lm1602.c

ds18b20+1602液晶显示 基于atmega16l单片机的编程

#include "lm1602.h"
#include "string.h"
#include <macros.h>


/*自定义字符*/
byte  CGRAMtab[] = {0x0C,0x12,0x12,0x0C,0x00,0x00,0x00,0x00} ; //度的符号


void LcdInit(void);
void DisplayTime(byte hour,byte minute,byte second);

unsigned char CheckBusy(void)
{
    
    DDRB = 0x00;
	NOP();
	NOP();
	NOP();
	NOP();
	NOP();
	NOP();
	NOP();
	NOP();
	RS_L;
	RW_H;
	EN_H;
	NOP();
	NOP();
	NOP();
	NOP();
	 EN_L;
	if((PINB&0x80)==0x80)
	{
	   DDRB = 0xFF;
	   return 1;
	}
	else
	{
	   DDRB = 0xFF;
	   return 0;
	 }
	
}

void delay(void)
{
  unsigned int t;
  for(t=0;t<1000;t++);
}

void WriteCmd(byte cmd)
{
 
	RS_L;
	RW_L; 
	DATAPORT = cmd;	 
	EN_H; 
	 //while(CheckBusy());
	delay();
	EN_L;
	}

void WriteData(byte datas)
{
	RS_H;
	RW_L;
	DATAPORT = datas;
	EN_H; 
    delay();
	EN_L;
}

void  LCD_WriteCGRAM(byte *cgram,byte len)  //自定义字符写入CGRAM函数
{  
   byte i ;
   WriteCmd(0x40) ;  //写CGRAM
    for (i = 0 ; i< len ; i++)       
     WriteData(*(cgram+i)) ;        
}


void ClearLcd(void)
{
    WriteCmd(CLR_DIS);
}

void CurReturn(void)
{
 	 WriteCmd(CUR_RET);	
}

void SetInputMode(byte curDir, byte textMove)
{
    byte setData = 0x04;
	if (curDir == 1) //光标右移
		   setData |= 0x02;
	else
	    setData &= ~0x02;
		  
	if (textMove == 1)	//文字移动
		   setData |= 0x01;
	else                 //文字不移动
		   setData &= ~0x01;	
	WriteCmd(setData);		       	   
}

void SetDisMode(byte allDis, byte curDis, byte curFlash)
{
 	 byte setData = 0x08;
	
	if (allDis == 1)   //所有都显示 
		   setData |= 0x04;
	else		    	   //都不显示 
	    setData &= ~0x04;
		  
	if (curDis == 1)	//光标显示 
		   setData |= 0x02;
	else                 //光标不显示
		   setData &= ~0x02;	
	
	if (curFlash == 1)	//光标闪烁
		   setData |= 0x01;
	else                 ///光标不闪烁
		   setData &= ~0x01;		   
	WriteCmd(setData);		  
}
/*
void SetShift(byte cMove, byte cDir)
{
 	 byte setData = 0x10;
	
	if (cMove == 1)   //移动文字
		   setData |= 0x08;
	else		    	   //移动光标
	    setData &= ~0x08;
		  
	if (cDir == 1)	//右移
		   setData |= 0x04;
	else                 //左移
		   setData &= ~0x04;
	WriteCmd(setData);			
}
*/
void SetFunction(byte numBus, byte lineDis, byte fDis)
{
 	byte setData = 0x20;
	
	if (numBus == 1)   //4位总线 
		   setData |= 0x10;
	else		    	   //8位总线 
	    setData &= ~0x10;
		  
	if (lineDis == 1)	//双行显示 
		   setData |= 0x08;
	else                 //单行显示
		   setData &= ~0x08;	
	
	if (fDis == 1)	//5*10点阵
		   setData |= 0x04;
	else                 ///5*7点阵
		   setData &= ~0x04;		   
	WriteCmd(setData);		  
}
 /*
void SetCGRAMAddr(byte ramAddr)
{
 	byte setData = 0x40;
	setData |= (ramAddr &0x3f);
	WriteCmd(setData);		 
}
*/
void SetDisAddr(byte urow, byte ucol)
{
    if (ucol >= 20)
	ucol= 20;
	if (urow == 0)
	    WriteCmd( 0x80+ucol);	
	else
		WriteCmd( 0xc0+ucol);	
}

void DisCGRAM(byte urow, byte ucol, char ch)
{
    SetDisAddr(urow, ucol);
	WriteData(ch);
}
/*
void DisChar(byte row, byte line, char ch)
{
    SetDisAddr(row, line);
	WriteData(ch);
}
*/
void DisString(byte urow, byte ucol, char *str)
{
     byte i = 0;
		
	SetDisAddr(urow, ucol);
	while (i < strlen(str))
	{
		WriteData(*(str + i));
		i++;
	}
}


void DisNum(byte urow, byte ucol, byte num)
{
 		SetDisAddr(urow, ucol);
		 WriteData('0'+ num);
}


void DisplayTime(byte hour,byte minute,byte second)
{
	 DisNum(1, 3, hour/16);
	 DisNum(1, 4, hour%16);
	 DisString(1, 5,":");
	 DisNum(1, 6, minute/16);
	 DisNum(1, 7, minute%16);
	 DisString(1, 8,":");
	 
	 DisNum(1, 10, second & 0x0f);
	 DisNum(1, 9, (second >> 4) &0x07);
}


void LCD_Dis_Float(byte urow,byte ucol,byte bvalue)
{
   byte i;
   byte tempdata[4];
   
   tempdata[0] = (bvalue)/100;
   if(tempdata[0]== 0) tempdata[0]= ' '-'0';
   tempdata[1] = (bvalue)%100/10;
   if((tempdata[0] == 0x00)&&(tempdata[1] == 0x00))
   {
      tempdata[1] = ' '-'0';
   }
   tempdata[2] = (bvalue)%10;
   tempdata[3] = '.'-'0';

    for(i = 0;i<4;i++) 
      DisNum(urow,ucol+i,tempdata[i]);
}

 void LCD_Dis_Temperature(byte urow,byte ucol, unsigned int rValue)	//温度数据转换和显示函数
{
    ClearLcd();
	DisString(0,1,"Temperature is:");
   if((rValue &0xf800) == 0xf800)
   {
   	   DisString(urow,ucol,"-");
       LCD_Dis_Float(urow,ucol+1,((byte)(~((rValue>>3)-1)))>>1);
   }
   else 
   {
     DisString(urow,ucol," ");
      LCD_Dis_Float(urow,ucol+1,(rValue>>4)&0xff);
    }
	 if((rValue&0x08)==0x08)
      DisString(urow,ucol+5,"5");
     else
      DisString(urow,ucol+5,"0");
	  DisCGRAM(urow, ucol+6, 0x00);
}



void LcdInit(void)
{
 	ClearLcd();	
	CurReturn(); 
	SetInputMode(1, 0); 
	SetDisMode(1, 0, 0); 
//	SetShift(0, 0);
	SetFunction(1, 1, 1);
//	SetCGRAMAddr();
    LCD_WriteCGRAM(CGRAMtab,8);
}