1 #include <rtthread.h> 2 #include <rtdevice.h> 3 #include <finsh.h> 4 5 #ifdef RT_USING_HWTIMER 6 7 #define TIMER "timer0" 8 9 static rt_err_t timer_timeout_cb(rt_device_t dev, rt_size_t size) 10 { 11 rt_kprintf("enter hardware timer isr\n"); 12 13 return 0; 14 } 15 16 int hwtimer(void) 17 { 18 rt_err_t err; 19 rt_hwtimerval_t val; 20 rt_device_t dev = RT_NULL; 21 rt_tick_t tick; 22 rt_hwtimer_mode_t mode; 23 int freq = 10000; 24 int t = 5; 25 26 if ((dev = rt_device_find(TIMER)) == RT_NULL) 27 { 28 rt_kprintf("No Device: %s\n", TIMER); 29 return -1; 30 } 31 32 if (rt_device_open(dev, RT_DEVICE_OFLAG_RDWR) != RT_EOK) 33 { 34 rt_kprintf("Open %s Fail\n", TIMER); 35 return -1; 36 } 37 38 /* ʱ����� */ 39 /* ����ʱ������(Ĭ��1Mhz��֧�ֵ���С����Ƶ��) */ 40 err = rt_device_control(dev, HWTIMER_CTRL_FREQ_SET, &freq); 41 if (err != RT_EOK) 42 { 43 rt_kprintf("Set Freq=%dhz Fail\n", freq); 44 goto EXIT; 45 } 46 47 /* ����ģʽ */ 48 mode = HWTIMER_MODE_PERIOD; 49 err = rt_device_control(dev, HWTIMER_CTRL_MODE_SET, &mode); 50 51 tick = rt_tick_get(); 52 rt_kprintf("Start Timer> Tick: %d\n", tick); 53 /* ���ö�ʱ����ʱֵ��������ʱ�� */ 54 val.sec = t; 55 val.usec = 0; 56 rt_kprintf("SetTime: Sec %d, Usec %d\n", val.sec, val.usec); 57 if (rt_device_write(dev, 0, &val, sizeof(val)) != sizeof(val)) 58 { 59 rt_kprintf("SetTime Fail\n"); 60 goto EXIT; 61 } 62 rt_kprintf("Sleep %d sec\n", t); 63 rt_thread_delay(t*RT_TICK_PER_SECOND); 64 65 /* ֹͣ��ʱ�� */ 66 err = rt_device_control(dev, HWTIMER_CTRL_STOP, RT_NULL); 67 rt_kprintf("Timer Stoped\n"); 68 /* ��ȡ���� */ 69 rt_device_read(dev, 0, &val, sizeof(val)); 70 rt_kprintf("Read: Sec = %d, Usec = %d\n", val.sec, val.usec); 71 72 /* ��ʱִ�лص����� -- ����ģʽ */ 73 /* ���ó�ʱ�ص����� */ 74 rt_device_set_rx_indicate(dev, timer_timeout_cb); 75 76 /* ����ģʽ */ 77 mode = HWTIMER_MODE_PERIOD; 78 err = rt_device_control(dev, HWTIMER_CTRL_MODE_SET, &mode); 79 80 /* ���ö�ʱ����ʱֵ��������ʱ�� */ 81 val.sec = t; 82 val.usec = 0; 83 rt_kprintf("SetTime: Sec %d, Usec %d\n", val.sec, val.usec); 84 if (rt_device_write(dev, 0, &val, sizeof(val)) != sizeof(val)) 85 { 86 rt_kprintf("SetTime Fail\n"); 87 goto EXIT; 88 } 89 90 /* �ȴ��ص�����ִ�� */ 91 rt_thread_delay((t + 1)*RT_TICK_PER_SECOND); 92 93 EXIT: 94 err = rt_device_close(dev); 95 rt_kprintf("Close %s\n", TIMER); 96 97 return err; 98 } 99 #ifdef FINSH_USING_MSH 100 MSH_CMD_EXPORT(hwtimer, "Test hardware timer"); 101 #endif 102 #endif /* RT_USING_HWTIMER */ 103