int
bcm_timer_change_expirytime(bcm_timer_id timer_id, const struct itimerspec *timer_spec)
{
bcm_timer_cancel(timer_id);
bcm_timer_settime(timer_id, timer_spec);
return 1;
}
int
bcmgpio_strobe_start (int gpio_pin, bcmgpio_strobe_t *strobe_info)
{
unsigned long regout;
int status;
struct itimerspec its;
assert ((gpio_pin >= 0) && (gpio_pin <= BCMGPIO_MAXINDEX));
if (! strobe_info->timer_module) {
GPIO_ERROR ("bcmgpio_strobe: Invalid timer module ID\n");
return -1;
}
if (! bcmgpio_info[gpio_pin].connected)
return -1;
if (bcmgpio_info[gpio_pin].dirn == BCMGPIO_DIRN_IN)
return -1;
if (bcmgpio_info[gpio_pin].strobing)
return 0;
if ((status = bcm_timer_create (strobe_info->timer_module, &bcmgpio_info[gpio_pin].timer_id)) != 0) {
bcmgpio_info[gpio_pin].timer_id = 0;
GPIO_ERROR ("bcmgpio_strobe: Timer creation failed with error %d\n", status);
return -1;
}
if ((status = bcm_timer_connect (bcmgpio_info[gpio_pin].timer_id, (bcm_timer_cb) bcmgpio_timercb, (int) gpio_pin)) != 0) {
bcm_timer_delete (bcmgpio_info[gpio_pin].timer_id);
bcmgpio_info[gpio_pin].timer_id = 0;
GPIO_ERROR ("bcmgpio_strobe: Timer connect failed with error %d\n", status);
return -1;
}
its.it_interval.tv_sec = 0;
its.it_interval.tv_nsec = BCMGPIO_STRB_NS_TIME;
its.it_value.tv_sec = 0;
its.it_value.tv_nsec = BCMGPIO_STRB_NS_TIME;
if ((status = bcm_timer_settime (bcmgpio_info[gpio_pin].timer_id, &its)) != 0) {
bcm_timer_delete (bcmgpio_info[gpio_pin].timer_id);
bcmgpio_info[gpio_pin].timer_id = 0;
GPIO_ERROR ("bcmgpio_strobe: Timer set failed with error %d\n", status);
return -1;
}
regout = bcmgpio_ioctl (BCMGPIO_REG_OUT, 0, 0);
bcmgpio_info[gpio_pin].orig_state = regout & ((unsigned long) 1 << gpio_pin);
bcmgpio_info[gpio_pin].strobe_period = strobe_info->strobe_period_in_ms / BCMGPIO_STRB_MS_TIME;
bcmgpio_info[gpio_pin].on_time =
(strobe_info->duty_percent * bcmgpio_info[gpio_pin].strobe_period) / 100;
bcmgpio_info[gpio_pin].tot_strobes = strobe_info->num_strobes;
bcmgpio_info[gpio_pin].strobe_count = 0;
bcmgpio_info[gpio_pin].timer_count = 0;
bcmgpio_info[gpio_pin].strobing = 1;
bcmgpio_info[gpio_pin].strobe_done = strobe_info->strobe_done;
if (bcmgpio_info[gpio_pin].strobe_done != NULL)
*(bcmgpio_info[gpio_pin].strobe_done) = 0;
return 0;
}
