添加HC32F460系列RTC外设驱动 (#6069)

* 添加HC32F460系列RTC外设驱动

Author: xiaoxiaolisunny

bsp/hc32/ev_hc32f460_lqfp100_v2/board/Kconfig

@@ -106,7 +106,6 @@ menu "On-chip Peripheral Drivers"
         bool "Enable RTC"
         select RT_USING_RTC
         default n
-
         if BSP_USING_RTC
             choice
                 prompt "Select clock source"

bsp/hc32/libraries/hc32_drivers/SConscript

@@ -29,6 +29,9 @@ if GetDepend(['RT_USING_ADC']):
 
 if GetDepend(['RT_USING_CAN']):
     src += ['drv_can.c']
+	
+if GetDepend(['RT_USING_RTC']):
+    src += ['drv_rtc.c']
 
 path = [cwd]
 

bsp/hc32/libraries/hc32_drivers/drv_rtc.c

@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ * Copyright (c) 2022, xiaoxiaolisunny
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author               Notes
+ * 2022-06-10     xiaoxiaolisunny      first version
+ */
+
+#include <board.h>
+#include <rtdbg.h>
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <sys/time.h>
+
+#ifdef BSP_USING_RTC
+
+static rt_rtc_dev_t hc32_rtc_dev;
+
+static rt_err_t hc32_rtc_get_time_stamp(struct timeval *tv)
+{
+    stc_rtc_time_t stcRtcTime = {0};
+    stc_rtc_date_t stcRtcDate = {0};
+    struct tm tm_new = {0};
+
+    RTC_GetTime(RTC_DATA_FMT_DEC, &stcRtcTime);
+    RTC_GetDate(RTC_DATA_FMT_DEC, &stcRtcDate);
+
+    tm_new.tm_sec  = stcRtcTime.u8Second;
+    tm_new.tm_min  = stcRtcTime.u8Minute;
+    tm_new.tm_hour = stcRtcTime.u8Hour;
+    if(stcRtcDate.u8Month == 0)
+    {
+        tm_new.tm_mday = stcRtcDate.u8Day + 1;
+        tm_new.tm_mon  = stcRtcDate.u8Month;
+    }
+    else
+    {
+        tm_new.tm_mday = stcRtcDate.u8Day ;
+        tm_new.tm_mon  = stcRtcDate.u8Month - 1;
+    }
+    tm_new.tm_year = stcRtcDate.u8Year + 100;
+
+    tv->tv_sec = timegm(&tm_new);
+
+    return RT_EOK;
+}
+
+static rt_err_t hc32_rtc_set_time_stamp(time_t time_stamp)
+{
+    stc_rtc_time_t stcRtcTime = {0};
+    stc_rtc_date_t stcRtcDate = {0};
+    struct tm p_tm = {0};
+
+    gmtime_r(&time_stamp, &p_tm);
+
+    if (p_tm.tm_year < 100)
+    {
+        return -RT_ERROR;
+    }
+
+    stcRtcTime.u8Second  = p_tm.tm_sec ;
+    stcRtcTime.u8Minute  = p_tm.tm_min ;
+    stcRtcTime.u8Hour    = p_tm.tm_hour;
+    stcRtcDate.u8Day     = p_tm.tm_mday;
+    stcRtcDate.u8Month   = p_tm.tm_mon + 1;
+    stcRtcDate.u8Year    = p_tm.tm_year - 100;
+    stcRtcDate.u8Weekday = p_tm.tm_wday;
+
+    if (LL_OK != RTC_SetTime(RTC_DATA_FMT_DEC, &stcRtcTime))
+    {
+        return -RT_ERROR;
+    }
+    if (LL_OK != RTC_SetDate(RTC_DATA_FMT_DEC, &stcRtcDate))
+    {
+        return -RT_ERROR;
+    }
+
+    LOG_D("set rtc time.");
+    return RT_EOK;
+}
+
+static rt_err_t hc32_rtc_init(void)
+{
+    stc_rtc_init_t stcRtcInit;
+
+#ifdef BSP_RTC_USING_XTAL32
+    stc_clock_xtal32_init_t stcXtal32Init;
+    /* Xtal32 config */
+    stcXtal32Init.u8State  = CLK_XTAL32_ON;
+    stcXtal32Init.u8Drv    = CLK_XTAL32_DRV_HIGH;
+    stcXtal32Init.u8Filter = CLK_XTAL32_FILTER_RUN_MD;
+    (void)CLK_Xtal32Init(&stcXtal32Init);
+    /* Waiting for XTAL32 stabilization */
+    rt_thread_delay(100);
+#endif
+
+    /* RTC stopped */
+    if (DISABLE == RTC_GetCounterState())
+    {
+        /* Reset RTC counter */
+        if (LL_ERR_TIMEOUT == RTC_DeInit())
+        {
+            return -RT_ERROR;
+        }
+        else
+        {
+            /* Configure structure initialization */
+            (void)RTC_StructInit(&stcRtcInit);
+            /* Configuration RTC structure */
+            #ifdef BSP_RTC_USING_XTAL32
+            stcRtcInit.u8ClockSrc = RTC_CLK_SRC_XTAL32;
+            #else
+            stcRtcInit.u8ClockSrc = RTC_CLK_SRC_LRC;
+            #endif
+            stcRtcInit.u8HourFormat  = RTC_HOUR_FMT_24H;
+            (void)RTC_Init(&stcRtcInit);
+            /* Startup RTC count */
+            RTC_Cmd(ENABLE);
+        }
+    }
+    return RT_EOK;
+}
+
+static rt_err_t hc32_rtc_get_secs(time_t *sec)
+{
+    struct timeval tv;
+
+    hc32_rtc_get_time_stamp(&tv);
+    *(time_t *) sec = tv.tv_sec;
+    LOG_D("RTC: get rtc_time %d", *sec);
+
+    return RT_EOK;
+}
+
+static rt_err_t hc32_rtc_set_secs(time_t *sec)
+{
+    rt_err_t result = RT_EOK;
+
+    if (hc32_rtc_set_time_stamp(*sec))
+    {
+        result = -RT_ERROR;
+    }
+    LOG_D("RTC: set rtc_time %d", *sec);
+
+    return result;
+}
+
+const static struct rt_rtc_ops hc32_rtc_ops =
+{
+    hc32_rtc_init,
+    hc32_rtc_get_secs,
+    hc32_rtc_set_secs,
+    RT_NULL,
+    RT_NULL,
+    hc32_rtc_get_time_stamp,
+    RT_NULL
+};
+
+int rt_hw_rtc_init(void)
+{
+    rt_err_t result;
+
+    hc32_rtc_dev.ops = &hc32_rtc_ops;
+    result = rt_hw_rtc_register(&hc32_rtc_dev, "rtc", RT_DEVICE_FLAG_RDWR, RT_NULL);
+    if (result != RT_EOK)
+    {
+        LOG_E("rtc register err code: %d", result);
+        return result;
+    }
+    LOG_D("rtc init success");
+    return RT_EOK;
+}
+INIT_DEVICE_EXPORT(rt_hw_rtc_init);
+
+#endif /* BSP_USING_RTC */