xlcd.p18.ex.txt

来自「Microchip PIC18F 设备驱动 LCD部分」· 文本 代码 · 共 200 行

/*###############################################################################
;# TITLE   "LCD Display"	
;# 				
;#      Program         :External LCD
;#      Version         :1.0	
;#      Revision Date   :6/9/03   	
;#      Author          :Naveen Raj
;#									
;# Program demonstrates use of External LCD Module
;# general purpose library module.*/
/*###############################################################################*/


#include "xlcd.h"
#define XLCDCursorOnBlinkOn()        XLCDCommand(0x0F)	//the user may refer the LCD data sheet
#define XLCDCursorOnBlinkOff()       XLCDCommand(0x0E)	//and generate commands like this
#define XLCDDisplayOnCursorOff()     XLCDCommand(0x0C)
#define XLCDDisplayOff()             XLCDCommand(0x08)
#define XLCDCursorMoveLeft()         XLCDCommand(0x10)
#define XLCDCursorMoveRight()        XLCDCommand(0x14)
#define XLCDDisplayMoveLeft()        XLCDCommand(0x18)
#define XLCDDisplayMoveRight()       XLCDCommand(0x1C)
rom const char aaa[]="Hello";
ram const char bbb[]="Microchip";

/*The user  is require to write this 15 milli second delay in his routine,this delay */
/*is required as it is used in XLCDInit() which is used to initialize the LCD module*/

void XLCDDelay15ms (void)
{
    int i;
    for(i=0;i<10000;i++)
    {
    Nop();
    }
    return;
}

/*The user  is require to write this 4 milli second delay in his routine,this  delay */
/*is required as it is used in XLCDInit() which is used to initialize the LCD module*/

void XLCDDelay4ms (void)
{
    int i;
    for(i=0;i<2500;i++)
    {
    Nop();
    }
    return;
}
/*The user  is require to write this 500 nano second in his routine  this  delay */
/*is required as it is used in all read and write commaands in the XLCD routines*/

void XLCD_Delay500ns(void)
{
    Nop();
    Nop();
    Nop();
}
/*The user  is require to write this XLCDDelay() in his routine,this is required to write if */
/*the mode selected is by delay , it is used in all XLCD read and write commands of this routine */
void XLCDDelay(void)
    {
    int i;
    for(i=0;i<1000;i++)
        {
        Nop();
        }
    return;
    }

void main (void)
{
ADCON1=0x07;                            //make PORTA digital as control portpins are from PORTA

XLCDInit();                             //initialize the LCD module

// example to display strings           
/*XLCDPutRomString(aaa);
//XLCDPutRamString(bbb);
while(1);*/


#ifdef  XLCD_BLOCK

#ifdef XLCD_8BIT
XLCDPut('8');
XLCDPut('B');
XLCDPut('i');
XLCDPut('t');
#endif
#ifdef XLCD_4BIT
XLCDPut('4');
XLCDPut('B');
XLCDPut('i');
XLCDPut('t');
    #ifdef  XLCD_UPPER
    XLCDPut('U');
    XLCDPut('p');
    XLCDPut('p');
    XLCDPut('e');
    XLCDPut('r');
    #endif
    #ifdef  XLCD_LOWER
    XLCDPut('L');
    XLCDPut('o');
    XLCDPut('w');
    XLCDPut('e');
    XLCDPut('r');
    #endif
#endif 

XLCDL2home();

#ifdef  XLCD_DELAYMODE
    XLCDPut('D');
    XLCDPut('e');
    XLCDPut('l');
    XLCDPut('a');
    XLCDPut('y');
#endif 
#ifdef  XLCD_READBFMODE
    XLCDPut('B');
    XLCDPut('F');
    XLCDPut('R');
    XLCDPut('e');
    XLCDPut('a');
    XLCDPut('d');
#endif 
   
#endif  //for XLCD_BLOCK


//example for non blocking mode


#ifdef  XLCD_NONBLOCK

    #ifdef  XLCD_8BIT
    while(XLCDIsBusy());
    XLCDPut('8');   
    #endif
    
    #ifdef  XLCD_4BIT
    #ifdef  XLCD_UPPER
        while(XLCDIsBusy());
        XLCDPut('4');
        while(XLCDIsBusy());
        XLCDPut('U');
    #endif
    
    
    #ifdef  XLCD_LOWER 
         while(XLCDIsBusy());
        XLCDPut('4');      
        while(XLCDIsBusy());
        XLCDPut('L');    
    #endif       
    #endif
    
    
        while(XLCDIsBusy());
        XLCDCommand(0xc0);
        while(XLCDIsBusy());
        XLCDPut('N');
        while(XLCDIsBusy());
        XLCDPut('O');
        while(XLCDIsBusy());
        XLCDPut('N');
        while(XLCDIsBusy());
        XLCDPut('B');
        while(XLCDIsBusy());
        XLCDPut('L');
        while(XLCDIsBusy());
        XLCDPut('o');
        while(XLCDIsBusy());
        XLCDPut('c');
        while(XLCDIsBusy());
        XLCDPut('k');

#endif  //XLCD_NONBLOCK
//while(XLCDIsBusy());
//XLCDCommand(0x82);
//while(XLCDIsBusy());
//XLCDGet();
//while(XLCDIsBusy());
//XLCDGetAddr();

//XLCDCursorOnBlinkOff();   	
 XLCDDisplayOnCursorOff(); 			 	
 //XLCDCursorMoveLeft();     	
 //XLCDCursorMoveRight();    	
 //XLCDDisplayMoveLeft();     	
 //XLCDDisplayMoveRight() ;


while(1);
return ;
}