[bsp/simulator] Add windows rtc driver.

Author: armink

bsp/simulator/drivers/drv_rtc.c

@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-04-13     armink       the first version
+ */
+
+#include <sys/time.h>
+#include <string.h>
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#ifdef RT_USING_RTC
+
+static struct rt_device rtc_dev;
+
+#ifdef RT_USING_ALARM
+
+static struct rt_rtc_wkalarm wkalarm;
+static struct rt_timer alarm_time;
+
+static void alarm_timeout(void *param)
+{
+    rt_alarm_update(param, 1);
+}
+
+static void soft_rtc_alarm_update(struct rt_rtc_wkalarm *palarm)
+{
+    rt_tick_t next_tick;
+
+    if (palarm->enable)
+    {
+        next_tick = RT_TICK_PER_SECOND;
+        rt_timer_control(&alarm_time, RT_TIMER_CTRL_SET_TIME, &next_tick);
+        rt_timer_start(&alarm_time);
+    }
+    else
+    {
+        rt_timer_stop(&alarm_time);
+    }
+}
+
+#endif
+
+static rt_err_t soft_rtc_control(rt_device_t dev, int cmd, void *args)
+{
+    __time32_t *t;
+    struct tm *newtime;
+
+    RT_ASSERT(dev != RT_NULL);
+
+    switch (cmd)
+    {
+    case RT_DEVICE_CTRL_RTC_GET_TIME:
+    {
+        t = (__time32_t *)args;
+        _time32(t);
+        /* TODO The libc time module not support timezone now. So get the time from locatime. */
+        newtime = _localtime32(t);
+        *t = _mkgmtime32(newtime);
+        break;
+    }
+    case RT_DEVICE_CTRL_RTC_SET_TIME:
+    {
+#ifdef RT_USING_ALARM
+        soft_rtc_alarm_update(&wkalarm);
+#endif
+        break;
+    }
+#ifdef RT_USING_ALARM
+    case RT_DEVICE_CTRL_RTC_GET_ALARM:
+        *((struct rt_rtc_wkalarm *)args) = wkalarm;
+        break;
+    case RT_DEVICE_CTRL_RTC_SET_ALARM:
+        wkalarm = *((struct rt_rtc_wkalarm *)args);
+        soft_rtc_alarm_update(&wkalarm);
+        break;
+#endif
+    }
+
+    return RT_EOK;
+}
+
+#ifdef RT_USING_DEVICE_OPS
+const static struct rt_device_ops soft_rtc_ops =
+{
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+    soft_rtc_control
+};
+#endif
+
+int rt_win_rtc_init(void)
+{
+    static rt_bool_t init_ok = RT_FALSE;
+
+    if (init_ok)
+    {
+        return 0;
+    }
+    /* make sure only one 'rtc' device */
+    RT_ASSERT(!rt_device_find("rtc"));
+
+#ifdef RT_USING_ALARM
+    rt_timer_init(&alarm_time,
+        "alarm",
+        alarm_timeout,
+        &rtc_dev,
+        0,
+        RT_TIMER_FLAG_SOFT_TIMER | RT_TIMER_FLAG_ONE_SHOT);
+#endif
+
+    rtc_dev.type = RT_Device_Class_RTC;
+
+    /* register rtc device */
+#ifdef RT_USING_DEVICE_OPS
+    rtc_dev.ops = &soft_rtc_ops;
+#else
+    rtc_dev.init = RT_NULL;
+    rtc_dev.open = RT_NULL;
+    rtc_dev.close = RT_NULL;
+    rtc_dev.read = RT_NULL;
+    rtc_dev.write = RT_NULL;
+    rtc_dev.control = soft_rtc_control;
+#endif
+
+    /* no private */
+    rtc_dev.user_data = RT_NULL;
+
+    rt_device_register(&rtc_dev, "rtc", RT_DEVICE_FLAG_RDWR);
+
+    init_ok = RT_TRUE;
+
+    return 0;
+}
+INIT_BOARD_EXPORT(rt_win_rtc_init);
+
+#endif /* RT_USING_RTC */