Software change to allow setting real time clock - easy, and needs to be done anyway?
Software change to enable the RTC feature of the STM32 - easy enough
Addition of 32.768kHz crystal - NOT going to be easy to retrofit to existing QMX boards
Addition of coin cell battery wired to the VBAT pin - NOT easy either because the existing?VBAT pin connection has to be re-routed... and where would the coin cell fit inside the QMX??
On Thu, Jan 25, 2024 at 10:04?AM <sp9paz@...> wrote:
Hello OGs, YLs, Question, actually it could be a feature request.. The stm32 chip has an internal real time clock. Wouldn't it be nice to make usable? Currently the clock may be shown on the display ant it starts counting - starting from zero on power-on. Two things would be needed: ?- software - a settigs menu where the user would be able to set current time without a need of playing with gps ?- hardware... the diagram shows that cpu's vbat leg is connected right to the gnd... adding small battery there would be required to persist the time on power off. And since stm32's rtc draws some microAmps, some small button battery should suffice. What do you think?
