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Altera_Forum's avatar
Altera_Forum
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20 years ago

help:sdram

when i start fitter my project ,there are some warnings like that:

Warning: Can't pack node nios32:inst|sdram:the_sdram|m_addr[7] to I/O pin

Warning: Can't pack logic cell nios32:inst|sdram:the_sdram|m_addr[7] and I/O node addr[7] -- logic cell cannot be packed as I/O register

Warning: Can't pack logic cell nios32:inst|sdram:the_sdram|m_addr[7] and I/O node nios32:inst|sdram:the_sdram|m_addr[7] -- logic cell cannot be packed as I/O register

Warning: Can't pack logic cell nios32:inst|sdram:the_sdram|m_addr[7] and I/O node nios32:inst|sdram:the_sdram|i~27492 -- logic cell cannot be packed as I/O register

what's the problem?why?please help me!!

2 Replies

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

    I/O "pin" is not implemented inside of FPGA, you should seperate them to inport and outport and add a "I/o" port at the actural pins of FPGA.

    Note: Nios is originally inside of FPGA. It is said " Nios Inside"!!
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    how can i add a "I/o" port at the actural pins of FPGA?when a nios system generated, the address pin of sdram generated automaticly,and i put the type of out pin to connect to the address,and assign the fpga's pin .what's your mean?thanks!