Kontron KTAM3874-pITX - Manual (Page 266)

KTD-S0057-I Page 262 Linux® Programming Examples (DebianTM)
KTAM3874/pITX Software Guide
if (!strcasecmp (param1, WD_TRIG) && fd_wd)
{
if (write (fd_wd, "\0", 1) != 1)
return -1; /* fd_wd is not closed to give a second chance */
return 0;
}
return -1;
}
int parse_gpio (char cmd_line[], int *val)
{
static int fd_io = 0;
static int gp_num = 0;
static int gp_dir = -1;
const char delim[] = " ,;:-";
char *param1, *param2, *param3;
cmd_line [strlen (cmd_line) - 1] = '\0'; /* remove CR */
strsep (&cmd_line, delim); /* suppress the command */
param1 = strsep (&cmd_line, delim);
param2 = strsep (&cmd_line, delim);
param3 = strsep (&cmd_line, delim);
*val = -1;
if ((param1 == (char *) NULL) || (param2 == (char *) NULL))
return -1;
if (!strcasecmp (param2, IO_OPEN) && param3 != (char *) NULL && !fd_io)
{
int fd_tmp, gpio;
char str [64];
gpio = atoi (param1);
if ((gpio < 0) || (gpio > 39))
return -1;
if (strcasecmp (param3, IO_IN) && strcasecmp (param3, IO_OUT))
return -1;
if ((fd_tmp = open (io_exp, 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);
sprintf (str, io_dir, io_num[gpio]);
if ((fd_tmp = open (str, O_WRONLY)) < 0)
return -1;