)
/*Để LCD thực thi các lệnh điều khiển:*/ RS = 0; //chọn thanh ghi lệnh R/W = 0; //ghi dữ liệu, R/W = 1;//đọc dữ liệu E= 1; //đưa chân E lên mức cao E= 0; //tạo sườn xuống để chốt dữ liệu /*Để LCD thực thi các lệnh hiển thị:*/ RS = 1; //chọn thanh ghi dữ liệu R/W = 0; //ghi dữ liệu E = 1; //đưa chân E lên mức cao E = 0; //tạo sườn xuống để chốt dữ liệu
falleaf
nhh/*-----------------------------------------------------------------------------
* Author : nhh
* Date : 05/04/06
* Hardware : PIC16F877A
* Compiler : CCS C 3.249
* Description : Hien thi LCD
*=============================================================================*/
#include <16F877A.h>
#include <DEFS_16F877A.h>
#fuses XT,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4000000)
#define RS RD0
#define RW RD1
#define E RD2
#define LCD PORTB
/*Ham yeu cau goi lenh dieu khien LCD*/
void comnwrt(void)
{
RS = 0;
RW = 0;
E = 1;
E = 0;
delay_ms(1);
}
/*Ham yeu cau goi du lieu hien thi len LCD*/
void datawrt(void)
{
RS = 1;
RW = 0;
E = 1;
E = 0;
delay_ms(1);
}
/*Ham main*/
void main(void)
{
set_tris_B(0);
set_tris_D(0);
delay_ms(100); // Tao tre 100ms cho LCD khoi dong
LCD = 0x38; // Hai hang, ma tran dot 5*7, 8 bit interface
comnwrt();
LCD = 0x0C; // Bat hien thi, tat con tro
comnwrt();
LCD = 0x85; // Vi tri hang 1,cot 6
comnwrt();
LCD = 'B'; // Xuat dong chu "BE YEU" ra LCD
datawrt();
LCD = 'E';
datawrt();
LCD = ' ';
datawrt();
LCD = 'Y';
datawrt();
LCD = 'E';
datawrt();
LCD = 'U';
datawrt();
LCD = '!';
datawrt();
}
/*-----------------------------------------------------------------------------
* Author : nhh
* Date : 05/04/06
* Hardware : PIC16F877A
* Compiler : CCS C 3.249
* Description : Hien thi LCD
*=============================================================================*/
#include <16F877A.h>
#include <DEFS_16F877A.h>
#fuses XT,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4000000)
#define RS RD0
#define RW RD1
#define E RD2
#define LCD PORTB
const unsigned char key[]="HELLOPICVIETNAM!";
int i = 0;
/*Ham yeu cau goi lenh dieu khien LCD*/
void comnwrt(void)
{
RS = 0;
RW = 0;
E = 1;
E = 0;
delay_ms(1);
}
/*Ham yeu cau goi du lieu hien thi len LCD*/
void datawrt(void)
{
RS = 1;
RW = 0;
E = 1;
E = 0;
delay_ms(1);
}
/*Ham main*/
void main(void)
{
set_tris_B(0);
set_tris_D(0);
delay_ms(100); // Tao tre 100ms cho LCD khoi dong
LCD = 0x38; // Hai hang, ma tran dot 5*7, 8 bit interface
comnwrt();
LCD = 0x0C; // Bat hien thi, tat con tro
comnwrt();
LCD = 0x86; // Vi tri hang 1,cot 7
comnwrt();
while(true)
{
LCD = key[i];
datawrt();
delay_ms(100);
i++;
if(i==5) // Hien thi xong HELLO
{
LCD = 0xC3; // Vi tri hang 2,cot 4
comnwrt();
delay_ms(100);
}
if(i==16) // Hien thi xong PICVIETNAM!
