#include

#include

#include

#define uint unsigned int

#define LCD_EN_PORT P1OUT    //以下2个要设为同一个口

#define LCD_EN_DDR P1DIR

#define LCD_RS_PORT P1OUT    //以下2个要设为同一个口

#define LCD_RS_DDR P1DIR

#define LCD_DATA_PORT P2OUT  //以下3个要设为同一个口

#define LCD_DATA_DDR P2DIR   //一定要用高4位

#define LCD_RS BIT6

#define LCD_EN BIT7

#define LCD_DATA    BIT7|BIT6|BIT5|BIT4 //4位数据线连接模式

void LCD_init(void);

void LCD_init_first(void);

void LCD_en_write1(void);  //上升沿使能

void LCD_en_write2(void);  //下降沿使能

void LCD_write_command(unsigned charcommand);

void LCD_write_data(unsigned char data);

void LCD_set_xy (unsigned char x, unsignedchar y);

void LCD_write_string(unsigned charX,unsigned char Y, unsigned char s);

void LCD_write_char(unsigned charX,unsigned char Y, unsigned char data);

void delay_1ms(void);

void delay_nus(unsigned int n);

void delay_nms(unsigned int n);

unsigned char rev;

void putchar(unsigned char c)    //发送字符函数

{

while (!(IFG2&UCA0TXIFG));  // USCI_A0 TX buffer ready? 等待TX buffer为空

UCA0TXBUF = c;      // TX ->RXed character  发送字符c

}

void putstr(char *s)  //发送字符串函数

{

IE2 &= ~UCA0RXIE;  //发送时先关闭接收中断，不接收

while((*s)!='\0')  //如果没有发完，就继续循环发送

{

putchar(*s);

putchar('\n');  //发送换行符

s++;

}

IE2 |= UCA0RXIE;    //发送完了打开接收中断

}

void Init_USTAR(void)

{

BCSCTL1 =CALBC1_1MHZ;   // Set DCO为1MHz

DCOCTL =CALDCO_1MHZ;

P1SEL = BIT1 + BIT2;    // P1.1 =RXD, P1.2=TXD

P1SEL2 = BIT1 + BIT2;   //第二外围模式选择

UCA0CTL1 |= UCSSEL_2;   // SMCLK 其他默认：软件复位使能 USCI逻辑保持在复位状态，用于设置串口

UCA0BR0 = 8;            // SMCLK1MHz 115200    8

UCA0BR1 = 0;            // 1MHz115200

UCA0MCTL = UCBRS2 + UCBRS0;

UCA0CTL1 &= ~UCSWRST;

IE2|= UCA0RXIE;            //  接收中断使能

}

void main()//主函数

{

WDTCTL = WDTPW + WDTHOLD;     // 关闭看门狗

LCD_init_first();

LCD_init();

Init_USTAR();

_BIS_SR(LPM3_bits+GIE); // Enter LPM0, interrupts enabled

}

// LCD液晶操作函数

void LCD_init_first(void)     //LCD1602液晶初始化函数(热启动)

{

delay_nms(500);

LCD_DATA_DDR|=LCD_DATA;   //数据口方向为输出

LCD_EN_DDR|=LCD_EN;       //设置EN方向为输出

LCD_RS_DDR|=LCD_RS;       //设置RS方向为输出

delay_nms(50);

LCD_write_command(0x30);

delay_nms(50);

LCD_write_command(0x30);

delay_nms(5);

LCD_write_command(0x30);

delay_nms(500);

}

//LCD1602液晶初始化函数

void LCD_init(void)

{

delay_nms(500);

LCD_DATA_DDR|=LCD_DATA;   //数据口方向为输出

LCD_EN_DDR|=LCD_EN;       //设置EN方向为输出

LCD_RS_DDR|=LCD_RS;       //设置RS方向为输出

delay_nms(500);

LCD_write_command(0x28);  //4位数据接口

delay_nms(50);

LCD_write_command(0x28);  //4位数据接口

delay_nms(50);

LCD_write_command(0x28);  //4位数据接口

delay_nms(50);

LCD_en_write2();

delay_nms(50);

LCD_write_command(0x28); //4位数据接口

delay_nms(500);

LCD_write_command(0x01); //清屏

LCD_write_command(0x0c); //显示开，关光标，不闪烁

LCD_write_command(0x06); //设定输入方式，增量不移位

delay_nms(50);

}

//液晶使能上升沿

void LCD_en_write1(void)

{

LCD_EN_PORT&=~LCD_EN;

delay_nus(10);

LCD_EN_PORT|=LCD_EN;

}

//液晶使能下降沿

void LCD_en_write2(void)

{

LCD_EN_PORT|=LCD_EN;

delay_nus(10);

LCD_EN_PORT&=~LCD_EN;

}

//写指令函数

void LCD_write_command(unsigned charcommand)

{

delay_nus(16);

P2SEL=0x00;

LCD_RS_PORT&=~LCD_RS; //RS=0

LCD_en_write1();

LCD_DATA_PORT&=0X0f; //清高四位

LCD_DATA_PORT|=command&0xf0; //写高四位

delay_nus(16);

LCD_en_write2();

command=command<<4; //低四位移到高四位

LCD_en_write1();

LCD_DATA_PORT&=0x0f; //清高四位

LCD_DATA_PORT|=command&0xf0; //写低四位

LCD_en_write2();

}

//写数据函数

void LCD_write_data(unsigned char data)

{

delay_nus(16);

P2SEL=0x00;

LCD_RS_PORT|=LCD_RS;      //RS=1

LCD_en_write1();          //E上升沿

LCD_DATA_PORT&=0X0f;      //清高四位

LCD_DATA_PORT|=data&0xf0; //写高四位

delay_nus(16);

LCD_en_write2();

data=data<<4;             //低四位移到高四位

LCD_en_write1();

LCD_DATA_PORT&=0X0f;      //清高四位

LCD_DATA_PORT|=data&0xf0; //写低四位

LCD_en_write2();

}

//写地址函数

void LCD_set_xy( unsigned char x, unsignedchar y )

{

unsigned char address;

if (y == 0) address = 0x80 + x;

else address = 0xc0 + x;

LCD_write_command( address);

}

//LCD在任意位置写字符串，列x=0~15,行y=0,1

void LCD_write_string(unsigned charX,unsigned char Y,unsigned char s)

{

LCD_set_xy( X, Y ); //写地址

LCD_write_data( s );

}

//LCD在任意位置写字符,列x=0~15,行y=0,1

void LCD_write_char(unsigned charX,unsigned char Y,unsigned char data)

{

LCD_set_xy( X, Y ); //写地址

LCD_write_data( data);

}

//1us延时函数

void delay_1us(void)

{

asm("nop");

}

//N us延时函数

void delay_nus(unsigned int n)

{

unsigned int i;

for(i=0;i

delay_1us();

}

//1ms延时函数

void delay_1ms(void)

{

unsigned int i;

for (i=0;i<1140;i++);

}

//N ms延时函数

void delay_nms(unsigned int n)

{

unsigned int i=0;

for (i=0;i

delay_1ms();

}

#pragma vector=USCIAB0RX_VECTOR

__interrupt void USCI0RX_ISR(void)

{

while (!(IFG2&UCA0TXIFG));    // USCI_A0 TX buffer ready? 等待TX buffer为空

UCA0TXBUF = UCA0RXBUF;         //TX -> RXed character  发送接收到是数据

rev=UCA0RXBUF;

putchar(rev);

LCD_write_string(0,0,rev);

delay_nms(10);

}