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RTC subsecond interrupt does not work

Question asked by Simon on Feb 8, 2016
Latest reply on Feb 9, 2016 by Simon
I have written some code to generate an interrupt from the RTC alarm. This includes sub seconds. This works well for times in excess of 1 second. The alarm time, including subseconds is calculated and displayed. When the interrupt is hit the time is read again and the difference is only a few subsecond counts. However when a short time (less than 1 second) is tried it will fail if the only thing that changes are the subseconds. Then the interrupt is not triggered. This does not seem expected behaviour, any workarounds out there?