test44x_uart11_38400.c

430例程大全 端口操作 时钟模块FLL+操作 flash读写操作 看门狗操作 timerA-操作 timerB-操作 比较器A操作 基本定时器LED&LCD操作 ADC&BT&LC

#include <msp430x44x.h>

void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;             // Stop WDT
  FLL_CTL0 |= XCAP14PF;                 // Configure load caps
  UTCTL1 = SSEL1;                       // UCLK = SMCLK
  UBR01 = 0x1B;                         // 1MHz 38400 
  UBR11 = 0x00;                         // 1MHz 38400
  UMCTL1 = 0x00;                        // no modulation
  UCTL1 = CHAR;                         // 8-bit character **SWRST**
  ME2 |= UTXE1 + URXE1;                 // Enable USART1 TXD/RXD
  IE2 |= URXIE1;                        // Enable USART1 RX interrupt
  P4SEL |= 0x03;                        // P4.0,1 = USART1 TXD/RXD
  P4DIR |= 0x01;                        // P4.0 output direction
  _EINT();                              // Enable interrupts
  
  for (;;)                             
  {
    _BIS_SR(CPUOFF);                    // Enter LPM0
    _NOP();                             // Required only for C-spy
  }
}

interrupt[UART1RX_VECTOR] void usart1_rx (void)
{
  while ((IFG2 & UTXIFG1) == 0);        // USART1 TX buffer ready?
  TXBUF1 = RXBUF1;                      // RXBUF1 to TXBUF0
}