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#include <rtthread.h>
#include <rtdevice.h>
#include <finsh.h>
#ifdef RT_USING_HWTIMER
#define TIMER "timer0"
static rt_err_t timer_timeout_cb(rt_device_t dev, rt_size_t size)
{
rt_kprintf("enter hardware timer isr\n");
return 0;
}
int hwtimer(void)
{
rt_err_t err;
rt_hwtimerval_t val;
rt_device_t dev = RT_NULL;
rt_tick_t tick;
rt_hwtimer_mode_t mode;
int freq = 10000;
int t = 5;
if ((dev = rt_device_find(TIMER)) == RT_NULL)
{
rt_kprintf("No Device: %s\n", TIMER);
return -1;
}
if (rt_device_open(dev, RT_DEVICE_OFLAG_RDWR) != RT_EOK)
{
rt_kprintf("Open %s Fail\n", TIMER);
return -1;
}
/* ʱ����� */
/* ����ʱ������(Ĭ��1Mhz��֧�ֵ���С����Ƶ��) */
err = rt_device_control(dev, HWTIMER_CTRL_FREQ_SET, &freq);
if (err != RT_EOK)
{
rt_kprintf("Set Freq=%dhz Fail\n", freq);
goto EXIT;
}
/* ����ģʽ */
mode = HWTIMER_MODE_PERIOD;
err = rt_device_control(dev, HWTIMER_CTRL_MODE_SET, &mode);
tick = rt_tick_get();
rt_kprintf("Start Timer> Tick: %d\n", tick);
/* ���ö�ʱ����ʱֵ��������ʱ�� */
val.sec = t;
val.usec = 0;
rt_kprintf("SetTime: Sec %d, Usec %d\n", val.sec, val.usec);
if (rt_device_write(dev, 0, &val, sizeof(val)) != sizeof(val))
{
rt_kprintf("SetTime Fail\n");
goto EXIT;
}
rt_kprintf("Sleep %d sec\n", t);
rt_thread_delay(t*RT_TICK_PER_SECOND);
/* ֹͣ��ʱ�� */
err = rt_device_control(dev, HWTIMER_CTRL_STOP, RT_NULL);
rt_kprintf("Timer Stoped\n");
/* ��ȡ���� */
rt_device_read(dev, 0, &val, sizeof(val));
rt_kprintf("Read: Sec = %d, Usec = %d\n", val.sec, val.usec);
/* ��ʱִ�лص����� -- ����ģʽ */
/* ���ó�ʱ�ص����� */
rt_device_set_rx_indicate(dev, timer_timeout_cb);
/* ����ģʽ */
mode = HWTIMER_MODE_PERIOD;
err = rt_device_control(dev, HWTIMER_CTRL_MODE_SET, &mode);
/* ���ö�ʱ����ʱֵ��������ʱ�� */
val.sec = t;
val.usec = 0;
rt_kprintf("SetTime: Sec %d, Usec %d\n", val.sec, val.usec);
if (rt_device_write(dev, 0, &val, sizeof(val)) != sizeof(val))
{
rt_kprintf("SetTime Fail\n");
goto EXIT;
}
/* �ȴ��ص�����ִ�� */
rt_thread_delay((t + 1)*RT_TICK_PER_SECOND);
EXIT:
err = rt_device_close(dev);
rt_kprintf("Close %s\n", TIMER);
return err;
}
#ifdef FINSH_USING_MSH
MSH_CMD_EXPORT(hwtimer, "Test hardware timer");
#endif
#endif /* RT_USING_HWTIMER */
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