diff options
| author | wuyangyong <[email protected]> | 2012-06-14 13:17:50 +0000 |
|---|---|---|
| committer | wuyangyong <[email protected]> | 2012-06-14 13:17:50 +0000 |
| commit | 7582459691aa6c12e2e250fac339d5051474932a (patch) | |
| tree | bf6adda2729ed52a04107ecb37f059c2cd5f409c /components/drivers | |
| parent | 9e3c72a6351388c3cc332753e42f8f95aaa9785d (diff) | |
add RTC public function.
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2164 bbd45198-f89e-11dd-88c7-29a3b14d5316
Diffstat (limited to 'components/drivers')
| -rw-r--r-- | components/drivers/rtc/SConscript | 8 | ||||
| -rw-r--r-- | components/drivers/rtc/rtc.c | 163 |
2 files changed, 171 insertions, 0 deletions
diff --git a/components/drivers/rtc/SConscript b/components/drivers/rtc/SConscript new file mode 100644 index 0000000000..b2d50de758 --- /dev/null +++ b/components/drivers/rtc/SConscript @@ -0,0 +1,8 @@ +from building import *
+
+cwd = GetCurrentDir()
+src = Glob('*.c')
+CPPPATH = [cwd + '/../include']
+group = DefineGroup('DeviceDrivers', src, depend = ['RT_USING_RTC'], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/components/drivers/rtc/rtc.c b/components/drivers/rtc/rtc.c new file mode 100644 index 0000000000..df5e635453 --- /dev/null +++ b/components/drivers/rtc/rtc.c @@ -0,0 +1,163 @@ +/*
+ * File : rtc.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date Author Notes
+ * 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.
+ */
+
+#include <time.h>
+#include <string.h>
+#include <rtthread.h>
+
+/** \brief returns the current time.
+ *
+ * \param time_t * t the timestamp pointer, if not used, keep NULL.
+ * \return time_t return timestamp current.
+ *
+ */
+/* for IAR 6.2 later Compiler */
+#if defined (__IAR_SYSTEMS_ICC__) && (__VER__) >= 6020000
+#pragma module_name = "?time"
+time_t (__time32)(time_t *t) /* Only supports 32-bit timestamp */
+#else
+time_t time(time_t* t)
+#endif
+{
+ static rt_device_t device = RT_NULL;
+ time_t time_now = 0;
+
+ /* optimization: find rtc device only first. */
+ if (device == RT_NULL)
+ {
+ device = rt_device_find("rtc");
+ }
+
+ /* read timestamp from RTC device. */
+ if (device != RT_NULL)
+ {
+ rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time_now);
+ }
+
+ /* if t is not NULL, write timestamp to *t */
+ if (t != RT_NULL)
+ {
+ *t = time_now;
+ }
+
+ return time_now;
+}
+
+/** \brief 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.
+ *
+ */
+rt_err_t set_date(rt_uint32_t year, rt_uint32_t month, rt_uint32_t day)
+{
+ time_t now;
+ struct tm * p_tm;
+ struct tm tm_new;
+ rt_device_t device;
+
+ /* get current time */
+ now = time(RT_NULL);
+
+ /* lock scheduler. */
+ rt_enter_critical();
+ /* converts calendar time time into local time. */
+ p_tm = localtime(&now);
+ /* copy the statically located variable */
+ memcpy(&tm_new, p_tm, sizeof(struct tm));
+ /* unlock scheduler. */
+ rt_exit_critical();
+
+ /* update date. */
+ tm_new.tm_year = year - 1900;
+ tm_new.tm_mon = month - 1; /* tm_mon: 0~11 */
+ tm_new.tm_mday = day;
+
+ /* converts the local time in time to calendar time. */
+ now = mktime(&tm_new);
+
+ device = rt_device_find("rtc");
+ if (device == RT_NULL)
+ {
+ return -RT_ERROR;
+ }
+
+ /* update to RTC device. */
+ return rt_device_control(device, RT_DEVICE_CTRL_RTC_SET_TIME, &now);
+}
+
+/** \brief 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.
+ * \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)
+{
+ time_t now;
+ struct tm * p_tm;
+ struct tm tm_new;
+ rt_device_t device;
+
+ /* get current time */
+ now = time(RT_NULL);
+
+ /* lock scheduler. */
+ rt_enter_critical();
+ /* converts calendar time time into local time. */
+ p_tm = localtime(&now);
+ /* copy the statically located variable */
+ memcpy(&tm_new, p_tm, sizeof(struct tm));
+ /* unlock scheduler. */
+ rt_exit_critical();
+
+ /* update time. */
+ tm_new.tm_hour = hour;
+ tm_new.tm_min = minute;
+ tm_new.tm_sec = second;
+
+ /* converts the local time in time to calendar time. */
+ now = mktime(&tm_new);
+
+ device = rt_device_find("rtc");
+ if (device == RT_NULL)
+ {
+ return RT_ERROR;
+ }
+
+ /* update to RTC device. */
+ return rt_device_control(device, RT_DEVICE_CTRL_RTC_SET_TIME, &now);
+}
+
+#ifdef RT_USING_FINSH
+#include <finsh.h>
+
+void list_date(void)
+{
+ time_t now;
+
+ now = time(RT_NULL);
+ rt_kprintf("%s\n", ctime(&now));
+}
+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
|