Forum Discussion
New ContributorConnection between two inout ports
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.
5 Replies
Farabi_AlteraRegular Contributor
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.
FvMSuper Contributor
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_IntelHello,
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
