Mcu, add a dedicated task, only runs several times

Developers
1

hello, follow the adccmds task, I create a 1 second my_printf task, but it do not run continuously, it only runs several times, before it halted, the timer ticks are as follows:
my_printf_event: 2894236097
my_printf_task: 2894606682
could you help me, thanks

// Commands for controlling GPIO analog-to-digital input pins
//
// Copyright (C) 2016  Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.

#include "basecmd.h" // oid_alloc
#include "board/irq.h" // irq_disable
#include "sched.h" // DECL_TASK

struct my_printf_s {
    struct timer timer;
    uint32_t rest_ticks;
};

static struct task_wake my_printf_wake;


static uint_fast8_t
my_printf_event(struct timer *timer)
{
    struct my_printf_s *mp = container_of(timer, struct my_printf_s, timer);

    my_printf("%s: %lu\n", __FUNCTION__, timer_read_time());

    irq_disable();
    mp->timer.waketime = timer_read_time() + mp->rest_ticks;
    sched_wake_task(&my_printf_wake);
    irq_enable();

    return SF_RESCHEDULE;
}

void
my_printf_task(void)
{
    if (!sched_check_wake(&my_printf_wake))
        return;

    my_printf("%s: %lu\n", __FUNCTION__, timer_read_time());
}
DECL_TASK(my_printf_task);

static void 
my_printf_task_init()
{
    struct my_printf_s *mp = alloc_chunk(sizeof(*mp));

    mp->timer.func = my_printf_event;
    mp->timer.waketime = timer_read_time() + mp->rest_ticks;
    mp->rest_ticks = timer_from_us(1000000ul); // 1 second

    sched_add_timer(&mp->timer);
}
DECL_INIT(my_printf_task_init);