//***************液晶顯示****************//(未實測)
/********************************************************
*液晶(1602) DATA(4 bit)
**************this file include funtion******************
*void LcdDisplayRam(unsigned char X, unsigned char Y, unsigned char *DData,unsigned char Leng);
*void LcdDisplayRom(unsigned char X, unsigned char Y, unsigned char *DData,unsigned char Leng);
*void LcdInit(void);
********************************************************/
/*入口設置:
#define LCD_DATA PORTD     //define data directional register(用高4位)
#define LCD_DATA_DI DDRD   //define setup port directional register
#define LCD_DATA_IN  PIND  //define inport register
#define CTLPORT PORTC      //模擬總線用了PD口的PD5,PD6,PD7
#define LCD_RS  3          // pin-0 on CTLPORT
#define LCD_RW  4          // pin-1 on CTLPORT
#define LCD_E   5          // pin-2 on CTLPORT
*/

#define SET_LCD_E       CTLPORT|=(1<<LCD_E)        // LCD: E = 1
#define CLR_LCD_E       CTLPORT&=~(1<<LCD_E)       // LCD: E = 0
#define SET_LCD_RW      CTLPORT|=(1<<LCD_RW)       // LCD: R/W = 1 (read)
#define CLR_LCD_RW      CTLPORT&=~(1<<LCD_RW)      // LCD: R/W = 0 (write)
#define SET_LCD_RS      CTLPORT|=(1<<LCD_RS)       // LCD: R/S = 1 (data reg)
#define CLR_LCD_RS      CTLPORT&=~(1<<LCD_RS)      // LCD: R/S = 0 (status reg)

//*******************************************************************寫數據11//
void WriteDataLCM(unsigned char WDLCM)
 {
 ReadStatusLCM(); //檢測忙 
 SET_LCD_RS;
 CLR_LCD_RW;
 LCD_DATA =(LCD_DATA_IN&0x0f)|(WDLCM&0xF0); 
 CLR_LCD_E;CLR_LCD_E;
 SET_LCD_E;SET_LCD_E;
 WDLCM<<=4;
 LCD_DATA =(LCD_DATA_IN&0x0f)|(WDLCM&0xF0); 
 CLR_LCD_E;CLR_LCD_E;
 SET_LCD_E;SET_LCD_E;
}
//********************************************************************寫指令12//
void WriteCommandLCM(unsigned char WDLCM,unsigned char BuysC) //BuysC為0時忽略忙檢測
{
 if (BuysC) ReadStatusLCM(); //根據需要檢測忙 
 CLR_LCD_RS;
 CLR_LCD_RW;
 LCD_DATA =(LCD_DATA_IN&0x0f)|(WDLCM&0xF0);
 CLR_LCD_E;CLR_LCD_E;
 SET_LCD_E;SET_LCD_E;
 WDLCM<<=4;
 LCD_DATA =(LCD_DATA_IN&0x0f)|(WDLCM&0xF0);
 CLR_LCD_E;CLR_LCD_E;
 SET_LCD_E;SET_LCD_E;
}
//*******************************************************************讀狀態13//
void ReadStatusLCM(void)
{
 LCD_DATA_DI = 0x00; //輸入
 CLR_LCD_RS;
 SET_LCD_RW;
 CLR_LCD_E;CLR_LCD_E;
 SET_LCD_E;SET_LCD_E;
 while (LCD_DATA_IN&0x80); //檢測忙信號
 LCD_DATA_DI=0xff;//變回輸出
}
//*************************************************************顯示一個字符14//
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
{
 Y &= 0x1; X &= 0xF;
 if (Y) X |= 0x40;
 X |= 0x80;
 WriteCommandLCM(X, 1);
 WriteDataLCM(DData);
 WriteCommandLCM(X, 1);
}
//************************************************************顯示ROM字符串15//
void LcdDisplayRom(unsigned char X, unsigned char Y, const unsigned char *DData,unsigned char Leng)
{
 unsigned char j;
 Y &= 0x01;X &= 0x0F;
 for(j=0;j<Leng;X++,j++)
  {
  if(X<=0xf)DisplayOneChar(X,Y,DData[j]);
  }
}
//************************************************************顯示RAM字符串16//
void LcdDisplayRam(unsigned char X, unsigned char Y, unsigned char *DData,unsigned char Leng)
{
 unsigned char j;
 Y &= 0x01;X &= 0x0F;
 for(j=0;j<Leng;X++,j++)
  {
  if(X<=0xf)DisplayOneChar(X,Y,DData[j]);
  }
}		
//****************************************************************LCM初始化17//
void LcdInit(void) 
{
 LCD_DATA &=0x0f;
 LCD_DATA_DI=0xf0;
 WriteCommandLCM(0x38,0); //三次顯示模式設置，不檢測忙信號
 DelayMs(5);
 WriteCommandLCM(0x38,0);
 DelayMs(5);
 WriteCommandLCM(0x38,0);
 DelayMs(5);
 WriteCommandLCM(0x38,1); //顯示模式設置,開始要求每次檢測忙信號
 WriteCommandLCM(0x08,1); //關閉顯示
 WriteCommandLCM(0x01,1); //顯示清屏
 WriteCommandLCM(0x06,1); // 顯示光標移動設置
 WriteCommandLCM(0x0C,1); // 顯示開及光標設置
}