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MicroZed Hardware Design Clock Generation
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Related

Clock Generation

Former Member
Former Member over 11 years ago

Hello,

With the MicroZed board I pretend to develop some logic, to implement on PL side of Zynq7 020, and I just want to use the PS to generate the clock to PL within the FPGA.
With the ISE 14.5, I instantiated the Processor System and opened it.
With XPS, I defined a clock of 50MHz on FCLK_CLK0, with IO PLL source, and defined it as an external port.
I closed the XPS and on ISE I generated the Top Level of the Processing System.
In the FPGA top level, I connected all u201CProcessing System Top Levelu201D ports to FPGA ports and the clk (FCLK_CLK0) output to my logic (within PL) and also connected the FCLK_CLK0 to a FPGA output.
I generated the bitstream and downloaded the .bit file into the FPGA with success.
After these steps I verified that I do not have a clocking signal at FPGA output. The signal is stuck at High.

Are there some missing steps in my design flow?

Thanks,

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  • Former Member
    0 Former Member over 11 years ago

    The clocks, and other signals, generated in the PS do not actually start until you initialize and start up the PS. In the SDK that is done (automatically if you run an application) by the SDK executing the ps7_init.tcl script that is transferred in the 'Export to SDK' step.

     

    If you generate an FSBL and a bootable image with the SDK tools it will add the code to initialize the PS on boot up.

     

    -Gary

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  • Former Member
    0 Former Member over 11 years ago in reply to Former Member

    It works.

    Thank you

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