Posted on May 17, 2011 at 14:21I start from your last question: RTC_LSB_Mask is defined into stm32f10x_rtc.c stm stlib file:
#define RTC_LSB_Mask ((uint32_t)0x0000FFFF) /*!< RTC LSB Mask */
void RTC_SetCounter(uint32_t CounterValue)
Back to the problem:
the RTC is set to 1 second tick: (attached the whole rtc.c file) as you can see below.
I realized this (interesting to me): if in my RTCAlarm_IRQHandler(void) i have (as I do now):
RTC_WaitForSynchro();
SoftRtc_SetAlarm(SoftRtc_Get());
then I have alarm every 1 second. If I remove the RTC_WaitForSynchro(); then I need to change the following to
SoftRtc_SetAlarm(SoftRtc_Get()+1);
My question is: do I need to issue RTC_WaitForSynchro() every time I quit the stop mode or can I remove from everywhere (exceptint the first configuration)?
Thanks and best regards,
Manfredo
void RTC_Configuration(void)
{
/* Enable PWR and BKP clocks */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
/* Reset Backup Domain */
//BKP_DeInit();
/* Enable LSE */
RCC_LSEConfig(RCC_LSE_ON);
/* Wait till LSE is ready */
while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{
}
/* Select LSE as RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
// save rtc counter
// MainSeconds = SoftRtc_Get();
/* Enable RTC Clock */
RCC_RTCCLKCmd(ENABLE);
// restore rtc counter
// SoftRtc_Set(MainSeconds);
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Set RTC prescaler: set RTC period to 1sec */
RTC_SetPrescaler(32767); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
}
