nhanthienthan
14-08-2009, 11:46 PM
Chương trình viết chữ XIN CHAO đơn giản như thế này
#include <16f877A.h>
#fuses HS, NOLVP, NOWDT, NOPROTECT
#use delay (clock=4000000) //Use built-in function: delay_ms() & delay_us()
#include "LCD_LIB_4BIT.c"
VOID MAIN()
{
LCD_INIT();
LCD_PUTCHAR('X');
DELAY_MS(1000);
LCD_PUTCHAR('I');
DELAY_MS(1000);
LCD_PUTCHAR('N');
DELAY_MS(1000);
LCD_PUTCHAR(' ');
DELAY_MS(1000);
LCD_PUTCHAR('C');
DELAY_MS(1000);
LCD_PUTCHAR('H');
DELAY_MS(1000);
LCD_PUTCHAR('A');
DELAY_MS(1000);
LCD_PUTCHAR('O');
}
Còn đây là file LCD_LIB_4BIT.c
#include <stddef.h>
#define LCD_RS PIN_B2
#define LCD_EN PIN_B3
#define LCD_D4 PIN_B4
#define LCD_D5 PIN_B5
#define LCD_D6 PIN_B6
#define LCD_D7 PIN_B7
#define Line_1 0x80
#define Line_2 0xC0
#define Clear_Scr 0x01
#separate void LCD_Init ();// ham khoi tao LCD
#separate void LCD_SetPosition ( unsigned int cX );//Thiet lap vi tri con tro
#separate void LCD_PutChar ( unsigned int cX );// Ham viet1kitu/1chuoi len LCD
#separate void LCD_PutCmd ( unsigned int cX) ;// Ham gui lenh len LCD
#separate void LCD_PulseEnable ( void );// Xung kich hoat
#separate void LCD_SetData ( unsigned int cX );// Dat du lieu len chan Data
//khoi tao LCD**********************************************
#separate void LCD_Init ()
{
LCD_SetData ( 0x00 );
delay_ms(20); /*Cho cho lcd khoi tao */
output_low ( LCD_RS );// che do gui lenh
LCD_SetData ( 0x03 ); /* khoi tao che do 4 bit */
LCD_PulseEnable();
LCD_PulseEnable();
LCD_PulseEnable();
LCD_SetData ( 0x02 ); /* tao giao dien 4 bit */
LCD_PulseEnable(); /* send dual nibbles hereafter, MSN first */
LCD_PutCmd ( 0x2C ); /* function set (all lines, 5x7 characters) */
LCD_PutCmd ( 0x0C ); /* display ON, cursor off, no blink */
LCD_PutCmd ( 0x06 ); /* entry mode set, increment & scroll left */
LCD_PutCmd ( 0x01 ); /* clear display */
// Init for BarGraph
}
#separate void LCD_SetPosition ( unsigned int cX )
{
/* this subroutine works specifically for 4-bit Port A */
LCD_SetData ( swap ( cX ) | 0x08 );
LCD_PulseEnable();
LCD_SetData ( swap ( cX ) );
LCD_PulseEnable();
}
#separate void LCD_PutChar ( unsigned int cX )
{
/* this subroutine works specifically for 4-bit Port A */
output_high ( LCD_RS );
LCD_PutCmd( cX );
output_low ( LCD_RS );
}
#separate void LCD_PutCmd ( unsigned int cX )
{
LCD_SetData ( swap ( cX ) ); /* send high nibble */
LCD_PulseEnable();
LCD_SetData ( swap ( cX ) ); /* send low nibble */
LCD_PulseEnable();
}
#separate void LCD_PulseEnable ( void )
{
output_high ( LCD_EN );
delay_us ( 3 ); // was 10
output_low ( LCD_EN );
delay_ms ( 3 ); // was 5
}
#separate void LCD_SetData ( unsigned int CX )
{
output_bit ( LCD_D4, CX & 0x01 );
output_bit ( LCD_D5, CX & 0x02 );
output_bit ( LCD_D6, CX & 0x04 );
output_bit ( LCD_D7, CX & 0x08 );
}
Viết trong CCS nhưng khi em nhấn f9 thì nó hiện lỗi này là sao ạ
***Eroor 128"LCD_LIB_4BIT.c"Line12(2,10): A#DEVICE require before this line
Mong các bro giúp đỡ, em mới học Pic nên chưa thành thạo lăm
