USART0- Receiver

Hello,
i am Ravi beginner of MSP430 family controller(MSP430F1611). i am using
one downloaded code from TI website for interrupt based Receiver program.
i am debugging this program can't receive any charector from receiver
buffer. so please clarify anybody this group. herewith i am attached those
code.


#include  <msp430x16x.h>

void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
  P3SEL |= 0x30;													// P3.4,5 = USART0 TXD/RXD
  P3DIR |= 0x10;
  
  ME1 |= UTXE0 + URXE0;                     // Enable USART0 TXD/RXD
  UCTL0 |= CHAR;                            // 8-bit character
  UTCTL0 |= SSEL0;                          // UCLK = ACLK
  UBR00 = 0x03;                             // 32k/9600 - 3.41
  UBR10 = 0x00;                             //
  UMCTL0 = 0x4A;                            // Modulation
  UCTL0 &= ~SWRST;                          // Initialize USART state
machine
  IE1 |= URXIE0;                            // Enable USART0 RX interrupt
 
  _BIS_SR(LPM3_bits + GIE);                 // Enter LPM3 w/ interrupt
}

#pragma vector=UART0RX_VECTOR
__interrupt void usart0_rx (void)
{
  while (!(IFG1 & UTXIFG0));                // USART0 TX buffer ready?
  TXBUF0 = RXBUF0;                          // RXBUF0 to TXBUF0
}

On Mar 10, 8:18 am, "msp430" <sravifo...@gmail.com> wrote:
> Hello,
> i am Ravi beginner of MSP430 family controller(MSP430F1611). i am using
> one downloaded code from TI website for interrupt based Receiver program.
> i am debugging this program can't receive any charector from receiver
> buffer. so please clarify anybody this group. herewith i am attached those
> code.
>
> #include  <msp430x16x.h>
>
> void main(void)
> {
>   WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
>   P3SEL |= 0x30;                                                                                                        // P3.4,5 = USART0 TXD/RXD
>   P3DIR |= 0x10;
>
>   ME1 |= UTXE0 + URXE0;                     // Enable USART0 TXD/RXD
>   UCTL0 |= CHAR;                            // 8-bit character
>   UTCTL0 |= SSEL0;                          // UCLK = ACLK
>   UBR00 = 0x03;                             // 32k/9600 - 3.41
>   UBR10 = 0x00;                             //
>   UMCTL0 = 0x4A;                            // Modulation
>   UCTL0 &= ~SWRST;                          // Initialize USART state
> machine
>   IE1 |= URXIE0;                            // Enable USART0 RX interrupt
>
>   _BIS_SR(LPM3_bits + GIE);                 // Enter LPM3 w/ interrupt
>
> }
>
> #pragma vector=UART0RX_VECTOR
> __interrupt void usart0_rx (void)
> {
>   while (!(IFG1 & UTXIFG0));                // USART0 TX buffer ready?
>   TXBUF0 = RXBUF0;                          // RXBUF0 to TXBUF0
>
> }

I suspect that the  // 32k/9600 - 3.41 statement is not giving you a
good enough frequency.  I mean not close enough to 9600baud.   Try
1200 if you can.
Also I bet TI has an application not that should address this issue.

george