File content as of revision 0:e9068fdddb58:

#ifndef AFE_4404_H
#define AFE_4404_H

#include "mbed.h"

#define LOWER_BYTE_MASK     0x000000FF
#define SIGN_EXT            0xFF000000
#define SIGN_MASK           0x00800000
#define BITS_PER_BYTE       8
#define NUM_REGISTERS       38

class AFE_4404 {
    
    public:
    
        AFE_4404(PinName rxSupplyEn, PinName txSupplyEn, PinName resetz, 
            PinName powerEn, PinName drdy, PinName clk, PinName sda, PinName scl);
        
        void initPorts(void);
        void initPowerSupply(void);
        void initRegisters(void);
        void initClock(void);
        void powerUpSequence(void);
        
        void inline enableWriteMode(void) {
            _writeBuffer[0] = 0x00;    // AFE register address 0x00
            // write 0 to REG_READ bit in register 0x00 to enable readout 
            // of write registers
            _writeBuffer[1] = 0x00;    
            _writeBuffer[2] = 0x00;
            _writeBuffer[3] = 0x00;
            _i2c.write(_address, _writeBuffer, 4);
        }
        
        void inline enableReadMode(void) {
            _writeBuffer[0] = 0x00;    // AFE register address 0x00
            // write 1 to REG_READ bit in register 0x00 to enable writes to 
            // write registers
            _writeBuffer[1] = 0x00;    
            _writeBuffer[2] = 0x00;
            _writeBuffer[3] = 0x01;
            _i2c.write(_address, _writeBuffer, 4);           
        }  
        
        void inline disableIRQ(void) {
            _drdy.disable_irq();
        }

        void inline enableIRQ(void) {
            _drdy.enable_irq();
        }
        
        void getData(void);
        void writeData(uint8_t reg, uint32_t data);
        uint32_t readData(uint8_t reg, bool adc);
        
        
    private:
        DigitalOut  _rxSupplyEn;
        DigitalOut  _txSupplyEn;
        DigitalOut  _resetz;
        DigitalOut  _powerEn;
        
        InterruptIn _drdy;
        PwmOut      _clk;
        I2C         _i2c;
        
        int _address;
        char _writeBuffer[5];
        char _readBuffer[5];
        // temporary variable to prevent multiple allocations
        uint32_t _tempData;
};

#endif