int main()
{
Clr_BUFFER_FLAG();
alt_video_display Display;
TOUCH_HANDLE *pTouch;
printf("Hi There !\n");
// Write 0x3C on LED[6:0] through the dedicated custom IP
IOWR(LED_CTRL_BASE, 0x0, 0x3C);
// TOUCH INITIALIZATION
pTouch = Touch_Init(LT24_TOUCH_SPI_BASE, LT24_TOUCH_PENIRQ_N_BASE, LT24_TOUCH_PENIRQ_N_IRQ);
if (!pTouch){
printf("Failed to init touch\r\n");
}else{
printf("Init touch successfully\r\n");
}
// LCD INITIALIZATION
LCD_Init();
// Pattern example
//LCD_Pattern_Horizon();
// Sleep 3s
//usleep(3*1000*1000);
Set_BUFFER_FLAG();
unsigned int X, Y;
unsigned int posTamper =0;
while(1){
if(Touch_GetXY(pTouch, &X, &Y)){
//printf("X: %d Y: %d\n",X,Y);
LCD_WR_DATA(Y);
LCD_WR_REG(X);
//we can modify the character (the image become progressively red when we touch it), we might do the same for the background
IOWR_16DIRECT(PIC_MEM_BASE,posTamper,0xF800);
posTamper++;
}
}
// Painter demo
/*Clr_BUFFER_FLAG();
Display.interlace = 0;
Display.bytes_per_pixel = 2;
Display.color_depth = 16;
Display.height = SCREEN_HEIGHT;
Display.width = SCREEN_WIDTH;
GUI(&Display, pTouch);*/
return 0;
}
/************************************************
** Touch_Adjust :
** Code for touch screen calibration
** Get 4 calibration parameters
************************************************/
void Touch_Adjust(void)
{
u8 i;
u16 pos_temp[4][2];
u16 d1,d2;
u32 tem1,tem2;
float fac;
while(1){
for(i=0;i<4;i++){
Refreshes_Screen();
if(i==0){
Drow_Touch_Point(20,20);
Touch_GetXY(&pos_temp[0][0],&pos_temp[0][1],1);
}
else if(i == 1){
Drow_Touch_Point(220,20);
Touch_GetXY(&pos_temp[1][0],&pos_temp[1][1],1);
}
else if(i == 2){
Drow_Touch_Point(20,300);
Touch_GetXY(&pos_temp[2][0],&pos_temp[2][1],1);
}
else {
Drow_Touch_Point(220,300);
Touch_GetXY(&pos_temp[3][0],&pos_temp[3][1],1);
}
}
tem1=abs(pos_temp[0][0]-pos_temp[1][0]); //x1-x2
tem2=abs(pos_temp[0][1]-pos_temp[1][1]); //y1-y2
tem1*=tem1;
tem2*=tem2;
d1=sqrt(tem1+tem2);
tem1=abs(pos_temp[2][0]-pos_temp[3][0]); //x3-x4
tem2=abs(pos_temp[2][1]-pos_temp[3][1]); //y3-y4
tem1*=tem1;
tem2*=tem2;
d2=sqrt(tem1+tem2);
fac=(float)d1/d2;
if(fac<0.95||fac>1.05||d1==0||d2==0)
{
continue;
}
tem1=abs(pos_temp[0][0]-pos_temp[2][0]); //x1-x3
tem2=abs(pos_temp[0][1]-pos_temp[2][1]); //y1-y3
tem1*=tem1;
tem2*=tem2;
d1=sqrt(tem1+tem2);
tem1=abs(pos_temp[1][0]-pos_temp[3][0]); //x2-x4
tem2=abs(pos_temp[1][1]-pos_temp[3][1]); //y2-y4
tem1*=tem1;
tem2*=tem2;
d2=sqrt(tem1+tem2);
fac=(float)d1/d2;
if(fac<0.95||fac>1.05)
{
continue;
}
tem1=abs(pos_temp[1][0]-pos_temp[2][0]); //x1-x3
tem2=abs(pos_temp[1][1]-pos_temp[2][1]); //y1-y3
tem1*=tem1;
tem2*=tem2;
d1=sqrt(tem1+tem2);
tem1=abs(pos_temp[0][0]-pos_temp[3][0]); //x2-x4
tem2=abs(pos_temp[0][1]-pos_temp[3][1]); //y2-y4
tem1*=tem1;
tem2*=tem2;
d2=sqrt(tem1+tem2);
fac=(float)d1/d2;
if(fac<0.95||fac>1.05)
{
continue;
}
xfac=(float)220/(pos_temp[1][0]-pos_temp[0][0]);
xoff=(240-xfac*(pos_temp[1][0]+pos_temp[0][0]))/2;
yfac=(float)300/(pos_temp[2][1]-pos_temp[1][1]);
yoff=(320-yfac*(pos_temp[2][1]+pos_temp[1][1]))/2;
LCD_Clear(BLACK);
break;
}
}
