#include <msp430g2231.h>
#include <stdio.h>
#include <stdint.h>

#define I2C_add_read 0xD0
#define I2C_add_write 0xD1

    
void main(void) {
    WDTCTL = WDTPW + WDTHOLD;                                                   //disable watchdog timer
    
    //-I2C init
	USICTL0 |= USIPE7 + USIPE6 + USIMST + USIOE + USISWRST;                     
	USICTL1 = USII2C;                                                           
	USICKCTL = USIDIV_2 + USISSEL_2 + USICKPL;                                 

	USICNT |= USIIFGCC;                  										
	USICTL0 &= ~USISWRST;                                                      
	USICTL1 &= ~USIIFG;                                                                   
    
    while(1)
    {
		USICNT |= USIIFGCC;                  										
		USICTL0 &= ~USISWRST;                                                      
		USICTL1 &= ~USIIFG; 
		//Start Condition
		USISRL = 0x00;           													
		USICTL0 |= USIGE + USIOE;													
		USICTL0 &= ~USIGE;
        
        //Send Data
		USISRL = I2C_add_read;                                                         
		USICTL0 |= USIOE;															
        USICNT = 0x08;
        while((USICTL1 & USIIFG) != 0x01);                                          
        
        //Read Ack Bit
        USICTL0 &= ~USIOE;       
        USICNT = 0x01;
        USICTL0 |= USIOE;          
        while((USICTL1 & USIIFG) != 0x01);
        ack_flag = USISRL;
        
        //Stop
        USICTL0 |= USIOE;
        USISRL = 0x00;                                                              
        USICNT = 1;
        while((USICTL1 & USIIFG) != 0x01);                                          
      
        USISRL = 0xFF;                                                             
        USICTL0 |= USIGE;
        USICTL0 &= ~(USIGE+USIOE);
        
        for(delay=0; delay<100; delay++);        
    }
}