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#include "time.h"
#include "stm32f0xx_conf.h"
/* Uncomment the corresponding line to select the RTC Clock source */
#define RTC_CLOCK_SOURCE_LSE /* LSE used as RTC source clock */
//#define RTC_CLOCK_SOURCE_LSI // LSI used as RTC source clock. The RTC Clock
// may varies due to LSI frequency dispersion
#define BKP_VALUE 0x32F0
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
__IO uint32_t AsynchPrediv = 0, SynchPrediv = 0;
/* Private function prototypes -----------------------------------------------*/
static void RTC_Config(void);
static void RTC_TimeRegulate(void);
// - êàëèáðîâêó RTC êàê äåëàòü?
// ----------------------------------------------------------------------------
//
// ----------------------------------------------------------------------------
void TimeInit (void)
{
RTC_InitTypeDef RTC_InitStructure;
if (RTC_ReadBackupRegister(RTC_BKP_DR0) != BKP_VALUE)
//if (SynchPrediv == 0)
{
/* RTC configuration */
RTC_Config();
/* Configure the RTC data register and RTC prescaler */
RTC_InitStructure.RTC_AsynchPrediv = AsynchPrediv;
RTC_InitStructure.RTC_SynchPrediv = SynchPrediv;
RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
/* Check on RTC init */
if (RTC_Init(&RTC_InitStructure) == ERROR)
{
// printf("\n\r /!\\***** RTC Prescaler Config failed ********/!\\ \n\r");
}
/* Configure the time register */
RTC_TimeRegulate();
}
else
{
/* Check if the Power On Reset flag is set */
if (RCC_GetFlagStatus(RCC_FLAG_PORRST) != RESET)
{
//printf("\r\n Power On Reset occurred....\n\r");
}
/* Check if the Pin Reset flag is set */
else if (RCC_GetFlagStatus(RCC_FLAG_PINRST) != RESET)
{
// printf("\r\n External Reset occurred....\n\r");
}
//printf("\n\r No need to configure RTC....\n\r");
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to RTC */
PWR_BackupAccessCmd(ENABLE);
#ifdef RTC_CLOCK_SOURCE_LSI
/* Enable the LSI OSC */
RCC_LSICmd(ENABLE);
#endif /* RTC_CLOCK_SOURCE_LSI */
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
/* Clear the RTC Alarm Flag */
RTC_ClearFlag(RTC_FLAG_ALRAF);
/* Clear the EXTI Line 17 Pending bit (Connected internally to RTC Alarm) */
//EXTI_ClearITPendingBit(EXTI_Line17);
/* Display the RTC Time and Alarm */
//RTC_TimeShow();
//RTC_AlarmShow();
}
}
// ----------------------------------------------------------------------------
//
// ----------------------------------------------------------------------------
static void RTC_Config(void)
{
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to RTC */
PWR_BackupAccessCmd(ENABLE);
#if defined (RTC_CLOCK_SOURCE_LSI) /* LSI used as RTC source clock*/
/* The RTC Clock may varies due to LSI frequency dispersion. */
/* Enable the LSI OSC */
RCC_LSICmd(ENABLE);
/* Wait till LSI is ready */
while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
{
}
/* Select the RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
SynchPrediv = 0x18F;
AsynchPrediv = 0x63;
#elif defined (RTC_CLOCK_SOURCE_LSE) /* LSE used as RTC source clock */
/* Enable the LSE OSC */
RCC_LSEConfig(RCC_LSE_ON);
/* Wait till LSE is ready */
while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{
}
/* Select the RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
SynchPrediv = 0xFF;
AsynchPrediv = 0x7F;
#else
#error Please select the RTC Clock source inside the main.c file
#endif /* RTC_CLOCK_SOURCE_LSI */
/* Enable the RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
}
// ----------------------------------------------------------------------------
//
// ----------------------------------------------------------------------------
static void RTC_TimeRegulate ( void )
{
RTC_TimeTypeDef RTC_TimeStructure;
RTC_TimeStructure.RTC_Hours = 14;
RTC_TimeStructure.RTC_Minutes = 01;
RTC_TimeStructure.RTC_Seconds = 00;
RTC_SetTime(RTC_Format_BIN, &RTC_TimeStructure);
/* Indicator for the RTC configuration */
RTC_WriteBackupRegister(RTC_BKP_DR0, BKP_VALUE);
}
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