#include<reg51.h>
#include"Config.h"
#include"IOCfg.c"
#include"TimeDLY.h"
#include"IIC_PCA8574.h"
#include"LCD.h"

bit x;

//IO輸入輸出控制
void InitLCDData(bit i) 
{
	if(i==1) x=PCA8574_PutOne(0x41,0xff);
	else     x=PCA8574_PutOne(0x41,0x00);
	} 

//指令/數據選擇函數：SetLCD_RS()
void  SetLCD_RS(bit i)
{
	if(i==1) x=PCA8574_PutOne(0x40,0x20);
	else     x=PCA8574_PutOne(0x40,0x00);
	}

//讀寫操作控制信號：SetLCD_RW()
void SetLCD_RW(bit i)
{
	if(i==1) x=PCA8574_PutOne(0x40,0x40);
	else     x=PCA8574_PutOne(0x40,0x00);
	}

//使能信號：SetLCD_EN()
void SetLCD_EN(bit i)
{
	if(i==1) x=PCA8574_PutOne(0x40,0x10);
	else     x=PCA8574_PutOne(0x40,0x00);
	}	
	
//復位：SetLCD_RST()
void SetLCD_RST(bit i)
{
	if(i==1) x=PCA8574_PutOne(0x40,0x80);
	else     x=PCA8574_PutOne(0x40,0x00);
	}

//讀狀態函數：ReadStatus()
INT8U ReadStatus(void)
{
  INT8U i;
  InitLCDData(1);
  SetLCD_RW(1);
  SetLCD_RS(0);
  SetLCD_EN(0);
  nNop(10);
  SetLCD_EN(1);
  nNop(20);
  x=PCA8574_GetOne(0x41,i);
  nNop(40);
  SetLCD_EN(0);
  return(i);
}

//讀一字節數據函數：ReadOneByte()
INT8U ReadOneByte(void)
{
  INT8U i;
  InitLCDData(1);
  SetLCD_RW(1);
  SetLCD_RS(1);
  SetLCD_EN(0);
  nNop(10);
  SetLCD_EN(1);
  nNop(20);
  x=PCA8574_GetOne(0x41,i);
  nNop(40);
  SetLCD_EN(0);
  return(i);
}

//寫指令函數：WriteInstruc()
void WriteInstruc(INT8U Instruction)
{
  while((ReadStatus() & 0x80)!= 0x00);
  InitLCDData(0);
  SetLCD_RW(0);
  SetLCD_RS(0);
  SetLCD_EN(0);
  x=PCA8574_PutOne(0x41,Instruction);
  nNop(100);
  SetLCD_EN(1);
  nNop(100);
  SetLCD_EN(0);  
}

//寫一字節數據函數：WriteOneByte()
void WriteOneByte(INT8U Data)
{
  while((ReadStatus() & 0x80)!= 0x00);
  InitLCDData(0);
  SetLCD_RW(0);
  SetLCD_RS(1);
  SetLCD_EN(0);
  x=PCA8574_PutOne(0x41,Data);
  nNop(100);
  SetLCD_EN(1);
  nNop(100);
  SetLCD_EN(0);
}

//復位函數：ResetLCD()
void ResetLCD(void)
{
  LDelay(40);
  SetLCD_RST(0);
  LDelay(1);
  SetLCD_RST(1);
  LDelay(1);
}

//初始化函數：InitLCD()
void InitLCD(void)
{
  ResetLCD();
  FunctionSet(0x30); // Function Set: 8_bits_Data, Base_Instrution
  LDelay(1);
  FunctionSet(0x30); // Function Set: 8_bits_Data, Base_Instrution
  LDelay(1);
  Disp_OnOff(0x0c);  // Disp_ON: The Whole ALL_ON
  LDelay(1);
  ClearLCD();        // Clear LCD
  LDelay(1);
  PointSet(0x06);    // Entry Mode Set: DDRAM Address Counter(AC) + 1
  LDelay(1);
}

//顯示一個漢字(16x16)函數：DispOneWord()
void DispOneWord(INT8U X,INT8U Y,INT16U Word)
{
  INT8U Disp_Address;
  INT8U Address_H;
  INT8U Address_L;
  
  if((X == 0x00)||(X == 0x02)) // 0,2行
  	Address_H = 0x80;
  else // 1,3行
  	Address_H = 0x90;
  	
  if((X == 0x00)||(X == 0x01)) // 0,1行
  	Address_L = Y;
  else // 2,3行
  	Address_L = Y + 0x08;
  Disp_Address = (Address_H | Address_L) & 0xff;
  SetDDRAM_Add(Disp_Address); 				// Set DDRAM(Disp_Address)
  WriteOneByte(((Word & 0xff00) >> 8) & 0xff); // H_Byte
  WriteOneByte(Word & 0xff);		 // L_Byte  
}


//顯示兩個字符(8x16)函數：DispTwoCharacter()
void DispTwoCharacter(INT8U X,INT8U Y,INT8U Character1,INT8U Character2)
{
  INT8U Disp_Address;
  INT8U Address_H;
  INT8U Address_L;
  
  if((X == 0x00)||(X == 0x02)) // 0,2行
  	Address_H = 0x80;
  else // 1,3行
  	Address_H = 0x90;
  	
  if((X == 0x00)||(X == 0x01)) // 0,1行
  	Address_L = Y;
  else // 2,3行
  	Address_L = Y + 0x08;
  Disp_Address = Address_H | Address_L;
  SetDDRAM_Add(Disp_Address); // Set DDRAM(Disp_Address)
  WriteOneByte(Character1);
  WriteOneByte(Character2);
 }