源码地址：https://github.com/774639008/MyProject/commit/2129384d2e0004dc859caa4d8b81d8669ecf5850?diff=unified
这是tsc.c文件
#include"s3c2440.h"
#include"tsc.h"
#include"lcd.h"
#include"irq.h"
#include "graphics.h"
#include "type.h"
#include #define TSC_WAIT_DOWN (0xd3)//等待按下中断
#define TSC_WAIT_UP (0x1d3)//等待抬起中断
#define TSC_AUTO_XY (0xc) //自动X Y轴采样
//设置常见的寄存器参数
#define PRSCVL (49<<6) //预分频值，ADCCLK = PCLK/(PRSCVL+1)<2.5M，现在设置为1MHZ
#define PRSCEN (1<<14) //预分频使能位
#define ADCCON_VAL (PRSCVL | PRSCEN) //其他位不设置
//设置消除抖动延时
//X-Tal = 3.6864MHZ,实际工作的时候
#define DELAY1 (36864) //默认消除抖动延时10ms，所以 DELAY1=10ms*X-Tal=10/1000 * 3.6864MHZ
//采样转换延时，采用PCLK,同时等待时间 > 5个周期的ADCCLK 也就是时间>1/1MHZ*5*2=10us
//在实际的测量环境中，长一点测量的值比较稳定，但是过长会导致出现抬起的时候被采样到，所以一般设置值 100us-5ms
//这边设置成1ms左右
#define DELAY2 (4000)//这个可以调整的
#define Y_BEGIN (165)
#define X_BEGIN (947) //变大往右，变小往左
#define Y_END (878)
#define X_END (80) //变大往右，变小往左
#define TSP_SAMPLE_NUM 8 //采样点数
#define TSP_INVALIDLIMIT 10 //有效分布范围
#define TSP_CHANGE 20 //前后点有效具体范围
#define PLENGTH(x1,y1,x2,y2) sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2))
int touch_optimize(int x[],int y[],int *px,int *py)
{
int dx,dy;
int j,k,temp;
//------------------------------------------------
// if mask it ,very tremble work not well
for(j=0;j < TSP_SAMPLE_NUM-1;++j)
{
for(k=j+1;k < TSP_SAMPLE_NUM;++k)
{
if(x[j]>x[k])
{
temp = x[j];
x[j] = x[k];
x[k] = temp;
}
if(y[j]>y[k])
{
temp = y[j];
y[j] = y[k];
y[k] = temp;
}
}
}
//概率分布权重法
*px = (x[2] + ((x[3]+x[4])<<1) + (x[3]+x[4]) + x[5]);
*py = (y[2] + ((y[3]+y[4])<<1) + (y[3]+y[4]) + y[5]);
if((*px & 0x7) > 3)
*px = (*px >> 3)+1;
else
*px = (*px >> 3);
if((*py & 0x7) > 3)
*py = (*py >> 3)+1;
else
*py = (*py >> 3);
dx = x[5] - x[2];
dy = y[5] - y[2];
return ((dx > TSP_INVALIDLIMIT || dy > TSP_INVALIDLIMIT) ? 0 : 1);
}
void tsc2pos(pos_t *pPos)
{
pPos->x = min(pPos->x,X_BEGIN);
pPos->x = max(pPos->x,X_END);
pPos->y = min(pPos->y,Y_END);//注意 X和Y 不同
pPos->y = max(pPos->y,Y_BEGIN);
//坐标转换
pPos->x = (LCD_WIDTH-1)*(X_BEGIN - pPos->x) / (X_BEGIN - X_END);
pPos->y = (LCD_HIGH-1)*(pPos->y - Y_BEGIN) / (Y_END - Y_BEGIN);
}
int tsc_adc(pos_t *pPos)
{
int x[TSP_SAMPLE_NUM],y[TSP_SAMPLE_NUM];
int i,px,py;
static pos_t old;
if(!(ADCDAT0 & (1<<15)))
{
for(i=0;ix = px;
pPos->y = py;
tsc2pos(pPos);
if(old.x == 0 && old.y ==0)
{
old = *pPos;
return 1;
}
else if(PLENGTH(old.x,old.y,pPos->x,pPos->y)< TSP_CHANGE)
{
old = *pPos;
return 1;
}
}
}
else
{
old.x = 0;
old.y = 0;
}
return 0;
}
static void tsc_updn_irq(void)
{
if(ADCDAT0 & (1<<15))//抬起状态
{
ADCTSC = TSC_WAIT_DOWN;
// lcd_clean(0,0,480,272,GREEN);
}
else//按下状态
{
ADCTSC = TSC_WAIT_UP;
// lcd_clean(0,0,480,272,GREEN);
}
}
void tsc_init(void)
{
//1 设置ADCCON,设置转换器的AD频率
ADCCON = ADCCON_VAL;
//2 设置触摸屏为等待按下中断模式
ADCTSC = TSC_WAIT_DOWN;
//3 设置消除抖动延时
ADCDLY = DELAY1;
//4 安装触摸屏中断
irq_install(IRQ_SUB_TC,tsc_updn_irq);
}
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这是tsc.h文件
#ifndef _TOUCH_H_
#define _TOUCH_H_
#include "snake.h"
void tsc_init(void);
int tsc_adc(pos_t *pPos);
#endif