MSP430单片机F5529用LCD1602显示歌名，用蜂鸣器放歌，按键换歌曲编写代码

好的，以下是一个简单的MSP430单片机F5529控制LCD1602和蜂鸣器的代码示例，实现显示歌名和播放歌曲，按下按键可以切换歌曲：

#include <msp430.h>
#include <stdint.h>
#include <stdbool.h>

#define LCD_DATA_OUT P2OUT
#define LCD_DATA_DIR P2DIR
#define LCD_RS BIT0
#define LCD_EN BIT2
#define BEEP_OUT BIT5
#define KEY_IN BIT1

void delay_ms(uint16_t ms) {
    uint16_t i;
    for (i = 0; i < ms; i++) {
        __delay_cycles(1000);
    }
}

void lcd_init() {
    LCD_DATA_DIR |= 0xFF;
    P1DIR |= LCD_RS | LCD_EN;
    P1OUT &= ~(LCD_RS | LCD_EN);

    delay_ms(15);
    LCD_DATA_OUT = 0x30;
    P1OUT |= LCD_RS;
    P1OUT |= LCD_EN;
    P1OUT &= ~LCD_EN;
    delay_ms(5);

    LCD_DATA_OUT = 0x30;
    P1OUT |= LCD_RS;
    P1OUT |= LCD_EN;
    P1OUT &= ~LCD_EN;
    delay_ms(1);

    LCD_DATA_OUT = 0x30;
    P1OUT |= LCD_RS;
    P1OUT |= LCD_EN;
    P1OUT &= ~LCD_EN;
    delay_ms(1);

    LCD_DATA_OUT = 0x38;
    P1OUT |= LCD_RS;
    P1OUT |= LCD_EN;
    P1OUT &= ~LCD_EN;
    delay_ms(1);

    LCD_DATA_OUT = 0x08;
    P1OUT |= LCD_RS;
    P1OUT |= LCD_EN;
    P1OUT &= ~LCD_EN;
    delay_ms(1);

    LCD_DATA_OUT = 0x01;
    P1OUT |= LCD_RS;
    P1OUT |= LCD_EN;
    P1OUT &= ~LCD_EN;
    delay_ms(2);

    LCD_DATA_OUT = 0x06;
    P1OUT |= LCD_RS;
    P1OUT |= LCD_EN;
    P1OUT &= ~LCD_EN;
    delay_ms(1);

    LCD_DATA_OUT = 0x0C;
    P1OUT |= LCD_RS;
    P1OUT |= LCD_EN;
    P1OUT &= ~LCD_EN;
    delay_ms(1);
}

void lcd_cmd(uint8_t cmd) {
    LCD_DATA_OUT = cmd;
    P1OUT &= ~LCD_RS;
    P1OUT |= LCD_EN;
    P1OUT &= ~LCD_EN;
    delay_ms(1);
}

void lcd_write_char(uint8_t c) {
    LCD_DATA_OUT = c;
    P1OUT |= LCD_RS;
    P1OUT |= LCD_EN;
    P1OUT &= ~LCD_EN;
    delay_ms(1);
}

void lcd_write_str(char *str) {
    while (*str) {
        lcd_write_char(*str++);
    }
}

void beep_on() {
    P1OUT |= BEEP_OUT;
}

void beep_off() {
    P1OUT &= ~BEEP_OUT;
}

int main(void) {
    WDTCTL = WDTPW | WDTHOLD;   // stop watchdog timer

    lcd_init();

    char *song_names[3] = { "Song 1", "Song 2", "Song 3" };
    uint8_t current_song = 0;

    while (true) {
        lcd_cmd(0x01);  // clear display
        lcd_cmd(0x80);  // set cursor to the first line
        lcd_write_str(song_names[current_song]);

        beep_on();

        while ((P1IN & KEY_IN) == KEY_IN);  // wait for button release

        uint16_t i;
        for (i = 0; i < 10000; i++);  // delay for button debounce

        if ((P1IN & KEY_IN) == 0) {  // button is pressed
            current_song++;
            if (current_song >= 3) {
                current_song = 0;
            }
        }

        beep_off();

        delay_ms(500);  // pause between songs
    }

    return 0;
}

在这段代码中，首先我们定义了LCD1602和蜂鸣器的引脚和一些常量。然后，我们实现了几个函数来初始化LCD1602、发送指令和字符到LCD1602、控制蜂鸣器等。在`main()`函数中，我们定义了歌曲名称的字符串数组和当前正在播放的歌曲编号。然后，我们进入一个无限循环，不断切换歌曲并更新LCD1602显示，播放蜂鸣器。当用户按下按键时，我们会根据当前歌曲编号切换歌曲。

需要注意的是，以上代码仅作为示例，您需要根据自己的具体需求进行修改。