CCS/MSP-EXP430F5529: MSP-EXP430F5529

i wrote the following code in the main function but i didn't receive the whole characters

what i missed please?

while(1){

unsigned char x;
char *receive;
unsigned int i;
while (!(UCA0IFG&UCRXIFG)); // USCI_A0 RX buffer ready?
{
receive = (char*)malloc(x* sizeof(char) ); /* allocating memory dynamically */

for (i=0; i<x;i++){
receive[i]=UCA0RXBUF;
// free(receive);
}}
while(!(UCA0IFG&UCTXIFG));{
for (i=0; i<x;i++){
UCA0TXBUF=receive[i];}

}
free(receive);

}

Hi 

Two suggestions here:

1. make a protocol and put the received data length inside .

2. use receive interrupt (For more detail operation you can refer ) 

Hi Ali,

You can receive every single byte and transmit that byte immediately.

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//******************************************************************************
//   MSP430F552x Demo - USCI_A0, 115200 UART Echo ISR, DCO SMCLK
//
//   Description: Echo a received character, RX ISR used. Normal mode is LPM0.
//   USCI_A0 RX interrupt triggers TX Echo.
//   Baud rate divider with 1048576hz = 1048576/115200 = ~9.1 (009h|01h)
//   ACLK = REFO = ~32768Hz, MCLK = SMCLK = default DCO = 32 x ACLK = 1048576Hz
//   See User Guide for baud rate divider table
//
//                 MSP430F552x
//             -----------------
//         /|\|                 |
//          | |                 |
//          --|RST              |
//            |                 |
//            |     P3.3/UCA0TXD|------------>
//            |                 | 115200 - 8N1
//            |     P3.4/UCA0RXD|<------------
//
//   Bhargavi Nisarga
//   Texas Instruments Inc.
//   April 2009
//   Built with CCSv4 and IAR Embedded Workbench Version: 4.21
//******************************************************************************

#include <msp430.h>

int main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT

  P3SEL |= BIT3+BIT4;                       // P3.3,4 = USCI_A0 TXD/RXD
  UCA0CTL1 |= UCSWRST;                      // **Put state machine in reset**
  UCA0CTL1 |= UCSSEL_2;                     // SMCLK
  UCA0BR0 = 9;                              // 1MHz 115200 (see User's Guide)
  UCA0BR1 = 0;                              // 1MHz 115200
  UCA0MCTL |= UCBRS_1 + UCBRF_0;            // Modulation UCBRSx=1, UCBRFx=0
  UCA0CTL1 &= ~UCSWRST;                     // **Initialize USCI state machine**
  UCA0IE |= UCRXIE;                         // Enable USCI_A0 RX interrupt

  __bis_SR_register(LPM0_bits + GIE);       // Enter LPM0, interrupts enabled
  __no_operation();                         // For debugger
}

// Echo back RXed character, confirm TX buffer is ready first
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=USCI_A0_VECTOR
__interrupt void USCI_A0_ISR(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(USCI_A0_VECTOR))) USCI_A0_ISR (void)
#else
#error Compiler not supported!
#endif
{
  switch(__even_in_range(UCA0IV,4))
  {
  case 0:break;                             // Vector 0 - no interrupt
  case 2:                                   // Vector 2 - RXIFG
    while (!(UCA0IFG&UCTXIFG));             // USCI_A0 TX buffer ready?
    UCA0TXBUF = UCA0RXBUF;                  // TX -> RXed character
    break;
  case 4:break;                             // Vector 4 - TXIFG
  default: break;
  }
}

Ling

Thanks Ling Zhu2