#ifndef IO_H #define IO_H #define BITN(x) (1<<(x)) void i2c_init (void); void i2c_send_charnl (unsigned char mot); unsigned char i2c_read_char (void); void i2c_start (void); void i2c_end (void); void wait_2v5us (void); void i2c_send (unsigned char reg, unsigned char data); unsigned char i2c_recv ( unsigned char reg); void i2c_dump (unsigned char * tab); #endif