niosii怎么驱动xpt2046

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;

}

}

//-----------------------------------------------------

//--------------------------------------------------------------------------------------

//@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

//-----------------------------End of TouchPannel_ARM.H---------------------------------