Kontron KTAM3874-pITX - Manual (Page 267)

KTD-S0057-I Page 263 Linux® Programming Examples (DebianTM)
KTAM3874/pITX Software Guide
if (write (fd_tmp, param3, strlen (param3)) != strlen (param3))
{
close (fd_tmp);
return -1;
}
close (fd_tmp);
sprintf (str, io_val, io_num[gpio]);
if (!strcasecmp (param3, IO_IN))
{
if ((fd_io = open (str, O_RDONLY)) < 0)
return -1;
gp_dir = IO_DIR_IN;
}
else
{
if ((fd_io = open (str, O_WRONLY)) < 0)
return -1;
gp_dir = IO_DIR_OUT;
}
gp_num = gpio;
return 0;
}
if (!strcasecmp (param2, IO_CLOSE) && fd_io)
{
int fd_tmp, gpio;
char str [8];
gpio = atoi (param1);
if (gpio != gp_num)
return -1;
close (fd_io);
fd_io = 0;
if ((fd_tmp = open (io_unexp, O_WRONLY)) < 0)
return -1;
sprintf (str, "%d", io_num[gpio]);
if (write (fd_tmp, str, strlen (str)) != strlen (str))
{
close (fd_tmp);
return -1;
}
close (fd_tmp);
return 0;
}
if (!strcasecmp (param2, IO_DATA) && fd_io)
{
int gpio;
char str [8];
gpio = atoi (param1);
if (gpio != gp_num)
return -1;