电阻屏五点触摸算法

void Calibration_five(void)
{
float a=0,b=0,c=0,d=0,e=0,
dx1=0,dx2=0,dx3=0,
dy1=0,dy2=0,dy3=0,
delt,
dtx1=0,dtx2=0,dtx3=0,dty1=0,dty2=0,dty3=0;

u16 xl[]={50,50,750,750,400};      //X 十字校准坐标
u16 yl[]={50,430,430,50,240};      //Y 十字校准坐标
u16 px[5],py[5];                   //读取的坐标值
u16 i,xtemp,ytemp;


for(i=0;i<5;i++)
{
LCD_SetTextColor(LCD_COLOR_CYAN);
LCD_DrawLine(xl[i]-15,yl[i],30,0);
LCD_DrawLine(xl[i],yl[i]-15,30,1);
LCD_DisplayStringLine(264, 16, 1, (uint8_t*)"请点击十字光标");
TSC2046_Read_Single(&px[i],&py[i]);
LCD_Clear(LCD_COLOR_WHITE);
LCD_DisplayStringLine(264, 16, 1, (uint8_t*)"                    ");
LCD_DisplayStringLine(264, 16, 1, (uint8_t*)"取点成功，请释放触笔");
while(TSC2046_Read_Position(&xtemp,&ytemp))
{
}
LCD_Clear(LCD_COLOR_WHITE);
}