lcd.c

1、数控直流恒流源的单片机代码。 2、重要包括电源、输入处理、A/D采集、键盘、LCD显示、D/A输出。

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

//IO输入输出控制
void InitLCDData(bit i) 
{
	if(i==1) LCDData = 0xff;
	else     LCDData = 0x00;
	} 

//指令/数据选择函数：SetLCD_RS()
void  SetLCD_RS(bit i)
{
	if(i==1) LCDRS = 1;
	else     LCDRS = 0;
	}

//读写操作控制信号：SetLCD_RW()
void SetLCD_RW(bit i)
{
	if(i==1) LCDRW = 1;
	else     LCDRW = 0;
	}

//使能信号：SetLCD_EN()
void SetLCD_EN(bit i)
{
	if(i==1) LCDE = 1;
	else     LCDE = 0;
	}	
	
//复位：SetLCD_RST()
void SetLCD_RST(bit i)
{
	if(i==1) LCDRST = 1;
	else     LCDRST = 0;
	}

//读状态函数：ReadStatus()
INT8U ReadStatus(void)
{
  INT8U i;
  InitLCDData(1);
  SetLCD_RW(1);
  SetLCD_RS(0);
  SetLCD_EN(0);
  nNop(10);
  SetLCD_EN(1);
  nNop(20);
  i = LCDData;
  nNop(40);
  SetLCD_EN(0);
  return(i);
}

//读一字节数据函数：ReadOneByte()
INT8U ReadOneByte(void)
{
  INT8U i;
  InitLCDData(1);
  SetLCD_RW(1);
  SetLCD_RS(1);
  SetLCD_EN(0);
  nNop(10);
  SetLCD_EN(1);
  nNop(20);
  i = LCDData;
  nNop(40);
  SetLCD_EN(0);
  return(i);
}

//写指令函数：WriteInstruc()
void WriteInstruc(INT8U Instruction)
{
  while((ReadStatus() & 0x80)!= 0x00);
  InitLCDData(0);
  SetLCD_RW(0);
  SetLCD_RS(0);
  SetLCD_EN(0);
  LCDData = Instruction;
  nNop(100);
  SetLCD_EN(1);
  nNop(100);
  SetLCD_EN(0);  
}

//写一字节数据函数：WriteOneByte()
void WriteOneByte(INT8U Data)
{
  while((ReadStatus() & 0x80)!= 0x00);
  InitLCDData(0);
  SetLCD_RW(0);
  SetLCD_RS(1);
  SetLCD_EN(0);
  LCDData = Data;
  nNop(100);
  SetLCD_EN(1);
  nNop(100);
  SetLCD_EN(0);
}

//复位函数：ResetLCD()
void ResetLCD(void)
{
  LDelay(40);
  SetLCD_RST(0);
  LDelay(1);
  SetLCD_RST(1);
  LDelay(1);
}

//初始化函数：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);
}

//显示一个汉字(16x16)函数：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  
}


//显示两个字符(8x16)函数：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);
 }