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ZedBoard real-time clock

Former Member

Hi folks,

Today when using my two zedboards (one using QNX and the other one using VxWorks), I realized that after each reboot the clock is reset to 0, back to the epoch. In QNX, I get this:

# date
Thu Jan 01 00:21:29 GMT 1970

And if I try to set anything on the hardware clock, I get this:

# rtc hw
No real time clock hardware available

Is there anyway to get/set the current time so that it gives you that after each reboot?

Thanks!

  • 0

    Hi temax,

    In order to keep the BOM cost of ZedBoard low, some features (like the RTC found on ZC702 board) were not added to the board design.

    However, ZedBoard was designed with flexibility in prototyping in mind so I would recommend looking at a low-cost Pmod RTC to prototype a real time hardware clock onto your system.

    If you do this, then you should be able to sync your system clock on the processor with the time reported by the RTC (at boot time or periodically as needed).

    Take a look at this thread where these community members are using a Pmod RTC for this very purpose on MicroZed:

    http://microzed.org/content/problem-linaro-and-i2c-devices

    Regards,

    -Kevin