#include <msp430x22x4.h>

unsigned char number[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39};

void WriteCommandLCM(unsigned char lcmcmd,unsigned char busy);//寫(xiě)指令
void WriteDataLCM(unsigned char lcmdata);//寫(xiě)數(shù)據(jù)
void ReadStatusLCM();//讀狀態(tài)字
//=============================================
void Delay(int v)
  {
   while(v!=0)v--;
  }
//=============================================
void LcmCls()//清屏
  {
    WriteCommandLCM(0x01,1);
  }
//=============================================
void WriteCommandLCM(unsigned char lcmcmd,unsigned char busy)//寫(xiě)指令
  {
    if(busy) ReadStatusLCM(); //根據(jù)需要檢測(cè)忙
    P3DIR|=0x3c;
    P4OUT&=~BIT0;//RS=0
    P4OUT&=~BIT1;//RW=0
    P3OUT&=0xc3;//清高四位
    P3OUT|=(lcmcmd>>2)&0x3c;//輸出高四位
    P4OUT|=BIT2;//E=1
    P4OUT&=~BIT2;//E=0
    P3OUT&=0xc3;
    P3OUT|=(lcmcmd<<2)&0x3c;//輸出低四位
    P4OUT|=BIT2;//E=1
    P4OUT&=~BIT2;//E=0
  }
//=============================================
void WriteDataLCM(unsigned char lcmdata)//寫(xiě)數(shù)據(jù)
  {   
    ReadStatusLCM();
    P3DIR|=0x3c;
    P4OUT|=BIT0;//RS=1
    P4OUT&=~BIT1;//RW=0
    P3OUT&=0xc3;
    P3OUT|=(lcmdata>>2)&0x3c;//輸出高四位
    P4OUT|=BIT2;//E=1
    P4OUT&=~BIT2;//E=0
    P3OUT&=0xc3;
    P3OUT|=(lcmdata<<2)&0x3c;//輸出低四位
    P4OUT|=BIT2;//E=1
    P4OUT&=~BIT2;//E=0
  }
//=============================================
void ReadStatusLCM()//讀狀態(tài)字
  {
    unsigned char LCMStatus;
    P3DIR&=0xc3;
    P4OUT&=~BIT0;//RS=0
    P4OUT|=BIT1;//RW=1
    P4OUT|=BIT2;//E=1
    do{LCMStatus=P3IN&0x20;}
    while(LCMStatus);//檢測(cè)忙信號(hào)
    P3DIR|=0x3c;
    P3OUT&=0xc3;
    P4OUT&=~BIT2;//E=0
  }
//=============================================
//按指定位置顯示一個(gè)字符
void DisplayOneChar(unsigned char x, unsigned char y, unsigned char DData)
  {
    y&=0x1;
    x&=0xf;//限制x不能大于15，y不能大于1
    if(y) x|=0x40;//當(dāng)要顯示第二行時(shí)地址碼+0x40;
    x|=0x80;//算出指令碼
    WriteCommandLCM(x,1);//發(fā)命令字，定位光標(biāo)
    WriteDataLCM(DData);//發(fā)數(shù)據(jù)
  }
//=============================================
//按指定位置顯示一串字符
void DisplayListChar(unsigned char x, unsigned char y, unsigned char *DData)
  {
    unsigned char ListLength=0;
    y&=0x1;
    x&=0xf; //限制x不能大于15，y不能大于1
    while (DData[ListLength]>0x19) //若到達(dá)字串尾則退出
    {
      if(x<=0xf)
      {
        DisplayOneChar(x,y,DData[ListLength]); //顯示單個(gè)字符
        x++;        
      }
      ListLength++;
    }
  }
//=============================================
void InitLcd()//初始化lcd
  {
    P3DIR|=0x3c;//P3為L(zhǎng)CD輸出
    P4DIR|=0x07;//RS=p4.0,RW=P4.1,E=P4.2
    P3OUT&=0xc3;
    Delay(3000);
    WriteCommandLCM(0x38,0); //三次顯示模式設(shè)置，不檢測(cè)忙信號(hào)
    Delay(300);
    WriteCommandLCM(0x38,0);
    Delay(300);
    WriteCommandLCM(0x28,0);
    Delay(300);
    WriteCommandLCM(0x28,1); //顯示模式設(shè)置,開(kāi)始要求每次檢測(cè)忙信號(hào)
    WriteCommandLCM(0x01,1); //顯示清屏
    WriteCommandLCM(0x06,1); //顯示光標(biāo)移動(dòng)設(shè)置
    WriteCommandLCM(0x0c,1); //顯示開(kāi)及光標(biāo)設(shè)置
  }