void  configurazione_SPIprova() {
	unsigned int Configuration_Write;
    P3DIR |= BIT0|BIT1|BIT2|BIT3|BIT4;
    P3OUT |= BIT4;
    P3SEL = BIT0|BIT4|BIT5;
    //P3REN |= BIT6;
    UCA0CTL1 |= UCSWRST;
    UCA0CTL0 |= UCCKPH+UCMSB+UCMST+UCSYNC; // 3-pin, 8-bit SPI master
    UCA0CTL1 |= UCSSEL_2; // SMCLK
    UCA0BR0 |= 32; // /32
    UCA0BR1 = 0;
    UCA0MCTL = 0; // No modulation
    UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
    Configuration_Write = 0x80;
    P3OUT &= (~BIT3); // Select Device
    while (!(IFG2 & UCA0TXIFG)); // USCI_A0 TX buffer ready?
    UCA0TXBUF = Configuration_Write; // Send 0x80 over SPI to MAX31865 to write on its internal Configuration_Register
    while (!(IFG2 & UCA0TXIFG));
    UCA0TXBUF=0x91;		//Write in the Configuration_Register to set VBias, Conversion Mode and Filter's Frequency bits
    REG_MAX31865[0]=UCA0TXBUF;		//Store the value in an array
    P3OUT |= (BIT3); // Unselect Device
    P3OUT &= (~BIT3); // Select Device
    UCA0TXBUF=0x83;		//Send the address of the next register I want to write
    UCA0TXBUF=0xFF;
    REG_MAX31865[3]=UCA0TXBUF;
    P3OUT |= (BIT3); // Unselect Device
    P3OUT &= (~BIT3); // Select Device
    UCA0TXBUF=0x84;
    UCA0TXBUF=0xFF;
    REG_MAX31865[4]=UCA0TXBUF;
    P3OUT |= (BIT3); // Unselect Device
    P3OUT &= (~BIT3); // Select Device
    UCA0TXBUF=0x85;
    UCA0TXBUF=0x00;
    REG_MAX31865[5]=UCA0TXBUF;
    P3OUT |= (BIT3); // Unselect Device
    P3OUT &= (~BIT3); // Select Device
    UCA0TXBUF=0x86;
    UCA0TXBUF=0x00;
    REG_MAX31865[6]=UCA0TXBUF;
    P3OUT |= (BIT3); // Unselect Device
}

void LetturaSPI_Prova() {
	unsigned int Configuration_Read;
    P3OUT &= (~BIT3); // Select Device
    Configuration_Read=0x00;
    while (!(IFG2 & UCA0TXIFG)); // USCI_A0 TX buffer ready?
    UCA0TXBUF = Configuration_Read;
    while (!(IFG2 & UCA0TXIFG));
    UCA0TXBUF=0x01; //This is the read address I need to read
    RTD_MSB=UCA0RXBUF;		//I store the value in RTD_MSB
    UCA0TXBUF=0x02;
    RTD_LSB=UCA0RXBUF;


    RTD=(RTD_LSB| (RTD_MSB<<8)); //I unify MSB and LSB to obtain a 16-bit value
    P3OUT |= (BIT3); // Unselect Device
}

void Get_Temperatura() {	//Finally I do the conversion from RTD (resistance value) to the temperature, as written on MAX31865 datasheet
	unsigned int ADC_CODE;
	unsigned int temperatura;
	ADC_CODE=(RTD>>1);
	temperatura=(ADC_CODE/32)-256;
}