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当main函数中有while（1）{...}，msp430g2553的硬件串口（USCI_A0）不能进入接收中断函数，一直在执行while中东西，请问在保留while的基础上有办法进入接收中断吗？谢谢
下面的代码已测试，请您试一下。使用的是G2553 Launchpad
#include "msp430g2553.h" #define TXLED BIT0 #define RXLED BIT6 #define TXD BIT2 #define RXD BIT1 const char string[] = { "Hello World\r\n" }; unsigned int i; //Counter int main(void) { WDTCTL = WDTPW + WDTHOLD; // Stop WDT DCOCTL = 0; // Select lowest DCOx and MODx settings BCSCTL1 = CALBC1_1MHZ; // Set DCO DCOCTL = CALDCO_1MHZ; P2DIR |= 0xFF; // All P2.x outputs P2OUT &= 0x00; // All P2.x reset P1SEL |= RXD + TXD ; // P1.1 = RXD, P1.2=TXD P1SEL2 |= RXD + TXD ; // P1.1 = RXD, P1.2=TXD P1DIR |= RXLED + TXLED; P1OUT &= 0x00; UCA0CTL1 |= UCSSEL_2; // SMCLK UCA0BR0 = 104; // 1MHz 9600 UCA0BR1 = 0; // 1MHz 9600 UCA0MCTL = UCBRS2 + UCBRS0; // Modulation UCBRSx = 5 UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine** UC0IE |= UCA0RXIE; // Enable USCI_A0 RX interrupt __bis_SR_register(CPUOFF + GIE); // Enter LPM0 w/ int until Byte RXed while (1) { } } #pragma vector=USCIAB0TX_VECTOR __interrupt void USCI0TX_ISR(void) { P1OUT |= TXLED; UCA0TXBUF = string[i++]; // TX next character if (i == sizeof string - 1) // TX over? UC0IE &= ~UCA0TXIE; // Disable USCI_A0 TX interrupt P1OUT &= ~TXLED; } #pragma vector=USCIAB0RX_VECTOR __interrupt void USCI0RX_ISR(void) { P1OUT |= RXLED; if (UCA0RXBUF == 'a') // 'a' received? { i = 0; UC0IE |= UCA0TXIE; // Enable USCI_A0 TX interrupt UCA0TXBUF = string[i++]; } P1OUT &= ~RXLED; }
