On board 2 bit input - On board 2 bit input Hello, I have the MAX 10 DE-LITE board and im trying to create for example a simple mux on a hardware level so i can run it on the board. So after creating a GOLDEN TOP sv file my problem is how can i call my module with the correct on pin boards? This is my module module Task2 ( input clk50, input logic sel [1:0], output logic y); logic clk05s,clk1s,clk2s,clk5s; logic maxCnt05s = 12500000; logic maxCnt1s = 25000000; logic maxCnt2s = 50000000; logic maxCnt5s = 125000000; longint cnt05s,cnt1s,cnt2s,cnt5s; initial begin cnt05s = 0; cnt1s = 0; cnt2s = 0; cnt5s = 0; clk05s <= 1'b0; clk1s <= 1'b0; clk2s <= 1'b0; clk5s <= 1'b0; end always@(clk05s or clk1s or clk2s or clk5s or sel) case (sel) 2'b00 : y = clk05s; 2'b01 : y = clk1s; 2'b10 : y = clk2s; 2'b11 : y = clk5s; endcase always@(posedge clk50) if (cnt05s < maxCnt05s) cnt05s++; else begin cnt05s=0; clk05s<=!clk05s; end always@(posedge clk50) if (cnt1s < maxCnt1s) cnt1s++; else begin cnt1s=0; clk1s<=!clk1s; end always@(posedge clk50) if (cnt2s < maxCnt2s) cnt2s++; else begin cnt2s=0; clk2s<=!clk2s; end always@(posedge clk50) if (cnt5s < maxCnt5s) cnt5s++; else begin cnt5s=0; clk5s<=!clk5s; end endmodule So on the GOLDEN TOP sv file how can i call it? Task2 try1(MAX10_CLK1_50,ARDUINO_IO[9]_ARDUINO_IO[8],ARDUINO_IO[7]); I have tried it other ways for example like that ARDUINO_IO[9] : ARDUINO_IO[8], or ARDUINO_IO[9]-ARDUINO_IO[8] and ofc it didnt work! Basically my input for the sel [1:0] is arduino_io [9] and arduino_io[8]. I found how to do it on the pin planner but im just curious to see how it works there. Thanks in advance Replies: Re: On board 2 bit input Ah, missed that! Replies: Re: On board 2 bit input Hi, The error occurs because of this line input logic sel [1:0], in Task2 module due to unpacked array. Have to change to packed array input logic [1:0] sel, Thanks, Best Regards, Sheng Replies: Re: On board 2 bit input You would need to show your top-level code to understand why the I/O is not matching the sel data type. Replies: Re: On board 2 bit input Thank you for your time. Im getting this error Error (10928): SystemVerilog error at DE10_LITE_Golden_Top.v(136): packed array type cannot be assigned to unpacked array type - types do not match and this one Error (10716): SystemVerilog error at DE10_LITE_Golden_Top.v(136): can't pass value from actual to formal input "sel" with incompatible type Same with the other answer from S strell Replies: Re: On board 2 bit input Thank you for your time. Im getting this error Error (10928): SystemVerilog error at DE10_LITE_Golden_Top.v(136): packed array type cannot be assigned to unpacked array type - types do not match and this one Error (10716): SystemVerilog error at DE10_LITE_Golden_Top.v(136): can't pass value from actual to formal input "sel" with incompatible type Same with the answer from Sheng Replies: Re: On board 2 bit input Hi, Or like below also get same result Task2 try1 ( .clk50(MAX10_CLK1_50), .sel({ARDUINO_IO[9], ARDUINO_IO[8]}), .y(ARDUINO_IO[7]) ); Thanks, Best Regards, Sheng Replies: Re: On board 2 bit input Need to see your top-level code, but a correct instantiation would be something like: Task2 try1 (MAX10_CLK1_50,{ARDUINO_IO[9],ARDUINO_IO[8]},ARDUINO_IO[7]); Curly brackets are concatenation. Also note that initial blocks are not synthesizable. You should have a reset control signal and use that to reset all those counters.