tp.c

《基于s3c44B0X嵌入式uCLinux系统原理及应用》李岩编的ppt

#include <stdio.h>
#include "..\inc\option.h"
#include "..\inc\def.h"
#include "..\inc\44b.h"
#include "..\inc\44blib.h"
#include "..\inc\tp.h"
#include "..\inc\44blcd.h"
#include "..\inc\lcdlib.h"

volatile unsigned char  adcend=0;
#define frameBuffer1   0xc400000
void display(U32 xdot,U32 line);
void Adc_or_TsSep(void);

void Adc_or_TsSep(void)
{
    int i,x,y;
    U32 Pt[6];
     rI_ISPC=BIT_EINT3;	//clear pending_bit

	//TSPX(GPE4) TSPY(GPE5) TSMY(GPE6) TSMX(GPE7)
        //  0		1	    0          1
	rPDATE=0XA8;
	// <X-Position Read>
	rADCCON=0x1<<2;			// AIN1
	Delay(400);			//delay to set up the next channel
	for(i=0;i<5;i++)
	{
    	    rADCCON|=0x1;		// Start X-position conversion
	    while(rADCCON & 0x1);	// Check if Enable_start is low
    	    while(!(rADCCON & 0x40));	// Check ECFLG
	    Pt[i]=(0x3ff&rADCDAT);
	}
	y=(Pt[0]+Pt[1]+Pt[2]+Pt[3]+Pt[4])/5;

    	// <Y-Position Read>
    	//TSPX(GPE4) TSPY(GPE5) TSMY(GPE6) TSMX(GPE7)
        //  1		0	      1          0
	rPDATE=0X58;
	rADCCON=0x0<<2;			// AIN0
	Delay(400);			//delay to set up the next channel
	for(i=0;i<5;i++)
	{
    	    rADCCON|=0x1;		// Start X-position conversion
	    while(rADCCON & 0x1);	// Check if Enable_start is low
    	    while(!(rADCCON & 0x40));	// Check ECFLG
	    Pt[i]=(0x3ff&rADCDAT);
	}
	x=(Pt[0]+Pt[1]+Pt[2]+Pt[3]+Pt[4])/5;
	if(x>1000)
		return;
	x=((900-x)/38);
	if(y>700)
		y=((y-50)/17);
	else if(y>200)
		y=((y-50)/18);
	else
		y=((y-60)/24);
	Uart_Printf("  X-Posion[AIN0] is %04d  ",x);
	Uart_Printf("  Y-Posion[AIN1] is %04d\n", y);
	clrscreen();
	display(x,y);
    	adcend=1;
    	rPDATE=0X78;	//should be enabled
    	Delay(200);			//delay to set up the next channel
}


void Ts_Sep(void)
{
     int i;

    //TSPX(GPE4) TSPY(GPE5) TSMY(GPE6) TSMX(GPE7)
    //  1		1	 1          0
    rPUPE=0x1;
    rPDATE=0x78;	//should be enabled
    Delay(200);		//delay to set up the next channel
    Uart_Printf("[Touch Screen Test.]\n");
    Uart_Printf("Separate X/Y position conversion mode test\n");

    LcdInit();
    rEXTINT=0x22222222;
    rINTCON=0x5;
    pISR_EINT3=(int)Adc_or_TsSep;

    rCLKCON=0x7ff8;
    rADCPSR=0x4;
    rINTMSK=~(BIT_GLOBAL|BIT_EINT3);

    Uart_Printf("\nType any key to exit!!!\n");
    Uart_Printf("\nStylus Down, please...... \n");

    while(1);

    rINTMSK |=BIT_GLOBAL|BIT_EINT3;
    Uart_Printf("[Touch Screen Test Over]\n");

}
void LcdInit(void)
{
  Lcd_MonoInit();
  clrscreen();
}

void Lcd_MonoInit(void)
{
    //160x240 1bit/1pixel LCD
    #define MVAL_USED 0

	rLCDCON1=(0)|(1<<5)|(MVAL_USED<<7)|(0x3<<8)|(0x3<<10)|(CLKVAL_MONO<<12);
	    // disable,4B_SNGL_SCAN,WDLY=8clk,WLH=8clk,
	rLCDCON2=(LINEVAL)|(HOZVAL<<10)|(10<<21);
	    //LINEBLANK=10 (without any calculation)
	rLCDSADDR1= (0x0<<27) | ( ((U32)frameBuffer1>>22)<<21 ) | M5D((U32)frameBuffer1>>1);
	    // monochrome, LCDBANK, LCDBASEU
	rLCDSADDR2= M5D( (((U32)frameBuffer1+(SCR_XSIZE*LCD_YSIZE/8))>>1) ) | (MVAL<<21)|(1<<29);
	rLCDSADDR3= (LCD_XSIZE/16) | ( ((SCR_XSIZE-LCD_XSIZE)/16)<<9 );

	rLCDCON1=(1)|(1<<5)|(MVAL_USED<<7)|(0x3<<8)|(0x3<<10)|(CLKVAL_MONO<<12);
	    // enable,4B_SNGL_SCAN,WDLY=8clk,WLH=8clk,
}

void clrscreen(void)
{
  int i,j;
	U32 *pbuffer;

	pbuffer =(U32*) frameBuffer1;
 	for (i=0;i<1200;i++)
       {
     		pbuffer[i] =0x0;
	}
}

void display(U32 xdot,U32 line)
{
     unsigned char *pbuffer;
     unsigned char i;

     pbuffer =(U8*) frameBuffer1;

    for (i=0;i<8;i++)
   {
   	pbuffer[20*5*line+xdot+i*20]=0xff;}

}