#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
     
/* for data reading from /dev/ts */
typedef struct {
    unsigned short pressure;
    unsigned short x;
    unsigned short y;
    unsigned short pad;
} TS_EVENT;

/*
 * tstest application code, the start code of Linux touch screen application
 * compile :
 *          $/usr/local/arm/2.95.3/bin/arm-linux-gcc -o tstest tstest.c
 *          $cp tstest /tftpboot/examples
 * run in target:
 *          #mount 192.168.1.180:/tftpboot/ /mnt/nfs
 *          #cd /mnt/nfs/examples
 *          #./tstest
 */
int main(int argc, char **argv)
{
    static int ts = -1;
    static int mousex = 0;
    static int mousey = 0;
    static TS_EVENT ts_event;
    
    // touch screen
    printf("touch screen test program\n");
    printf("please touch the screen\n");
    ts = open ("/dev/ts", O_RDONLY);
    if (ts < 0) 
    {
        fprintf (stderr, "Can not open touch screen!\n");
        exit(1);
    }

    while(1)
    {
        read (ts, &ts_event, sizeof (TS_EVENT));
        if (ts_event.pressure > 0) 
        {
            printf ("mouse down: ts_event.x = %d, ts_event.y = %d\n", ts_event.x, ts_event.y);
        }
    }
}