When the RTC is configured in BINARY only mode, only the Subsecond register is used
The getTime is a getSubSeconds with subSeconds parameter as a 32bit number of millliseconds
The setAlarm is a setAlarmSubSeconds with subSeconds parameter as a 32bit number of millliseconds
The getDate returns 0
The setTime has no effect execpt resetting the subseconds counter.
The setDate has no effect .
When the RTC is configured in BINARY only mode, only the Subsecond register is used The getTime is a getSubSeconds with subSeconds parameter as a 32bit number of millliseconds The setAlarm is a setAlarmSubSeconds with subSeconds parameter as a 32bit number of millliseconds The getDate returns 0 The setTime has no effect execpt resetting the subseconds counter. The setDate has no effect .
based on https://github.com/stm32duino/STM32RTC/pull/93