AM2321 Temperature and Humidity Sensor mbed library
Dependents: AM2321_Example mbed_vfd_thermometer
Import programAM2321_Example
AM2321 Temperature and Humidity Sensor mbed library Example
Import library
Public Member Functions |
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AM2321 (PinName sda, PinName scl) | |
Constructor.
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bool | poll () |
Read current temperature and humidity from
AM2321
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float | getTemperature (void) const |
Get last read temperature value.
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float | getHumidity (void) const |
Get last read humidity value.
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AM2321.h
- Committer:
- tomozh
- Date:
- 2014-05-06
- Revision:
- 0:d1c0dbf5e5a6
File content as of revision 0:d1c0dbf5e5a6:
/** * AM2321 (Aosong Guangzhou Electronics) * Temperature and Humidity Sensor mbed library * Last update : 2014/05/06 */ #ifndef __AM2321_H__ #define __AM2321_H__ /** AM2321 (Aosong Guangzhou Electronics) * Temperature and Humidity Sensor mbed library * * Example: * @code * #include "mbed.h" * #include "AM2321.h" * * Serial pc(USBTX, USBRX); // Tx, Rx * AM2321 am2321(p28, p27); // SDA, SCL * * int main() * { * while(1) * { * if(am2321.poll()) * { * pc.printf(":%05u,%.1f,%.1f\n" * , count++ * , am2321.getTemperature() * , am2321.getHumidity() * ); * } * * wait(0.5); * } * } * @endcode */ class AM2321 { private: typedef struct tagRESULT { float temperature; float humidity; }RESULT; public: /** Constructor * @param sda [in] I2C Pin name (SDA) * @param scl [in] I2C Pin name (SCL) */ AM2321(PinName sda, PinName scl); /** Read current temperature and humidity from AM2321 * @return result (true=success) */ bool poll(); /** Get last read temperature value * @return temperature value (degress) */ float getTemperature(void) const; /** Get last read humidity value * @return humidity value (%RH) */ float getHumidity(void) const; private: float getLogicalValue(uint16_t regVal) const; uint16_t calcCRC16(const uint8_t* src, int len) const; I2C _i2c; RESULT _result; }; #endif // __AM2321_H__