dgl.bak

lcd208*80点阵的,ic为爱普生的D15721E,lcd驱动程序.

#include <reg52.h>


sbit   CS=P1^0;
sbit  RES=P1^1;
sbit   A0=P1^2;
sbit  SCL=P1^3;
sbit   SI=P1^4;


void Delay(unsigned int i)
{
  unsigned int c;

  while(i--)
    {
     c=1000 ;
     while(c--);      

    }

}

void SpisendData(char c)
{
  unsigned char i;

 CS=0;
 A0=1;

 for(i=0x80;i>0;i=i>>1)
   {
    SCL=0;
    SI=(i&c);
    SCL=1;
   }
 CS=1;

}

void SpisendCode(char c)
{
 unsigned char i;  

 CS=0;
 A0=0;

 for(i=0x80;i>0;i=i>>1)
   {
    SCL=0;
    SI=(i&c);
    SCL=1;
   }
 CS=1;
 
}

void LcdInitial()
{
 RES=0;
 Delay(30);
 RES=1; 
SpisendCode(0xae);Delay(1);  //display off也是reset后默认的
SpisendCode(0xa6);Delay(1);  //display normal也是reset后默认的 
SpisendCode(0xa4);Delay(1);  //full display 也是reset后默认的
SpisendCode(0xc4);Delay(1);  //Common Output Status Select,default:normal
SpisendCode(0xa0);Delay(1);  //Column Address Set Direction:default:normal

SpisendCode(0x66);Delay(1);  //mode and dummy perial select:00,also default
SpisendData(0x00);Delay(1);

SpisendCode(0x39);Delay(1);  //Gray-scale Pattern Set 
SpisendData(0x01);Delay(1);  //选白色

SpisendCode(0x6d);Delay(1);    //Display Line Number Set
SpisendData(0x13);Delay(1);   //total 81 lines,also default,xxxxxxxxxxxxxxx     
SpisendData(0x00);Delay(1);   //start line

SpisendCode(0xe7);Delay(1);   // MLS drive selection
SpisendData(0x0b);Delay(1);   //


SpisendCode(0x36);Delay(1);  //nline inverted:n=4,also default;
SpisendData(0x00);Delay(1);
SpisendCode(0xe5);Delay(1);//n-line Inverting Drive ON/OFF,default is off,now is on


SpisendCode(0x5f);Delay(1);   //frequence select
SpisendData(0x08);Delay(1);   //not the defalut,fcl=171khz,ffr=81hz
SpisendCode(0xab);Delay(1);  //os on


SpisendCode(0x2b);Delay(1);  //adjust v3
SpisendData(0x07);Delay(1);  //v3:9~16
SpisendCode(0x81);Delay(1);  //v3 volume

SpisendCode(0x4e);Delay(1);  //Temperature Gradient Set :use default
SpisendData(0x00);Delay(1);  
SpisendCode(0x28);Delay(1);  //Thermal sensor ON/OFF:is off

SpisendData(0x7f);Delay(1);  //alfa=128?127
SpisendCode(0xa2);Delay(1);  //lcd bias
SpisendData(0x00);Delay(1);  //  1/8

SpisendCode(0x25);Delay(1);  //power control,mode set
SpisendData(0x04);Delay(1);
SpisendData(0x06);Delay(1);
SpisendData(0x07);Delay(1);
}





void main()
{
 char i=255,a=2;
LcdInitial();



}