Intel® Quartus® Prime Software
Intel® Quartus® Prime Design Software, Design Entry, Synthesis, Simulation, Verification, Timing Analysis, System Design (Platform Designer, formerly Qsys)

dcfifo full broken

alexislms
Valued Contributor I
827 Views

 

  dcfifo  #(
    .intended_device_family    ("Agilex"),
    .lpm_numwords              (32),
    .lpm_showahead             ("ON"),
    .lpm_type                  ( "dcfifo"),
    .lpm_width                 ($bits(t_cmd_data)),
    .lpm_widthu                (6),
    .add_usedw_msb_bit         ("ON"),
    .read_aclr_synch           ("ON"),
    .write_aclr_synch          ("ON"),
    .rdsync_delaypipe          (4),
    .wrsync_delaypipe          (4)
  ) cmd_dcfifo_i (

 

alexislms_0-1717559124239.png

 

full is set 2clocks after a write
full when 29 words are in, whereas the depth is 32

 

 

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7 Replies
Kshitij_Intel
Employee
778 Views

Hi,


Are you using FIFO parameter editor or manually instantiating the FIFO IP?

Please ensure that the input and output ports used, and the parameter values assigned are valid for the FIFO Intel® FPGA IP core you instantiate for your target device.


If still not resolved, share the Quartus project QAR with the detailed steps to replicate the issue at my end.


Thank you,

Kshitij Goel


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alexislms
Valued Contributor I
774 Views
Could you forward the document that explains dcfifo? And tell what's wrong?
All the parameters seem correct. Modelsim and Quartus don't tell me anything about anything wrong.

Thank you.
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alexislms
Valued Contributor I
728 Views
Why do you give me a random fifo document that doesn't even mention the dcfifo?
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sstrell
Honored Contributor III
700 Views

This is the info for the fifo IP including using the dual clock option.  Isn't that what you asked for? https://www.intel.com/content/www/us/en/docs/programmable/683130/24-1/fifo-settings.html

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Kshitij_Intel
Employee
591 Views

Hi,


Please go through the FIFO Intel® FPGA IP User Guide


Thank you,

Kshitij Goel


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Kshitij_Intel
Employee
525 Views

Hi,


As we do not receive any response from you on the previous answer that we have provided. Please login to ‘https://supporttickets.intel.com’, view details of the desire request, and post a response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions.

 

Thank you,

Kshitij Goel


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