{
delay_ms(1100);
LCD = 0x01; // Xoa man hinh hien thi
comnwrt();
delay_ms(500);
LCD = 0x86; // Vi tri hang 1,cot 7
comnwrt();
i = 0;
}
}
}
/*-----------------------------------------------------------------------------
* Author : nhh
* Date : 05/14/06
* Hardware : PIC16F877A
* Compiler : CCS C 3.249
* Description : Hien thi LCD
*=============================================================================*/
#include <16F877A.h>
#include <DEFS_16F877A.h>
#fuses XT,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4000000)
#define use_portb_lcd TRUE
#include <lcd.c>
void main(void)
{
delay_ms(100); // tao tre 100ms cho LCD khoi dong
lcd_init();
lcd_gotoxy(7,1); // vi tri (x,y)=(7,1)= hang 1, cot 7
lcd_putc('H');
lcd_putc('I');
lcd_putc('!');
}
/*-----------------------------------------------------------------------------
* Author : nhh
* Date : 05/04/06
* Hardware : PIC16F877A
* Compiler : CCS C 3.249
* Description : Hien thi LCD
*=============================================================================*/
#include <16F877A.h>
#include <DEFS_16F877A.h>
#fuses XT,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4000000)
#define E RD2
#define RS RD0
#define RW RD1
#byte lcd_data = 0x06 // Dia chi PORTB
/* Khai bao nguyen mau cac ham su dung */
byte lcd_read_byte();
void lcd_send_byte( byte address, byte n );
void lcd_init();
void lcd_gotoxy( byte x, byte y);
void lcd_putc( char c);
void lcd_refresh();
/* Doc mot byte tu LCD */
byte lcd_read_byte()
{
byte read_byte;
set_tris_B(0xFF); // PORTB = input
RW = 1;
delay_cycles(1);
E = 1;
delay_cycles(1);
read_byte = lcd_data;
E = 0;
set_tris_B(0x00); // PORTB = output
return(read_byte);
}
/* Goi 1byte den LCD */
void lcd_send_byte( byte address, byte n )
{
RS = 0;
while ( bit_test(lcd_read_byte(),7) ) ;
RS = address;
delay_cycles(1);
RW = 0;
delay_cycles(1);
E = 0;
lcd_data = n;
delay_cycles(1);
E = 1;
delay_us(2);
E = 0;
}
/* Khoi tao ban dau cho LCD */
void lcd_init()
{
byte const lcd_init_string[4] = {0x38, 0x0C, 1 , 6};
byte i;
set_tris_B(0x00);
RS = 0;
RW = 0;
E = 0;
delay_ms(15);
for(i=1;i<=3;++i)
{
lcd_data = 3;
delay_cycles(1);
E = 1;
delay_us(2);
E = 0;
delay_ms(5);
}
lcd_data = 2;
delay_cycles(1);
E = 1;
delay_us(2);
E = 0;
delay_ms(5);
for(i=0;i<=3;++i)
{
lcd_send_byte(0,lcd_init_string[i]);
}
}
/* Nhay den vi tri (x,y) tren LCD,nhay nham y se bao loi */
void lcd_gotoxy( byte x, byte y)
{
byte address;
switch(y)
{
case 1: address=0;
address+=x-1;
lcd_send_byte(0,0x80|address);
break;
case 2: address=0x40;
address+=x-1;
lcd_send_byte(0,0x80|address);
break;
default :lcd_init();
lcd_putc("ERROR Y POSITION");
while(true); // Dung tai day!
}
}
/* Hien thi ki tu hoac chuoi ra LCD */
void lcd_putc( char c)
{
lcd_send_byte(1,c);
}
/* Hien thi ki tu hoac chuoi ra LCD */
void lcd_refresh()
{
lcd_send_byte(0,1);
lcd_send_byte(0,6);
}
/* Ham main */
void main (void)
{
set_tris_B(0); //PORTB = output
set_tris_D(0); //PORTD = output
lcd_init();
lcd_gotoxy(5,1);
lcd_putc("WONDERFUL");
lcd_gotoxy(4,2);
lcd_putc("PICVIETNAM!");
}
namqn
Comment