因為用來控制 LCD E 腳的 RA2 在 Power-On 時的預設模式是 AD Input . 所以要將 ADCON1 做適當的設定 , 讓 RA2 變成
Digital I/O. 當然, 要將 RA2 設成　Output 喔　!

我想只是因為 RA2 的關係吧 !

祝您順利成功　

建議你先用範例程式裡的驅動試試看~~~

大家好, 由於 APP001 REV.2 的 LCD module 為:
LCD E => PORTAbits.RA2
LCD R/W => PORTDbits.RD5
LCD RS => PORTDbits.RD4
LCD DATA => RD4 .. RD7 as LCD Data
可是我在 dubug OK 之後, 卻不會顯示想要之結果!
可否告訴我, 是哪裡的問題阿? 謝謝~~

*************************************

#include <p18f452.h>
#include <delays.h>
#include "p18LCD.h"
#define LCD_DATA PORTD
#define LCD_CMD PORTD

void InitializePORT(void);
void OpenLCD (void) ;

unsigned char TAB2[]="yang";

void main (void)
{
InitializePORT();
OpenLCD();
LCD_Set_Cursor(0,0);
putcLCD(TAB2);
}

void InitializePORT(void)
{
TRISD=0;
PORTD=0x00;
}

*************************************
void OpenLCD(void)

{
LCD_CTRL = LCD_CTRL & 0b11001111 ;
// Set LCD E,R/W,RS to Low
LCD_DATA = LCD_DATA & 0b11110000 ;
// LCD DB[4:7] to Low
DIR_LCD_CTRL &= 0b11001111 ;
// E,R/,RS are Output pin
DIR_LCD_DATA &= 0b11110000 ;
// LCD DB[4:7} are output

LCD_DATA = 0b00000011 ;
LCD_CMD_W_Timing() ;
LCD_L_Delay() ;

LCD_DATA = 0b00000011 ;
LCD_CMD_W_Timing() ;
LCD_L_Delay() ;

LCD_DATA = 0b00000011 ;
LCD_CMD_W_Timing() ;
LCD_L_Delay() ;

LCD_DATA = 0b00000010 ;
LCD_CMD_W_Timing() ;
LCD_L_Delay() ;

WriteCmdLCD(DISP_2Line_4Bit) ;
LCD_S_Delay() ;

WriteCmdLCD(DISP_ON) ;
LCD_S_Delay() ;

WriteCmdLCD(ENTRY_INC) ;
LCD_S_Delay() ;

WriteCmdLCD(CLR_DISP) ;
LCD_L_Delay() ;
}

void LCD_Set_Cursor(unsigned char CurY, unsigned char CurX)
{
WriteCmdLCD( 0x80 + CurY * 0x40 + CurX) ;
LCD_S_Delay() ;
}

void WriteCmdLCD( unsigned char LCD_CMD)
{
Temp_CMD = (LCD_CMD & 0xF0)>>4 ;
// Send high nibble to LCD bus
LCD_DATA= (LCD_DATA & 0xF0)|Temp_CMD ;
LCD_CMD_W_Timing () ;

Temp_CMD = LCD_CMD & 0x0F ;
// Send low nibble to LCD bus
LCD_DATA= (LCD_DATA & 0xF0)|Temp_CMD ;
LCD_CMD_W_Timing () ;
LCD_S_Delay() ;
// Delay 100uS for execution
}

void WriteDataLCD( unsigned char LCD_CMD)
{

Temp_CMD = (LCD_CMD & 0xF0)>>4 ;
// Send high nibble to LCD bus
LCD_DATA= (LCD_DATA & 0xF0)|Temp_CMD ;
LCD_DAT_W_Timing () ;

Temp_CMD = LCD_CMD & 0x0F ;
// Send low nibble to LCD bus
LCD_DATA= (LCD_DATA & 0xF0)|Temp_CMD ;
LCD_DAT_W_Timing () ;

LCD_S_Delay() ;
// Delay 100uS for execution
}

void putcLCD(unsigned char LCD_Char)
{
WriteDataLCD(LCD_Char) ;

}

void LCD_L_Delay(void)
{
Delay10KTCYx(CPU_SPEED / 2) ;
}