lcd1602.h

dds集成芯片ad9851的控制程序

/********************************************************************
1602头文件
功能：提供    Delay1ms	LCD_Initial() GotoXY(0~16,0/1) Print("") 函数
********************************************************************/


#ifndef LCD_CHAR_1602_2005_4_9
#define LCD_CHAR_1602_2005_4_9

#include <intrins.h>

//Port Definitions**********************************************************
unsigned char xdata *ram_addr;//定义外部数据地址

void Delay1ms(unsigned int count)
{
	unsigned int i,j;
	for(i=0;i<count;i++)
	for(j=0;j<120;j++);
}

//内部等待函数**************************************************************************
#define LCD_CR XBYTE[0xfeeb]
void LCD_Wait(void)
{
	 unsigned char t;
	 Delay1ms(1);
     while(t& 0x80)
	 t=LCD_CR;;
}

//向LCD写入命令或数据************************************************************
#define LCD_COMMAND			0xfceb     // Command
#define LCD_DATA			0xfdeb      // Data
#define LCD_CLEAR_SCREEN	0x01      // 清屏
#define LCD_HOMING  		0x02      // 光标返回原点

void LCD_Write(unsigned int addr, unsigned char input)
{
	ram_addr=addr ;
	*ram_addr=input;
    LCD_Wait();	
}


//设置显示模式************************************************************
#define LCD_SHOW			0x04    //显示开
#define LCD_HIDE			0x00    //显示关	  

#define LCD_CURSOR			0x02 	//显示光标
#define LCD_NO_CURSOR		0x00    //无光标		     

#define LCD_FLASH			0x01    //光标闪动
#define LCD_NO_FLASH		0x00    //光标不闪动

void LCD_SetDisplay(unsigned char DisplayMode)
{
	LCD_Write(LCD_COMMAND, 0x08|DisplayMode);	
}

//设置输入模式************************************************************
#define LCD_AC_UP			0x02
#define LCD_AC_DOWN			0x00      // default

#define LCD_MOVE			0x01      // 画面可平移
#define LCD_NO_MOVE			0x00      //default

void LCD_SetInput(unsigned char InputMode)
{
	LCD_Write(LCD_COMMAND, 0x04|InputMode);
}

//初始化LCD************************************************************
void LCD_Initial()
{
	LCD_Write(LCD_COMMAND,0x38);           //8位数据端口,2行显示,5*7点阵
	LCD_Write(LCD_COMMAND,0x38);
	LCD_SetDisplay(LCD_SHOW|LCD_NO_CURSOR);    //开启显示, 无光标
	LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN);   //清屏
	LCD_SetInput(LCD_AC_UP|LCD_NO_MOVE);       //AC递增, 画面不动
}

//************************************************************************
void GotoXY(unsigned char x, unsigned char y)
{
	if(y==0)
		LCD_Write(LCD_COMMAND,0x80|x);
	if(y==1)
		LCD_Write(LCD_COMMAND,0x80|(x-0x40));
}
void Print(unsigned char *str)
{
	while(*str!='\0')
	{
		LCD_Write(LCD_DATA,*str);
		str++;
	}
}

void Printnum(unsigned char *num,unsigned char t)
{
	while(t--)
	  {
		LCD_Write(LCD_DATA,*num);
		num++;
	   }
}

#endif