#include "msp430g2553.h"
#define uchar unsigned char
#define uint unsigned int
#define RS_1 P1OUT|=BIT3;//輸入數據
#define RS_0 P1OUT&=~BIT3;//輸入指令
#define RW_1 P1OUT|=BIT4;//寫入指令或者數據
#define RW_0 P1OUT&=~BIT4;//從lcd里面讀取數據
#define EN_1 P1OUT|=BIT5;//讀取信息
#define EN_0 P1OUT&=~BIT5;//下降沿時候執行指令
#define datt P2OUT;
uchar temp=0;
uchar  table1[]={"hello"};
uchar  table2[]={"hello"};

/*.................................................
 * 延時程序
.................................................. */

void delay(uint i)
{
uint j;
while(--i!=0)
{
for(j=0;j<255;j++);
}
}

/*.................................................
 * 忙信號檢查
.................................................. */

uchar chkbusy()
{
uchar busy;
P2OUT=0xf0;
EN_0;//讀取數據
RS_0;//輸入指令
RW_1;//寫入指令或者數據
EN_1;//讀取信息
busy=P2OUT&0x80;
delay(1);
EN_0;//下降沿執行指令
return(busy);
}

/*.................................................
 * 寫指令
.................................................. */

void writecom(uchar x,uchar comm)
{
//if(x) while(chkbusy());
EN_0;
RS_0;
RW_0;
EN_1;
P2OUT=(comm&0xf0);
delay(5);
EN_0;
delay(5);
EN_1;
P2OUT=(comm&0x0f)<<4;
delay(5);
EN_0;
}

/*.................................................
 * 寫數據
.................................................. */

void writedata(uchar dat)
{

//while(chkbusy()); //檢查忙信號
EN_0;
RS_1;
RW_0;
EN_1;
P2OUT=(dat&0xf0); //送高四位數據到P2口
delay(5);
EN_0;
delay(5);
EN_1;
P2OUT=(dat&0x0f)<<4; //送低四位數據到P2口
delay(5);
EN_0;
P2OUT=P2OUT|0x0f; //置低四位為1

}

/*.................................................
 * lcd初始化程序
.................................................. */

void lcdinit()
{
delay(30);
writecom(0,0x02);//數據指針清零
delay(5);
writecom(1,0x28);//
writecom(1,0x0c);//顯示光標開及設置
writecom(1,0x06);//顯示光標移動設置
writecom(1,0x01);//顯示清屏
delay(10);
}

/*.................................................
 * 在指定位置顯示一個字符，x為行，Y為列
.................................................. */

void displayone(uchar x,uchar y,uchar *n)
{
uchar add;
if (x == 1) add=0x80+y;
//writecom(1,add);
else add=0xc0+y;
writecom(1,add);
writedata(*n);
}

/*.................................................
 * 顯示字符串
.................................................. */

void displayleng(uchar x,uchar y,uchar *s)
{
y=y&0x0f;
while(*s)
{
displayone(x,y,s);
y++;
s++;
}
}

/*.................................................
 * 主函數
.................................................. */

void main()
{

 WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
    P2SEL=0x00;
    P2DIR = 0xff;
    P1DIR = 0x38;

lcdinit();
//lcdcls();

P2OUT=0xff;

writecom(1,0x01);
//writedata(0x01);
while(1)
{
displayleng(1,0,table1);
delay(100);
displayleng(2,1,table2);
}
}