Can not make two alarms work in STM32F429i_Disco

[Linda]

Posted on March 05, 2015 at 14:52

Dear Sir/Miss,

I need 2 alarms, I only can get one alarm work thought Canlandar module, but if make code for alarm A and B, none of them works. Here is my code: ********** RTC_TimeTypeDef   RTC_TimeStructure; RTC_AlarmTypeDef  RTC_AlarmStructure; RTC_GetTime(RTC_Format_BIN, &RTC_TimeStructure); sec    =  RTC_TimeStructure.RTC_Seconds; min    =  RTC_TimeStructure.RTC_Minutes; hour   =  RTC_TimeStructure.RTC_Hours;                  Alarm_Init();             /*  Alarm A */             RTC_GetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);             RTC_AlarmCmd(RTC_Alarm_A, DISABLE);             /* Disable the RTC Alarm A Interrupt */             RTC_ITConfig(RTC_IT_ALRA, DISABLE);             RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds = (sec+0X01);             RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes = (min+0X01);             RTC_AlarmStructure.RTC_AlarmTime.RTC_Hours = (hour+0X00);             RTC_AlarmStructure.RTC_AlarmDateWeekDaySel = RTC_AlarmDateWeekDaySel_Date;             RTC_AlarmStructure.RTC_AlarmDateWeekDay = day;             RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);             /* Enable the RTC Alarm A Interrupt */             RTC_ITConfig(RTC_IT_ALRA, ENABLE);             /* Enable the alarm  A */             RTC_AlarmCmd(RTC_Alarm_A, ENABLE);             /*  Alarm B */             RTC_GetAlarm(RTC_Format_BIN, RTC_Alarm_B, &RTC_AlarmStructure);             RTC_AlarmCmd(RTC_Alarm_B, DISABLE);             /* Disable the RTC Alarm B Interrupt */             RTC_ITConfig(RTC_IT_ALRB, DISABLE);             RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds = (sec+0X01);             RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes = (min+0X00);             RTC_AlarmStructure.RTC_AlarmTime.RTC_Hours = (hour+0X00);             RTC_AlarmStructure.RTC_AlarmDateWeekDaySel =    RTC_AlarmDateWeekDaySel_Date;             RTC_AlarmStructure.RTC_AlarmDateWeekDay = day;             RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_B, &RTC_AlarmStructure);             /* Enable the RTC Alarm B Interrupt */             RTC_ITConfig(RTC_IT_ALRB, ENABLE);             /* Enable the alarm  B */             RTC_AlarmCmd(RTC_Alarm_B, ENABLE); ***************** void RTC_Alarm_IRQHandler(void) {   /* Clear the EXTIL line 17 */   EXTI_ClearITPendingBit(EXTI_Line17);   /* Check on the AlarmA falg and on the number of interrupts per Second (60*8) */   if (RTC_GetITStatus(RTC_IT_ALRA) != RESET)   { //    STM_EVAL_LEDOn(LED4);     alarm_now2 = 0;     /* Clear RTC AlarmA Flags */     RTC_ClearITPendingBit(RTC_IT_ALRA);     RTC_HandlerFlag = ENABLE;   }     if (RTC_GetITStatus(RTC_IT_ALRB) != RESET)   { //    STM_EVAL_LEDOn(LED4);      alarm_now = 0;     /* Clear RTC AlarmA Flags */     RTC_ClearITPendingBit(RTC_IT_ALRB);     RTC_HandlerFlag = ENABLE;   } } ~~~~~~~~~~~~~~~~~~~~~~ Please help Thanks

[Tesla DeLorean]

Posted on March 05, 2015 at 19:06

Would suggest you advance it more than a second, and also roll the seconds/minutes/hours properly.

[Linda]

