#include "msp430x14x.h"
#define    data_out     (P1DIR|=0x01)
#define    data_in      (P1DIR&=0xFE)
#define    data_up      (P1OUT|=0x01)
#define    data_down    (P1OUT&=0xFE)
#define    data_h       ((P1IN&0x01)==0x01)
#define    data_l       ((P1IN&0x01)==0x00)

void AM2301(void);
void delay_1us(unsigned int time_temp);
unsigned char get_40_bits(void);