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Altera_Forum's avatar
Altera_Forum
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16 years ago

qu(at)rtus II tool issues "always enabled IO buffer "

Hi all

I have a system build with SOPC builder it works fine

and later i tried to add one more component to the SOPC design

I generated the ptf file and I am running the qu(at)rtus II tool for generating the sof file

But the qu(at)rtus II Tool issues the following error in Analysis and Synthesis Phase

Error : incoming_tristate_bridge_data[0] has multiple drivers due to always enabled IO buffers

I am unable to trace out the root of the problem please help me out

regards

M Kalyansrinivas

2 Replies

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

    Can you expand the error to see which signals are listed as driving "incoming_tristate_bridge_data[0]".

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

    Hi Jake

    I have set the exception address to sram and reset address to cfi_flash

    Error is issued on all the signals (1 to 32) of incoming_tristate_bridge (avalon)

    error :

    incoming_tristate_bridge_data[11] " has multiple drivers due to always enabled io buffer "sopc_top:s1|tristate_bridge_data[11]~119"

    incoming_tristate_bridge_data[27] " has multiple drivers due to always enabled io buffer "sopc_top:s1|tristate_bridge_data[27]~120"

    incoming_tristate_bridge_data[10] " has multiple drivers due to always enabled io buffer "sopc_top:s1|tristate_bridge_data[10]~121"

    In same manner all 32 signals of incoming_tristate_bridge_data are issued an error

    and

    also i observed that if i set the exception address to SDRAM and reset address to cfi_flash the same error is issued on SDRAM ios also saying that

    "has multiple drivers due to always enabled io buffers"

    I could'nt able to trace out the root of this error

    regards

    M Kalyan sriniavas