Patch for ADS Bitsy Touchscreen

Bill_Thiede · May 14, 2002, 5:32pm

I wipped up some code to let me use SDL-1.2.4 with a touchscreen on a
StrongARM platform by Applieddata.net. The product can be seen here:

http://www.applieddata.net/products_bitsy.asp

It probably will work on any of their Linux products. It uses /dev/ts
which is setup by ADS’s kernel patches. The patch is attached. Hope maybe
this is useful to someone else too.

Bill Thiede
Cybernet Systems Corp.
http://www.cybernet.com

-------------- next part --------------
*** SDL-1.2.4/src/video/fbcon/SDL_fbevents.c Wed Mar 6 06:23:03 2002
— SDL-1.2.4.ads/src/video/fbcon/SDL_fbevents.c Tue May 14 10:34:08 2002***************
*** 317,322 ****
— 317,323 ----
MOUSE_MS,
MOUSE_BM,
MOUSE_ELO,

MOUSE_ADS,
NUM_MOUSE_DRVS
} mouse_drv = MOUSE_NONE;

*** 539,544 ****
— 540,555 ----
}
}
}

```
    /* Try ADS touchscreen */
```
```
    if ( mouse_fd < 0 ) {
```

            mouse_fd = open("/dev/ts", O_RDONLY, 0);

```
            if ( mouse_fd >= 0 ) {
```
#ifdef DEBUG_MOUSE

                    fprintf(stderr, "Using ADS touchscreen\n");

#endif

                    mouse_drv = MOUSE_ADS;

```
            }
```

    }
  /* Now try to use a modern PS/2 mouse */
  for ( i=0; (mouse_fd < 0) && ps2mice[i]; ++i ) {
  	mouse_fd = open(ps2mice[i], O_RDWR, 0);

*** 574,579 ****
— 585,591 ----
}
}
}
+
/* Default to a serial Microsoft mouse */
if ( mouse_fd < 0 ) {
if ( mousedev == NULL ) {

*** 602,607 ****
— 614,622 ----
}
}
if ( mouse_fd < 0 ) {

#ifdef DEBUG_MOUSE
fprintf(stderr, “Not using mouse”);
#endif
mouse_drv = MOUSE_NONE;
}
return(mouse_fd);

*** 649,659 ****
— 664,676 ----
{
static int start = 0;
static unsigned char mousebuf[BUFSIZ];

static short oldmousebuf[BUFSIZ];
static int relative = 1;

int i, nread;
int button = 0;
int dx = 0, dy = 0;
int packetsize = 0;
int realx, realy;

*** 674,679 ****
— 691,700 ----
case MOUSE_BM:
packetsize = 3;
break;

```
  case MOUSE_ADS:
```
```
  	packetsize = 3;
```
```
  	relative = 0;
```

        break;
  case MOUSE_ELO:
  	packetsize = ELO_PACKET_SIZE;
  	relative = 0;

*** 808,813 ****
— 829,862 ----
eloConvertXY(this, &dx, &dy);
break;
*/

```
        case MOUSE_ADS:
```
```
            {
```

                    short newdx, newdy;

                    memcpy(&newdx, &mousebuf[0], 2);

                    memcpy(&newdy, &mousebuf[2], 2);

                    button = mousebuf[4]>0?1:0;

```
                    if(newdx == -1)
```
```
                    {
```

                            dx = oldmousebuf[0];

```
                    }
```
```
                    else
```
```
                    {
```

                            dx = newdx;

                            oldmousebuf[0] = dx;

```
                    }
```
```
                    if(newdy == -1)
```
```
                    {
```

                            dy = oldmousebuf[1];

```
                    }
```
```
                    else
```
```
                    {
```

                            dy = newdy;

                            oldmousebuf[1] = dy;

```
                    }
```
```
            }
```

            break;

  	case MOUSE_ELO:
  	case NUM_MOUSE_DRVS: