AD7730.h

00001 #ifndef AD7730_H
00002 #define AD7730_H
00003 
00004 #include "mbed.h"
00005 
00006 // For now we are using software 
00007 #include "SSPI.h"
00008 
00009 class AD7730{
00010 
00011     public:
00012         AD7730(PinName mosi, PinName miso, PinName sclk, PinName ready, PinName cs);
00013         ~AD7730(void);
00014         
00015         void dump(void);
00016         int readRegistry(int registry);
00017         int writeRegistry(int registry, int value);
00018         int initialize(void);
00019         int systemLowCal(double wgt);
00020         int systemHighCal(double wgt, double fullScale);
00021         int read();
00022         int startConversion(bool wait); 
00023         void setFilter(int SF, bool chop, int filter2);
00024         void setFilterSF(int SF);
00025         void setFilterMode(int mode);
00026         void setFilterChop(int enabled);
00027         void reset(bool fullReset);
00028         int adjustDAC(int direction);
00029         void start(void);
00030         void stop(void);
00031         bool isReady(void);
00032         void interruptRead(void);    
00033         double getHz(void);
00034 
00035     
00036     private:
00037     
00038         SSPI _spi;
00039         DigitalOut _cs;
00040         DigitalIn _readyDig;
00041         DigitalOut _LED3;
00042         InterruptIn *_interruptReady;
00043         PinName  _readyPin;
00044         double _fullScaleWeight;
00045         double _minWeight;
00046         double _maxWeight;
00047         int _lastValue;
00048         bool _continous;
00049         int _frequency;
00050         Timer _tmr;
00051         
00052         //Registry value constants
00053         static const int STATUS_REG = 0;
00054         static const int DATA_REG = 1;
00055         static const int MODE_REG = 2;
00056         static const int FILTER_REG = 3;
00057         static const int DAC_REG = 4;
00058         static const int OFFSET_REG = 5;
00059         static const int GAIN_REG = 6;
00060         static const int TEST_REG = 7;
00061         
00062         //define empty spi command
00063         static const int EMPTY_SPI = 0xFF;
00064         
00065         //internal registries
00066         int _mode;
00067         int _filter;
00068         int _dac;
00069         int _offset;
00070         int _gain;
00071         int _status;
00072         
00073         
00074         //timing variables
00075         Timer _exeTmr;
00076         int _exeTime;
00077         
00078         //error variables
00079         int _exeError;
00080         
00081         //private functions
00082         int internalZeroCal(void);
00083         int internalFullCal(void);    
00084         
00085         
00086 };
00087 
00088 #endif