// Buzz open the gate, but not too much.
int buzz_open_gate(void) {
// if opened less than BUZZER_SOLENOID_REST_TIME, or buzzer_state == 1, return 1
// otherwise, open the gate and return 0
int result;
struct timeval now;
gettimeofday(&now, NULL);
int time_delta = (int)now.tv_sec - (int)last_buzzer_firing.tv_sec;
if (buzzer_state == 1 || time_delta < BUZZER_SOLENOID_REST_TIME) {
return(1);
} else {
result = enable_buzzer_solenoid();
buzzer_state = 1;
last_buzzer_firing = now;
return(result);
}
}
// Buzz open the gate, but not too much.
int buzz_open_gate(void) {
// if opened less than BUZZER_SOLENOID_REST_TIME ago, or buzzer_state == 1 already, return 1 (already opened)
// otherwise, open the gate and return 0 (success)
// This may also return -1 from the underlying calls to ioctl(2) in enable_buzzer_solenoid
int result;
struct timeval now;
gettimeofday(&now, NULL);
int time_delta = (int)now.tv_sec - (int)last_buzzer_firing.tv_sec;
if (buzzer_state == 1 || time_delta < BUZZER_SOLENOID_REST_TIME) {
#ifdef DEBUG
fprintf(stderr, "buzz_open_gate(): The buzzer has already been engaged. Returning 1\n");
#endif
return(1);
} else {
#ifdef DEBUG
fprintf(stderr, "buzz_open_gate(): enabling the buzzer solenoid\n");
#endif
result = enable_buzzer_solenoid();
buzzer_state = 1;
last_buzzer_firing = now;
return(result);
}
}
