em vẫn chưa biết làm thế nào để xuất là 1 biến (không phải kiểu string)
trước em có dùng trình dịch HTPIC cho 16f887 nó có 2 file thư viện LCD như này(cái này là em sưu tầm trên mạng)
lcd.h:
Code:
#ifndef _LCD_H_
#define _LCD_H_
#include <htc.h>
#ifndef _XTAL_FREQ
#define _XTAL_FREQ 4000000
#endif
/* Display ON/OFF Control defines */
#define DON 0b00001111 /* Display on */
#define DOFF 0b00001011 /* Display off */
#define CURSOR_ON 0b00001111 /* Cursor on */
#define CURSOR_OFF 0b00001101 /* Cursor off */
#define BLINK_ON 0b00001111 /* Cursor Blink */
#define BLINK_OFF 0b00001110 /* Cursor No Blink */
/* Cursor or Display Shift defines */
#define SHIFT_CUR_LEFT 0b00000100 /* Cursor shifts to the left */
#define SHIFT_CUR_RIGHT 0b00000101 /* Cursor shifts to the right */
#define SHIFT_DISP_LEFT 0b00000110 /* Display shifts to the left */
#define SHIFT_DISP_RIGHT 0b00000111 /* Display shifts to the right */
/* Function Set defines */
#define FOUR_BIT 0b00101100 /* 4-bit Interface */
#define EIGHT_BIT 0b00111100 /* 8-bit Interface */
#define LINE_5X7 0b00110000 /* 5x7 characters, single line */
#define LINE_5X10 0b00110100 /* 5x10 characters */
#define LINES_5X7 0b00111000 /* 5x7 characters, multiple line */
/* Pins mapping */
#ifndef LCD_RS
#define LCD_RS RD1
#define LCD_EN RD3
#define LCD_RW RD2
#define LCD_DATA4 RD4
#define LCD_DATA5 RD5
#define LCD_DATA6 RD6
#define LCD_DATA7 RD7
#define LCD_RS_TRIS TRISD1
#define LCD_EN_TRIS TRISD3
#define LCD_RW_TRIS TRISD2
#define LCD_DATA4_TRIS TRISD4
#define LCD_DATA5_TRIS TRISD5
#define LCD_DATA6_TRIS TRISD6
#define LCD_DATA7_TRIS TRISD7
#endif
//typedef unsigned char unsigned char; // 8-bit unsigned
typedef union _BYTE_VAL
{
unsigned char Val;
struct
{
unsigned char b0:1;
unsigned char b1:1;
unsigned char b2:1;
unsigned char b3:1;
unsigned char b4:1;
unsigned char b5:1;
unsigned char b6:1;
unsigned char b7:1;
} bits;
} BYTE_VAL;
void lcd_init();
unsigned char lcd_busy();
unsigned char lcd_get_byte(unsigned char rs);
void lcd_put_byte(unsigned char a,unsigned char b);
void lcd_gotoxy(unsigned char col, unsigned char row);
void lcd_putc(char c);
void lcd_puts(const char* s);
#endif
lcd.c
Code:
#include <stdlib.h>
#include <ctype.h>
#include "lcd.h"
void lcd_init(){
unsigned char i;
LCD_EN_TRIS = 0;
LCD_RS_TRIS = 0;
LCD_RW_TRIS = 0;
LCD_DATA4_TRIS = 0;
LCD_DATA5_TRIS = 0;
LCD_DATA6_TRIS = 0;
LCD_DATA7_TRIS = 0;
LCD_EN = 0;
LCD_RS = 0;
LCD_RW = 0;
__delay_ms(100); // delay for power on
// reset LCD
lcd_put_byte(0,0x30);
__delay_ms(50);
lcd_put_byte(0,0x30);
__delay_ms(50);
lcd_put_byte(0,0x32);
