Merge pull request #1223 from armink/add_soft_rtc

Add soft rtc

components/drivers/Kconfig

@@ -78,6 +78,25 @@ config RT_USING_RTC
     bool "Using RTC device drivers"
     default n
 
+    if RT_USING_RTC
+    config RT_USING_SOFT_RTC
+        bool "Using software simulation RTC device"
+        default n
+    config RTC_SYNC_USING_NTP
+        bool "Using NTP auto sync RTC time"
+        select PKG_NETUTILS_NTP
+        default n
+        
+        if RTC_SYNC_USING_NTP
+        config RTC_NTP_FIRST_SYNC_DELAY
+            int "NTP first sync delay time(second) for network connect"
+            default 30
+        config RTC_NTP_SYNC_PERIOD
+            int "NTP auto sync period(second)"
+            default 3600
+       endif
+    endif
+
 config RT_USING_SDIO
     bool "Using SD/MMC device drivers"
     default n

components/drivers/include/drivers/rtc.h

@@ -22,15 +22,13 @@
  * 2012-10-10     aozima       first version.
  */
 
-#ifndef RTC_H_INCLUDED
-#define RTC_H_INCLUDED
+#ifndef __RTC_H__
+#define __RTC_H__
 
-extern rt_err_t set_date(rt_uint32_t year,
-                         rt_uint32_t month,
-                         rt_uint32_t day);
+rt_err_t set_date(rt_uint32_t year, rt_uint32_t month, rt_uint32_t day);
+rt_err_t set_time(rt_uint32_t hour, rt_uint32_t minute, rt_uint32_t second);
 
-extern rt_err_t set_time(rt_uint32_t hour,
-                         rt_uint32_t minute,
-                         rt_uint32_t second);
+int rt_soft_rtc_init(void);
+int rt_rtc_ntp_sync_init(void);
 
-#endif // RTC_H_INCLUDED
+#endif /* __RTC_H__ */

components/drivers/rtc/README.md

@@ -0,0 +1,80 @@
+# RT-Thread RTC 设备
+
+## 1、介绍
+
+RT-Thread 的 RTC （实时时钟）设备为操作系统的时间系统提供了基础服务。面对越来越多的 IoT 场景，RTC 已经成为产品的标配，甚至在诸如 SSL 的安全传输过程中，RTC 已经成为不可或缺的部分。
+
+## 2、使用
+
+应用层对于 RTC 设备一般不存在直接调用的 API ，如果使用到 C 标准库中的时间 API （目前主要是获取当前时间的  `time_t time(time_t *t)`），则会间接通过设备的 control 接口完成交互。
+
+> 注意：目前系统内只允许存在一个 RTC 设备，且名称为 `"rtc"` 。
+
+### 2.1  设置日期
+
+```C
+rt_err_t set_date(rt_uint32_t year, rt_uint32_t month, rt_uint32_t day)
+```
+
+|参数                                    |描述|
+|:-----                                  |:----|
+|year                                    |待设置生效的年份|
+|month                                   |待设置生效的月份|
+|day                                     |待设置生效的日|
+
+### 2.2 设置时间
+
+```C
+rt_err_t set_time(rt_uint32_t hour, rt_uint32_t minute, rt_uint32_t second)
+```
+
+|参数                                    |描述|
+|:-----                                  |:----|
+|hour                                    |待设置生效的时|
+|minute                                  |待设置生效的分|
+|second                                  |待设置生效的秒|
+
+### 2.3 使用 Finsh/MSH 命令 查看/设置 日期和时间
+
+#### 2.3.1 查看日期和时间
+
+输入 `date` 即可，大致效果如下：
+
+```
+msh />date
+Fri Feb 16 01:11:56 2018
+msh />
+```
+
+#### 2.3.2 设置日期和时间
+
+同样使用 `date` 命令，在命令后面再依次输入 `年` `月` `日` `时` `分` `秒` （中间空格隔开, 24H 制），大致效果如下：
+
+```
+msh />date 2018 02 16 01 15 30    # 设置当前时间为 2018-02-16 01:15:30
+msh />
+```
+
+### 2.4 启用 NTP 时间自动同步
+
+如果 RT-Thread 已接入互联网，可启用 NTP 时间自动同步功能，定期同步本地时间。
+
+在 menuconfig 中启用 `RTC_SYNC_USING_NTP` 配置。启用该功能后，会自动开启 [netutils package](https://github.com/RT-Thread-packages/netutils) 的 NTP 功能。同时务必确保 RT-Thread 网络访问正常。
+
+启用该配置后，还有两个配置是用户可选配置：
+
+- `RTC_NTP_FIRST_SYNC_DELAY`: 首次执行 NTP 时间同步的延时。延时的目的在于，给网络连接预留一定的时间，尽量提高第一次执行 NTP 时间同步时的成功率。默认时间为 30S；
+- `RTC_NTP_SYNC_PERIOD`: NTP 自动同步周期，单位为秒，默认一小时（即 3600S）同步一次。
+
+> 注意：如果没有使用组件自动初始化功能，则需手动调用 `int rt_rtc_ntp_sync_init(void)` ，完成该功能初始化。
+
+### 2.5 启用 Soft RTC （软件模拟 RTC）
+
+这个模式非常适用于对时间精度要求不高，没有硬件 RTC 的产品。
+
+#### 2.5.1 使用方法
+
+在 menuconfig 中启用 `RT_USING_SOFT_RTC` 配置。
+
+> 注意：如果没有使用组件自动初始化功能，则需手动调用 `int rt_soft_rtc_init(void)` ，完成该功能初始化。
+

