msp430之lcd12864驱动

并行驱动代码：

#include "msp430g2553.h"
#define uint unsigned int
#define uchar unsigned char  

/*****************************************
 RS--->>P2.0
 RW--->>P2.1
 E---->>P2.2
 PSB-->>P2.3
 PAUSE>>P2.4
 RES-->>P2.5
******************************************/
#define DataPort P1OUT        //MCU P2<------> LCM  

/*
void DelayMs(uint x)
{
    uint a,b;
    for(a=0;a<x;a++)
      for(b=0;b<1000;b++);
}
*/  

void DelayUs2x(unsigned char t)
{
 while(--t);
}  

void DelayMs(unsigned char t)
{  

 while(t--)
 {
     //大致延时1mS
     DelayUs2x(245);
     DelayUs2x(245);
 }
}  

void DelayUs(uint x)
{
    uint a,b;
    for(a=0;a<x;a++)
      for(b=0;b<2;b++);
}
//检测忙位
void Check_Busy()
{
    P2OUT&=0xFE;     //RS=0
    P2OUT |=0x02;    //RW=1
    P2OUT |=0x04;    //E=1
    DataPort=0xFF;   //
    P1DIR=0x00;     //数据端口设为输入状态
    while((P2IN&0x80)==0x80);//忙则等待
    P1DIR=0xFF;    //数据端口还原为输出状态
    P2OUT&=0xFB;
}  

/*---------------------写命令------------------------*/
void Write_Cmd(unsigned char Cmd)
{
    Check_Busy();
    P2OUT&=0xFE;   //RS=0;
    P2OUT&=0xFD;  //RW=0;
    P2OUT |=0x04;  //E=1;
    DataPort=Cmd;
    DelayUs(5);
    P2OUT&=0xFB;  //E=0;
    DelayUs(5);
}
/*------------------------------------------------
                    写数据
------------------------------------------------*/
void Write_Data(unsigned char Data)
{
    Check_Busy();
    P2OUT |=0x01;     //RS=1;
    P2OUT&=0xFD;      //RW=0;
    P2OUT |=0x04;      //E=1;
    DataPort=Data;
    DelayUs(5);
    P2OUT&=0xFB;      //E=0;
    DelayUs(5);
}  

void Init_ST7920()
{
   DelayMs(40);           //大于40MS的延时程序
   P2OUT |=0x08;         //PSB=1;  设置为8BIT并口工作模式
   DelayMs(1);            //延时
   P2OUT&=0xDF;           //RES=0;  复位
   DelayMs(1);            //延时
   P2OUT |=0x20;          //RES=1;    复位置高
   DelayMs(10);
   Write_Cmd(0x30);       //选择基本指令集
   DelayUs(50);         //延时大于100us
   Write_Cmd(0x30);       //选择8bit数据流
   DelayUs(20);         //延时大于37us
   Write_Cmd(0x0c);       //开显示(无游标、不反白)
   DelayUs(50);         //延时大于100us
   Write_Cmd(0x01);       //清除显示，并且设定地址指针为00H
   DelayMs(15);           //延时大于10ms
   Write_Cmd(0x06);       //指定在资料的读取及写入时，设定游标的移动方向及指定显示的移位，光标从右向左加1位移动
   DelayUs(50);         //延时大于100us
}  

/*------------------------------------------------
                   显示字符串
x:横坐标值，范围0~8
y:纵坐标值，范围1~4
------------------------------------------------*/
void LCD_PutString(unsigned char x,unsigned char y,char *s)
{
 switch(y)
     {
      case 1: Write_Cmd(0x80+x);break;
      case 2: Write_Cmd(0x90+x);break;
      case 3: Write_Cmd(0x88+x);break;
      case 4: Write_Cmd(0x98+x);break;
      default:break;
     }
 while(*s>0)
   {
      Write_Data(*s);
      s++;
      DelayUs(100);  //
   }
}  

int main(void)
{  

    char* string1="12864LCD Demo";
    char* string2="Demo for Msp430";
    char* string3="Launch pad G2553";
    char* string4="电控》微电》哈哈》";
    WDTCTL = WDTPW + WDTHOLD;//关闭看门狗
    P1DIR=0xFF;//配置P1为输出，作为数据端口
    P2DIR=0xFF;//配置P2为输出，作为控制端口
    Init_ST7920();
    while(1)
    {  

        LCD_PutString(0,1,string1);
        DelayUs(20);
        LCD_PutString(0,2,string2);
        DelayUs(20);
        LCD_PutString(0,3,string3);
        DelayUs(20);
        LCD_PutString(0,4,string4);
        DelayUs(20);
    }
} 

串行驱动代码：

#include  "msp430g2553.h"  

#define CS1 P1OUT |=0x01
#define CS0 P1OUT &=0x01
#define SID1 P1OUT |=0x02
#define SID0 P1OUT &=~0x02
#define SCLK1 P1OUT |=0x04
#define SCLK0 P1OUT &=~0x04  

void DelayUs2x(unsigned char t)
{
 while(--t);
}  

void delay_1ms(unsigned char t)
{  

 while(t--)
 {
     //大致延时1mS
     DelayUs2x(245);
     DelayUs2x(245);
 }
}  

void sendbyte(unsigned char zdata)
{
    unsigned int i;  

    for(i=0; i<8; i++)
    {
        if((zdata << i) & 0x80)
        {
            SID1;
        }
        else
        {
            SID0;
        }
        SCLK0;
        SCLK1;
    }
}  

void write_com(unsigned char cmdcode)
{
    CS1;
    sendbyte(0xf8);   //1 1 1 1 RS RW 0   写操作RW=0 11111000写数据 11111010写指令
    sendbyte(cmdcode & 0xf0);
    sendbyte((cmdcode << 4) & 0xf0);
    delay_1ms(1);
    CS0;
}  

void write_data(unsigned char Dispdata)
{
    CS1;
    sendbyte(0xfa);
    sendbyte(Dispdata & 0xf0);
    sendbyte((Dispdata << 4) & 0xf0);
    delay_1ms(1);
    CS0;
}  

void Put_String(unsigned int x,unsigned int y,unsigned char* s)
{
     switch(y)
     {
      case 1: write_com(0x80+x);break;
      case 2: write_com(0x90+x);break;
      case 3: write_com(0x88+x);break;
      case 4: write_com(0x98+x);break;
      default:break;
     }
    while(*s>0)
   {
      write_data(*s);
      s++;
      DelayUs2x(50);
   }
}  

void lcdinit()
{
    delay_1ms(200);
    write_com(0x30);  //功能设定：基本指令集
    delay_1ms(20);
    write_com(0x0c);  //显示状态：整体显示，游标关
    delay_1ms(20);
    write_com(0x01);  //清空显示
    delay_1ms(200);
}  

int main( void )
{  

    WDTCTL = WDTPW + WDTHOLD; //关闭看门狗
    P1DIR=0xFF;
    P1OUT=0x00;
    lcdinit();
    while(1)
    {  

       Put_String(1,1,"speed");           

    }  

}