#include "head.c"


/*
sbit TP_CS=P3^4;
sbit TP_LT=P0^3;
#define TP_PORT P2

sbit TP_DATA_IN=P2^7;

sbit TP_CLK=P3^7;

sbit TP_DATA_OUT=P2^5;
sbit TP_BUSY=P2^6;
*/
unsigned int tp_read(unsigned char a)
{
unsigned char k,temp;
unsigned int k_temp;


//S,A2,A1,A0   MODE,SER/DEF,PD1,PD0
#define TP_MODE 0x81

TP_CLK=0;
TP_DATA_IN=0;
TP_CS=0;
nop;
TP_DATA_OUT=1;

//TP_PORT=0xff;


//TP_LT=0;
//TP_BUSY=1;
//while(TP_BUSY);//wait for TP not busy.
if(a==1)
temp=TP_MODE|0x10;//read Y1
if(a==2)
temp=TP_MODE|0x50;//read Y1
if(a==3)
temp=TP_MODE|0x20;//read Y1
if(a==4)
temp=TP_MODE|0x60;//read Y1

nop; nop; 
nop; nop; 
for(k=0;k<8;k++)
{
nop; 
if((temp&0x80)==0)
	TP_DATA_IN=0;
else 
	TP_DATA_IN=1;
nop;
TP_CLK=1;nop;
temp=temp<<1;
TP_CLK=0;
}
TP_DATA_IN=0;



//delay(1);
 
TP_CLK=1;
TP_CLK=0;  
 
TP_BUSY=1;
while(TP_BUSY);//wait for TP not busy.
 
k_temp=0;

//TP_DATA_OUT=1;///------------------------------------------///
//TP_CLK=1;

nop;
for(k=11;k!=255;k--)
{
nop; 
TP_CLK=0;
nop; 
if(TP_DATA_OUT!=0)
	k_temp=k_temp|(1<<k);

//if(k==4||k==3)
//	{nop;}
TP_CLK=1;
}
TP_CS=1;
 //printi(k_temp);
if(k_temp>300)
{
	if(a==1)
		k_temp=(k_temp-300)/10;//y scale(when a==1)
	else
		k_temp=(k_temp-300)/14;//x scale (when a==2)
}
else
	k_temp=0;
/*
if(k_temp>320)//y max
	k_temp=320;

if(a==2&&(k_temp>240))//x max
	k_temp=240;

*/
//printi(k_temp);
//putenter();
//printi(k_temp);
return k_temp;
}