rtc.c

[詳解]

/** @file
    @brief      STM32 RTC

    @date       2015.08.12
    @author     Takashi SHUDO
*/

#include "device.h"
#include "device/rtc_ioctl.h"
#include "datetime.h"
#include "tkprintf.h"
#include "system.h"

#include "stm32f7xx_hal.h"

//#define DEBUGKBITS 0x03
#include "dkprintf.h"


RTC_HandleTypeDef hrtc;

/* RTC init function */
void MX_RTC_Init(void)
{
#if 0
        RTC_TimeTypeDef sTime;
        RTC_DateTypeDef sDate;
        RTC_AlarmTypeDef sAlarm;
#endif
        RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;

        PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
        PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
        HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
  
        /**Initialize RTC and set the Time and Date 
         */
        hrtc.Instance = RTC;
        hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
        hrtc.Init.AsynchPrediv = 127;
        hrtc.Init.SynchPrediv = 255;
        hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
        hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
        hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
        HAL_RTC_Init(&hrtc);

#if 0
        sTime.Hours = 0;
        sTime.Minutes = 0;
        sTime.Seconds = 0;
        sTime.SubSeconds = 0;
        sTime.TimeFormat = RTC_HOURFORMAT12_AM;
        sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
        sTime.StoreOperation = RTC_STOREOPERATION_RESET;
        HAL_RTC_SetTime(&hrtc, &sTime, FORMAT_BCD);

        sDate.WeekDay = RTC_WEEKDAY_MONDAY;
        sDate.Month = RTC_MONTH_JANUARY;
        sDate.Date = 1;
        sDate.Year = 0;
        HAL_RTC_SetDate(&hrtc, &sDate, FORMAT_BCD);

        /**Enable the Alarm A 
         */
        sAlarm.AlarmTime.Hours = 0;
        sAlarm.AlarmTime.Minutes = 0;
        sAlarm.AlarmTime.Seconds = 0;
        sAlarm.AlarmTime.SubSeconds = 0;
        sAlarm.AlarmTime.TimeFormat = RTC_HOURFORMAT12_AM;
        sAlarm.AlarmTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
        sAlarm.AlarmTime.StoreOperation = RTC_STOREOPERATION_RESET;
        sAlarm.AlarmMask = RTC_ALARMMASK_NONE;
        sAlarm.AlarmSubSecondMask = RTC_ALARMSUBSECONDMASK_ALL;
        sAlarm.AlarmDateWeekDaySel = RTC_ALARMDATEWEEKDAYSEL_DATE;
        sAlarm.AlarmDateWeekDay = 1;
        sAlarm.Alarm = RTC_ALARM_A;
        HAL_RTC_SetAlarm(&hrtc, &sAlarm, FORMAT_BCD);

        /**Enable the Alarm B 
         */
        sAlarm.Alarm = RTC_ALARM_B;
        HAL_RTC_SetAlarm(&hrtc, &sAlarm, FORMAT_BCD);

        /**Enable the WakeUp 
         */
        HAL_RTCEx_SetWakeUpTimer(&hrtc, 0, RTC_WAKEUPCLOCK_RTCCLK_DIV16);
#endif
}

void HAL_RTC_MspInit(RTC_HandleTypeDef* hrtc)
{
        if(hrtc->Instance==RTC) {
                __HAL_RCC_RTC_ENABLE();
        }
}

void HAL_RTC_AlarmAEventCallback(RTC_HandleTypeDef *hrtc)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_RTC_AlarmAEventCallback could be implemented in the user file
   */
}

void HAL_RTCEx_AlarmBEventCallback(RTC_HandleTypeDef *hrtc)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_RTCEx_AlarmBEventCallback could be implemented in the user file
   */
}

static int rtc_register(struct st_device *dev, char *param)
{
        MX_RTC_Init();

        return 0;
}


static int rtc_ioctl(struct st_device *dev, unsigned int com, unsigned int arg, void *param)
{
        struct st_datetime *tp = (struct st_datetime *)param;

        switch(com) {
        case IOCMD_RTC_SET:
                {
                        RTC_DateTypeDef sDate;
                        RTC_TimeTypeDef sTime;

                        sDate.Year = tp->year - 2000;
                        sDate.Month = tp->month;
                        sDate.Date = tp->day;
                        sDate.WeekDay = tp->dayofweek;

                        sTime.TimeFormat = RTC_HOURFORMAT12_AM;
                        sTime.Hours = tp->hour;
                        sTime.Minutes = tp->min;
                        sTime.Seconds = tp->sec;
                        sTime.SubSeconds = 256 - ((tp->msec * 256) / 1000);
                        sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
                        sTime.StoreOperation = RTC_STOREOPERATION_RESET;

                        HAL_RTC_SetDate(&hrtc, &sDate, FORMAT_BIN);
                        HAL_RTC_SetTime(&hrtc, &sTime, FORMAT_BIN);

                        return 0;
                }
                break;

        case IOCMD_RTC_GET:
                {
                        RTC_TimeTypeDef gTime;
                        RTC_DateTypeDef gDate;

                        HAL_RTC_GetTime(&hrtc, &gTime, FORMAT_BIN);
                        HAL_RTC_GetDate(&hrtc, &gDate, FORMAT_BIN);

                        DKPRINTF(0x01, "%04d-%02d-%02d ",
                                 2000 + gDate.Year, gDate.Month, gDate.Date);
                        DKPRINTF(0x01, "%02d:%02d:%02d\n",
                                 gTime.Hours, gTime.Minutes, gTime.Seconds);

                        tp->year = gDate.Year + 2000;
                        tp->month = gDate.Month;
                        tp->day = gDate.Date;
                        tp->dayofweek = gDate.WeekDay;

                        if(gTime.TimeFormat == RTC_HOURFORMAT12_AM) {
                                tp->hour = gTime.Hours;
                        } else {
                                tp->hour = gTime.Hours + 12;
                        }
                        tp->min = gTime.Minutes;
                        tp->sec = gTime.Seconds;
                        tp->msec = ((256 - gTime.SubSeconds) * 1000) / 256;

                        return 0;
                }
                break;

        default:
                SYSERR_PRINT("Unknown ioctl(%08lX)\n", com);
                break;
        }

        return -1;
}

const struct st_device rtc_device = {
        .name           = DEF_DEV_NAME_RTC,
        .explan         = "STM32F7 RTC",
        .register_dev   = rtc_register,
        .ioctl          = rtc_ioctl,
};