lad 2.c

来自「主要用于LCD-----HT1622驱动程序」· C语言 代码 · 共 184 行

#include	<p18f452.h>

#pragma config OSC = HS, OSCS = OFF
#pragma config PWRT = OFF
#pragma config BOR = OFF
#pragma config WDT = OFF
#pragma config CCP2MUX = OFF
#pragma config LVP = OFF

#define unchar unsigned char
#define wr1622_Wr  PORTDbits.RD1    //WR
#define wr1622_Dt  PORTDbits.RD0    //DATA
#define wr1622_Cs   PORTCbits.RC4

void wr_b(unchar add,unchar data);//字符地址
void wr_ID(unchar id);//写ID
void display_all(void);//全显
void disply_no(void);//全不显
void initialization(void);//初始化屏幕
void wr_command(unchar command);//写命令

void main()
{
     initialization();//初始化屏幕
     wr_ID(0x80);//写ID
     wr_command(0x03);//写命令
   //display_all();//全显
   //disply_no();//全不显
}

void wr_b(unchar add,unchar data)//字符地址
{// add-0-36;data-2-16;
    unchar kk,jj;
    wr1622_Wr=0;
    for(kk=0;kk<6;kk++)
       {
          	wr1622_Wr=0;
           if((add&0x20)==0x20)
              wr1622_Dt=1;
           else
              wr1622_Dt=0;
            _asm 
             NOP
             NOP
             NOP
            _endasm
           wr1622_Wr=1;
            _asm 
             NOP
             NOP
             NOP
            _endasm
           wr1622_Wr=0;
           add<<=1;
        }	  
    for(jj=0;jj<4;jj++)
       {
          	wr1622_Wr=0;
           if((data&0x01)==0x01)
              wr1622_Dt=1;
           else
              wr1622_Dt=0;
            _asm 
             NOP
             NOP
             NOP
            _endasm
           wr1622_Wr=1;
            _asm 
             NOP
             NOP
             NOP
            _endasm
           wr1622_Wr=0;
           data>>=1;
        }
    wr1622_Wr=0;
}

void wr_ID(unchar id)//写ID
{
   unchar i;
   wr1622_Wr=0;
   for(i=0;i<3;i++)
      {
	      if((id&0x80)==0x80)
	         wr1622_Dt=1;
          else 
             wr1622_Dt=0;
            _asm 
             NOP
             NOP
             NOP
            _endasm
           wr1622_Wr=1;
            _asm 
             NOP
             NOP
             NOP
            _endasm
            wr1622_Wr=0;
           id<<=1;
       }
   wr1622_Wr=0;    
}

void display_all(void)//全显
{
	unchar i;
	wr1622_Cs=0;
    for(i=0;i<96;i++)
       {
            wr_ID(0xa0);
            wr_b(i,2);
        } 
     wr1622_Wr=0;    
}

void disply_no(void)//全不显
{
	unchar i;
	wr1622_Cs=0;
    for(i=0;i<96;i++)
       {
	        wr_ID(0xa0);
            wr_b(i,0); 
        }     
     wr1622_Wr=0;
} 
     
void initialization(void)//初始化屏幕
{   
	TRISDbits.TRISD0=0;
    TRISDbits.TRISD1=0;
    TRISCbits.TRISC4=0;	 
    wr1622_Cs=1;
    _asm 
     NOP
     NOP
     NOP
    _endasm
    wr1622_Cs=0;
    wr1622_Wr=0;
    wr_ID(0x80);
    wr_command(0x01);//打开系统振荡器
    wr_command(0x03);//打开LCD偏置发生器
    wr_command(0x29);//1/4 duty,1/3 bias 
    _asm
     NOP
     NOP
     NOP
    _endasm
    wr1622_Cs=1;
    wr1622_Cs=0;
    wr1622_Wr=0;
}

void wr_command(unchar command)//写命令
{
    unchar i;
    wr1622_Wr=0;
    for(i=0;i<9;i++)
       {
            if((command&0x80)==0x80)
              wr1622_Dt=1;
            else 
              wr1622_Dt=0;
            _asm 
               NOP
               NOP
               NOP
           _endasm
            wr1622_Wr=1;
           _asm 
               NOP
               NOP
               NOP
          _endasm
            wr1622_Wr=0;
            command<<=1;
        }
    wr1622_Wr=0;
 }