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Altera_Forum's avatar
Altera_Forum
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14 years ago

how to change an inner signal from A pin to B pin?

for example,i had assigned signal_s to A pin. after fitting ,i found this signal_s should connect to B pin. so ,i have to edit the layout of design ,to change signal_s from all elements it have connected to B pin.

first,how to remove the connection between signal_s and A pin ? then how to connect signal_s and B pin? this eco entry is chipeditor,isn't is? but the manual give no hints about it.

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    you should be able to change this in the Pin Planner. Alternatively you can look for the pin assignement in the Assignment Editor and change it there.

  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    Well I generally dont use GUI to do pin assignments.

    Its your call how to do that.

    Generally watever pin assignments you do will be written in your project.qsf file something like

    set_location_assignment PIN_B32 -to portA

    To remove this assignment delete this statement from the qsf file and it will be done.

    To assign portA to some other pin jus write the pin number as PIN_xxxx watever you wana.

    i have limited knowledge in case of GUI.

    Good luck.
  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    thanks for your reply. you mean a signal in a placed and routed design , to be connected to another pin,without any change to other P&R logic , without a new synthesis and a new fitting, this can be realized just to do a new pin assignment in script?

  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    Wel no..you will have to P&R again..even a small change in ur qsf will ask of a recompile...offcourse if u wana do timing analysis then its mandatory that after a change to your setup you have to do mapping and fitting all over again..you have made a change and in order that your design accepts it a recompile is neccessary..