drive_functions.h

LCD12864上显示波形.rar

#define uchar unsigned char
#define uint unsigned int
#define RST P20
#define E 	P21
#define RW 	P22
#define DI 	P23
#define CS2 P24
#define CS1 P25

uchar chip_select=1;
uchar color=0x00;

bit black_flag=0;  //黑屏显示标志位

sbit P20=P2^0;
sbit P21=P2^1;
sbit P22=P2^2;
sbit P23=P2^3;
sbit P24=P2^4;
sbit P25=P2^5;

bit busy_bit=1;
bit menu=0;
uchar line=0;
uchar select=0;

#define LCD P1

/*************************** check busy ************************/

bit CheckBusy(void)
{
	uchar state=0;

	LCD=0xFF;
	RW=1;
	DI=0;
	E=1;
	E=0;
	E=1;        //E的下降沿，然后E持续拉高读才有效
	state=LCD;
	E=0;
	busy_bit=(bit)(state>>7);
	
	return(busy_bit);
	}


/******************* display on **********************/
/*
void DspOn(void)
{
   	while(CheckBusy());
	CS1=1;
	CS2=0;
	LCD=0xFF;
	RW=0;
   	DI=0;
   	LCD=0x3F;
	E=1;
	E=0;

	while(CheckBusy());
	CS1=0;
	CS2=1;
	LCD=0xFF;
	RW=0;
   	DI=0;
   	LCD=0x3F;
	E=1;
	E=0;
    }
*/
/********************* display off ***********************/
/*
void DspOff(void)
{
	while(CheckBusy());
	CS1=1;
	CS2=0;
	LCD=0xFF;
	RW=0;
	DI=0;
	LCD=0x3E;
	E=1;
	E=0;

	while(CheckBusy());
	CS1=0;
	CS2=1;
	LCD=0xFF;
	RW=0;
	DI=0;
	LCD=0x3E;
	E=1;
	E=0;
	}
*/
/******************** set display start line **************/
/*
void SetStartLine(uchar line)
{
	CS1=1;
	CS2=0;
	while(CheckBusy());
	LCD=0xFF;
	RW=0;
	DI=0;
	LCD=line+0xC0;
	E=1;
	E=0;

	CS1=0;
	CS2=1;
	while(CheckBusy());
	LCD=0xFF;
	RW=0;
	DI=0;
	LCD=line+0xC0;
	E=1;
	E=0;
	}
*/
/************************* set display page ****************/ 

void SetPage(uchar page)
{	
	CS1=1;
	CS2=0;
	while(CheckBusy());
	LCD=0xFF;
	RW=0;
	DI=0;
	LCD=page+0xB8;
	E=1;
	E=0;

	CS1=0;
	CS2=1;
	while(CheckBusy());
	LCD=0xFF;
	RW=0;
	DI=0;
	LCD=page+0xB8;
	E=1;
	E=0;
	}

/************************ set display column *****************/

void SetColumn(uchar column)
{
	CS1=1;
	CS2=0;
	while(CheckBusy());
	LCD=0xFF;
	RW=0;
	DI=0;
	LCD=column+0x40;
	E=1;
	E=0;

	CS1=0;
	CS2=1;
	while(CheckBusy());
	LCD=0xFF;
	RW=0;
	DI=0;
	LCD=column+0x40;
	E=1;
	E=0;
	}


/***************************** write data ************************/

void WriteData(uchar dsp_data)
{
	while(CheckBusy());
	LCD=0xFF;
	if(chip_select==1)
	{
		CS1=1;
		CS2=0;
		}
	 else{
			CS1=0;
			CS2=1;
			}
	RW=0;
	DI=1;
	
	LCD=dsp_data;
	E=1;
	E=0;
	}

/**************************** read data ***********************/

uchar ReadData(void)
{
	uchar dsp_data;
	while(CheckBusy());
	LCD=0xFF;
	if(chip_select==1)
	{
		CS2=0;
		CS1=1;
		}
	 else{
	 		CS2=1;
			CS1=0;
			}
	RW=1;
	DI=1;
	E=1;
	E=0;
	E=1;        //E的下降沿，然后E持续拉高读才有效

	dsp_data=LCD;

	E=0;
	return(dsp_data);
	}

/******************** clear LCD *******************************/

void ClearLCD(void)
{
	uchar page,column;
if(black_flag==1)color=0xFF;   //设置清屏颜色
else color=0x00;
	for(page=0;page<8;page++)
	{
	  SetPage(page);
	  SetColumn(0);
	  for(column=0;column<64;column++)
	  {	 
		chip_select=1;   
		WriteData(color);               //clear chip1
		chip_select=2;                  
		WriteData(color);               //clear chip2
		}
	   }
	  }

/***********************display up area of character *****************/
/*
void DspUp(uchar code * character)
{
	uchar i;
	for(i=0;i<16;i++)
	{
	  WriteData(* (character+i));
	  }
	}
*/
/*********************** display down area of character ***************/
/*
void DspDown(uchar code * character)
{
	uchar i;
	for(i=16;i<32;i++)
	{
	  WriteData(* (character+i));
	  }
	}
*/