xpt2046的简易驱动

说明使用的一个网友发表的文件，提取了触摸屏部分

.h部分

#ifndef  touch_H
#define  touch_H

#define touch
#define CMD_RDY 0X90  //0B10010000即用差分方式读X坐标
#define CMD_RDX 0XD0  //0B11010000即用差分方式读Y坐标              
#define TEMP_RD 0XF0  //0B11110000即用差分方式读Y坐标
#define  ZLG7290  0x70   

#define  SubKey   0x01
#define  SubCmdBuf  0x07
#define  SubDpRam  0x10
#define  ZLG7290I2C_frequence 25000

extern uint8 key;         
extern uint8 key_value_renew;       //按键中断标志   
extern uint8 key_value_break;           //按键中断标志     
extern machine_work_state mystate;
//extern void __irq irq_EINT3(void);

#define CHX  0x90
#define CHY  0xD0

#define T_CS     ((unsigned int)1<<17)
#define T_CLK    ((unsigned int)1<<18)
#define T_DIN    ((unsigned int)1<<16)
#define T_INT    ((unsigned int)1<<30)
#define T_DOUT   ((unsigned int)1<<2)

//#define TP_BUSY  (1<<21)

#define TP_CLK_0 IO0CLR = IO0CLR | T_CLK
#define TP_CLK_1 IO0SET = IO0SET | T_CLK

#define TP_CS_0     IO0CLR = IO0CLR | T_CS
#define TP_CS_1     IO0SET = IO0SET | T_CS

#define TP_DIN_0 IO0CLR = IO0CLR | T_DIN
#define TP_DIN_1 IO0SET = IO0SET | T_DIN

#define TP_DOUT     ( IO0PIN & T_DOUT )
#define TP_INT_IN    ( IO0PIN & T_INT )

extern void Init_TouchPannel_Port(void);

//-----------------------------------------------------------------------
//@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
//-----------------------------------------------------------------------
//-----------------------内部函数----------------------------------------
extern void WR_CMD(unsigned char cmd);
extern unsigned short RD_AD(void);
extern unsigned short Read_X(void);
extern unsigned short Read_Y(void);
 //------------------------------------
extern void TP_GetAdXY(int *x,int *y);
extern unsigned char CheckTP_INT(void);
extern unsigned int touch_x_value;
extern unsigned int touch_y_value;
extern machine_work_state mystate;
#endif

.c部分

#include "config.h"

//#define SPI_REAL
//---------------------------------------------------------------
//---------------------------------------------------------------
//---------------------------------------------------------------

//------------ADS7843 GPIO Pin Config------------------------------------
//Write To ADS7843's Pin

//-----------------------------------------------------------------------
//#define TP_IRQ  (IO0PIN&TP_INT)//for check pressed
//---------------------------------------------------------

//-----------------------------------------------------------------------
//@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
//-----------------------------------------------------------------------
//----------------------具体函数实现-------------------------------------
//---------------------------------------------------------
unsigned short xt,yt;//touch data fit LCD,adjusted!!!!!!
unsigned short xr,yr;//real touch data from ad

unsigned int touch_x_value;
unsigned int touch_y_value;

//---------------------------------------------------------
unsigned char CheckTP_INT(void)
{
 return (IO0PIN&T_INT);
}
//-----------------------------------------------------------------------
void Init_TouchPannel_Port(void)
{
 PINSEL0 &= ~(0x03 << (2 * 2)); //设置P0.2接GPIO  Dout 液晶屏的数据输出引脚
 IO0DIR &= ~(1 << 2); //dout  数据输入端
 

 PINSEL1 &= ~(0x03 << (16 *2 - 32));
 IO0CLR |= (1 << 16); // din 数据输出端
 IO0SET |= T_DIN;

 PINSEL1 &= ~(0x03 << (17 *2 - 32));
 IO0CLR |= (1 << 17); //cs
 IO0SET |= T_CS;

 PINSEL1 &= ~(0x03 << (18 *2 - 32));
 IO0CLR |= (1 << 18);  //clk
 IO0SET |= T_CLK;
 
 PINSEL1 &= ~(0x03 << (30 *2 - 32));
 IO0CLR &= ~(1 << 30); //int
 IO0SET |= T_INT;

}
//------------------------------------------------------------
void WR_CMD(unsigned char cmd)
{
 unsigned char i;

 TP_CS_1;
 TP_DIN_0;
 TP_CLK_0;
 TP_CS_0;  
   
 for(i=0;i<8;i++)
 {
  if(cmd&0x80) TP_DIN_1;
  else TP_DIN_0;

  TP_CLK_1;
  cmd<<=1;
  TP_CLK_0; 
 }
}
//---------------------------------------------------
unsigned short RD_AD(void)
{
 unsigned short OutData=0;
 unsigned char i;

 TP_DIN_0;
 TP_CLK_1;

 for(i=0;i<12;i++)
 {
  OutData<<=1;
  TP_CLK_0;   
  if(IO0PIN&T_DOUT)
   OutData|=0x0001;
  TP_CLK_1;
 }
 for(i=0;i<4;i++)
 {
  TP_CLK_1;
  TP_CLK_0;
 } 
 TP_CS_1;

 return(OutData);
}
//---------------------------------------------------
unsigned short Read_X(void)
{
 unsigned short OutData;
 
 WR_CMD(CHX);
 OutData=RD_AD();
 return OutData;  
}
//---------------------------------------------------
unsigned short Read_Y(void)
{
 unsigned short OutData;
 
 WR_CMD(CHY);
 OutData=RD_AD();
 return OutData;   
}

//------------------------------------------------------
void TP_GetAdXY(int *x,int *y)
{
#define TIME  10   //循环读数次数 最大16次
 unsigned char t=0,t1,count=0;
 unsigned char X_EABLE=0,Y_EABLE=0;
 unsigned short databuffer[TIME]={0,0,0,0,0,0,0,0,0,0};//数据组
 unsigned short temp=0; 
 while(TP_INT_IN==0&&count<TIME)//循环读数
 {      
  databuffer[count]=Read_X() ;
  count++;
 } 
 if(count==TIME)//一定要读到TIME次数据,否则丢弃
 { 
     do//将数据X升序排列
  { 
   t1=0;   
   for(t=0;t<count-1;t++)
   {
    if(databuffer[t]>databuffer[t+1])//升序排列
    {
     temp=databuffer[t+1];
     databuffer[t+1]=databuffer[t];
     databuffer[t]=temp;
     t1=1;
    } 
   }
  }while(t1);              
  *x=(databuffer[TIME/2-1]+databuffer[TIME/2]+databuffer[TIME/2+1])/3;
  X_EABLE=1;  
 }  

 count=0;
    while(TP_INT_IN==0&&count<TIME) //循环读数TIME次
 {      
  databuffer[count]=Read_Y();
  count++; 
 } 
 if(count==TIME)//一定要读到TIME次数据,否则丢弃
 { 
     do//将数据X升序排列
  { 
   t1=0;   
   for(t=0;t<count-1;t++)
   {
    if(databuffer[t]>databuffer[t+1])//升序排列
    {
     temp=databuffer[t+1];
     databuffer[t+1]=databuffer[t];
     databuffer[t]=temp;
     t1=1;
    } 
   }
  }while(t1);              
  *y=(databuffer[TIME/2-1]+databuffer[TIME/2]+databuffer[TIME/2+1])/3;
  Y_EABLE=1;  
 }
 

 

}
//-----------------------------------------------------
//-----------------------------------------------------------