#include <16f877A.h>
#fuses HS, NOLVP, NOWDT, NOPROTECT
#use delay (clock=4000000) //Use built-in function: delay_ms() & delay_us()
#include "LCD_LIB_4BIT.c"
VOID MAIN()
{
LCD_INIT();
LCD_PUTCHAR('X');
DELAY_MS(1000);
LCD_PUTCHAR('I');
DELAY_MS(1000);
LCD_PUTCHAR('N');
DELAY_MS(1000);
LCD_PUTCHAR(' ');
DELAY_MS(1000);
LCD_PUTCHAR('C');
DELAY_MS(1000);
LCD_PUTCHAR('H');
DELAY_MS(1000);
LCD_PUTCHAR('A');
DELAY_MS(1000);
LCD_PUTCHAR('O');
}
Còn đây là file LCD_LIB_4BIT.c
#include <stddef.h>
#define LCD_RS PIN_B2
#define LCD_EN PIN_B3
#define LCD_D4 PIN_B4
#define LCD_D5 PIN_B5
#define LCD_D6 PIN_B6
#define LCD_D7 PIN_B7
#define Line_1 0x80
#define Line_2 0xC0
#define Clear_Scr 0x01
#separate void LCD_Init ();// ham khoi tao LCD
#separate void LCD_SetPosition ( unsigned int cX );//Thiet lap vi tri con tro
#separate void LCD_PutChar ( unsigned int cX );// Ham viet1kitu/1chuoi len LCD
#separate void LCD_PutCmd ( unsigned int cX) ;// Ham gui lenh len LCD
#separate void LCD_PulseEnable ( void );// Xung kich hoat
#separate void LCD_SetData ( unsigned int cX );// Dat du lieu len chan Data
//khoi tao LCD**********************************************
#separate void LCD_Init ()
{
LCD_SetData ( 0x00 );
delay_ms(20); /*Cho cho lcd khoi tao */
output_low ( LCD_RS );// che do gui lenh
LCD_SetData ( 0x03 ); /* khoi tao che do 4 bit */
LCD_PulseEnable();
LCD_PulseEnable();
LCD_PulseEnable();
LCD_SetData ( 0x02 ); /* tao giao dien 4 bit */
LCD_PulseEnable(); /* send dual nibbles hereafter, MSN first */
LCD_PutCmd ( 0x2C ); /* function set (all lines, 5x7 characters) */
LCD_PutCmd ( 0x0C ); /* display ON, cursor off, no blink */
LCD_PutCmd ( 0x06 ); /* entry mode set, increment & scroll left */
LCD_PutCmd ( 0x01 ); /* clear display */
// Init for BarGraph
}
#separate void LCD_SetPosition ( unsigned int cX )
{
/* this subroutine works specifically for 4-bit Port A */
LCD_SetData ( swap ( cX ) | 0x08 );
LCD_PulseEnable();
LCD_SetData ( swap ( cX ) );
LCD_PulseEnable();
}
#separate void LCD_PutChar ( unsigned int cX )
{
/* this subroutine works specifically for 4-bit Port A */
output_high ( LCD_RS );
LCD_PutCmd( cX );
output_low ( LCD_RS );
}
#separate void LCD_PutCmd ( unsigned int cX )
{
LCD_SetData ( swap ( cX ) ); /* send high nibble */
LCD_PulseEnable();
LCD_SetData ( swap ( cX ) ); /* send low nibble */
LCD_PulseEnable();
}
#separate void LCD_PulseEnable ( void )
{
output_high ( LCD_EN );
delay_us ( 3 ); // was 10
output_low ( LCD_EN );
delay_ms ( 3 ); // was 5
}
#separate void LCD_SetData ( unsigned int CX )
{
output_bit ( LCD_D4, CX & 0x01 );
output_bit ( LCD_D5, CX & 0x02 );
output_bit ( LCD_D6, CX & 0x04 );
output_bit ( LCD_D7, CX & 0x08 );
}
Viết trong CCS nhưng khi em nhấn f9 thì nó hiện lỗi này là sao ạ
***Eroor 128"LCD_LIB_4BIT.c"Line12(2,10): A#DEVICE require before this line
Mong các bro giúp đỡ, em mới học Pic nên chưa thành thạo lăm