__delay_ms(100); // delay for LCD reset
__delay_ms(100); // delay for LCD reset
__delay_ms(100); // delay for LCD reset
while(lcd_busy());
lcd_put_byte(0,FOUR_BIT & LINES_5X7); // Set LCD type
while(lcd_busy());
lcd_put_byte(0,DOFF&CURSOR_OFF&BLINK_OFF); // display off
while(lcd_busy());
lcd_put_byte(0,DON&CURSOR_OFF&BLINK_OFF); // display on
while(lcd_busy());
lcd_put_byte(0,0x01); // clear display and move cursor to home
while(lcd_busy());
lcd_put_byte(0,SHIFT_CUR_LEFT); // cursor shift mode
while(lcd_busy());
lcd_put_byte(0,0x01); // clear display and move cursor to home
while(lcd_busy());
}
unsigned char lcd_busy()
{
unsigned char busy;
LCD_DATA4_TRIS = 1;
LCD_DATA5_TRIS = 1;
LCD_DATA6_TRIS = 1;
LCD_DATA7_TRIS = 1;
LCD_RW = 1;
LCD_RS = 0;
__delay_us(20);
LCD_EN = 1;
__delay_us(20);
busy = LCD_DATA7;
LCD_EN = 0;
__delay_us(20);
LCD_EN = 1;
__delay_us(20);
LCD_EN = 0;
return busy;
}
unsigned char lcd_get_byte(unsigned char rs)
{
BYTE_VAL b;
LCD_DATA4_TRIS = 1;
LCD_DATA5_TRIS = 1;
LCD_DATA6_TRIS = 1;
LCD_DATA7_TRIS = 1;
LCD_RW = 1;
LCD_RS = 0;
if(rs) LCD_RS = 1;
__delay_us(20);
LCD_EN = 1;
__delay_us(20);
b.bits.b7 = LCD_DATA7;
b.bits.b6 = LCD_DATA6;
b.bits.b5 = LCD_DATA5;
b.bits.b4 = LCD_DATA4;
LCD_EN = 0;
__delay_us(20);
LCD_EN = 1;
__delay_us(20);
b.bits.b3 = LCD_DATA7;
b.bits.b2 = LCD_DATA6;
b.bits.b1 = LCD_DATA5;
b.bits.b0 = LCD_DATA4;
LCD_EN = 0;
return b.Val;
}
void lcd_put_byte(unsigned char rs, unsigned char b)
{
BYTE_VAL temp;
LCD_DATA4_TRIS = 0;
LCD_DATA5_TRIS = 0;
LCD_DATA6_TRIS = 0;
LCD_DATA7_TRIS = 0;
LCD_RS = 0;
if(rs) LCD_RS = 1;
__delay_us(20);
LCD_RW = 0;
__delay_us(20);
LCD_EN = 0;
temp.Val = b;
// send the high nibble
LCD_DATA4 = temp.bits.b4;
LCD_DATA5 = temp.bits.b5;
LCD_DATA6 = temp.bits.b6;
LCD_DATA7 = temp.bits.b7;
__delay_us(20);
LCD_EN = 1;
__delay_us(20);
LCD_EN = 0;
// send the low nibble
LCD_DATA4 = temp.bits.b0;
LCD_DATA5 = temp.bits.b1;
LCD_DATA6 = temp.bits.b2;
LCD_DATA7 = temp.bits.b3;
__delay_us(20);
LCD_EN = 1;
__delay_us(20);
LCD_EN = 0;
}
void lcd_putc(char c){
switch(c){
case '\f':
lcd_put_byte(0, 1);
while(lcd_busy());
break;
case '\n':
lcd_gotoxy(0, 1);
break;
default:
if(isprint(c)){
lcd_put_byte(1, c);
while(lcd_busy());
}
break;
}
}
void lcd_gotoxy(unsigned char col, unsigned char row)
{
unsigned char address;
if(row!=0)
address=0x40;
else
address=0;
address += col;
lcd_put_byte(0,0x80|address);
while(lcd_busy());
}
void lcd_puts(const char* s)
{
while(*s){
lcd_putc(*s++);
}
}
với 2 file này em có thể dùng LCD khá dễ dang với lệnh printf ,như trong C chuẩn.
Anh R có thể chỉ cho em cách sửa 2 file này để dùng cho pic 18 dc ko ??
hoặc làm sao để dùng dc với thư viện Lcd của anh!!
thanks anh!!