lcd.c

来自「凌阳控制AD2543」· C语言 代码 · 共 123 行

#include <SPCE061A.h>

extern void chn_disp(unsigned char ch_long,unsigned char *chn);
extern void wr_lcd (unsigned char dat_comm,unsigned char content);
extern void delay (unsigned long int us);
extern void init_lcd (void);

//#define cs    IOB0  4  change to     IOA8
//#define data  IOB1  5  change to     IOA9
//#define clk   IOB2  6  change to     IOA10

#define comm  0
#define dat   1

/*------------------初始化-----------------*/
void init_lcd (void)
{
  wr_lcd (comm,0x30);              //30---基本指令动作
  wr_lcd (comm,0x01);              //清屏，地址指针指向00H
  delay (80);
  wr_lcd (comm,0x06);              //光标的移动方向
  wr_lcd (comm,0x0c);              //开显示，关游标
}

/*-------显示一段长为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;
  set_IOA(8);     //*P_IOB_Data |= 0x0001;//cs=1;
   
  clr_IOA(10);     //*P_IOB_Data &= 0xfffb;//sclk=0;
   
  set_IOA(9);      //*P_IOB_Data |= 0x0002;//std=1;
   
  for(i=0;i<5;i++)
  {
     set_IOA(10);  //*P_IOB_Data |= 0x0004;//sclk=1;
      
     clr_IOA(10);  //*P_IOB_Data &= 0xfffb;//sclk=0;
      
  }
  clr_IOA(9);     //*P_IOB_Data &= 0xfffd;//std=0;
   
   set_IOA(10);   // *P_IOB_Data |= 0x0004;//sclk=1;
      
    clr_IOA(10); // *P_IOB_Data &= 0xfffb;//sclk=0;
      
  if(dat_comm)
     set_IOA(9); //*P_IOB_Data |= 0x0002;//std=1;   //data
  else
     clr_IOA(9); // *P_IOB_Data &= 0xfffd;//std=0;  //command
      
      set_IOA(10);  //*P_IOB_Data |= 0x0004;//sclk=1;
      
     clr_IOA(10);  //*P_IOB_Data &= 0xfffb;//sclk=0;
      
     clr_IOA(9);   //*P_IOB_Data &= 0xfffd;//std=0;
      
     set_IOA(10);  //*P_IOB_Data |= 0x0004;//sclk=1;
      
     clr_IOA(10);  //*P_IOB_Data &= 0xfffb;//sclk=0;
      
  for(j=0;j<2;j++)
  {
    for(i=0;i<4;i++)
    {
      if (a & 0x80 )
      	  set_IOA(9); //*P_IOB_Data |= 0x0002;//std=1;
      else 
          clr_IOA(9);  //*P_IOB_Data &= 0xfffd;//std=0;
          
      set_IOA(10);  //*P_IOB_Data |= 0x0004;//sclk=1;
      
     clr_IOA(10);  //*P_IOB_Data &= 0xfffb;//sclk=0;
      
     a = a * 2;
    }
        clr_IOA(9); //  *P_IOB_Data &= 0xfffd;//std=0;
          
    for(i=0;i<4;i++)
    {
       set_IOA(10);  //*P_IOB_Data |= 0x0004;//sclk=1;
      
     clr_IOA(10);  //*P_IOB_Data &= 0xfffb;//sclk=0;
      
    }
  }
}
/*---------------------------------------*/
void delay (unsigned long int us)   //delay time
{
  
  while(us--)
  *P_Watchdog_Clear=1;
}

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