components/drivers/rtc/SConscript

@@ -7,6 +7,8 @@ rtc = ['rtc.c']
 
 rtc_alarm = ['alarm.c']
 
+soft_rtc = ['soft_rtc.c']
+
 CPPPATH = [cwd + '/../include']
 group = []
 
@@ -14,6 +16,8 @@ if GetDepend(['RT_USING_RTC']):
     src = src + rtc
     if GetDepend(['RT_USING_ALARM']): 
         src = src + rtc_alarm
+    if GetDepend(['RT_USING_SOFT_RTC']): 
+        src = src + soft_rtc
 
 group = DefineGroup('DeviceDrivers', src, depend = ['RT_USING_RTC'], CPPPATH = CPPPATH)
 

components/drivers/rtc/rtc.c

@@ -22,16 +22,31 @@
  * 2012-01-29     aozima       first version.
  * 2012-04-12     aozima       optimization: find rtc device only first.
  * 2012-04-16     aozima       add scheduler lock for set_date and set_time.
+ * 2018-02-16     armink       add auto sync time by NTP
  */
 
 #include <time.h>
 #include <string.h>
 #include <rtthread.h>
 
-/** \brief returns the current time.
+/* Using NTP auto sync RTC time */
+#ifdef RTC_SYNC_USING_NTP
+/* NTP first sync delay time for network connect, unit: second */
+#ifndef RTC_NTP_FIRST_SYNC_DELAY
+#define RTC_NTP_FIRST_SYNC_DELAY                 (30)
+#endif
+/* NTP sync period, unit: second */
+#ifndef RTC_NTP_SYNC_PERIOD
+#define RTC_NTP_SYNC_PERIOD                      (1L*60L*60L)
+#endif
+#endif /* RTC_SYNC_USING_NTP */
+
+/**
+ * Returns the current time.
+ *
+ * @param time_t * t the timestamp pointer, if not used, keep NULL.
  *
- * \param time_t * t the timestamp pointer, if not used, keep NULL.
- * \return time_t return timestamp current.
+ * @return time_t return timestamp current.
  *
  */
 /* for IAR 6.2 later Compiler */
@@ -70,12 +85,19 @@ time_t time(time_t *t)
     return time_now;
 }
 
