Connection between two inout ports

[IonHide]

Hello, I need to connect the 10 inout pins(A) to 10 inout pins (B) based on the logic of the cntrl signal (C) with respect to clock.

i-e when C = 0 , connect port A to port B &
      when C= 1 , connect port B to port A.
what is the syntax I could follow to acheive the same , while simulating It not showing the results as needed.

Regards.

[Farabi]

Hello,

Do you have the verilog code? we can try to take look at it.

regards,

Farabi

[IonHide]

always @(posedge clk) begin

 if (C) begin

  B_out = A;

  A_en = 0;

  B_en = 1;

 end else begin

  A_out = B;

  A_en = 1;

 B_en = 0;

 end

end

assign A = A_en ? A_out : 10'bz;

assign B = B_en ? B_out : 10'bz;

where A, B are inout ports , C input signal& others are local registers.

Regards.

[FvM]

Hi,
doesn't look bad. Don't know which problem you experience. First output after direction signal change will be invalid due to registered x_en signal. E.g. C 1->0, A_ out latches old B output, then deactivate B and enables A. Unregistered x_en may achieve intended behaviour.

If you don't get reasonable output at all, it's probably due to testbench design fault.

[NazrulNaim_Intel]

Hello,

Sorry for the delay. Regarding your issue, have you tried this coding before?

// Declare registers for A, B, and control signals

reg [9:0] A_out, B_out;

reg A_en, B_en;

reg [9:0] A, B;

always @(posedge clk) begin

  if (C) begin

    // When C is high, transfer A to B

    B_out <= A; // Use non-blocking assignment

    A_en <= 0;

    B_en <= 1;

  end else begin

    // When C is low, transfer B to A

    A_out <= B; // Use non-blocking assignment

    A_en <= 1;

    B_en <= 0;

  end

end

// Drive A and B based on enable signals

always @* begin

  if (A_en) begin

    A = A_out;

  end else begin

    A = 10'bz; // High impedance when not enabled

  end

  if (B_en) begin

    B = B_out;

  end else begin

    B = 10'bz; // High impedance when not enabled

  end

end

Hope that helps and do let me know if I can assist you further.

Best regards,

Nazrul Naim

[NazrulNaim_Intel]

Hello,

As we do not receive any response from you on the previous question/reply/answer that we have provided. Please login to ‘https://supporttickets.intel.com’, view details of the desire request, and post a feed/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.

Best regards,

Nazrul Naim