File content as of revision 0:ab340864b251:

/* mbed Si4735 Library
 * Brett Wilson and Brett Berry
 * Georgia Tech ECE 4180
 * Ported from ...

 * Arduino Si4735 Library
 * Written by Ryan Owens for SparkFun Electronics
 * 5/17/11
 *
 * This library is for use with the SparkFun Si4735 Shield
 * Released under the 'Buy Me a Beer' license
 * (If we ever meet, you buy me a beer)
 *
 * See the example sketches to learn how to use the library in your code.
*/

#include "mbed.h"

#ifndef Si4735_h
#define Si4735_h

//Assign the radio pin numbers
#define POWER_PIN    8
#define    RADIO_RESET_PIN    9
#define INT_PIN    2

//Define the SPI Pin Numbers
#define DATAOUT 11        //MOSI
#define DATAIN  12        //MISO 
#define SPICLOCK  13    //sck
#define SS 10            //ss

//List of possible modes for the Si4735 Radio
#define AM    0
#define    FM    1
#define SW    2
#define    LW    3


#define NA 0
#define EU 1

#define ON    true
#define OFF    false

#define address_write 34
#define address_read 35

typedef struct _Station {
    char callSign[5];
    char programType[17];
    char programService[9];
    char radioText[65];
    bool newRadioText;
//Metrics signalQuality;
//int frequency
} Station;

typedef struct _Today {
    char year; //The 2-digit year
    char month;
    char day;
    char hour;
    char minute;
} Today;


class Si4735
{
public:
    //This is just a constructor.
    Si4735(PinName sda, PinName scl, PinName RST_, Serial *pc);
    /*
    * Description:
    *    Initializes the Si4735, powers up the radio in the desired mode and limits the bandwidth appropriately.
    *     This function must be called before any other radio command.
    *    The bands are set as follows:
    *    FM - 87.5 - 107.9 MHz
    *    AM - 520 - 1710 kHz
    *    SW - 2300 - 23000 khz
    *    LW - 152 - 279 kHz
    * Parameters:
    *    mode - The desired radio mode. Use AM(0), FM(1), SW(2) or LW(3).
    */
    void begin(char mode);
    /*
    * Description:
    *    Used to send an ascii command string to the radio.
    * Parameters:
    *    myCommand - A null terminated ascii string limited to hexidecimal characters
    *                to be sent to the radio module. Instructions for building commands can be found
    *                in the Si4735 Programmers Guide.
    */
    void sendCommand(char * myCommand);
    /*
    * Description:
    *    Used to to tune the radio to a desired frequency. The library uses the mode indicated in the
    *     begin() function to determine how to set the frequency.
    * Parameters:
    *    frequency - The frequency to tune to, in kHz (or in 10kHz if using FM mode).
    * Returns:
    *    True
    * TODO:
    *     Make the function return true if the tune was successful, else return false.
    */
    bool tuneFrequency(int frequency);
    /*
    * Description:
    *    This function currently does not work!
    * TODO:
    *    Make this function work.
    */
    int getFrequency(void);
    /*
    * Description:
    *    Commands the radio to seek up to the next valid channel. If the top of the band is reached, the seek
    *    will continue from the bottom of the band.
    * Returns:
    *    True
    * TODO:
    *    Make the function return true if a valid channel was found, else return false.
    */
    bool seekUp(void);
    /*
    * Description:
    *    Commands the radio to seek down to the next valid channel. If the bottom of the band is reached, the seek
    *    will continue from the top of the band.
    * Returns:
    *    True
    * TODO:
    *    Make the function return true if a valid channel was found, else return false.
    */
    bool seekDown(void);
    /*
    * Description:
    *    Increasese the volume by 1. If the maximum volume has been reached, no increase will take place.
    */
    void volumeUp(void);
    /*
    * Description:
    *    Decreases the volume by 1. If the minimum volume has been reached, no decrease will take place.
    */
    void volumeDown(void);
    /*
    * Description:
    *    Mutes the audio output
    */
    void mute(void);
    /*
    * Description:
    *    Disables the mute.
    */
    void unmute(void);
    /*
    * Description:
    *    Gets the current status of the radio. Learn more about the status in the Si4735 datasheet.
    * Returns:
    *    The status of the radio.
    */
    char getStatus(void);
    /*
    * Description:
    *    Gets the long response (16 characters) from the radio. Learn more about the long response in the Si4735 datasheet.
    * Parameters:
    *    response - A string for the response from the radio to be stored in.
    */
    void getResponse(char * response);
    /*
    *Description:
    *   Gets RDS/RBDS information fromt the radio. Learn more about the RDS information in the Si4745 datasheet and programming guide.
    * Parameters:
    *    response - A string for the response from the radio to be stored in.
    */
    void getRDS(void);
    /*
    * Description:
    *    Powers down the radio
    */
    void end(void);


    //**********

    void setProperty(int address, int value);
    bool readRDS();
    bool getIntStatus(void);
    bool bitRead(char value, int index);
    void printable_str(char * str, int length);
    void clearRDS(void);
    void setLocale(char locale);
    char getLocale(void);
    void ptystr(char pty);
    void refreshDisplay(int next_stn);
    void getTime(void);



private:
    // Pointer for the SPI bus
    I2C* i2c_;

    Serial *pc;
    // Declare digital out pins
    DigitalOut _RST_;
    /*
    * A variable that is assigned the current mode of the radio (AM, FM, SW or LW)
    */
    char _mode;
    /*
    * A variable the keeps the current volume level.
    */
    char _currentVolume;
    /*
    * Command string that holds the binary command string to be sent to the Si4735.
    */
    char command[9];
    /*
    * Description:
    *    Sends a binary command string to the Si4735.
    * Parameters:
    *    command - Binary command to be sent to the radio.
    *    length - The number of characters in the command string (since it can't be null terminated!)
    * TODO:
    *    Make the command wait for a valid CTS response from the radio before releasing control of the CPU.
    */
    void sendCommand(char * command, int length);
    /*
    * Description:
    *    Sends/Receives a character from the SPI bus.
    * Parameters:
    *    value - The character to be sent to the SPI bus.
    * Returns:
    *    The character read from the SPI bus during the transfer.
    */
    char spiTransfer(char value);


    char _disp[65]; //Radio Text String
    char _ps[9]; //Program Service String
    char _csign[5]; //Call Sign
    bool _ab; //Indicates new radioText
    char _pty[17]; //Program Type String
    char _year; //Contains the month
    char _month; //Contains the year
    char _day; //Contains the day
    char _hour; //Contains the hour
    char _minute; //Contains the minute
    char _locale; //Contains the locale [NA, EU]
    bool _newRadioText; //Indicates that a new RadioText has been received
    Station tuned;
    Today date;
    bool ps_rdy;
    char RadioText[64];
    char ps_prev[9]; //previous ps
    char pty_prev[17];


};

#endif