lcdser.cpp

wince下ST7920串口驱动

// LcdSer.cpp : Defines the entry point for the application.
//

#include "LcdSer.h"





CItsLcd::CItsLcd()
{	
	if (FALSE == MapPIO())
	{
		RETAILMSG(DBGMSGON,(_T("::Lcd map io space failed!!\n")));
	}
	
	if (FALSE == lcd_init())
	{
		RETAILMSG(DBGMSGON,(_T("::Init lcd failed!!\n"))); 
	}
}

CItsLcd::~CItsLcd()
{
	if (v_pIOPRegs) 
	{
		VirtualFree((PVOID) v_pIOPRegs, 0, MEM_RELEASE);
        v_pIOPRegs = NULL;
	}
}

void CItsLcd::LCD_PowerUp()
{
	CtlCode(EXIT_SLEEP_MODE);
	CtlCode(FOUNCTION_SET_RE0_8BIT);
}

void CItsLcd::LCD_PowerDown()
{
	CtlCode(FOUNCTION_SET_RE1_8BIT_ENPLOT);
	CtlCode(ENTER_SLEEP_MODE);
}


BOOL CItsLcd::MapPIO()
{
	BOOL RetValue;
	
	v_pIOPRegs = (volatile IOPreg*)VirtualAlloc(0, sizeof(MEMreg), MEM_RESERVE, PAGE_NOACCESS);
	if (v_pIOPRegs == NULL) 
	{
		RetValue = FALSE;
	}
	else 
	{ 
		if (!VirtualCopy((PVOID)v_pIOPRegs, (PVOID)IOP_BASE, sizeof(MEMreg), PAGE_READWRITE | PAGE_NOCACHE)) 
		{
			RetValue = FALSE;
		}
	}
	
	if (!RetValue) 
	{//InitializeAddresses - Failed !!		
		if (v_pIOPRegs) 
		{
			VirtualFree((PVOID) v_pIOPRegs, 0, MEM_RELEASE);
		}
		v_pIOPRegs = NULL;
		return(RetValue);
	}

    v_pIOPRegs->rGPBCON &= (~(0x3<<20));
	v_pIOPRegs->rGPBCON |= (0x1<<20);
	v_pIOPRegs->rGPBCON &= (~(0x3<<14));
	v_pIOPRegs->rGPBCON |= (0x1<<14);
	v_pIOPRegs->rGPBCON &= (~(0x3<<10));
	v_pIOPRegs->rGPBCON |= (0x1<<10);
	
    return(RetValue);  	
}

BOOL CItsLcd::lcd_init() 
{ 
	UCHAR command_data; 
	Delay_n_us(40); 
	command_data=0x30; 
	CtlCode(command_data); /*功能设置:一次送8位数据,基本指令集*/ 
	command_data=0x06; 
	CtlCode(command_data); /*点设定:显示字符/光标从左到右移位,DDRAM地址加1*/ 
	command_data=0x0c; 
	CtlCode(command_data); /*显示设定:开显示,不显示光标,不允许当前显示位反白闪动*/ 
	command_data=0x01; 
	CtlCode(command_data); /*清DDRAM*/ 
	command_data=0x02; 
	CtlCode(command_data); /*DDRAM地址归位*/ 
	command_data=0x80; 
	CtlCode(command_data); /*把显示地址设为0X80，即为第一行的首位*/ 

	return TRUE;
}

void CItsLcd::CtlCode(UCHAR command_data) 
{ 
	UCHAR i, temp;
	temp = 0xf8; 
	Delay_n_us(100); 
	if (0x20 == (command_data & 0xe0))
	{  //function set, save it.
		cCurrentFun = command_data;
	}
	
	LCD_CS(TRUE);  
	for(i = 0; i < 8; i++) 
	{ 
		LCD_SET_DAT(temp&0x80); 
		LCD_SCLK_JUMP(); 
		temp <<= 1;
	}
	
	LCD_SEND_BYTE(command_data);
	
