MSP430FR2311 software UART

Hi,

I want to make a software UART using MSP430fr2311 device. My code is able to transmit data from the msp430 device to pc. Can anyone help me for the receiver code? I am getting difficulties in that part.

#include <msp430fr2311.h>
#define     TXD             BIT0
#define     RXD             BIT1


int transmit(unsigned char);
unsigned char dtx, rtx,i=0;

int main(void)
{

     WDTCTL = WDTPW | WDTHOLD;               // Stop watchdog timer

 __bis_SR_register(SCG0);                   // disable FLL
     CSCTL3 |= SELREF__REFOCLK;              // Set REFO as FLL reference source
     CSCTL0 = 0;                             // clear DCO and MOD registers
     CSCTL1 &= ~(DCORSEL_7);                 // Clear DCO frequency select bits first
     CSCTL1 |= DCORSEL_3;                    // Set DCO = 8MHz
     CSCTL2 = FLLD_0 + 243;                  // DCODIV = 1
     __delay_cycles(3);
     __bic_SR_register(SCG0);                // enable FLL
      while(CSCTL7 & (FLLUNLOCK0 | FLLUNLOCK1)); // Poll until FLL is locked


      CSCTL4 = SELMS__DCOCLKDIV | SELA__REFOCLK;            // set default REFO(~32768Hz) as ACLK source, ACLK = 32768Hz
                                                                                                                    // default DCODIV as MCLK and SMCLK source



    P1DIR |= BIT0 + BIT1;                          // Set P1.0 to output direction
    P1OUT |= BIT0 + BIT1;
    PM5CTL0 &= ~LOCKLPM5;                   // Disable the GPIO power-on default high-impedance mode
                                                                         // to activate previously configured port settings


    while(1)
    {
    transmit(0xAA);

    }
}

 int transmit(unsigned char dtx)
 {
    static unsigned char temp_dt=0;

     P1OUT &= ~BIT0;                 //start bit
      __delay_cycles(800);
     temp_dt = 0;

   for(i = 0; i < 8; i++)
      {

      temp_dt = (dtx>>i & 0x01);

      if(temp_dt==1)
          P1OUT |= BIT0;               //data bits
      else
          P1OUT &= ~BIT0;          //data bits
      __delay_cycles(800);

      }

   P1OUT |= BIT0;
   __delay_cycles(1600);

 temp_dt = 0;
 }

#include <msp430fr2311.h>
#define     TXD             BIT0
#define     RXD             BIT1


int transmit(unsigned char);
unsigned char dtx, rtx,i=0;

int main(void)
{

     WDTCTL = WDTPW | WDTHOLD;               // Stop watchdog timer

 __bis_SR_register(SCG0);                   // disable FLL
     CSCTL3 |= SELREF__REFOCLK;              // Set REFO as FLL reference source
     CSCTL0 = 0;                             // clear DCO and MOD registers
     CSCTL1 &= ~(DCORSEL_7);                 // Clear DCO frequency select bits first
     CSCTL1 |= DCORSEL_3;                    // Set DCO = 8MHz
     CSCTL2 = FLLD_0 + 243;                  // DCODIV = 1
     __delay_cycles(3);
     __bic_SR_register(SCG0);                // enable FLL
      while(CSCTL7 & (FLLUNLOCK0 | FLLUNLOCK1)); // Poll until FLL is locked


      CSCTL4 = SELMS__DCOCLKDIV | SELA__REFOCLK;            // set default REFO(~32768Hz) as ACLK source, ACLK = 32768Hz
                                                                                                                    // default DCODIV as MCLK and SMCLK source



    P1DIR |= BIT0 + BIT1;                          // Set P1.0 to output direction
    P1OUT |= BIT0 + BIT1;
    PM5CTL0 &= ~LOCKLPM5;                   // Disable the GPIO power-on default high-impedance mode
                                                                         // to activate previously configured port settings


    while(1)
    {
    transmit(0xAA);

    }
}

 int transmit(unsigned char dtx)
 {
    static unsigned char temp_dt=0;

     P1OUT &= ~BIT0;                 //start bit
      __delay_cycles(800);
     temp_dt = 0;

   for(i = 0; i < 8; i++)
      {

      temp_dt = (dtx>>i & 0x01);

      if(temp_dt==1)
          P1OUT |= BIT0;               //data bits
      else
          P1OUT &= ~BIT0;          //data bits
      __delay_cycles(800);

      }

   P1OUT |= BIT0;
   __delay_cycles(1600);

 temp_dt = 0;
 }