Tracking time is often important in applications. For this reason, the STM32 platform provides a built-in real-time clock (RTC) peripheral. The datasheets for the RTC appear almost trivial to use, but there are wrinkles waiting for the unwary.
This chapter will examine how to set up interrupt service routines (ISR) for a recurring one-second interrupt event as well as the optional alarm feature. Armed with this information, there is no reason for your MCU applications to lack time information.
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