#ifndef IOSHT75_INC
#define IOSHT75_INC

typedef union
{ unsigned int i;
  float f;
} value;

enum{TEMP,HUMI};

#define  sNAK        0
#define  sACK        1
                            //adr  command  r/w
#define STATUS_REG_W 0x06   //000   0011    0
#define STATUS_REG_R 0x07   //000   0011    1
#define MEASURE_TEMP 0x03   //000   0001    1
#define MEASURE_HUMI 0x05   //000   0010    1
#define RESET        0x1e   //000   1111    0

int   read_sht75(float *temp_val, float *humi_val);
int   print_sht75(unsigned int num);
void  calc_sth11(float *p_humidity, float *p_temperature);
float calc_dewpoint(float h, float t);

char  s_measure(unsigned char *p_value, unsigned char *p_checksum, unsigned char mode);
char  s_read_statusreg(unsigned char *p_value, unsigned char *p_checksum);
char  s_write_statusreg(unsigned char *p_value);
char  s_softreset(void);

void  s_connectionreset(void);
void  s_transstart(void);
char  s_write_byte(unsigned char arg_value);
char  s_read_byte(unsigned char ack);
char  s_seek_ack(void);
char  s_seek_conversion_end(void);

#endif