	LCD_CS(FALSE); 
}

void CItsLcd::LCDPrint(PCHAR DatStr, CHAR Position)
{
	UCHAR i, temp;
	temp = 0xfa; 
	Sleep(1); 
	
	if (Position != NULL)
	{
		CtlCode(Position);
	}
	
	LCD_CS(TRUE);  
	for(i = 0; i < 8; i++) 
	{ 
		LCD_SET_DAT(temp&0x80); 
		LCD_SCLK_JUMP(); 
		temp <<= 1;
	} 
	
	while(*DatStr != '\0')
	{
		LCD_SEND_BYTE(*DatStr);
		DatStr++;
	}
	
	LCD_CS(FALSE); 
}

void CItsLcd::LCDPrint(PCHAR DatStr, INT iVar, CHAR Position)
{
	CHAR temp, temp1, cItoChr[10], DatBuffer[21]; 
	INT i = 0, j = 0;
	
	while (*DatStr != '\0')
	{
		temp = *DatStr;
		temp1 = *(DatStr+1);
		if ('%' == temp)
		{
			switch(temp1)
			{
			case 'd':
			case 'D':
				_itoa(iVar, cItoChr, 10);
				break;
			case 'x':
			case 'X':
				_itoa(iVar, cItoChr, 16);
			    break;
			default:
				_itoa(iVar, cItoChr, 10);
			    break;
			}
			
			RETAILMSG(DBGMSGON, (_T("strlen(cItoChr) = %d\n"), strlen(cItoChr)));
			while (cItoChr[j] != '\0')
			{
				DatBuffer[i] = cItoChr[j];
				i++;
				j++;
				RETAILMSG(DBGMSGON, (_T("::::::::i = %d j = %d\n"), i, j));
			}
			if (i%2 != 0)
			{
				DatBuffer[i] = 0x20;
				i++;
			}
			DatStr += 2;
		}
		DatBuffer[i] = *DatStr;
		i++;
		DatStr++;
		RETAILMSG(DBGMSGON, (_T("i = %d\n"), i));
	}
	DatBuffer[i] = '\0';
	
	LCDPrint(DatBuffer, Position);
}

void CItsLcd::LCD_ReverseVideo(DWORD row)
{
	BYTE FunTemp;
	FunTemp = cCurrentFun;
	if ((cCurrentFun & 0x34) != 0x34)
	{
		CtlCode(0x34);
	}
	switch(row)
	{
	case 1:
		CtlCode(0x04);
		break;
	case 2:
		CtlCode(0x05);
		break;
	}
	CtlCode(FunTemp);
}
void CItsLcd::LCD_Cursor(DWORD OnorOff, CHAR Position)
{
	if (0 == OnorOff)
	{
		CtlCode(0x0c);
	}
	else
	{
		CtlCode(Position);
		CtlCode(0x0d);
	}	
}

	

//GPB10  片选
void CItsLcd::LCD_CS(BOOL x)
{
	if (TRUE == x)
	{//设置为高电平
		v_pIOPRegs->rGPBDAT |= (1<<10);
	}
	else
	{
		(v_pIOPRegs->rGPBDAT &= ~(1<<10));
	}
}

//GPB5 数据传输
void CItsLcd::LCD_SET_DAT(BOOL x)
{
	if (x != 0)
	{//设置为高电平
		v_pIOPRegs->rGPBDAT |= (1<<5);
	}
	else
	{
		(v_pIOPRegs->rGPBDAT &= ~(1<<5));
	}
}
//GPB7 模拟时钟
void CItsLcd::LCD_SCLK_JUMP()
{
	v_pIOPRegs->rGPBDAT |= (1<<7);
	Delay_n_us(1);
	(v_pIOPRegs->rGPBDAT &= ~(1<<7));
	//Sleep(1);
}

void CItsLcd::LCD_SEND_BYTE(UCHAR dat)
{
	UCHAR temp, i;
	 
	temp = dat; 
	temp &= 0xf0; 
	for(i = 0; i < 8; i++) 
	{ 
		LCD_SET_DAT(temp&0x80); 
		LCD_SCLK_JUMP(); 
		temp <<= 1;
	} 
	temp = dat;
	temp &=0x0f;
	temp <<= 4;
	temp &= 0xf0; 
	for(i = 0; i < 8; i++) 
	{
		LCD_SET_DAT(temp&0x80); 
		LCD_SCLK_JUMP(); 
		temp <<= 1;
	}
}

void CItsLcd::Delay_n_us(int n)
{ 
	
	LARGE_INTEGER litmp; 
	LONGLONG QPart1,QPart2; 
	double dfMinus, dfFreq, dfTim; 
	if(QueryPerformanceFrequency(&litmp)==FALSE) 
	{ 
		return;
	} 
	dfFreq = (double)litmp.QuadPart; 
	QueryPerformanceCounter(&litmp); 
	QPart1 = litmp.QuadPart; 
	do 
	{ 
		QueryPerformanceCounter(&litmp); 
		QPart2=litmp.QuadPart; 
		dfMinus=(double)(QPart2-QPart1); 
		dfTim=dfMinus/dfFreq; 
	}while(dfTim <0.000001*n); 
	
}