tchscr.c

ads1.2的一个工程

//about touchScr
#include "..\startup\44b.h"
#include "..\inc\drv\LCD320.h"
#include "..\inc\drv\tchScr.h"
#include "..\inc\maro.h"
#include "..\inc\drv\flash.h"
#include "..\inc\drv\file.h"

#define ADS7843_CMD_X	(ADS7843_CTRL_START|ADS7843_GET_X|ADS7843_CTRL_12MODE|ADS7843_CTRL_DFR|ADS7843_CTRL_ENPWD)
#define ADS7843_CMD_Y	(ADS7843_CTRL_START|ADS7843_GET_Y|ADS7843_CTRL_12MODE|ADS7843_CTRL_DFR|ADS7843_CTRL_ENPWD)

int TchScr_Xmax=1840,TchScr_Xmin=176,
	TchScr_Ymax=195,TchScr_Ymin=1910;
extern U32 ConfigSysdata[];
extern U8 isConfigsysLoad;

void LoadAxisMax()
{
	if(!isConfigsysLoad)
		return;

	TchScr_Xmax=ConfigSysdata[0];
	TchScr_Xmin=ConfigSysdata[1];
	TchScr_Ymax=ConfigSysdata[2];
	TchScr_Ymin=ConfigSysdata[3];
	if(TchScr_Xmax==TchScr_Xmin || TchScr_Ymax==TchScr_Ymin){
		TchScr_Xmax=1846;//1840
		TchScr_Xmin=230;//176
		TchScr_Ymax=195;
		TchScr_Ymin=1910;
		Uart_Printf("\nerror touch screen data!");
		LCD_printf("error touch screen data!\n");
		return;
	}
	Uart_Printf("\nLoad touch screen data OK!\n");
	LCD_printf("Load touch screen data OK!\n");
}

void TchScr_init()
{
	/*7				6		5					4				3		2			1:0			*/
	/*Internal clock,MSB mode,Transmit/Receive mode,falling edge clock,No action,Non hand-shaking mode,SIO interrupt mode*/
	/*0				0			1				0				0			0		01*/
	rSIOCON=0x21;//0x31;
	rSBRDR=15;//15;//band rate = 60MHz/2/(15+1)=1.875MHz
	rIVTCNT=7;//7;//Intervals=60MHz/4/(7+1)=1.875MHz

	LoadAxisMax();
}

void TchScr_GetScrXY(int *x, int *y)
{
	unsigned int temp;

	rPDATC&=~ADS7843_PIN_CS;

	SendSIOData(ADS7843_CMD_X);
	SendSIOData(0);
	temp=ReadSIOData();
	SendSIOData(ADS7843_CMD_X);
	temp<<=8;
	temp|=ReadSIOData();
	*x=(temp>>4);

	SendSIOData(0);
	temp=ReadSIOData();
	SendSIOData(ADS7843_CMD_X);
	temp<<=8;
	temp|=ReadSIOData();
	*x+=(temp>>4);

	SendSIOData(0);
	temp=ReadSIOData();
	SendSIOData(ADS7843_CMD_X);
	temp<<=8;
	temp|=ReadSIOData();
	*x+=(temp>>4);

	SendSIOData(0);
	temp=ReadSIOData();
	SendSIOData(ADS7843_CMD_Y);
	temp<<=8;
	temp|=ReadSIOData();
	*x+=(temp>>4);
	*x>>=2;		//x=x/4;
	
	SendSIOData(0);
	temp=ReadSIOData();
	SendSIOData(ADS7843_CMD_Y);
	temp<<=8;
	temp|=ReadSIOData();
	*y=(temp>>4);

	SendSIOData(0);
	temp=ReadSIOData();
	SendSIOData(ADS7843_CMD_Y);
	temp<<=8;
	temp|=ReadSIOData();
	*y+=(temp>>4);
	
	SendSIOData(0);
	temp=ReadSIOData();
	SendSIOData(ADS7843_CMD_Y);
	temp<<=8;
	temp|=ReadSIOData();
	*y+=(temp>>4);

	SendSIOData(0);
	temp=ReadSIOData();
	SendSIOData(0);
	temp<<=8;
	temp|=ReadSIOData();
	*y+=(temp>>4);
	*y>>=2;		//y=y/4;

	rPDATC|=ADS7843_PIN_CS;

	*x=(*x-TchScr_Xmin)*LCDWIDTH/(TchScr_Xmax-TchScr_Xmin);
	*y=(*y-TchScr_Ymin)*LCDHEIGHT/(TchScr_Ymax-TchScr_Ymin);
}