tlcd.c

8位液晶屏LCM0825的点亮源代码

#include"iom8v.h"

void delay_1us(void)//延时，用于液晶
 {
   unsigned int i;
     for(i=1;i<10;i++);
 }

void data_0(unsigned int n)//传输N个0
{ int i;
   for(i=0;i<n;i++)
   {
   PORTD&=0x7F; delay_1us();//data=0
   PORTD&=0xBF;delay_1us();//wr=0
   PORTD|=0x40; delay_1us();//wr=1
   }
 }
 
 void data_1(unsigned int n)//传输N个1
{ int i;
   for(i=0;i<n;i++)
   {
   PORTD|=0x80;delay_1us();//data=1
   PORTD&=0xBF;delay_1us();//wr=0
   PORTD|=0x40;delay_1us();//wr=1
   }
 }
 
 void data_x(unsigned int x,unsigned int n)//传输X的前N位
 {int i;
 for(i=0;i<n;i++)
  { PORTD&=0x7F;//data=0,不影响传输为
 PORTD|=(x&0x80);delay_1us();//将CODE最高位给PD7
 PORTD&=0xBF;delay_1us();//wr=0
 PORTD|=0x40;delay_1us();//wr=1
 x=(x<<1);//CODE左移一位
 }
 }
void command_write(unsigned int command_code)
{
 int i;
 DDRD=0xf0; delay_1us();//PD4为CS，PD6为WR，PD7为DATA
 PORTD=0xff; delay_1us();
 
 PORTD&=0xEF; delay_1us();//cs=0
 
 data_1(1);//送1
 data_0(2);//送两个0
 data_x(command_code,8);//送八个CODE
 
 
 data_0(1);//送0
 
   PORTD|=0xC0; delay_1us();//WR=1;DATA=1 
   PORTD|=0x10; delay_1us();//cs=1
 
 
 }
 
 
 
 
 
 void data_write(unsigned int address,unsigned int data)
 {int i;
  DDRD=0xf0; delay_1us();//PD4为CS，PD6为WR，PD7为DATA
 PORTD=0xff; delay_1us();
 
 PORTD&=0xEF; delay_1us();//cs=0
 
 data_1(1);//送1
 data_0(1);//送0
 data_1(1);//送1
 data_0(1);//送0  
 data_x(address,5);//送5个ADDR
 data_x(data,4);//送4个DATA
   PORTD|=0xC0; delay_1us();//WR=1;DATA=1
   PORTD|=0x10; delay_1us();//cs=1
  }
  
    
 
 void main()
  {int i,j;
   
   
   	//延迟时间200毫秒
	for(i=0;i<10;i++)
   	   for(j=0;j<6000;j++);
  // 
  //液晶复位                         
    DDRD  |= 0xf0;                  //PD4-PD7输出
    PORTD |= 0xf0;                  //高电平 
					 
  
  
  command_write(0x29);
   command_write(0x18);
   command_write(0x01);
   command_write(0x03);
  
 while(1)
   {
	data_write(0x00,0x60);//显示9
   data_write(0x08,0xc0);
   }
   
  
	}