生成一段四个com口的MSP430控制lcd的代码

好的，以下是一段控制LCD显示器的MSP430代码，使用了四个COM端口：

#include <msp430.h>

#define LCD_RS BIT0
#define LCD_EN BIT1
#define LCD_D4 BIT2
#define LCD_D5 BIT3
#define LCD_D6 BIT4
#define LCD_D7 BIT5

void lcd_init(void);
void lcd_command(unsigned char);
void lcd_data(unsigned char);
void lcd_string(char *);

void main(void)
{
    WDTCTL = WDTPW + WDTHOLD; // 关闭看门狗
    P1DIR |= LCD_RS + LCD_EN + LCD_D4 + LCD_D5 + LCD_D6 + LCD_D7; // 配置端口
    lcd_init(); // 初始化LCD显示器

    while(1)
    {
        lcd_command(0x80); // 将光标移动到第一行开头
        lcd_string("Hello, World!"); // 在第一行显示文本
        __delay_cycles(1000000); // 延时1秒
    }
}

void lcd_init(void)
{
    lcd_command(0x33);
    lcd_command(0x32);
    lcd_command(0x28);
    lcd_command(0x0C);
    lcd_command(0x06);
    lcd_command(0x01);
}

void lcd_command(unsigned char cmd)
{
    P1OUT &= ~(LCD_RS + LCD_D4 + LCD_D5 + LCD_D6 + LCD_D7); // RS = 0, D4-D7 = 0

    P1OUT |= ((cmd >> 4) & 0x0F) << 2; // D4-D7 = cmd[7:4]
    P1OUT |= LCD_EN; // EN = 1
    __delay_cycles(100);
    P1OUT &= ~LCD_EN; // EN = 0

    P1OUT &= ~LCD_D4; // D4-D7 = 0
    P1OUT |= ((cmd) & 0x0F) << 2; // D4-D7 = cmd[3:0]
    P1OUT |= LCD_EN; // EN = 1
    __delay_cycles(100);
    P1OUT &= ~LCD_EN; // EN = 0

    __delay_cycles(1000);
}

void lcd_data(unsigned char data)
{
    P1OUT |= LCD_RS; // RS = 1
    P1OUT &= ~(LCD_D4 + LCD_D5 + LCD_D6 + LCD_D7); // D4-D7 = 0

    P1OUT |= ((data >> 4) & 0x0F) << 2; // D4-D7 = data[7:4]
    P1OUT |= LCD_EN; // EN = 1
    __delay_cycles(100);
    P1OUT &= ~LCD_EN; // EN = 0

    P1OUT &= ~LCD_D4; // D4-D7 = 0
    P1OUT |= ((data) & 0x0F) << 2; // D4-D7 = data[3:0]
    P1OUT |= LCD_EN; // EN = 1
    __delay_cycles(100);
    P1OUT &= ~LCD_EN; // EN = 0

    __delay_cycles(1000);
}

void lcd_string(char *str)
{
    while(*str)
    {
        lcd_data(*str++);
    }
}

希望这段代码能够帮助到你！