msp430液晶屏1602驱动程序

1602液晶显示：1,16脚：地2,15脚：+53脚：接滑动变阻器，滑动变阻器另一端接地4脚：P4.5（RS)5脚: P4.6 (RW)6脚: P4.7 (E）7~14脚：接单片机的数据口P5（D0~D7)#include<msp430x14x.h>#define RS_HIGN  P4OUT|=BIT5         //P4.5#define RS_LOW   P4OUT&=~BIT5#define RW_HIGN  P4OUT|=BIT6          //P4.6#define RW_LOW   P4OUT&=~BIT6#define E_HIGN   P4OUT|=BIT7          //P4.7#define E_LOW    P4OUT&=~BIT7void LcdPos(char,char);void LcdWd(char);void LcdWc(char);void LcdWcn(char);void Delay(char);void WaitIdle();void Delay(char wDelay)  //延时子程序{  while(wDelay!=0)    wDelay--;}void WriteChar(char c,char x,char y){ LcdPos(x,y); LcdWd(c);}void WriteString(char *s,char x,char y){  char i;  if(*s==0)    return;  for(i=0;;i++)  {    if(*(s+i)==0)      break;    WriteChar(*(s+i),x,y);    x++;    if(x>15)      break;  }}void SetCur(char Para)  //设置光标，显示状态等{ Delay(2);  switch(Para)  {case 0:    {LcdWc(0x08);     break;}   case 1:    {LcdWc(0x0c);     break;}   case 2:    {LcdWc(0x0e);     break;}   case 3:    {LcdWc(0x0f);     break;}   default:     break;  }}void ClrLcd(){  LcdWc(0x01);}void WaitIdle(){  char temp;  P5DIR &=0;  RS_LOW;//RS=0;  RW_HIGN;//RW=1;  Delay(1000);  for(;;)    {      E_HIGN;//E=1;      temp=P5IN;      E_LOW;//E=0      temp&=0x80;      if(temp==0)    {P5DIR=0xff;     break;}  }}void LcdWd(char c)      //将待写数据送到端口{WaitIdle();  P5DIR=0xff;  RS_HIGN;//RS=1;  RW_LOW;//RW=0;  P5OUT=c;  E_HIGN;//E=1;  Delay(2000);  E_LOW;//E=0;}void LcdWc(char c){  WaitIdle();  LcdWcn(c);}void LcdWcn(char c )     //送控制字子程序{ P5DIR=0xff;   RS_LOW;//RS=0;      RW_LOW;//RW=0;  P5OUT=c;  E_HIGN;//E=1;  Delay(1000);  E_LOW;//E=0;}void LcdPos(char x,char y)    //设置光标所在位置{  unsigned char temp;  x &=0x0f;  y &=0x01;  if(y==0)    temp=x;  else    temp=x+0x40;  temp |=0x80;  LcdWc(temp);}void RstLcd(){  Delay(10000);   LcdWc(0x38);         //显示模式设置   LcdWc(0x08);         //显示关闭   LcdWc(0x01);         //显示清屏   LcdWc(0x06);         //显示光标移动位置   LcdWc(0x0c);         //显示开及光标设置}  int main(){  WDTCTL=WDTPW+WDTHOLD;  P4DIR=0xff;  RstLcd();  ClrLcd();  WriteString("welcome!",4,0);}