编写一段MSP432P401R的ADC采样程序，要求当按键P1.1按下时开始ADC采样，然后将采样结果显示在LCD屏幕上

好的，以下是您要求的MSP432P401R的ADC采样程序：

#include "msp.h" //MSP432库头文件

#define LCD_RS BIT0 //LCD屏幕控制使用的IO口
#define LCD_EN BIT1
#define LCD_D4 BIT2
#define LCD_D5 BIT3
#define LCD_D6 BIT4
#define LCD_D7 BIT5

void LCD_Init(void)
{
    //初始化LCD屏幕
    P2SEL0 &= ~(LCD_RS | LCD_EN | LCD_D4 | LCD_D5 | LCD_D6 | LCD_D7);
    P2SEL1 &= ~(LCD_RS | LCD_EN | LCD_D4 | LCD_D5 | LCD_D6 | LCD_D7);
    P2DIR |= (LCD_RS | LCD_EN | LCD_D4 | LCD_D5 | LCD_D6 | LCD_D7);

    P2OUT &= ~LCD_EN;
    P2OUT &= ~LCD_RS;

    P2OUT = 0x20;
    Pulse_LCD_EN();

    Write_LCD(0x28, 0);
    Write_LCD(0x0E, 0);
    Write_LCD(0x06, 0);
    Write_LCD(0x01, 0);
    Write_LCD(0x80, 0);
}

void Pulse_LCD_EN(void)
{
    //Pulse EN脚
    P2OUT |= LCD_EN;
    __delay_cycles(100);
    P2OUT &= ~LCD_EN;
    __delay_cycles(100);
}

void Write_LCD(char dataByte,unsigned char command)
{
    //写字符到LCD屏幕
    if (command==1)
        P2OUT &= ~LCD_RS;
    else
        P2OUT |= LCD_RS;

    P2OUT |= ((dataByte>>4)&0x0F)<<LCD_D4;
    Pulse_LCD_EN();
    P2OUT &= ~(0x0F<<LCD_D4);

    P2OUT |= (dataByte&0x0F)<<LCD_D4;
    Pulse_LCD_EN();
    P2OUT &= ~(0x0F<<LCD_D4);

    __delay_cycles(200);
}

void ADC_Init(void)
{
    //初始化ADC模块
    ADC14CTL0 &= ~ADC14ENC; //关闭ADC14使能
    ADC14CTL0 |= ADC14CONSEQ_2 | ADC14SHT0_3 | ADC14ON; //转换模式为连续转换模式、采样时钟为16个时钟周期、开启ADC14模块
    ADC14CTL1 |= ADC14RES_1 | ADC14SHP | ADC14SSEL_0 | ADC14CONSEQ_2; //ADC14分辨率位10位、使用内置传输和采样定时器、采样定时器使用SMCLK、转换模式为连续转换模式
    ADC14MCTL0 |= ADC14INCH_1; //选择输入通道为A1
    ADC14IER0 |= ADC14IFG0; //启用ADC14中断
}

int main(void)
{
    //初始化系统时钟和端口
    WDT_A->CTL = WDT_A_CTL_PW | WDT_A_CTL_HOLD;
    CS->KEY = CS_KEY_VAL;
    CS->CTL0 = CS_CTL0_DCORSEL_3 | CS_CTL0_DCOTUNE_Msk;
    CS->CTL1 = CS_CTL1_SELS_3 | CS_CTL1_DIVS_1;
    CS->KEY = 0;

    LCD_Init();
    ADC_Init();

    while(1)
    {
        //检测按键P1.1是否按下
        if((P1IN & BIT1) == 0)
        {
            //开始采样
            ADC14CTL0 |= ADC14ENC | ADC14SC;
            while(ADC14CTL0 & ADC14BUSY);
            //转换采样结果
            int ADC_Result = ADC14MEM0 * 330 / 1023;
            //显示采样结果到LCD屏幕
            Write_LCD(ADC_Result / 100 + 48,1);
            Write_LCD((ADC_Result / 10) % 10 + 48,0);
            Write_LCD(ADC_Result % 10 + 48,0);
        }
    }
}

这是一段简单的程序，其中包括了ADC模块的初始化、LCD屏幕的初始化，以及读取按键状态、进行ADC采样、显示结果等过程。希望可以帮助您解决问题！