加入定时器使用范例

1 files changed, 82 insertions, 0 deletions

diff --git a/examples/test/hwtimer_test.c b/examples/test/hwtimer_test.c
new file mode 100644
index 0000000000..e90f5c4783
--- /dev/null
+++ b/examples/test/hwtimer_test.c
@@ -0,0 +1,82 @@
+#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("HT %d\n", rt_tick_get());
+
+    return 0;
+}
+
+int hwtimer(int freq, int t)
+{
+    rt_err_t err;
+    rt_hwtimerval_t val;
+    rt_device_t dev = RT_NULL;
+    rt_tick_t tick;
+    rt_hwtimer_mode_t mode;
+
+    t = (t <= 0)? 5 : t;
+
+    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;
+    }
+
+    rt_device_set_rx_indicate(dev, timer_timeout_cb);
+    /* ����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;
+    }
+
+    /* ���ö�ʱ����ʱֵ */
+    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;
+    }
+
+    /* ����ģʽ */
+    mode = HWTIMER_MODE_PERIOD;
+    err = rt_device_control(dev, HWTIMER_CTRL_MODE_SET, &mode);
+    /* ������ʱ�� */
+    tick = rt_tick_get();
+    err = rt_device_control(dev, HWTIMER_CTRL_START, RT_NULL);
+    rt_kprintf("Start Timer> Tick: %d\n", tick);
+    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);
+
+EXIT:
+    err = rt_device_close(dev);
+    rt_kprintf("Close %s\n", TIMER);
+
+    return err;
+}
+
+FINSH_FUNCTION_EXPORT(hwtimer, "Test hardware timer");
+#endif