lcd.c

彩晶CM12864-12单色液晶模块128x64点阵的51芯片驱动程序和配置.

/***************************************************************
Copyright(c) Vitro Light All Rights Reserved.
Author:   Tenghan
Filename: LCD.c

Description:
This file define the main function of a 12864 LCD.

*****************************************************************
$File: //LCD.c $
$Revision: #1 $
$Date: 2007/09/15 $
****************************************************************/

#include <reg51.h>
#include "type_51.h"
#include "delay.h"
#include "LCD.h"

// Define
sbit   CS = P2^0 ;
sbit   SID = P2^1 ;              //Serial data 
sbit   SCLK = P2^2 ;            //Serial clock
sbit   PSB = P2^3 ;              // Set PSB 0 is serial control

/*=============================================================================
Function Name: LCDInitial
Description: Initial LCD.
Input:    None
Return:  None 
Note:
=============================================================================*/
void LCDInitial(void)	
{
    delaynms(10); // Wait to power on, LCM
    PSB=0;    	       //Serial control mode
    CS=1;              // Chip enable in serial mode

    WriteCommand(BITBUS8 | BASICSET);  // 0011  8 bit interface, 0000 basic instruction
    WriteCommand(DISPLAYON);       // 1100 display on, cursor off, blink off
    WriteCommand(RESETAC);  // Clear screen, set DDRAM AC to 0
}

/*=============================================================================
Function Name: WriteCommand
Description: write command.
Input:    command
Return:  None 
Note: Send the sync control firs, then send the highest 4 bits, lowest 4 bits 
=============================================================================*/
void WriteCommand(UINT8 Command)
{
    UINT8 HCom,LCom;
   
    HCom=Command & 0xf0;		//get the high 4 bits
    LCom=(Command<<4) & 0xf0;    // Low 4 bits
    sendbyte(SERIALWCOM);	       //Write command sync control   
    delaynms(2);                                //Delay here is must
    sendbyte(HCom);	                      //send the highest 4 bits
    delaynms(1);                      
    sendbyte(LCom);		         
    delaynms(1);                      
}

/*=============================================================================
Function Name: WriteData
Description: write Data.
Input:    Data
Return:  None 
Note:
=============================================================================*/
void WriteData(UINT8 Data)
{
    UINT8 Hdata,Ldata;
    
    Hdata=Data&0xf0;		   
    Ldata=(Data<<4)&0xf0;     
    sendbyte(SERIALWDATA);	          //Write Data
    delaynms(1);                                  //Delay here is must
    sendbyte(Hdata);	          
    //delaynms(1);                 
    sendbyte(Ldata);		  
    //delaynms(1);                 
}

/*=============================================================================
Function Name: sendbyte
Description: send byte.
Input:    byte to be sent
Return:  None 
Note:  send bit one by one
=============================================================================*/
void sendbyte(UINT8 bbyte) 
{
   UINT8 i;
   for(i=0;i<8;i++)
   {
       SID=bbyte & 0x80;    //Get the highest bit
       SCLK=1;
       SCLK=0;
       bbyte<<=1;              //Shift left
   }  
}

/*=============================================================================
Function Name: LCDBlack
Description: lcd test, screen set to black at graph mode.
Input:    None
Return:  None 
Note:
=============================================================================*/
void LCDBlack(void)	
{ 
    UINT8 i,j;
    for(i=0;i<32;i++)
    { 
        WriteCommand(0x80 + i);   //Set Vertical point
        WriteCommand(0x80);     // Set Horizon point, horizon will automatic increase 1 after write it. 
        for(j=0;j<16;j++) 
            WriteData(0xff); 
    }
    
    for(i=0;i<32;i++)
    { 
        WriteCommand(0x80 + i); 
        WriteCommand(0x88); 
        for(j=0;j<16;j++) 
            WriteData(0xff); 			
    }
}

/*=============================================================================
Function Name: LCDClear
Description: LCD Clear, clear screen at graph mode.
Input:    None
Return:  None 
Note:
=============================================================================*/
void LCDClear(void)  
{ 
    UINT8 i,j;
    for(i=0;i<32;i++)
    { 
        WriteCommand(0x80 + i);   //Set Vertical point
        WriteCommand(0x80);        // Set Horizon point, horizon will automatic increase 1 after write it. 
        for(j=0;j<16;j++) 
            WriteData(0x00);
    }
    
    for(i=0;i<32;i++)
    { 
        WriteCommand(0x80+i); 
        WriteCommand(0x88); 
        for(j=0;j<16;j++) 
            WriteData(0x00);
    }
}


/*=============================================================================
Function Name: Disp_Img
Description: Display Image.
Input:    None
Return:  None 
Note:
=============================================================================*/
void Disp_Img(UINT8 *Img) 
{ 
    UINT8 i, j;
    UINT16 k =0 ;
    for(i=0;i<32;i++)
    { 
         WriteCommand(0x80+i);
         WriteCommand(0x80);
         for(j=0;j<16;j++) 
         {
             WriteData(Img[k++]);
          }
    }
   
    for(i=0;i<32;i++)
    { 
         WriteCommand(0x80+i);
         WriteCommand(0x88);
         for(j=0;j<16;j++) 
        {
            WriteData(Img[k++]);
        }
    }
}