Ci2c.h

#ifndef __CI2C_H__
#define __CI2C_H__

#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <stdint.h>

struct i2cmap_t {
 const char *name;
 uint8_t id;
};

class Ci2c {

private:

 long addr;

protected:

 int f_rw;
 int busn;
 int open_x( uint16_t _busn);

public:

 Ci2c( void) {  this->busn = this->addr = this->f_rw = -1;  }
 Ci2c( Ci2c &_o) {  this->busn = _o.busn;  this->addr = this->f_rw = -1;  }
 virtual ~Ci2c( void) {
   if ( this->f_rw >= 0) close( this->f_rw);
 }
 
 int set_bus( uint16_t _busn);
 int set_bus( const char *_buss, i2cmap_t *_map = NULL);
 int cur_bus( void) {  return( this->busn);  }

 virtual int R1b( uint16_t _addr, uint8_t _reg, uint8_t  &_b) = 0;
 virtual int W1b( uint16_t _addr, uint8_t _reg, uint8_t   _b) = 0;
 virtual int R2b( uint16_t _addr, uint8_t _reg, uint16_t &_b) = 0;
 virtual int W2b( uint16_t _addr, uint8_t _reg, uint16_t  _b) = 0;
 // max block size == 32bytes
 virtual int Rbb( uint16_t _addr, uint8_t _reg, uint8_t *_b, uint8_t _blen) = 0;
 virtual int Wbb( uint16_t _addr, uint8_t _reg, uint8_t *_b, uint8_t _blen) = 0;
 // quick type R/W (command-reg is data also)
 virtual int Rqb( uint16_t _addr, uint8_t _reg, uint8_t *_b, uint8_t _blen) = 0;
 virtual int Wqb( uint16_t _addr, uint8_t _reg, uint8_t *_b, uint8_t _blen) = 0;

 // _addr may be 7 or 10 bits
 int set_slave( uint16_t _addr);

 static int find_bus( const char *_sock);

}; // class /

#endif