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Altera_Forum's avatar
Altera_Forum
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15 years ago

program with 8 LEDs

hi,:)

i have a problem, i want to create a program which turn on 8 LEDs on a cyclone III. I want to write on the I/O FPGA port directly. In fact, i have a problem with my clock; i got this warning:"Warning: The following clock transfers have no clock uncertainty assignment

Warning: From ext_clk (Rise) to ext_clk (Rise) (setup and hold)". Idon't want to create a sopc builder, i just want to do a simple program and realise following LED.(Chenillard)

thanks

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    That warning has nothing to do with the SOPC.

    Simply, the static timming analysis tool (TimeQuest?) is warning you have not assigned any uncertantiy to the ext_clk and, thus, analysis will assume a "perfect" clock, without jitter, skew, etc.