lcddriver.c

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#include<AT89X52.h>

#define uchar unsigned char 

#define DISP_ON 0x3f
#define DISP_OFF 0x3e
#define COL_ADD 0x40
#define PAGE_ADD 0xb8
#define START_LINE 0xc0
#define LCD_BUS P0

sbit MCS=P2^0;
sbit SCS=P2^1;
sbit DI=P2^2;
sbit RW=P2^3;
sbit ENABLE=P2^4;
sbit LCD_RST=P2^5;

void Delay(uchar t)
{
  uchar i,j;
  for(i=0;i<t;i++)
  for(j=0;j<10;j++)
  ;
}

void Write_Command(uchar cmd_code)
{
  DI=0;
  RW=0;
  LCD_BUS=cmd_code;
  Delay(0);
  ENABLE=1;
  Delay(0);
  ENABLE=0;
}

void Write_Data(uchar Disp_Data)
{
  DI=1;
  RW=0;
  LCD_BUS=Disp_Data;
  Delay(0);
  ENABLE=1;
  Delay(0);
  ENABLE=0;
}

void Clear_Scran()
{
  uchar j,k;
  MCS=1; SCS=1;
  Write_Command(PAGE_ADD+0);
  Write_Command(COL_ADD+0);
  for(k=0;k<8;k++)
  {
     Write_Command(PAGE_ADD+k);
     Write_Command(COL_ADD+0);
     for(j=0;j<64;j++)
     Write_Data(0x00);
  }
}


void Initial_LCD(void)
{
  LCD_RST=0;
  Delay(100);
  LCD_RST=1;
  Delay(100);
  MCS=1;
  SCS=1;
  Delay(100);
  Write_Command(DISP_OFF);
  Write_Command(PAGE_ADD+0);
  Write_Command(START_LINE+0);
  Write_Command(COL_ADD+0);
  Write_Command(DISP_ON);
}

void Disp_Line(uchar page)
{
  uchar i;
  MCS=1;
  SCS=1;
  Write_Command(DISP_ON);
  Write_Command(PAGE_ADD);
  Write_Command(START_LINE);
  Write_Command(COL_ADD);
//  for(j=0;j<8;j++)
//  {
    Write_Command(PAGE_ADD+page);
    Write_Command(COL_ADD+0);
    for(i=0;i<64;i++)
      Write_Data(0x80);
//  }
}

void HZK_Disp8(uchar page,uchar col,uchar code *hzk)
{
  uchar i;
  Write_Command(PAGE_ADD+page);
  Write_Command(COL_ADD+col);
  for(i=0;i<8;i++)
  {
    Write_Data(hzk[i]);
  }
}

void HZK_Disp16(uchar page,uchar col,uchar code *hzk)
{
  uchar i,j;
  for(j=0;j<2;j++)
  {
    Write_Command(PAGE_ADD+page+j);
    Write_Command(COL_ADD+col);
    for(i=0;i<16;i++)
    {
      Write_Data(hzk[16*j+i]);
    }
  }
}


void LCD_MCS()
{
  MCS=1;
  SCS=0;
}

void LCD_SCS()
{
  MCS=0;
  SCS=1;
}