lcd.c

MSP430 for lcd driver

//******************************************************************************
//ZhaoZhendong                                                                  
//Lierda, Inc
//July 2004
//Built with IAR Embedded Workbench Version: 3.20A
//******************************************************************************

#include "LCD_DEFINE.H"

void lcd_init(void)
{
  LCD_DATA_OUT = 0x00;
  LCD_DATA_DIR = 0xFF;
  LCD_CON_OUT = LCD_CS1+LCD_CS2+LCD_RST;
  LCD_CON_DIR |= LCD_DI+LCD_RW+LCD_EN+LCD_CS1+LCD_CS2+LCD_RST;
  LCD_CON_OUT &= ~LCD_RST;
  _NOP();
  _NOP();
  
  LCD_CON_OUT |= LCD_EN;
  _NOP();
  _NOP();
  
  LCD_CON_OUT &= ~LCD_EN;
  _NOP();
  _NOP();
  
  LCD_CON_OUT |= LCD_RST;
  _NOP();
  _NOP();
}

void write_command(unsigned char command)
{
  LCD_DATA_DIR = 0xFF;
  LCD_CON_OUT |= LCD_CS1 + LCD_CS2;
  LCD_CON_OUT &= ~(LCD_RW + LCD_DI);
  LCD_DATA_OUT = command;
  LCD_CON_OUT |= LCD_EN;
  LCD_CON_OUT &= ~LCD_EN;
}

void write_data( unsigned char data, unsigned char CS1, unsigned char CS2 )
{
  LCD_DATA_DIR = 0xFF;
	
  if(CS1) LCD_CON_OUT |= LCD_CS1;
  else LCD_CON_OUT &=~LCD_CS1;
	
  if(CS2) LCD_CON_OUT |= LCD_CS2;
  else LCD_CON_OUT &=~LCD_CS2;
	
  LCD_CON_OUT |= LCD_DI;
  LCD_CON_OUT &=~LCD_RW;
  LCD_DATA_OUT  = data;
  LCD_CON_OUT |= LCD_EN;
  LCD_CON_OUT &=~LCD_EN;
}

void clear_lcd(void)
{
  unsigned char i,j;
  for(i=0;i<8;i++)
  {
   write_command(SET_X|i);
   write_command(SET_Y);
   for(j=0;j<128;j++)
   {
    if(j<=63)write_data(0,1,0);
    else write_data(0,0,1);
    _NOP();
   }
  }
}

void display( unsigned char *chr, unsigned char nRow, unsigned char nCol,
                 unsigned char highth,unsigned char wideth )
//*chr 显示数据的地址，nRow 在显示屏上第几行，nCol 在显示屏上第几列
//highth  字体的高度，wideth 字体的宽度
//128*64有8行，128列                
{
  unsigned char i,tmpCol,tmpRow,h,m;
  unsigned int j=0;
  tmpRow = nRow;
  m=0;
  for(h=0;h<highth;h=h+8)
  {
    
    write_command(SET_X|tmpRow);
    tmpCol=nCol;
    for(i=0;i<wideth;i++)
    {
      if(tmpCol<64)
      {write_command(SET_Y|tmpCol);write_data(chr[i+j],1,0);}
      else 
      {write_command(SET_Y|(tmpCol-64));write_data(chr[i+j],0,1);}
      tmpCol++;
    }
    m++;
    j=m*wideth;
    tmpRow++;
  }
}