Function rt_hwtimer_write

components/drivers/hwtimer/hwtimer.c:200–230

}

static rt_ssize_t rt_hwtimer_write(struct rt_device *dev, rt_off_t pos, const void *buffer, rt_size_t size)
{
    rt_base_t level;
    rt_uint32_t t;
    rt_hwtimer_mode_t opm = HWTIMER_MODE_PERIOD;
    rt_hwtimer_t *timer;

    timer = (rt_hwtimer_t *)dev;
    if ((timer->ops->start == RT_NULL) || (timer->ops->stop == RT_NULL))
        return 0;

    if (size != sizeof(rt_hwtimerval_t))
        return 0;

    timer->ops->stop(timer);

    level = rt_hw_interrupt_disable();
    timer->overflow = 0;
    rt_hw_interrupt_enable(level);

    t = timeout_calc(timer, (rt_hwtimerval_t*)buffer);
    if ((timer->cycles <= 1) && (timer->mode == HWTIMER_MODE_ONESHOT))
    {
        opm = HWTIMER_MODE_ONESHOT;
    }

    if (timer->ops->start(timer, t, opm) != RT_EOK)
        size = 0;

    return size;
}

static rt_err_t rt_hwtimer_control(struct rt_device *dev, int cmd, void *args)
{