KT0915.h

00001 #ifndef __KT0915_H
00002 #define __KT0915_H
00003 
00004 #include "mbed.h"
00005 
00006 #define KT0915_address 0x6A
00007 
00008 /** Library for KT0915
00009 */
00010 class KT0915
00011 {
00012 public:
00013     /** Create a KT0915 instance connected to specified I2C pins
00014         *
00015         * @param sda I2C-bus SDA pin
00016         * @param scl I2C-bus SCL pin
00017         */
00018     KT0915(PinName sda,PinName scl);
00019     /**Initialize KT0915
00020     *
00021     *Set paramaters below
00022     *
00023     *0x02:0b0000000000000111 FM space:100KHz, R/L mute:disable
00024     *
00025     *0x04:0b1110000010010000 FM/AM/device mute:disable, bass:disable DAC cap:60uF
00026     *
00027     *0x05:0b1001100000100000 Mono:enable, de-emphasis:50uF, blend:disable
00028     *
00029     *0x0A:0b0000010000000000 LDO:highest, FM AFC:enable
00030     *
00031     *0x0C:0b0000000000101100 FM wide freq:enable
00032     *
00033     *0x0F:0b1000100000000000 Stanby:disable, volume:0
00034     *
00035     *0x16:0b0000000011000010 Mode:FM, use internal defined band, Audio gain:0dB, AM AFC:enable
00036     *
00037     *0x22:0b1010001011101100 AM AGC fast win:fastest, AM AGC short win:slowest
00038     *
00039     *AM bandwidth:6KHz, AM gain:12dB, Left Inverse Control:enable
00040     *
00041     *0x23:0bxxx111xxxxxxxxxx low th:B
00042     *
00043     *0x2E:0b0010100010001100 softmute:fast, AM softmute start level:0b100
00044     *
00045     *softmute target volume:0b0100, softmute mode:RSSI, FM softmute start threshold:0b100
00046     *
00047     *0x33:0b0101010000000001 AM space:9KHz
00048     *
00049     *0x3F:0bxxxxxxxxx001x011 RF AGC patch
00050     */
00051 
00052     void init(void);
00053 
00054     /**read KT0915_WHO_AM_I
00055     *
00056     *return 0x4B54
00057     */
00058     int getID(void);
00059 
00060     /**set volume
00061     *
00062     *vol...0~31
00063     */
00064     void set_vol(int vol);
00065 
00066     /**set frequency and tune
00067     *
00068     *AM...mode=1, freq=frequency (KHz)
00069     *
00070     *FM...mode=0, freq=100*frequency (MHz)
00071     */
00072     void set_freq(bool mode,int freq);
00073 
00074     /**set xtal frequency
00075     *
00076     *xtal=32,38,12000,24000 (KHz)
00077     *
00078     *If your xtal is 32.768Khz,set to 32.
00079     */
00080     void set_xtal(int xtal);
00081 
00082     /**read RSSI (dB)
00083     *
00084     *AM...mode=0
00085     *
00086     *FM...mode=1
00087     */
00088     int get_rssi(bool mode);
00089 
00090     /**set channel space
00091     *
00092     *AM...mode=0, space=1,9,10 (KHz)
00093     *
00094     *If space=1, bandwidth sets 2KHz.
00095     *
00096     *If space=9 or 10, bandwidth sets 6KHz.
00097     *
00098     *FM...mode=1, space=50,100,200 (KHz)
00099     */
00100     void set_space(bool mode,int space);
00101 
00102     /**read SNR (dB)
00103     *
00104     *for FM only
00105     */
00106     int get_snr(bool mode);
00107 
00108     /**read Chip Ready Indicator
00109     *
00110     *0...Chip is not ready.
00111     *
00112     *1...Chip is ready.
00113     */
00114     bool get_ready(void);
00115 
00116     /**re-cali*/
00117     void cali(void);
00118 
00119 private:
00120     I2C _KT0915;
00121     void write_reg(int memory_address,int byte1,int byte2);
00122     void read_reg(int memory_address,int *byte1,int *byte2);
00123     int data1,data2;
00124 };
00125 
00126 #endif