lcd.c

一个基于华邦W65132的LCD程序,48*112点阵.

#include <mega16.h>
#include <delay.h>
#include <head_lcd.h>
#include <tab_char.h>  

unsigned char change_char(unsigned char char_x)
{                    
  unsigned char tab_temp[8]; 
  unsigned char temp;
   
  tab_temp[0]=(char_x&0x80)>>7;
  tab_temp[1]=(char_x&0x20)>>4;
  tab_temp[2]=(char_x&0x08)>>1;
  tab_temp[3]=(char_x&0x02)<<2;
  tab_temp[4]=(char_x&0x01)<<4;
  tab_temp[5]=(char_x&0x04)<<3;
  tab_temp[6]=(char_x&0x10)<<2;
  tab_temp[7]=(char_x&0x40)<<1;  
  
  temp=(tab_temp[0]|tab_temp[1]|tab_temp[2]|tab_temp[3]|tab_temp[4]|tab_temp[5]|tab_temp[6]|tab_temp[7]);
  return(temp);
}

//8*8 char font
//112*48,line:6(0-5),row:14(0-13)
void written_char(unsigned char line,unsigned char row,unsigned char char_data) 
{ 
 unsigned int Address_master,Address_slave;
 unsigned int Address_slave_x;
 unsigned char Address_tab[3];
 unsigned char i,j;

  if(row<8)
   {   
     for(i=0;i<8;i++)
     { 
      Address_master =((unsigned int)(8*line+i)*32+7-row); 
      Address_slave  =((unsigned int)(8*line+i)*32+6+row);
 
      Address_tab[0]=(unsigned char)((Address_master>>4)&0xf0)|(unsigned char)(Address_slave>>8); 
      Address_tab[1]=(unsigned char)((Address_master&0xf0))|(unsigned char)((Address_slave>>4)&0x0f); 
      Address_tab[2]=(unsigned char)((Address_master<<4)&0xf0)|(unsigned char)(Address_slave&0x0f); 
      
        RAM_ADRESS=0;
      for(j=0;j<3;j++)
       { 
         RAM_WRITTEN=0; 
         PORTC=Address_tab[j];
         RAM_WRITTEN=1;
        }

         RAM_ADRESS=1;
         RAM_WRITTEN=0;
         PORTC=change_char(tab_char[char_data][i]);
         RAM_WRITTEN=1;
      }
    }
  
  else
    {       
      for(i=0;i<8;i++)        //从机上行显示
       { 
        Address_slave   =((unsigned int)(8*line+i)*32+6+row);
     
        Address_tab[0]=(unsigned char)((Address_slave>>8)); 
        Address_tab[1]=(unsigned char)((Address_slave>>4)); 
        Address_tab[2]=(unsigned char)((Address_slave&0x0f));
        
        RAM_ADRESS=0;
        
       for(j=0;j<3;j++)
         { 
         RAM_WRITTEN=0; 
         PORTC=Address_tab[j];
         RAM_WRITTEN=1;
          }

         RAM_ADRESS=1;
         RAM_WRITTEN=0;
         PORTC=(change_char(tab_char[char_data][i]));
         RAM_WRITTEN=1; 
      }
     
      for(i=0;i<8;i++)       //从机下行显示
       { 
        Address_slave_x =((unsigned int)(8*line+i)*32+13-row);

        Address_tab[0]=(unsigned char)(Address_slave_x>>8); 
        Address_tab[1]=(unsigned char)(Address_slave_x>>4); 
        Address_tab[2]=(unsigned char)(Address_slave_x&0x0f);   
         
        RAM_ADRESS=0;

       for(j=0;j<3;j++)
        { 
         RAM_WRITTEN=0; 
         PORTC=Address_tab[j];
         RAM_WRITTEN=1;
         }

         RAM_ADRESS=1;
         RAM_WRITTEN=0;
         PORTC=((change_char(tab_char[char_data][i]))>>4);
         RAM_WRITTEN=1;
      }
   }      
}
 
void lcd_init(void)    //初始化LCD
{
   unsigned char init_tab[3]  ={0xaa,0x0,0x0};
   unsigned char init_data[6] ={0x22,0xee,0x77,0xcc,0x66,0x0};
 //unsigned char init_data[6] ={0x0,0xcc,0x66,0xcc,0x44,0x0};  //other init data
   unsigned char i;

    RAM_EN=0;
    
    RAM_ADRESS=0;
    for(i=0;i<3;i++)
     { 
      RAM_WRITTEN=0; 
      PORTC=init_tab[i];
      RAM_WRITTEN=1;
      }

    RAM_ADRESS=1;
    for(i=0;i<6;i++)
     { 
       RAM_WRITTEN=0; 
       PORTC=init_data[i];
       RAM_WRITTEN=1;
      }
}

void clear_display(void)
{
  unsigned char i,j,k;
  for(i=0;i<6;i++)
   {                      
     for(j=0;j<14;j++)
      { 
        for(k=0;k<8;k++)
          { 
            written_char(i,j,Char_nop);
           }
       }
    } 
}  

void main(void)    //主函数
{  
unsigned int i; 

PORTC=0x00;        //PORT ininteally
DDRC=0xff;

PORTB=0x00;
DDRB=0x3F;   

POWER_EN=1;        //stand moudle,all output pin to gnd level
POWER_EN=0;        //OPEN POWER FOR IC
light=1;           //LCD's light open
lcd_init();        //初始化LCD
clear_display();   //清除LCD上的所有数据

  while(1)          
   {
       for(i=0;i<62;i++)
       {
       written_char(3,3,i); 
       delay_ms(1000);
        }  
   }
}