docs/HowToUseTimer : Remove signo setting guide for timer notification
Timer interrupt sends FIN instead of signal, so we don't need to use signo anymore.
@@ -66,9 +66,8 @@ int fd = open(<TIMER_DEVICE_PATH>, O_RDONLY);
2. Set the notification to get time expiration
```
struct timer_notify_s notify;
-notify.arg = NULL; /* An argument to pass with the signal */
-notify.pid = (pid_t)getpid(); /* The ID of the task/thread to receive the signal */
-notify.signo = EXAMPLE_TIMER_SIGNO; /* The signal number to use in the notification */
+notify.arg = NULL; /* An argument to pass with the FIN */
+notify.pid = (pid_t)getpid(); /* The ID of the task/thread to receive the FIN */
ioctl(fd, TCIOC_NOTIFICATION, &notify);
```
@@ -80,14 +79,9 @@ ioctl(fd, TCIOC_SETTIMEOUT, time);
```
ioctl(fd, TCIOC_START, 0);
```
-5. Wait the signal using *sigwaitinfo* or *sigaction*
+5. Wait the notification using *fin_wait*
```
-sigset_t sig_set;
-sigemptyset(&sig_set);
-sigaddset(&sig_set, EXAMPLE_TIMER_SIGNO);
-pthread_sigmask(SIG_BLOCK, &sig_set, NULL);
-
-sigwaitinfo(&sig_set, NULL);
+fin_wait();
```
6. Stop the timer
```
