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Avnet Boards General PS-RST oddity relating to QSPI boot
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PS-RST oddity relating to QSPI boot

Former Member
Former Member over 13 years ago

I'm testing QSPI boot mode using the built-in ZedBoard QSPI Flash contents (which simply turns on every other LED as described in Appendix II of the Getting Started Guide). 

I noticed that after the initial power-on boot-up succeeds at displaying the LED pattern, if you then press the PS-RST button the pattern does not redisplay as expected.  Instead the UART outputs the text "WDT reset happened, falling back...".  There is no UART output for the intial power on. 

Is this failure to respond correctly to a PS-RST a problem relating to the chip itself, the Xilinx base software, or something particular to this demo?

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  • bhfletcher
    0 bhfletcher over 13 years ago

    This is particular to this demo.  Asserting PS-RST will also clear the PL.  You should notice that the DONE LED goes out.  The application has to be designed to handle PS-RST to reload the PL, if that is the behavior you want.

     

    Bryan

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  • bhfletcher
    0 bhfletcher over 13 years ago

    This is particular to this demo.  Asserting PS-RST will also clear the PL.  You should notice that the DONE LED goes out.  The application has to be designed to handle PS-RST to reload the PL, if that is the behavior you want.

     

    Bryan

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