FM radio / TV tuner

//
//      Class header file RD5807m FM RADIO TUNER IC through i2c-dev + i2c-ch341a-usb in C++  
//
//      Copyright (c)2017-2022 Tóthpál István, istvan@tothpal.eu
//

#include <linux/types.h>


#define RD5807m_BASE_ADDRESS 0b0010000

#define RD5807m_CHIPID_REGISTER 0x00
#define RD5807m_CHIPID 0x5804

#define RD5807m_0x02_REGISTER 0x02
#define RD5807m_CHANNEL_REGISTER 0x03    // Channel/Freq - BAND
#define RD5807m_CHANNEL_MASK    0b1111111111000000    // channel * spacing + 87Mhz // BAND_EU
#define RD5807m_DIRECT_MODE_ON  0b0000000000100000
#define RD5807m_DIRECT_MODE_OFF 0b0000000000000000
#define RD5807m_TUNE_ENABLE     0b0000000000010000
#define RD5807m_TUNE_DISABLE    0b0000000000000000
#define RD5807m_BAND_EU         0b0000000000000000    // 87-108MHz
#define RD5807m_BAND_JAPAN      0b0000000000000100    // 76- 91MHz
#define RD5807m_BAND_WORLDWIDE  0b0000000000001000    // 76-108MHz
#define RD5807m_BAND_EASTEUROPE 0b0000000000001100    // 65- 76MHz or 50-65MHz
#define RD5807m_SPACE_100Khz    0b0000000000000000
#define RD5807m_SPACE_200Khz    0b0000000000000001
#define RD5807m_SPACE_50Khz     0b0000000000000010
#define RD5807m_SPACE_25Khz     0b0000000000000011

#define RD5807m_0x04_REGISTER 0x04
#define RD5807m_0x05_REGISTER 0x05    // Volume
#define RD5807m_I2S_REGISTER 0x06
#define RD5807m_0x07_REGISTER 0x07
#define RD5807m_FREQ_DIRECT_REGISTER 0x08

#define RD5807m_READ_STATUS_REGISTER 0x0A
#define RD5807m_READ_0x0B_REGISTER 0x0B
#define RD5807m_READ_RDSA_REGISTER 0x0C
#define RD5807m_READ_RDSB_REGISTER 0x0D
#define RD5807m_READ_RDSC_REGISTER 0x0E
#define RD5807m_READ_RDSD_REGISTER 0x0F

class rd5807m {
 
  int i2c_line;
  int i2c_address;
  int myfile;
  float frequency;

public:

  //constructor
  rd5807m( int line, int address, float freq );
  // destructor
  ~rd5807m();

  int get_i2c_line();
  int get_i2c_address();

  int isRD5807m();
  int init();
  int tuneto(int band, float freq);
  int seek( int updown );

  __s32 setRegister( __u8 registerid, __u16 data );
  __s32 getRegister( __u8 registerid );
};