tstest.c

来自「该源码是创维特ARM7 JX44B0X板的例子程序」· C语言 代码 · 共 55 行

#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
     
/* for data reading from /dev/ts */
typedef struct ts_event_1{
    int x,y;
    int dx,dy;
    int event;
    int state;
    int ev_no;
    unsigned long ev_time;
}ts_pen_info;

/*
 * tstest application code, the start code of Linux touch screen application
 * compile :
 *          $arm-elf-gcc -Wl,-elf2flt -o tstest tstest.c
 *          $cp tstest /tftpboot/examples
 * run in target:
 *          #cd /var
 *          #ftp 192.168.1.180
 *          ftp>bin
 *          ftp>cd /tftpboot/examples
 *          ftp>get tstest
 *          ftp>by
 *          #./tstest
 */
int main(int argc, char **argv)
{
    static int ts = -1;
    static int mousex = 0;
    static int mousey = 0;
    static ts_pen_info 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_pen_info));
        if (ts_event.event > 0) 
        {
            printf ("mouse down: ts_event.x = %d, ts_event.y = %d\n", ts_event.x, ts_event.y);
        }
    }
}