HDC1000.h

00001 #ifndef _HDC1000_H_
00002 #define _HDC1000_H_
00003 #include "mbed.h"
00004 /**
00005  * HDC1000 Integrated Low Power Humidity and Temperature Digital Sensor 
00006  * I2C address: 0x40 
00007  */
00008  
00009 #define USE_READY_PIN 1
00010 
00011 class HDC1000 {
00012 public:
00013  /**
00014  *  constructor
00015  *
00016  * @param sda SDA pin
00017  * @param scl SCL pin
00018  * @param rdy Ready pin
00019  * @param addr address of the I2C peripheral
00020  */
00021 #if USE_READY_PIN
00022 HDC1000(PinName sda, PinName scl, PinName rdy, int addr=0x40) ;
00023 #else
00024 HDC1000(PinName sda, PinName scl, int addr=0x40) ;
00025 #endif
00026  
00027 ~HDC1000() ;
00028 
00029 /**
00030  * read Temperature 
00031  * @param NONE
00032  * @returns float Temperature in Celsius degree
00033  */
00034 float    readTemperature(void) ;
00035 
00036 /**
00037  * read Humidity
00038  * @param NONE
00039  * @returns float Humidity in percentage
00040  */
00041 float    readHumidity(void) ;
00042 
00043 /** 
00044  * reset the module
00045  */
00046 void     reset(void) ;
00047 
00048 float    u2f_temp(uint16_t utemp) ;
00049 float    u2f_hume(uint16_t uhume) ;
00050 
00051 /* for mode 0 */
00052 /**
00053  * get Raw Temperature value
00054  * @param NONE
00055  * @reurns Raw Temperature value
00056  */
00057 uint16_t getTemperature(void) ;
00058 
00059 /**
00060  * get Raw Humidity value
00061  * @param NONE
00062  * @returns Raw Humidity value
00063  */
00064 uint16_t getHumidity(void) ;
00065 
00066 /**
00067  * read Temperature and Humidity together (mode==0)
00068  * @param float *temp returns temperature
00069  * @param float *hume returns humidity
00070  */
00071 void     readData(float *temp, float *hume) ;
00072 
00073 /* for mode 1 */
00074 void     getData(uint16_t *temp, uint16_t *hume) ;
00075 
00076 void     setConfig(uint16_t conf) ;
00077 uint16_t getConfig(void) ;
00078 void     setMode(int mode) ;
00079 int      getMode(void) ;
00080 void     setTres(int tres) ;
00081 int      getTres(void) ;
00082 void     setHres(int hres) ;
00083 int      getHres(void) ;
00084 void     getSerialID(uint8_t data[]) ; /* returns 5 bytes ID */
00085 uint16_t getManufactureID(void) ; /* 0x5449 : Texas Instruments */
00086 uint16_t getDeviceID(void) ;      /* 0x1000 */
00087 
00088 float    getTDelay(void) ;
00089 float    getHDelay(void) ;
00090 float    getDelay(void) ;
00091 
00092 private:
00093   I2C m_i2c;
00094 #if USE_READY_PIN
00095   DigitalIn m_rdy ;
00096 #endif
00097   int m_addr;
00098   void readRegs(int addr, uint8_t * data, int len);
00099   void writeRegs(uint8_t * data, int len);
00100 } ;
00101 
00102 #endif /* _HDC1000_H_ */