Posted on March 05, 2015 at 22:15

I change  

~~~~~~~~~~~~          RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds = (sec+0X01); RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes = (min+0X00); to:             RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds = (sec+0X01);             RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes = (min+0X02); ~~~~~~~~~~~~~~~~~~~~~ Still both of alarm A and Alarm B do not work.

[tm3341]

Posted on March 05, 2015 at 23:02

Check on link below, maybe it will be helpful to you.

http://stm32f4-discovery.com/2014/07/library-19-use-internal-rtc-on-stm32f4xx-devices/

[Tesla DeLorean]

Posted on March 05, 2015 at 23:11

Please try to make a complete, free standing example.

In your system review the peripheral/register states to understand what might be going on.

[Tesla DeLorean]

Posted on March 06, 2015 at 05:36

I have this and it works for me..

/**************************************************************************/
void AlarmTest(void)
{
RTC_TimeTypeDef RTC_TimeStructure;
RTC_AlarmTypeDef RTC_AlarmStructure;
int sec, min, hour;
int secA, minA, hourA;
int secB, minB, hourB;
AlarmInit(); // Initialize NVIC and EXTI
/* Wait for RTC APB registers synchronisation - Defensive in case your code's broken */
RTC_WaitForSynchro();
/* Get Current Time */
RTC_GetTime(RTC_Format_BIN, &RTC_TimeStructure);
printf(''Current %02d:%02d:%02d
'',
RTC_TimeStructure.RTC_Hours,
RTC_TimeStructure.RTC_Minutes,
RTC_TimeStructure.RTC_Seconds);
sec = RTC_TimeStructure.RTC_Seconds;
min = RTC_TimeStructure.RTC_Minutes;
hour = RTC_TimeStructure.RTC_Hours;
/* ALARM A */
secA = sec + 1; // At +00:01:01
minA = min + 1;
hourA = hour;
if (secA >= 60) // Rollover
{
secA -= 60;
minA++;
}
if (minA >= 60)
{
minA -= 60;
hourA++;
}
if (hourA >= 24)
{
hourA -= 24;
}
printf(''Alarm A %02d:%02d:%02d
'', hourA, minA, secA);
/* Get Current Alarm A */
RTC_GetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);
/* Disable the Alarm A */
RTC_AlarmCmd(RTC_Alarm_A, DISABLE);
/* Disable the RTC Alarm A Interrupt */
RTC_ITConfig(RTC_IT_ALRA, DISABLE);
RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds = secA;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes = minA;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Hours = hourA;
RTC_AlarmStructure.RTC_AlarmDateWeekDay = 31; // Ignored
RTC_AlarmStructure.RTC_AlarmDateWeekDaySel = RTC_AlarmDateWeekDaySel_Date;
RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_DateWeekDay;
RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);
/* Enable the RTC Alarm A Interrupt */
RTC_ITConfig(RTC_IT_ALRA, ENABLE);
/* Enable the alarm A */
RTC_AlarmCmd(RTC_Alarm_A, ENABLE);
RTC_ClearFlag(RTC_FLAG_ALRAF);
/* ALARM B */
secB = sec + 1; // At +00:02:01
minB = min + 2;
hourB = hour;
if (secB >= 60) // Rollover
{
secB -= 60;
minB++;
}
if (minB >= 60)
{
minB -= 60;
hourB++;
}
if (hourB >= 24)
{
hourB -= 24;
}
printf(''Alarm B %02d:%02d:%02d
'', hourB, minB, secB);
/* Get Current Alarm B */
RTC_GetAlarm(RTC_Format_BIN, RTC_Alarm_B, &RTC_AlarmStructure);
/* Disable the Alarm B */
RTC_AlarmCmd(RTC_Alarm_B, DISABLE);
/* Disable the RTC Alarm B Interrupt */
RTC_ITConfig(RTC_IT_ALRB, DISABLE);
RTC_AlarmStructure.RTC_AlarmTime.RTC_H12 = RTC_H12_AM;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds = secB;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes = minB;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Hours = hourB;
RTC_AlarmStructure.RTC_AlarmDateWeekDay = 31; // Ignored
RTC_AlarmStructure.RTC_AlarmDateWeekDaySel = RTC_AlarmDateWeekDaySel_Date;
RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_DateWeekDay;
RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_B, &RTC_AlarmStructure);
/* Enable the RTC Alarm B Interrupt */
RTC_ITConfig(RTC_IT_ALRB, ENABLE);
/* Enable the Alarm B */
RTC_AlarmCmd(RTC_Alarm_B, ENABLE);
RTC_ClearFlag(RTC_FLAG_ALRBF);
}
/**************************************************************************/
void RTC_Alarm_IRQHandler(void)
{
/* Check on the AlarmA flag */
if (RTC_GetITStatus(RTC_IT_ALRA) != RESET)
{
/* Clear RTC AlarmA Flags */
RTC_ClearITPendingBit(RTC_IT_ALRA);
/* Clear the EXTI line 17 */
EXTI_ClearITPendingBit(EXTI_Line17);
puts(''AlarmA Hit'');
}
/* Check on the AlarmB flag */
if (RTC_GetITStatus(RTC_IT_ALRB) != RESET)
{
/* Clear RTC AlarmB Flags */
RTC_ClearITPendingBit(RTC_IT_ALRB);
/* Clear the EXTI line 17 */
EXTI_ClearITPendingBit(EXTI_Line17);
puts(''AlarmB Hit'');
}
}
/**************************************************************************/