lcd12232_cn.c

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/*********************************************
 example program for PIC download board
 16F877A @3.6864MHz
 test LCD 1602
 www.mcufan.com
*********************************************/
#include	<pic.h>
#define LCD_E_SET           PORTB |= 0x20     //PB5
#define LCD_E_CLR           PORTB &= ~0x20
#define LCD_RS_SET          PORTB |= 0x10			//PB4
#define LCD_RS_CLR          PORTB &= ~0x10
__CONFIG(WDTDIS & HS & LVPDIS & DEBUGDIS);

unsigned char line1[16],line2[16];

void delay5ms()
{
	register int i;
	for (i=0;i<4000;i++)
	;
}

void delay50us()
{
	register int i;
	for (i=0;i<100;i++)
	;
}

wr_com_8(unsigned char comm)
{
		unsigned char pb;
		LCD_E_CLR;
		LCD_RS_CLR;
 	 
		LCD_E_SET;
		pb=PORTB;
//		pb=pb&0x0F;
//		pb +=comm&0xF0;
		pb=pb&0xF0;
		pb +=comm&0x0F;
		PORTB =pb;
		LCD_RS_CLR;
 		 
		LCD_E_CLR;
}

wr_data_8(unsigned char dat)
{
		unsigned char pb;
		LCD_E_CLR;
		LCD_RS_CLR;
  
		LCD_RS_SET;
 	 
		LCD_E_SET;
		pb=PORTB;
		pb=pb&0xF0;
		pb +=dat&0x0F;
		PORTB =pb;

  		LCD_E_CLR;
		LCD_RS_CLR;
 	 
}

wr_com(unsigned char comm)
{
		unsigned char i;
		unsigned char pb;
		i=(comm>>4)&0x0f;//i=comm&0xf0;
		LCD_E_CLR;
		LCD_RS_CLR;
 	 
		LCD_E_SET;
		pb=PORTB;
		pb=pb&0xF0;
		pb +=i&0x0F;
		PORTB =pb;

		
		LCD_RS_CLR;
	 
		LCD_E_CLR;

		LCD_E_SET;
		i=comm&0x0f;
		pb=PORTB;
		pb=pb&0xF0;
		pb +=i&0x0F;
		PORTB =pb;


		LCD_E_CLR;
		LCD_RS_CLR;
		 
}

wr_data(unsigned char dat)
{
		unsigned char i;
		unsigned char pb;
		i=(dat>>4)&0x0f;
		LCD_E_CLR;
		LCD_RS_CLR;
		 
		LCD_RS_SET;
		 
		LCD_E_SET;
		
		pb=PORTB;
		pb=pb&0xF0;
		pb +=i&0x0F;
		PORTB =pb;

  		LCD_E_CLR;

  		i=dat&0x0f;
  		LCD_E_SET;
  		
  		pb=PORTB;
		pb=pb&0xF0;
		pb +=i&0x0F;
		PORTB =pb;

		LCD_E_CLR;
		LCD_RS_CLR;
		 
}


unsigned char rd_bf()
{

}
	
void init()
{
	
	
	unsigned char in,i;
	
	
	
		wr_com_8(0x03);
	delay5ms();
	wr_com_8(0x03);
	delay5ms();
	wr_com_8(0x03);
	delay5ms();
	
	delay5ms();
/*	wr_com(0x01);
	delay5ms();
	
	delay5ms();
	wr_com(0x06);
	delay5ms();
	
	delay50us();	*/
	wr_com(0x28);
	delay50us();
	
	delay50us();
	wr_com(0x0c);
	delay50us();
	
	delay50us();
	
	wr_com(0x40);		
	delay50us();
	





}



/*系统各输入输出口初始化子程序*/
void		initial_port()
{
	TRISB=0x00;			/*B口设置为输出*/
	INTCON=0x00;			/*关闭所有中断*/

}	


display_162()
{
			unsigned char in,i;
		wr_com(0x80);		
		delay50us();
		delay50us();
		
		in=rd_bf();
		delay50us();
		delay50us();
	
		for(i=0;i<16;i++)
		{
			wr_data(line1[i]);		//display "0"
			delay50us();
			in=rd_bf();
		}
		in=rd_bf();
		delay50us();
		wr_com(0x90);
		delay50us();
		in=rd_bf();
		delay50us();
		for(i=0;i<16;i++)
		{
			wr_data(line2[i]);		//display "0"
			delay50us();
			in=rd_bf();
		}
}
main()
{
	unsigned char in,i,da;
	
	delay5ms();
	initial_port();		
	init();	
		

	while(1)
	{
				line1[0]=0xb5;
				line1[1]=0xa5;		
				line1[2]=0xc6;
				line1[3]=0xac;
				line1[4]=0xbb;
				line1[5]=0xfa;
				line1[6]=0xb0;		 
				line1[7]=0xae;
				line1[8]=0xba;
				line1[9]=0xc3;
				line1[10]=0xd5;
				line1[11]=0xdf;		 
				line1[12]=0xcd;
				line1[13]=0xf8;
				line1[14]=0x20;
				line1[15]=0x20;
				
				line2[0]=0x20;
				line2[1]=0x20;
				line2[2]=0x20;
				line2[3]=0x20;
				line2[4]=0xbb;
				line2[5]=0xb6;
				line2[6]=0xd3;
				line2[7]=0xad;
				line2[8]=0xc4;
				line2[9]=0xfa;
				line2[10]=0x20;
				line2[11]=0x20;
				line2[12]=0x20;
				line2[13]=0x20;
				line2[14]=0x20;
				line2[15]=0x20;
			
				display_162();	
	}
}