-/** \brief set system date(time not modify).
+RT_WEAK clock_t clock(void)
+{
+    return rt_tick_get();
+}
+
+/**
+ * Set system date(time not modify).
  *
- * \param rt_uint32_t year  e.g: 2012.
- * \param rt_uint32_t month e.g: 12 (1~12).
- * \param rt_uint32_t day   e.g: e.g: 31.
- * \return rt_err_t if set success, return RT_EOK.
+ * @param rt_uint32_t year  e.g: 2012.
+ * @param rt_uint32_t month e.g: 12 (1~12).
+ * @param rt_uint32_t day   e.g: 31.
+ *
+ * @return rt_err_t if set success, return RT_EOK.
  *
  */
 rt_err_t set_date(rt_uint32_t year, rt_uint32_t month, rt_uint32_t day)
@@ -118,12 +140,14 @@ rt_err_t set_date(rt_uint32_t year, rt_uint32_t month, rt_uint32_t day)
     return ret;
 }
 
-/** \brief set system time(date not modify).
+/**
+ * Set system time(date not modify).
+ *
+ * @param rt_uint32_t hour   e.g: 0~23.
+ * @param rt_uint32_t minute e.g: 0~59.
+ * @param rt_uint32_t second e.g: 0~59.
  *
- * \param rt_uint32_t hour   e.g: 0~23.
- * \param rt_uint32_t minute e.g: 0~59.
- * \param rt_uint32_t second e.g: 0~59.
- * \return rt_err_t if set success, return RT_EOK.
+ * @return rt_err_t if set success, return RT_EOK.
  *
  */
 rt_err_t set_time(rt_uint32_t hour, rt_uint32_t minute, rt_uint32_t second)
@@ -166,6 +190,45 @@ rt_err_t set_time(rt_uint32_t hour, rt_uint32_t minute, rt_uint32_t second)
     return ret;
 }
 
+#ifdef RTC_SYNC_USING_NTP
+static void ntp_sync_thread_enrty(void *param)
+{
+    extern time_t ntp_sync_to_rtc(void);
+    /* first sync delay for network connect */
+    rt_thread_delay(RTC_NTP_FIRST_SYNC_DELAY * RT_TICK_PER_SECOND);
+
+    while (1)
+    {
+        ntp_sync_to_rtc();
+        rt_thread_delay(RTC_NTP_SYNC_PERIOD * RT_TICK_PER_SECOND);
+    }
+}
+
+int rt_rtc_ntp_sync_init(void)
+{
+    static rt_bool_t init_ok = RT_FALSE;
+    rt_thread_t thread;
+
+    if (init_ok)
+    {
+        return 0;
+    }
+
+    thread = rt_thread_create("ntp_sync", ntp_sync_thread_enrty, RT_NULL, 1536, 26, 2);
+    if (thread)
+    {
+        rt_thread_startup(thread);
+    }
+    else
+    {
+        return -RT_ENOMEM;
+    }
+
+    init_ok = RT_TRUE;
+}
+INIT_COMPONENT_EXPORT(rt_rtc_ntp_sync_init);
+#endif /* RTC_SYNC_USING_NTP */
+
 #ifdef RT_USING_FINSH
 #include <finsh.h>
 #include <rtdevice.h>
@@ -181,4 +244,68 @@ FINSH_FUNCTION_EXPORT(list_date, show date and time.)
 
 FINSH_FUNCTION_EXPORT(set_date, set date. e.g: set_date(2010,2,28))
 FINSH_FUNCTION_EXPORT(set_time, set time. e.g: set_time(23,59,59))
-#endif
+
+#if defined(RT_USING_FINSH)
+static void date(uint8_t argc, char **argv)
+{
+    if (argc == 1)
+    {
+        time_t now;
+        /* output current time */
+        now = time(RT_NULL);
+        rt_kprintf("%s", ctime(&now));
+    }
+    else if (argc >= 7)
+    {
+        /* set time and date */
+        uint16_t year;
+        uint8_t month, day, hour, min, sec;
+        year = atoi(argv[1]);
+        month = atoi(argv[2]);
+        day = atoi(argv[3]);
+        hour = atoi(argv[4]);
+        min = atoi(argv[5]);
+        sec = atoi(argv[6]);
+        if (year > 2099 || year < 2000)
+        {
+            rt_kprintf("year is out of range [2000-2099]\n");
+            return;
+        }
+        if (month == 0 || month > 12)
+        {
+            rt_kprintf("month is out of range [1-12]\n");
+            return;
+        }
+        if (day == 0 || day > 31)
+        {
+            rt_kprintf("day is out of range [1-31]\n");
+            return;
+        }
+        if (hour > 23)
+        {
+            rt_kprintf("hour is out of range [0-23]\n");
+            return;
+        }
+        if (min > 59)
+        {
+            rt_kprintf("minute is out of range [0-59]\n");
+            return;
+        }
+        if (sec > 59)
+        {
+            rt_kprintf("second is out of range [0-59]\n");
+            return;
+        }
+        set_time(hour, min, sec);
+        set_date(year, month, day);
+    }
+    else
+    {
+        rt_kprintf("please input: date [year month day hour min sec] or date\n");
+        rt_kprintf("e.g: date 2018 01 01 23 59 59 or date\n");
+    }
+}
+MSH_CMD_EXPORT(date, get date and time or set [year month day hour min sec]);
+#endif /* defined(RT_USING_FINSH) */
+
+#endif /* RT_USING_FINSH */

