msp430f5529超声波测距并用oled显示的代码

以下是一个基于msp430f5529的超声波测距并用oled显示的代码示例：

#include <msp430.h>
#include <stdio.h>
#include "oled.h"

#define TRIG BIT3
#define ECHO BIT4

volatile int distance = 0;
volatile int count = 0;

void init_timer(void) {
    TA0CTL |= TASSEL_2 + MC_1 + ID_3; // SMCLK, UP, DIV 8
    TA0CCR0 = 60000; // 15ms
    TA0CCTL0 |= CCIE;
}

void init_gpio(void) {
    P2DIR |= TRIG;
    P2DIR &= ~ECHO;
    P2IE |= ECHO;
    P2IES &= ~ECHO;
    P2IFG &= ~ECHO;
}

void main(void) {
    WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
    P4SEL |= BIT1 + BIT2; // UART
    P4DIR |= BIT1; // TXD
    UCA1CTL1 |= UCSWRST; // Reset
    UCA1CTL1 |= UCSSEL_2; // SMCLK
    UCA1BR0 = 104; // 9600 baud rate
    UCA1BR1 = 0;
    UCA1MCTL |= UCBRS_1 + UCBRF_0;
    UCA1CTL1 &= ~UCSWRST; // Start
    OLED_init();
    OLED_clear();
    OLED_write_string("Distance: ");
    init_timer();
    init_gpio();
    __bis_SR_register(LPM0_bits + GIE);
}

#pragma vector=PORT2_VECTOR
__interrupt void Port_2(void) {
    if (P2IFG & ECHO) {
        if (P2IES & ECHO) {
            TA0CTL |= TACLR;
            count = 0;
            P2IES &= ~ECHO;
        } else {
            distance = TA0R / 58;
            char str[10];
            sprintf(str, "%d", distance);
            OLED_set_pos(0, 80);
            OLED_write_string(str);
            P2IES |= ECHO;
        }
        P2IFG &= ~ECHO;
    }
}

#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A(void) {
    if (count < 3) {
        P2OUT |= TRIG;
        __delay_cycles(10);
        P2OUT &= ~TRIG;
        count++;
    } else {
        TA0CTL &= ~MC_1;
        TA0CTL |= MC_1;
        count = 0;
    }
}

该代码使用定时器和中断实现超声波测距，并将距离信息显示在oled屏幕上。请确保正确连接超声波传感器和oled屏幕，并根据需要调整代码中的引脚和定时器参数。