File content as of revision 0:38e03f9fa18a:

#ifndef MCP4921_H
#define MCP4921_H

#include "mbed.h"

/**
* The MCP4921 is a single 12 bit DAC.
 The maximum voltage output is limited by the input voltage at V_DD which can go up to about 5.5V.

* Datasheet: http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en020398
*
*/

class Mcp4921
{

public:
    /** Initializes the MCP 4921 DAC with the frequency
    *
    * for exemple:
    *   Mbed        Mcp4921
    * p11: Mosi <--->p4:Sdi
    * p12: Miso No Connected
    * p13: Sck  <--->p3:Sck
    * p14       <--->p2:Cs
    * Vout      <--->p1:Vdd
    * Vout      <--->p6: Vref
    * Gnd       <--->p7:Gnd
    * Gnd       <--->p5:Ldac
    */
    Mcp4921(PinName _mosi,PinName _sck,PinName _cs, int _frequency);

    /** return the frequency use by the Mcp4921
       */
    int getFrequency(void);

    /** Writes a value between 0-4095 to the currently selected DAC output
    * @param dataIntNum a value from 0-4095 to write to the DAC register
    */
    void write(int dataIntNum);

    /** Writes a float value between 0.0-1.0 to the currently selected DAC output
       * @param dataFloat a value from 0.0-1.0 to write to the DAC register
       */
    void write(float dataFloat);
    
     /** Writes a value in mV to the DAC outputs.
    * The output will only be accurate if Vref is set to the appropriate voltage reference scaling factor. 
    * @param millivolt The desired voltage output in millivolts
    */
    void write_mV(int millivolt);

    /**An operator for shorthand write(int)
    */
    void operator=(int dataIntNum);


    /**An operator for shorthand write(float)
    */
    void operator=(float dataFloat);


protected:
//
    void setup(void);
    SPI mySPI;
    DigitalOut myCs;
    int myFrequency;

};

#endif