components/drivers/rtc/soft_rtc.c

@@ -0,0 +1,107 @@
+/*
+ * File      : soft_rtc.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-01-30     armink       the first version
+ */
+
+#include <time.h>
+#include <string.h>
+#include <rtthread.h>
+
+#include <drivers/rtc.h>
+
+#ifdef RT_USING_SOFT_RTC
+
+/* 2018-01-30 14:44:50 = RTC_TIME_INIT(2018, 1, 30, 14, 44, 50)  */
+#define RTC_TIME_INIT(year, month, day, hour, minute, second)        \
+    {.tm_year = year - 1900, .tm_mon = month - 1, .tm_mday = day, .tm_hour = hour, .tm_min = minute, .tm_sec = second}
+
+#ifndef SOFT_RTC_TIME_DEFAULT
+#define SOFT_RTC_TIME_DEFAULT                    RTC_TIME_INIT(2018, 1, 1, 0, 0 ,0)
+#endif
+
+static struct rt_device soft_rtc_dev;
+static rt_tick_t init_tick;
+static time_t init_time;
+
+static rt_err_t soft_rtc_control(rt_device_t dev, int cmd, void *args)
+{
+    time_t *time;
+    struct tm time_temp;
+
+    RT_ASSERT(dev != RT_NULL);
+    memset(&time_temp, 0, sizeof(struct tm));
+
+    switch (cmd)
+    {
+    case RT_DEVICE_CTRL_RTC_GET_TIME:
+        time = (time_t *) args;
+        *time = init_time + (rt_tick_get() - init_tick) / RT_TICK_PER_SECOND;
+        break;
+
+    case RT_DEVICE_CTRL_RTC_SET_TIME:
+    {
+        time = (time_t *) args;
+        init_time = *time - (rt_tick_get() - init_tick) / RT_TICK_PER_SECOND;
+        break;
+    }
+    }
+
+    return RT_EOK;
+}
+
+int rt_soft_rtc_init(void)
+{
+    static rt_bool_t init_ok = RT_FALSE;
+    struct tm time_new = SOFT_RTC_TIME_DEFAULT;
+
+    if (init_ok)
+    {
+        return 0;
+    }
+    /* make sure only one 'rtc' device */
+    RT_ASSERT(!rt_device_find("rtc"));
+
+    init_tick = rt_tick_get();
+    init_time = mktime(&time_new);
+
+    soft_rtc_dev.type    = RT_Device_Class_RTC;
+
+    /* register rtc device */
+    soft_rtc_dev.init    = RT_NULL;
+    soft_rtc_dev.open    = RT_NULL;
+    soft_rtc_dev.close   = RT_NULL;
+    soft_rtc_dev.read    = RT_NULL;
+    soft_rtc_dev.write   = RT_NULL;
+    soft_rtc_dev.control = soft_rtc_control;
+
+    /* no private */
+    soft_rtc_dev.user_data = RT_NULL;
+
+    rt_device_register(&soft_rtc_dev, "rtc", RT_DEVICE_FLAG_RDWR);
+
+    init_ok = RT_TRUE;
+
+    return 0;
+}
+INIT_DEVICE_EXPORT(rt_soft_rtc_init);
+
+#endif /* RT_USING_SOFT_RTC */