a
Dependents: FM_integration_off
Fork of MPL3115A2 by
Pressure.h@3:7c7c1ea6fc33, 2014-04-02 (annotated)
- Committer:
- sophtware
- Date:
- Wed Apr 02 12:59:44 2014 +0000
- Revision:
- 3:7c7c1ea6fc33
- Parent:
- 0:beb43bc3d6d4
Updated documentation.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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sophtware | 0:beb43bc3d6d4 | 1 | /* |
sophtware | 0:beb43bc3d6d4 | 2 | MPL3115A2 Barometric Pressure and Tempurature Sensor Library |
sophtware | 0:beb43bc3d6d4 | 3 | By: Michael Lange |
sophtware | 0:beb43bc3d6d4 | 4 | Date: March 31, 2014 |
sophtware | 0:beb43bc3d6d4 | 5 | License: This code is public domain. |
sophtware | 0:beb43bc3d6d4 | 6 | |
sophtware | 0:beb43bc3d6d4 | 7 | This class encapsulates a pressure reading from the sensor. |
sophtware | 0:beb43bc3d6d4 | 8 | |
sophtware | 0:beb43bc3d6d4 | 9 | */ |
sophtware | 0:beb43bc3d6d4 | 10 | |
sophtware | 0:beb43bc3d6d4 | 11 | |
sophtware | 0:beb43bc3d6d4 | 12 | #ifndef PRESSURE_H |
sophtware | 0:beb43bc3d6d4 | 13 | #define PRESSURE_H |
sophtware | 0:beb43bc3d6d4 | 14 | |
sophtware | 0:beb43bc3d6d4 | 15 | #include "mbed.h" |
sophtware | 0:beb43bc3d6d4 | 16 | |
sophtware | 3:7c7c1ea6fc33 | 17 | //! Pressure provides a wrapper around barometric data coming from the sensor. The class handles |
sophtware | 3:7c7c1ea6fc33 | 18 | //! working with compressed data from the sensor and provides convenient functions for retreiving |
sophtware | 3:7c7c1ea6fc33 | 19 | //! the data in various units (with room to add more if needed). |
sophtware | 0:beb43bc3d6d4 | 20 | class Pressure |
sophtware | 0:beb43bc3d6d4 | 21 | { |
sophtware | 0:beb43bc3d6d4 | 22 | public: |
sophtware | 0:beb43bc3d6d4 | 23 | |
sophtware | 3:7c7c1ea6fc33 | 24 | //! The size of the compressed data buffer from the sensor. Used in an I2C read. |
sophtware | 0:beb43bc3d6d4 | 25 | static const int size = 3; |
sophtware | 3:7c7c1ea6fc33 | 26 | |
sophtware | 3:7c7c1ea6fc33 | 27 | //! The units we support converting the sensor data to. |
sophtware | 0:beb43bc3d6d4 | 28 | enum unitsType { PASCALS, PSI, INHG, MMHG }; |
sophtware | 0:beb43bc3d6d4 | 29 | |
sophtware | 0:beb43bc3d6d4 | 30 | Pressure(); |
sophtware | 0:beb43bc3d6d4 | 31 | Pressure(float a, unitsType units = PASCALS); |
sophtware | 0:beb43bc3d6d4 | 32 | Pressure(const char* compressed); |
sophtware | 0:beb43bc3d6d4 | 33 | Pressure(const char msb, const char csb, const char lsb); |
sophtware | 0:beb43bc3d6d4 | 34 | |
sophtware | 3:7c7c1ea6fc33 | 35 | //! Allows using the object directly in an I2C read operation. |
sophtware | 0:beb43bc3d6d4 | 36 | operator char*(void) { return _compressed; } |
sophtware | 3:7c7c1ea6fc33 | 37 | //! Same as calling pressure with PASCALS as the parameter. |
sophtware | 0:beb43bc3d6d4 | 38 | operator float(void) { return _pressure; } |
sophtware | 0:beb43bc3d6d4 | 39 | |
sophtware | 0:beb43bc3d6d4 | 40 | float pressure(unitsType units = PASCALS); |
sophtware | 3:7c7c1ea6fc33 | 41 | //! Call to decompress the sensor data after an I2C read. |
sophtware | 0:beb43bc3d6d4 | 42 | void setPressure(); |
sophtware | 0:beb43bc3d6d4 | 43 | void setPressure(const char* compressed); |
sophtware | 0:beb43bc3d6d4 | 44 | void setPressure(const char msb, const char csb, const char lsb); |
sophtware | 0:beb43bc3d6d4 | 45 | void setPressure(float a, unitsType units = PASCALS); |
sophtware | 0:beb43bc3d6d4 | 46 | |
sophtware | 3:7c7c1ea6fc33 | 47 | //! Returns the pressure as a string in the units specified, defaulting to PASCAL if none specified. |
sophtware | 0:beb43bc3d6d4 | 48 | const char* print(unitsType units = PASCALS); |
sophtware | 0:beb43bc3d6d4 | 49 | |
sophtware | 0:beb43bc3d6d4 | 50 | private: |
sophtware | 0:beb43bc3d6d4 | 51 | float _pressure; |
sophtware | 0:beb43bc3d6d4 | 52 | char _compressed[3]; |
sophtware | 0:beb43bc3d6d4 | 53 | char _printBuffer[9]; |
sophtware | 0:beb43bc3d6d4 | 54 | }; |
sophtware | 0:beb43bc3d6d4 | 55 | |
sophtware | 0:beb43bc3d6d4 | 56 | #endif // PRESSURE_H |