UART communication between two PIC32MX120F032B

int main(void) {
	PPSUnLock;
	PPSInput(3, U1RX, RPB6);
	PPSOutput(1, RPB7, U1TX);
	PPSLock; 

	PORTB = 0;
	TRISB = 0;

	U1BRG = 51; 	// Set Baud rate (9600 bps)
	U1MODE = 0x8000; // Enable UART for 8-bit data, no parity, 1 Stop bit
	U1STA = 0x1400;	

	U1TXREG = 'u';
	while(!U1STAbits.TRMT);

	PORTBbits.RB4 = 1;

	while(1);
	return 1;
}

int main(void) {
	PPSUnLock;
	PPSInput(3, U1RX, RPB6);
	PPSOutput(1, RPB7, U1TX);
	PPSLock; 

	PORTB = 0;
	TRISB = 0;

	U1BRG = 51; 	// Set Baud rate (9600 bps)
	U1MODE = 0x8000; // Enable UART for 8-bit data, no parity, 1 Stop bit
	U1STA = 0x1400;	

	PORTBbits.RB4 = 1;

	while(!U1STAbits.URXDA);

	PORTBbits.RB4 = 0;

	while(1);
	return 1;
}

#include <plib.h>					// Peripheral Library
#include "stdio.h" 
// External oscillator frequency 
#define SYSCLK  80000000UL		//  (8MHz Crystal/ FPLLIDIV * FPLLMUL / FPLLODIV)

#define	GetSystemClock() 			(SYSCLK)
#define	GetPeripheralClock()		(GetSystemClock()/(1 << OSCCONbits.PBDIV))

//  initialize UART
//   Input: baud rate
//   Output: 1 for OK, 0 if baud rate error > 3%
int UART2Init(const long int BAUDRATE)
{
    int error;
	// This initialization assumes 36MHz Fpb clock. If it changes,
	// you will have to modify baud rate initializer.
    UARTConfigure(UART2, UART_ENABLE_PINS_TX_RX_ONLY);
    UARTSetFifoMode(UART2, UART_INTERRUPT_ON_TX_NOT_FULL | UART_INTERRUPT_ON_RX_NOT_EMPTY);
    UARTSetLineControl(UART2, UART_DATA_SIZE_8_BITS | UART_PARITY_NONE | UART_STOP_BITS_1);
    UARTSetDataRate(UART2, GetPeripheralClock(), BAUDRATE);
    UARTEnable(UART2, UART_ENABLE_FLAGS(UART_PERIPHERAL | UART_RX | UART_TX));
    error = (int) (100 *( (long int) UARTGetDataRate(UART2, GetPeripheralClock())- BAUDRATE)/BAUDRATE);
    if (error > 2) 
       { printf("\n\n" UARTNAME " baud rate shold be %ld is %lu error %d\n", BAUDRATE, UARTGetDataRate(UART2, GetPeripheralClock()), error);  return -1; }
    printf(""UARTNAME " baud rate %ld set up\n", BAUDRATE);
    return 0;
}

//Function:UART GetChar : waits for a byte to be received.  It then returns that byte.
char UART2GetChar()
{
     return UARTGetDataByte(UART2);						// read character into buffer
}

// Function:UART PutChar - This routine writes a character to the transmit FIFO
void UART2PutChar(const char ch )
{
    while(!UARTTransmitterIsReady(UART2));
    UARTSendDataByte(UART2, ch);				// transmit character
}