_fine;
+
+};
+
+#endif // MBED_BME280_H