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TMS320F28035: How to implement RTC function

Wen-Gou Lin
Prodigy 220 points
Part Number: TMS320F28035


I am using TMS320F28035 to do my project. Now, a new function is added. I need to implement a Real Time Clock (RTC).

Can RTC be implemeted by Software? Or, I should redesign my hardware to add RTC circuit. If so, any reference design?

  • 0
    TI__Mastermind 32655 points

    Hi,

    The device has CPU timer. It runs in multiple of the CPU clock. You can configure the clock period using timer registers, Will that suffice your requirement?

    Regards,

    Veena

  • 0 in reply to Veena Kamath
    Prodigy 220 points

    I need to know the real-world time to do something. Thus, the RTC has to match the real-world time. At first setup, i will set the real-world time(for example 14:00) to RTC. After that, I can get the real-world time from RTC  as I needed.

  • 0 in reply to Wen-Gou Lin
    TI__Guru* 95315 points

    You can implement it in software. However, you may want to go with a standalone RTC chip for the following reasons:

    1.  Your application needs other functions like the date/alarm
    2. Your application is power sensitive and needs to be powered down frequently
    3. Your application cannot spare a CPU-timer for the RTC function
    4. You do not want to deal with the s/w complexity of handling a RTC.