TEA5767.h

00001 /*
00002  * Author: Edoardo De Marchi
00003  * Date: 05/10/13
00004  * Notes: Library for TEA5767 radio module
00005 */
00006 
00007 #pragma once 
00008 #include "mbed.h"
00009 
00010 
00011 /** TEA5767 class 
00012  *
00013  */ 
00014 class TEA5767
00015 {
00016 
00017 public:
00018        /** Creates an TEA5767 object connected to the specified I2C object
00019         *
00020         * @param sda  I2C data port
00021         * @param scl  I2C clock port
00022         * @param addr the I2C address of the TEA5767 device
00023         */ 
00024       TEA5767(PinName sda, PinName scl, int addr);
00025        
00026        /** Destroys a TEA5767 object
00027         *
00028         */
00029       ~TEA5767();
00030       
00031        /** Set the band FM
00032         *
00033         * @param valueBand set the band ('e' = EUROPE/US - 'j' = JAPANESE)
00034         */ 
00035       void SetBand(char valueBand);
00036       
00037        /** Set the radio frequency 
00038         *
00039         * @param freq frequency
00040         * @param side side injection mode ('h' = HIGH - 'l' = LOW)
00041         */ 
00042       void SetFrequency(double freq, char side = 'h');
00043            
00044        /** Auto search up frequency 
00045         *
00046         * @param freq frequency
00047         */       
00048       void SearchUp(float freq);
00049 
00050        /** Auto search down frequency
00051         *
00052         * @param freq frequency
00053         */ 
00054       void SearchDown(float freq);
00055       
00056        /** Read the current frequancy
00057         *
00058         * @returns the current frequency
00059         */ 
00060       float FreqCurrent();
00061       
00062        /** Checks if the address exist on an I2C bus 
00063         *
00064         * @returns 0 on success, or non-0 on failure
00065         */ 
00066       int CheckDevice();
00067       
00068        /** Read the signal level of the band
00069         *
00070         * @returns the signal level
00071         */ 
00072       int SignalLevel();
00073 
00074 
00075 private:
00076 
00077        /** Initialization of the device
00078         *
00079         */ 
00080       void Init();
00081       
00082        /** calculation of the high or low side injection 
00083         *
00084         * @param freq the wanted tuning frequency
00085         * @param mode I2C high ('h') or low ('l') side injection
00086         * @returns decimal value of PLL word
00087         */ 
00088       unsigned int SideInjection(float freq, char mode);
00089       
00090        /** Set the 5 address of the device   
00091         *
00092         * @param N      14bits PLL word
00093         * @param data_1 set the bit 7 and 6 of 1st data byte (default value = 0x00)
00094         * @param data_3 set the 3th data byte (default value = 0x10)
00095         * @param data_4 set the 4th data byte (default value = 0x10)
00096         * @param data_5 set the 5th data byte (default value = 0x00)
00097         */ 
00098       void SetData(unsigned int N, char data_1 = 0x00, char data_3 = 0x10, char data_4 = 0x10, char data_5 = 0x00);
00099                
00100        /** Read the 5 address of the device   
00101         *
00102         * @param buf buffer in which the 5 addresses are saved
00103         */ 
00104       void GetData(char* buf);
00105       
00106       char band;
00107       char side;
00108       unsigned int frequency;
00109       I2C i2c;
00110       int addr; 
00111 
00112 };