#include <SPCE061A.h>
#define x     0x80
#define y     0x80
#define comm  0
#define dat   1
//#define cs    IOB0
//#define data  IOB1
//#define clk   IOB2
volatile unsigned int *P_WatchDog_Clear = (unsigned int*)(0x7012);
void chn_disp(unsigned char ch_long,unsigned char *chn);
void wr_lcd (unsigned char dat_comm,unsigned char content);
void delay (unsigned long int us);

unsigned char tab1[]={
"青島大學電工中心"
"QD    University"                  //開機畫面
};

/*------------------初始化-----------------*/
void init_lcd (void)
{
  wr_lcd (comm,0x30);              //30---基本指令動作
  wr_lcd (comm,0x01);              //清屏，地址指針指向00H
  delay (80);
  wr_lcd (comm,0x06);              //光標的移動方向
  wr_lcd (comm,0x0c);              //開顯示，關游標
}

/*-------顯示一段長為CH--LONG的字符串---------*/
void chn_disp(unsigned char ch_long,unsigned char *chn)
{
  unsigned char i;
  wr_lcd (comm,0x30);
  for (i=0;i<ch_long;i++)
  wr_lcd (dat,chn[i]);
}

/*--------------清DDRAM------------------*/
void clrram (void)
{
  wr_lcd (comm,0x30);
  wr_lcd (comm,0x01);
  delay (120);
}
/*---------------------------------------*/
void wr_lcd (unsigned char dat_comm,unsigned char content)
{
  unsigned char a,i,j;
  delay (40);
  a=content;
  *P_IOB_Dir = 0xffff;    
  *P_IOB_Attrib = 0xffff;
  *P_IOB_Data = 0x0000;
  *P_IOB_Data |= 0x0001;//cs=1;
   
  *P_IOB_Data &= 0xfffb;//sclk=0;
   
  *P_IOB_Data |= 0x0002;//std=1;
   
  for(i=0;i<5;i++)
  {
     *P_IOB_Data |= 0x0004;//sclk=1;
      
     *P_IOB_Data &= 0xfffb;//sclk=0;
      
  }
  *P_IOB_Data &= 0xfffd;//std=0;
   
          *P_IOB_Data |= 0x0004;//sclk=1;
      
     *P_IOB_Data &= 0xfffb;//sclk=0;
      
  if(dat_comm)
    *P_IOB_Data |= 0x0002;//std=1;   //data
  else
     *P_IOB_Data &= 0xfffd;//std=0;  //command
      
      *P_IOB_Data |= 0x0004;//sclk=1;
      
     *P_IOB_Data &= 0xfffb;//sclk=0;
      
     *P_IOB_Data &= 0xfffd;//std=0;
      
      *P_IOB_Data |= 0x0004;//sclk=1;
      
     *P_IOB_Data &= 0xfffb;//sclk=0;
      
  for(j=0;j<2;j++)
  {
    for(i=0;i<4;i++)
    {
      if (a & 0x80 )
      	 *P_IOB_Data |= 0x0002;//std=1;
      else 
         *P_IOB_Data &= 0xfffd;//std=0;
          
      *P_IOB_Data |= 0x0004;//sclk=1;
      
     *P_IOB_Data &= 0xfffb;//sclk=0;
      
     a = a * 2;
    }
        *P_IOB_Data &= 0xfffd;//std=0;
          
    for(i=0;i<4;i++)
    {
     *P_IOB_Data |= 0x0004;//sclk=1;
      
     *P_IOB_Data &= 0xfffb;//sclk=0;
      
    }
  }
}
/*---------------------------------------*/
void delay (unsigned long int us)   //delay time
{
  while(us--);
}

void delay2()           //延時程序
{unsigned char i;
 for(i=300;i>0;i--);
 }


/*------------------主程序--------------------*/
int main()
{
  *P_SystemClock = 0x0020;   //PLL:20.48MHz  CPU:20.48MHz	
  *P_IOB_Dir = 0xffff;    
  *P_IOB_Attrib = 0xffff;  //why it must be ffff and not 0000
  *P_IOB_Data = 0x0000;	
  init_lcd ();
 while(1)
 {
  wr_lcd(comm,0x80);
  chn_disp(16,tab1);
  wr_lcd(dat,'0');
  wr_lcd(dat,'0');
  //delay(100000);
  //*P_WatchDog_Clear = 0x0001;  how to clear it?
  // delay(100000);
   // clrram();
//delay(100000);
  *P_WatchDog_Clear =0x0001;
 //delay(100000);
 }
}